U.S. patent application number 15/380017 was filed with the patent office on 2017-04-06 for fast charging method, power adapter and mobile terminal.
This patent application is currently assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LT D.. The applicant listed for this patent is GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.. Invention is credited to Yuanqing ZENG.
Application Number | 20170098942 15/380017 |
Document ID | / |
Family ID | 57247630 |
Filed Date | 2017-04-06 |
United States Patent
Application |
20170098942 |
Kind Code |
A1 |
ZENG; Yuanqing |
April 6, 2017 |
Fast Charging Method, Power Adapter and Mobile Terminal
Abstract
The present disclosure provides a fast charging method, a power
adapter, and a mobile terminal. The method includes: transmitting,
by the power adapter, clock signal to the mobile terminal via a
first data line of the USB interface during a process of that the
power adapter is coupled to the mobile terminal, wherein the clock
signal is used for indicating a communication sequence between the
power adapter and the mobile terminal; conducting, by the power
adapter, a bidirectional communication with the mobile terminal via
a second data line of the USB interface under control of the
communication sequence, so as to determine to charge the mobile
terminal in the fast charging mode; and adjusting, by the power
adapter, charging current to the charging current corresponding to
the fast charging mode to charge the mobile terminal.
Inventors: |
ZENG; Yuanqing; (Dongguan,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD. |
Dongguan |
|
CN |
|
|
Assignee: |
GUANGDONG OPPO MOBILE
TELECOMMUNICATIONS CORP., LT D.
Dongguan
CN
|
Family ID: |
57247630 |
Appl. No.: |
15/380017 |
Filed: |
December 15, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/CN2015/094626 |
Nov 13, 2015 |
|
|
|
15380017 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02J 7/0047 20130101;
H02J 7/0068 20130101; H02J 7/00 20130101; Y02E 60/10 20130101; H02J
7/04 20130101; H04M 19/08 20130101; H02J 7/00034 20200101; H02J
7/007 20130101; H02J 2207/20 20200101; H02J 7/0044 20130101; H02J
7/0021 20130101; H02J 7/02 20130101 |
International
Class: |
H02J 7/00 20060101
H02J007/00; H04M 19/08 20060101 H04M019/08 |
Foreign Application Data
Date |
Code |
Application Number |
May 13, 2015 |
CN |
PCT/CN2015/078898 |
May 13, 2015 |
CN |
PCT/CN2015/078908 |
Claims
1. A power adapter, the power adapter being coupled to a mobile
terminal via a Universal Serial Bus (USB) interface, a power line
of the USB interface being used for the power adapter to charge the
mobile terminal, the power adapter supporting a normal charging
mode and a fast charging mode, a charging current corresponding to
the fast charging mode being greater than a charging current
corresponding to the normal charging mode, the power adapter
comprising: a communication circuit configured to transmit clock
signal to the mobile terminal via a first data line of the USB
interface in a process that the power adapter is coupled to the
mobile terminal, wherein the clock signal is used for indicating a
communication sequence between the power adapter and the mobile
terminal; and the communication circuit is further configured to
conduct a bidirectional communication with the mobile terminal via
a second data line of the USB interface under control of the
communication sequence, so as to determine to charge the mobile
terminal in the fast charging mode; and a current adjusting circuit
configured to adjust a charging current of the power adapter to be
the charging current corresponding to the fast charging mode to
charge the mobile terminal.
2. The power adapter of claim 1, wherein the communication sequence
comprises instruction transmission time slots of the power adapter
and instruction reception time slots of the power adapter, and the
instruction transmission time slots and the instruction reception
time slots are alternatively generated; the communication circuit
is configured to transmit a first instruction to the mobile
terminal via the second data line during the instruction
transmission time slot of the power adapter, and the first
instruction is used to query the mobile terminal for whether or not
to activate the fast charging mode; the communication circuit is
further configured to receive a reply instruction corresponding to
the first instruction via the second data line during the
instruction reception time slot of the power adapter, and the reply
instruction corresponding to the first instruction is used for
indicating that the mobile terminal agrees to activate the fast
charging mode; and the communication circuit is further configured
to determine to charge the mobile terminal in the fast charging
mode according to the reply instruction corresponding to the first
instruction.
3. The power adapter of claim 2, wherein the instruction
transmission time slot of the power adapter comprises a plurality
of clock periods, and each of the plurality of clock periods is
used for transmitting a 1-bit data.
4. The power adapter of claim 3, wherein the instruction
transmission time slot of the power adapter comprises eight clock
periods, and the first instruction comprises an 8-bit data.
5. The power adapter of claim 2, wherein the instruction reception
time slot of the power adapter comprises a plurality of clock
periods, and each of the plurality of clock periods is used for
receiving a 1-bit data.
6. The power adapter of claim 5, wherein the instruction reception
time slot of the power adapter comprises ten clock periods, and the
reply instruction corresponding to the first instruction comprises
a 10-bit data.
7. The power adapter of claim 2, wherein the first instruction is
an instruction of a fast charging communication instruction set of
the power adapter, and instructions of the fast charging
communication instruction set have the same previous n bits.
8. The power adapter of claim 1, wherein each clock period of the
clock signal comprises a low level of 10 .mu.s and a high level of
500 .mu.s.
9. A mobile terminal, the mobile terminal being coupled to a power
adapter via a Universal Serial Bus (USB) interface, a power line of
the USB interface being used for the power adapter to charge the
mobile terminal, the mobile terminal supporting a normal charging
mode and a fast charging mode, charging current corresponding to
the fast charging mode being greater than charging current
corresponding to the normal charging mode, the mobile terminal
comprising: a communication circuit configured to receive clock
signal from the power adapter via a first data line of the USB
interface during a process of that the mobile terminal is coupled
to the power adapter, wherein the clock signal is used for
indicating a communication sequence between the mobile terminal and
the power adapter; the communication circuit is further configured
to conduct a bidirectional communication with the power adapter via
a second data line of the USB interface under control of the
communication sequence, so as to cause the power adapter to
determine to charge the mobile terminal in the fast charging mode;
and a charging circuit configured to receive the charging current
corresponding to the fast charging mode from the power adapter to
charge a battery of the mobile terminal.
10. The mobile terminal of claim 9, wherein the communication
sequence comprises instruction reception time slots of the mobile
terminal and instruction transmission time slots of the mobile
terminal, and the instruction reception time slots and the
instruction transmission time slots are alternatively generated;
the communication circuit is configured to receive a first
instruction from the power adapter via the second data line during
the instruction reception time slot of the mobile terminal, and the
first instruction is used to query the mobile terminal for whether
or not to activate the fast charging mode; and the communication
circuit is further configured to transmit a reply instruction
corresponding to the first instruction to the power adapter via the
second data line during the instruction transmission time slot of
the power adapter, and the reply instruction corresponding to the
first instruction is used for indicating that the mobile terminal
agrees to activate the fast charging mode.
11. The mobile terminal of claim 10, wherein the instruction
reception time slot of the mobile terminal comprises a plurality of
clock periods, and each of the plurality of clock periods is used
for receiving a 1-bit data.
12. The mobile terminal of claim 11, wherein the instruction
reception time slot of the mobile terminal comprises eight clock
periods, and the first instruction comprises an 8-bit data.
13. The mobile terminal of claim 10, wherein the instruction
transmission time slot of the mobile terminal comprises a plurality
of clock periods, and each of the plurality of clock periods is
used for transmitting a 1-bit data.
14. The mobile terminal of claim 13, wherein the instruction
transmission time slot of the mobile terminal comprises ten clock
periods, and the reply instruction corresponding to the first
instruction comprises a 10-bit data.
15. The mobile terminal of claim 10, wherein the reply instruction
corresponding to the first instruction is an instruction of a fast
charging communication instruction set of the mobile terminal, and
instructions of the fast charging communication instruction set
have the same previous n bits.
16. The mobile terminal of claim 9, wherein each clock period of
the clock signal comprises a low level of 10 .mu.s and a high level
of 500 .mu.s.
17. A power adapter, the power adapter being coupled to a mobile
terminal via a Universal Serial Bus (USB) interface, a power line
of the USB interface being used for the power adapter to charge the
mobile terminal, data lines of the USB interface being used for a
bidirectional communication between the power adapter and the
mobile terminal, the power adapter supporting a normal charging
mode and a fast charging mode, a charging current corresponding to
the fast charging mode being greater than a charging current
corresponding to the normal charging mode, the power adapter
comprising: a charging circuit; and a communication control circuit
configured to determine to activate the fast charging mode, and
transmit a second instruction to the mobile terminal, wherein the
second instruction is used for querying whether or not a current
output voltage of the power adapter is proper to be a charging
voltage corresponding to the fast charging mode; the communication
control circuit is further configured to receive a reply
instruction corresponding to the second instruction from the mobile
terminal, wherein the reply instruction corresponding to the second
instruction is used for indicating that the current output voltage
of the power adapter is proper, high, or low; the communication
control circuit is further configured to adjust the current output
voltage of the power adapter to be the charging voltage
corresponding to the fast charging mode according to the reply
instruction corresponding to the second instruction, and transmit a
third instruction to the mobile terminal, wherein the third
instruction is used for querying maximum charging current which is
currently supported by the mobile terminal; the communication
control circuit is further configured to receive a reply
instruction corresponding to the third instruction from the mobile
terminal, wherein the reply instruction corresponding to the third
instruction is used for indicating the maximum charging current
which is currently supported by the mobile terminal; the
communication control circuit is further configured to determine
the charging current corresponding to the fast charging mode
according to the reply instruction corresponding to the third
instruction, adjust output current of the power adapter to be the
charging current corresponding to the fast charging mode to enter a
constant current phase, and transmit a fourth instruction to the
mobile terminal during the constant current phase, wherein the
fourth instruction is used for querying current voltage of a
battery of the mobile terminal; the communication control circuit
is further configured to receive a reply instruction corresponding
to the fourth instruction from the mobile terminal, wherein the
reply instruction corresponding to the fourth instruction is used
for indicating the current voltage of the battery of the mobile
terminal; and the communication control circuit is further
configured to adjust the output current of the power adapter
according to the current voltage of the battery to charge the
mobile terminal in a multi-stage constant current mode via the
charging circuit.
18. The power adapter of claim 17, wherein the communication
control circuit is configured to transmit a first instruction to
the mobile terminal, wherein the first instruction is used for
querying whether or not the mobile terminal is to activate the fast
charging mode; the communication control circuit is further
configured to receive a reply instruction corresponding to the
first instruction from the mobile terminal, wherein the reply
instruction corresponding to the first instruction is used for
indicating that the mobile terminal agrees to activate the fast
charging mode; and the communication control circuit is further
configured to determine to activate the fast charging mode
according to the reply instruction corresponding to the first
instruction.
19. The power adapter of claim 18, wherein the reply instruction
corresponding to the first instruction comprises a plurality of
bits, the plurality of bits comprise a bit used for indicating
whether or not the mobile terminal agrees to activate the fast
charging mode, and a bit used for indicating a path impedance of
the mobile terminal, and the path impedance of the mobile terminal
is used for the power adapter to determine whether or not the USB
interface is in good contact.
20. The power adapter of claim 19, wherein a format of the reply
instruction corresponding to the first instruction is 101XYYYYYY, X
indicates 1 bit, and Y indicates 1 bit, X=1 indicates that the
mobile terminal agrees to activate the fast charging mode, X=0
indicates that the mobile terminal disagrees to activate the fast
charging mode, and the path impedance of the mobile terminal equals
to YYYYYY*5 m.OMEGA..
21. The power adapter of claim 17, wherein the reply instruction
corresponding to the second instruction comprises a plurality of
bits, the plurality of bits of the reply instruction corresponding
to the second instruction comprise a bit used for indicating that
the current output voltage of the power adapter is proper, high, or
low.
22. The power adapter of claim 21, wherein a format of the reply
instruction corresponding to the second instruction is 1010XX0000,
X indicates 1 bit, XX=11 indicates that the current output voltage
of the power adapter is proper, XX=10 indicates that the current
output voltage of the power adapter is high, and XX=01 indicates
that the current output voltage of the power adapter is low.
23. The power adapter of claim 17, wherein the reply instruction
corresponding to the third instruction comprises a plurality of
bits, and the plurality of bits of the reply instruction
corresponding to the third instruction comprise a bit used for
indicating the maximum charging current which is currently
supported by the mobile terminal.
24. The power adapter of claim 23, wherein a format of the reply
instruction corresponding to the third instruction is 1010XXXXXX, X
indicates 1 bit, and the maximum charging current which is
currently supported by the mobile terminal equals to
3000+(XXXXXX*250) mA.
25. The power adapter of claim 17, wherein the reply instruction
corresponding to the fourth instruction comprises a plurality of
bits, and the plurality of bits of the reply instruction
corresponding to the fourth instruction comprise a bit used for
indicating the current voltage of the battery, and a bit used for
indicating whether or not the battery is being charged.
26. The power adapter of claim 25, wherein a format of the reply
instruction corresponding to the fourth instruction is 101XYYYYYY,
X indicates 1 bit, and Y indicates 1 bit, X=1 indicates that the
battery is being charged, and X=0 indicates that the battery is not
charged, the current voltage of the battery equals to
3404+(YYYYYY*16)mV.
27. The power adapter of claim 17, wherein the communication
control circuit is further configured to determine that the USB
interface is in poor contact, and transmit a fifth instruction to
the mobile terminal, wherein the fifth instruction is used for
informing the mobile terminal that the USB interface is in poor
contact, and informing the mobile terminal to exit the fast
charging mode or redetermine whether or not to activate the fast
charging mode.
28. The power adapter of claim 17, wherein the communication
control circuit is further configured to execute at least one of
following operations when the power adapter determines that the
reply instruction received from the mobile terminal is not
correctly encoded, the following operations comprises: exciting the
fast charging mode, stopping charging, or redetermining whether or
not to activate the fast charging mode.
29. The power adapter of claim 17, wherein an instruction
transmitted from the power adapter to the mobile terminal comprises
a plurality of bits, when the power adapter transmits any
instruction, the power adapter firstly transmits MSB of a plurality
of bits of the any instruction; or an instruction received from the
mobile terminal by the power adapter comprises a plurality of bits,
when the power adapter receives an instruction, the power adapter
firstly receives MSB of a plurality of bits of the instruction.
30. The power adapter of claim 17, wherein the instruction
transmitted from the power adapter to the mobile terminal comprises
a plurality of bits, during a process of transmitting each of the
plurality of bits, the power adapter firstly transmits each of the
plurality of bits, and then transmits the clock interrupt signal;
or the reply instruction received from the mobile terminal by the
power adapter comprises a plurality of bits, during a process of
receiving each of the plurality of bits, the power adapter firstly
transmits the clock interrupt signal, and then receives each of the
plurality of bits after a preset time interval.
31. The power adapter of claim 17, wherein each instruction
transmitted from the power adapter to the mobile terminal comprises
an 8-bit data, the power adapter transmits the 8-bit data to the
mobile terminal via eight continuous clock periods of the clock
signal, level of previous 10 .mu.s of each of the eight continuous
clock periods is low level, and level of latter 500 .mu.s of each
of the ten continuous clock periods is high level; or each reply
instruction received from the mobile terminal by the power adapter
comprises a 10-bit data, the power adapter receives the 10-bit data
from the mobile terminal via ten continuous clock periods of the
clock signal, level of previous 500 .mu.s of each of the ten
continuous clock periods is high level, and level of latter 10
.mu.s of each of the ten continuous clock periods is low level.
32. The power adapter of claim 17, wherein during a process of that
the power adapter receives an instruction from the mobile terminal,
a minimum value of high level of the clock signal equals to VDD of
the power adapter minus 0.7V; or during the process of that the
power adapter receives an instruction from the mobile terminal, a
maximum value of low level of the clock signal is 0.8V; or during a
process of that the power adapter transmits an instruction to the
mobile terminal, the minimum value of the high level of the clock
signal equals to 0.25VDD+0.8V; or during the process of that the
power adapter transmits an instruction to the mobile terminal, a
maximum value of the high level of the clock signal is 4.5V; or,
during the process of that the power adapter transmits an
instruction to the mobile terminal, the maximum value of the low
level of the clock signal is 0.15VDD, and the VDD is work voltage
of the power adapter, and/or the VDD is greater than 3.2V and less
than 4.5V.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation application of PCT Patent
Application No. PCT/CN2015/094626, entitled "FAST CHARGING METHOD,
POWER ADAPTER AND MOBILE TERMINAL," filed on Nov. 13, 2015, which
claims priority to PCT Patent Application No. PCT/CN2015/078908,
filed on May 13, 2015, and PCT Patent Application No.
PCT/CN2015/078898, filed on May 13, 2015, all of which are hereby
incorporated in their entireties by reference.
TECHNICAL FIELD
[0002] The present disclosure relates to charging field, and more
particularly to a fast charging method, a power adapter, and a
mobile terminal.
BACKGROUND
[0003] Presently, mobile terminals (e.g., smart phones) become more
and more popular with consumers. However, the power consumption of
mobile terminals is great, thus mobile terminals need to be charged
regularly. As the battery capacity of mobile terminals becomes
greater and greater, correspondingly, the charging time becomes
longer. How to realize fast charging is a problem that needed to be
solved instantly.
[0004] In the present technology, to achieve the purpose of fast
charging, the output current of a power adapter is directly
increased without consideration of endurance of a mobile terminal,
which will result in a phenomenon of the heating and even burnout
of the mobile terminal, and reduces the lifespan of the mobile
terminal.
SUMMARY
[0005] The embodiments of the present disclosure provide a fast
charging method, a power adapter, and a mobile terminal, which can
increase security of a fast charging process.
[0006] A first aspect provides a fast charging method. The method
is applied to a power adapter. The power adapter is coupled to a
mobile terminal via a USB interface. A power line of the USB
interface is used for the power adapter to charge the mobile
terminal. The power adapter supports a normal charging mode and a
fast charging mode, and a charging current corresponding to the
fast charging mode is greater than a charging current corresponding
to the normal charging mode. The method comprises: transmitting, by
the power adapter, clock signal to the mobile terminal via a first
data line of the USB interface in a process of that the power
adapter is coupled to the mobile terminal, wherein the clock signal
is used for indicating a communication sequence between the power
adapter and the mobile terminal; conducting, by the power adapter,
a bidirectional communication with the mobile terminal via a second
data line of the USB interface under control of the communication
sequence to determine to charge the mobile terminal in the fast
charging mode; and adjusting, by the power adapter, a charging
current of the power adapter to be the charging current
corresponding to the fast charging mode to charge the mobile
terminal.
[0007] A second aspect provides a fast charging method. The method
is applied to a mobile terminal. The mobile terminal is coupled to
a power adapter via a USB interface. A power line of the USB
interface is used for the power adapter to charge the mobile
terminal. The mobile terminal supports a normal charging mode and a
fast charging mode, and a charging current corresponding to the
fast charging mode is greater than a charging current corresponding
to the normal charging mode. The method comprises: receiving, by
the mobile terminal, clock signal from the power adapter via a
first data line of the USB interface in a process of that the
mobile terminal is coupled to the power adapter, wherein the clock
signal is used for indicating a communication sequence between the
mobile terminal and the power adapter; conducting, by the mobile
terminal, a bidirectional communication with the power adapter via
a second data line of the USB interface under control of the
communication sequence to cause the power adapter to determine to
charge the mobile terminal in the fast charging mode; and
receiving, by the mobile terminal, charging current corresponding
to the fast charging mode from the power adapter to charge a
battery of the mobile terminal.
[0008] A third aspect provides a power adapter. The power adapter
is coupled to a mobile terminal via a USB interface. A power line
of the USB interface is used for the power adapter to charge the
mobile terminal. The power adapter supports a normal charging mode
and a fast charging mode, and a charging current corresponding to
the fast charging mode is greater than a charging current
corresponding to the normal charging mode. The power adapter
comprises a communication circuit configured to transmit clock
signal to the mobile terminal via a first data line of the USB
interface in a process of that the power adapter is coupled to the
mobile terminal, wherein the clock signal is used for indicating a
communication sequence between the power adapter and the mobile
terminal. The communication circuit is further configured to
conduct a bidirectional communication with the mobile terminal via
a second data line of the USB interface under control of the
communication sequence to determine to charge the mobile terminal
in the fast charging mode. The power adapter further comprises a
current adjusting circuit configured to adjust a charging current
of the power adapter to be the charging current corresponding to
the fast charging mode to charge the mobile terminal.
[0009] A fourth aspect provides a mobile terminal. The mobile
terminal is coupled to a power adapter via a USB interface. A power
line of the USB interface is used for the power adapter to charge
the mobile terminal. The mobile terminal supports a normal charging
mode and a fast charging mode, and a charging current corresponding
to the fast charging mode is greater than a charging current
corresponding to the normal charging mode. The mobile terminal
includes a communication circuit configured to receive clock signal
from the power adapter via a first data line of the USB interface
in a process of that the mobile terminal is coupled to the power
adapter, wherein the clock signal is used for indicating a
communication sequence between the mobile terminal and the power
adapter. The communication circuit is further configured to conduct
a bidirectional communication with the power adapter via a second
data line of the USB interface under control of the communication
sequence to cause the power adapter to determine to charge the
mobile terminal in the fast charging mode. The mobile terminal
further comprises a charging circuit configured to receive the
charging current corresponding to the fast charging mode from the
power adapter to charge a battery of the mobile terminal.
[0010] A fifth aspect provides a fast charging method. The method
is applied to a power adapter. The power adapter is coupled to a
mobile terminal via a USB interface. A power line of the USB
interface is used for the power adapter to charge the mobile
terminal, and data lines of the USB interface are used for a
bidirectional communication between the power adapter and the
mobile terminal. The power adapter supports a normal charging mode
and a fast charging mode, and a charging current corresponding to
the fast charging mode is greater than a charging current
corresponding to the normal charging mode. The method comprises:
determining, by the power adapter, to activate the fast charging
mode; transmitting, by the power adapter, a second instruction to
the mobile terminal, wherein the second instruction is used for
querying whether or not a current output voltage of the power
adapter is proper to be a charging voltage corresponding to the
fast charging mode; receiving, by the power adapter, a reply
instruction corresponding to the second instruction from the mobile
terminal, wherein the reply instruction corresponding to the second
instruction is used for indicating that the current output voltage
of the power adapter is proper, high, or low; adjusting, by the
power adapter, the current output voltage of the power adapter to
be the charging voltage corresponding to the fast charging mode
according to the reply instruction corresponding to the second
instruction; transmitting, by the power adapter, a third
instruction to the mobile terminal, wherein the third instruction
is used for querying maximum charging current which is currently
supported by the mobile terminal; receiving, by the power adapter,
a reply instruction corresponding to the third instruction from the
mobile terminal, wherein the reply instruction corresponding to the
third instruction is used for indicating the maximum charging
current which is currently supported by the mobile terminal;
determining, by the power adapter, the charging current
corresponding to the fast charging mode according to the reply
instruction corresponding to the third instruction; adjusting, by
the power adapter, an output current of the power adapter to be the
charging current corresponding to the fast charging mode to enter a
constant current phase; transmitting, by the power adapter, a
fourth instruction to the mobile terminal during the constant
current phase, wherein the fourth instruction is used for querying
current voltage of a battery of the mobile terminal; receiving, by
the power adapter, a reply instruction corresponding to the fourth
instruction from the mobile terminal, wherein the reply instruction
corresponding to the fourth instruction is used for indicating the
current voltage of the battery of the mobile terminal; and
adjusting, by the power adapter, the output current of the power
adapter according to the current voltage of the battery to charge
the mobile terminal in a multi-stage constant current mode.
[0011] A sixth aspect provides a fast charging method. The fast
charging method is applied in a mobile terminal. The mobile
terminal is coupled to a power adapter via a USB interface. A power
line of the USB interface is used for charging the mobile terminal.
Data lines of the USB interface are used for a bidirectional
communication between the mobile terminal and the power adapter.
The mobile terminal supports a normal charging mode and a fast
charging mode, and a charging current corresponding to the fast
charging mode is greater than a charging current corresponding to
the normal charging mode. The method comprises: determining, by the
mobile terminal, to activate the fast charging mode; receiving, by
the mobile terminal, a second instruction from the power adapter,
wherein the second instruction is used for querying whether or not
a current output voltage of the power adapter is proper to be a
charging voltage corresponding to the fast charging mode;
transmitting, by the mobile terminal, a reply instruction
corresponding to the second instruction to the mobile terminal,
wherein the reply instruction corresponding to the second
instruction is used for indicating that the current output voltage
of the power adapter is proper, high, or low, so as to cause the
power adapter to adjust the current output voltage of the power
adapter to be the charging voltage corresponding to the fast
charging mode according to the reply instruction corresponding to
the second instruction; receiving, by the mobile terminal, a third
instruction from the power adapter, wherein the third instruction
is used for querying maximum charging current which is currently
supported by the mobile terminal; transmitting, by the mobile
terminal, a reply instruction corresponding to the third
instruction to the power adapter, wherein the reply instruction
corresponding to the third instruction is used for indicating the
maximum charging current which is currently supported by the mobile
terminal, so as to cause the power adapter to determine the
charging current corresponding to the fast charging mode according
to the reply instruction corresponding to the third instruction;
receiving, by the mobile terminal, a fourth instruction from the
power adapter after the power adapter adjusts output current to the
charging current corresponding to the fast charging mode and enters
a constant current phase, wherein the fourth instruction is used
for querying current voltage of a battery of the mobile terminal;
and transmitting, by the mobile terminal, a reply instruction
corresponding to the fourth instruction to the power adapter,
wherein the reply instruction corresponding to the fourth
instruction is used for indicating the current voltage of the
battery of the mobile terminal, so as to cause the power adapter to
adjust the output current of the power adapter according to the
current voltage of the battery to charge the mobile terminal in a
multi-stage constant current mode.
[0012] A seventh aspect provides a power adapter. The power adapter
is coupled to a mobile terminal via a USB interface. A power line
of the USB interface is used for the power adapter to charge the
mobile terminal. Data lines of the USB interface are used for a
bidirectional communication between the power adapter and the
mobile terminal. The power adapter supports a normal charging mode
and a fast charging mode, and a charging current corresponding to
the fast charging mode is greater than a charging current
corresponding to the normal charging mode. The power adapter
comprises a charging circuit and a communication control circuit.
The communication control circuit is configured to determine to
activate the fast charging mode, and transmit a second instruction
to the mobile terminal, wherein the second instruction is used for
querying whether or not a current output voltage of the power
adapter is proper to be a charging voltage corresponding to the
fast charging mode; the communication control circuit is further
configured to receive a reply instruction corresponding to the
second instruction from the mobile terminal, wherein the reply
instruction corresponding to the second instruction is used for
indicating that the current output voltage of the power adapter is
proper, high, or low; the communication control circuit is further
configured to adjust the current output voltage of the power
adapter to the charging voltage corresponding to the fast charging
mode according to the reply instruction corresponding to the second
instruction, and transmit a third instruction to the mobile
terminal, wherein the third instruction is used for querying
maximum charging current which is currently supported by the mobile
terminal; the communication control circuit is further configured
to receive a reply instruction corresponding to the third
instruction from the mobile terminal, wherein the reply instruction
corresponding to the third instruction is used for indicating the
maximum charging current which is currently supported by the mobile
terminal; the communication control circuit is further configured
to determine the charging current corresponding to the fast
charging mode according to the reply instruction corresponding to
the third instruction, adjust an output current of the power
adapter to be the charging current corresponding to the fast
charging mode to enter a constant current phase, and transmit a
fourth instruction to the mobile terminal during the constant
current phase, wherein the fourth instruction is used for querying
current voltage of a battery of the mobile terminal; the
communication control circuit is further configured to receive a
reply instruction corresponding to the fourth instruction from the
mobile terminal, wherein the reply instruction corresponding to the
fourth instruction is used for indicating the current voltage of
the battery of the mobile terminal; and the communication control
circuit is further configured to adjust the output current of the
power adapter according to the current voltage of the battery to
charge the mobile terminal in a multi-stage constant current mode
via the charging circuit.
[0013] An eighth aspect provides a mobile terminal. The mobile
terminal is coupled to a power adapter via a USB interface. A power
line of the USB interface is used for charging the mobile terminal.
Data lines of the USB interface are used for a bidirectional
communication between the mobile terminal and the power adapter,
the power adapter supporting a normal charging mode and a fast
charging mode, and a charging current corresponding to the fast
charging mode is greater than a charging current corresponding to
the normal charging mode. The power adapter comprises a charging
circuit and a communication control circuit. The communication
control circuit is configured to determine to activate the fast
charging mode, receive a second instruction from the power adapter,
wherein the second instruction is used for querying whether or not
a current output voltage of the power adapter is proper to be a
charging voltage corresponding to the fast charging mode; a
communication control circuit is further configured to transmit a
reply instruction corresponding to the second instruction to the
mobile terminal, wherein the reply instruction corresponding to the
second instruction is used for indicating that the current output
voltage of the power adapter is proper, high, or low, so as to
cause the power adapter to adjust the current output voltage of the
power adapter to the charging voltage corresponding to the fast
charging mode according to the reply instruction corresponding to
the second instruction; the communication control circuit is
further configured to receive a third instruction from the power
adapter, wherein the third instruction is used for querying maximum
charging current which is currently supported by the mobile
terminal; the communication control circuit is further configured
to transmit a reply instruction corresponding to the third
instruction, wherein the reply instruction corresponding to the
third instruction is used for indicating the maximum charging
current which is currently supported by the mobile terminal, so as
to cause the power adapter to determine the charging current
corresponding to the fast charging mode according to the reply
instruction corresponding to the third instruction; the
communication control circuit is further configured to receive a
fourth instruction from the power adapter after the power adapter
adjusts output current to the charging current corresponding to the
fast charging mode and enters a constant current phase, wherein the
fourth instruction is used for querying current voltage of a
battery of the mobile terminal; and the communication control
circuit is further configured to transmit a reply instruction
corresponding to the fourth instruction to the power adapter,
wherein the reply instruction corresponding to the fourth
instruction is used for indicating the current voltage of the
battery of the mobile terminal, so as to cause the power adapter to
adjust the output current of the power adapter according to the
current voltage of the battery to charge the mobile terminal in a
multi-stage constant current mode via the charging circuit.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] To better illustrate the technical solution of embodiments
of the present disclosure, the following descriptions will briefly
illustrate the accompanying drawings described in the embodiments.
Obviously, the following described accompanying drawings are some
embodiments of the present disclosure. Those skilled in the art can
obtain other accompanying drawings according to the described
accompanying drawings without creative work.
[0015] FIG. 1 is a schematic flow chart of a fast charging method
in accordance with an exemplary embodiment of the present
disclosure.
[0016] FIG. 2 is a schematic flow chart of a fast charging method
in accordance with an exemplary embodiment of the present
disclosure.
[0017] FIG. 3 is a schematic view showing that a power adapter
implements a data reception and transmission in accordance with an
exemplary embodiment of the present disclosure.
[0018] FIG. 4 is a schematic view of a sequence of that the power
adapter implements a communication in accordance with an exemplary
embodiment of the present disclosure.
[0019] FIG. 5 is a schematic view of a sequence of that the power
adapter implements a communication in accordance with an exemplary
embodiment of the present disclosure.
[0020] FIG. 6 is a schematic structural diagram of a power adapter
in accordance with an exemplary embodiment of the present
disclosure.
[0021] FIG. 7 is a schematic structural diagram of a mobile
terminal in accordance with an exemplary embodiment of the present
disclosure.
[0022] FIG. 8 is a schematic flow chart of a fast charging method
in accordance with an exemplary embodiment of the present
disclosure.
[0023] FIG. 9 is a schematic flow chart of a fast charging method
in accordance with an exemplary embodiment of the present
disclosure.
[0024] FIG. 10 is a diagrammatic view of a power adapter in
accordance with an exemplary embodiment of the present
disclosure.
[0025] FIG. 11 is a diagrammatic view of a mobile terminal in
accordance with an exemplary embodiment of the present
disclosure.
DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS
[0026] In combination with the first aspect, in an implementation
manner of the first aspect, the communication sequence comprises
instruction transmission time slots of the power adapter and
instruction reception time slots of the power adapter, and the
instruction transmission time slots and the instruction reception
time slots are alternatively generated. Conducting, by the power
adapter, the bidirectional communication with the mobile terminal
via the second data line of the USB interface under control of the
communication sequence to determine to charge the mobile terminal
in the fast charging mode comprises: transmitting, by the power
adapter, a first instruction to the mobile terminal via the second
data line during the instruction transmission time slot of the
power adapter, wherein the first instruction is used for querying
the mobile terminal for whether or not to activate the fast
charging mode; receiving, by the power adapter, a reply instruction
corresponding to the first instruction via the second data line
during the instruction reception time slot of the power adapter,
wherein the reply instruction corresponding to the first
instruction is used for indicating that the mobile terminal agrees
to activate the fast charging mode; and determining, by the power
adapter, to charge the mobile terminal in the fast charging mode
according to the reply instruction corresponding to the first
instruction.
[0027] In combination with the first aspect or any of the above
implementation manners, in another implementation manner of the
first aspect, the instruction transmission time slot of the power
adapter comprises a plurality of clock periods, and each of the
plurality of clock periods is used for transmitting a 1-bit
data.
[0028] In combination with the first aspect or any of the above
implementation manners, in another implementation manner of the
first aspect, the instruction transmission time slot of the power
adapter comprises eight clock periods, and the first instruction
comprises an 8-bit data.
[0029] In combination with the first aspect or any of the above
implementation manners, in another implementation manner of the
first aspect, the instruction reception time slot of the power
adapter comprises a plurality of clock periods, and each of the
plurality of clock periods is used for receiving a 1-bit data.
[0030] In combination with the first aspect or any of the above
implementation manners, in another implementation manner of the
first aspect, the instruction reception time slot of the power
adapter comprises ten clock periods, and the reply instruction
corresponding to the first instruction comprises a 10-bit data.
[0031] In combination with the first aspect or any of the above
implementation manners, in another implementation manner of the
first aspect, the first instruction is an instruction of a fast
charging communication instruction set of the power adapter, and
instructions of the fast charging communication instruction set
have the same previous n bits.
[0032] In combination with the first aspect or any of the above
implementation manners, in another implementation manner of the
first aspect, each clock period of the clock signal comprises a low
level of 10 .mu.s and a high level of 500 .mu.s.
[0033] In combination with the first aspect or any of the above
implementation manners, in another implementation manner of the
first aspect, the first data line is a D+ data line of the USB
interface, and the second data line is a D- data line of the USB
interface.
[0034] In combination with the second aspect, in an implementation
of the second aspect, the communication sequence comprises
instruction reception time slots of the mobile terminal and
instruction transmission time slots of the mobile terminal, and the
instruction reception time slots and the instruction transmission
time slots are alternatively generated. Conducting, by the mobile
terminal, the bidirectional communication with the power adapter
via the second data line of the USB interface under control of the
communication sequence to cause the power adapter to determine to
charge the mobile terminal in the fast charging mode comprises:
receiving, by the mobile terminal, a first instruction from the
power adapter via the second data line during the instruction
reception time slot of the mobile terminal, wherein the first
instruction is used to query the mobile terminal for whether or not
to activate the fast charging mode; and transmitting, by the mobile
terminal, a reply instruction corresponding to the first
instruction to the power adapter via the second data line during
the instruction transmission time slot of the power adapter,
wherein the reply instruction corresponding to the first
instruction is used for indicating that the mobile terminal agrees
to activate the fast charging mode.
[0035] In combination with the second aspect or any of the above
implementation manners, in another implementation manner of the
second aspect, the instruction reception time slot of the mobile
terminal comprises a plurality of clock periods, and each of the
plurality of clock periods is used for receiving a 1-bit data.
[0036] In combination with the second aspect or any of the above
implementation manners, in another implementation manner of the
second aspect, the instruction reception time slot of the mobile
terminal comprises eight clock periods, and the first instruction
comprises an 8-bit data.
[0037] In combination with the second aspect or any of the above
implementation manners, in another implementation manner of the
second aspect, the instruction transmission time slot of the mobile
terminal comprises a plurality of clock periods, and each of the
plurality of clock periods is used for transmitting a 1-bit
data.
[0038] In combination with the second aspect or any of the above
implementation manners, in another implementation manner of the
second aspect, the instruction transmission time slot of the mobile
terminal comprises ten clock periods, and the reply instruction
corresponding to the first instruction comprises a 10-bit data.
[0039] In combination with the second aspect or any of the above
implementation manners, in another implementation manner of the
second aspect, the reply instruction corresponding to the first
instruction is an instruction of a fast charging communication
instruction set of the mobile terminal, and instructions of the
fast charging communication instruction set have the same previous
n bits.
[0040] In combination with the third aspect, in an implementation
manner of the third aspect, the communication sequence comprises
instruction transmission time slots of the power adapter and
instruction reception time slots of the power adapter, and the
instruction transmission time slots and the instruction reception
time slots are alternatively generated. The communication circuit
is configured to transmit a first instruction to the mobile
terminal via the second data line during the instruction
transmission time slot of the power adapter, and the first
instruction is used to query the mobile terminal for whether or not
to activate the fast charging mode or not. The communication
circuit is further configured to receive a reply instruction
corresponding to the first instruction via the second data line
during the instruction reception time slot of the power adapter,
and the reply instruction corresponding to the first instruction is
used for indicating that the mobile terminal agrees to activate the
fast charging mode. The communication circuit is further configured
to determine to charge the mobile terminal in the fast charging
mode according to the reply instruction corresponding to the first
instruction.
[0041] In combination with the third aspect or any of the above
implementation manners, in another implementation manner of the
third aspect, the instruction transmission time slot of the power
adapter comprises a plurality of clock periods, and each of the
plurality of clock periods is used for transmitting a 1-bit
data.
[0042] In combination with the third aspect or any of the above
implementation manners, in another implementation manner of the
third aspect, the instruction transmission time slot of the power
adapter comprises eight clock periods, and the first instruction
comprises an 8-bit data.
[0043] In combination with the third aspect or any of the above
implementation manners, in another implementation manner of the
third aspect, the instruction reception time slot of the power
adapter comprises a plurality of clock periods, and each of the
plurality of clock periods is used for receiving a 1-bit data.
[0044] In combination with the third aspect or any of the above
implementation manners, in another implementation manner of the
third aspect, the instruction reception time slot of the power
adapter comprises ten clock periods, and the reply instruction
corresponding to the first instruction comprises a 10-bit data.
[0045] In combination with the third aspect or any of the above
implementation manners, in another implementation manner of the
third aspect, the first instruction is an instruction of a fast
charging communication instruction set of the power adapter, and
instructions of the fast charging communication instruction set
have the same previous n bits.
[0046] In combination with the third aspect or any of the above
implementation manners, in another implementation manner of the
third aspect, each clock period of the clock signal comprises a low
level of 10 .mu.s and a high level of 500 .mu.s.
[0047] In combination with the third aspect or any of the above
implementation manners, in another implementation manner of the
third aspect, the first data line is a D+ data line of the USB
interface, and the second data line is a D- data line of the USB
interface.
[0048] In combination with the second aspect or any of the above
implementation manners, in another implementation manner of the
second aspect, each clock period of the clock signal comprises a
low level of 10 .mu.s and a high level of 500 .mu.s.
[0049] In combination with the second aspect or any of the above
implementation manners, in another implementation manner of the
second aspect, the first data line is a D+ data line of the USB
interface, and the second data line is a D- data line of the USB
interface.
[0050] In combination with the fourth aspect, in an implementation
manner of the fourth aspect, the communication sequence comprises
instruction reception time slots of the mobile terminal and
instruction transmission time slots of the mobile terminal, and the
instruction reception time slots and the instruction transmission
time slots are alternatively generated. The communication circuit
is configured to receive a first instruction from the power adapter
via the second data line during the instruction reception time slot
of the mobile terminal, and the first instruction is used to query
the mobile terminal for whether or not to activate the fast
charging mode. The communication circuit is further configured to
transmit a reply instruction corresponding to the first instruction
to the power adapter via the second data line during the
instruction transmission time slot of the mobile terminal, and the
reply instruction corresponding to the first instruction is used
for indicating that the mobile terminal agrees to activate the fast
charging mode.
[0051] In combination with the fourth aspect or any of the above
implementation manners, in another implementation manner of the
fourth aspect, the instruction reception time slot of the mobile
terminal comprises a plurality of clock periods, and each of the
plurality of clock periods is used for receiving a 1-bit data.
[0052] In combination with the fourth aspect or any of the above
implementation manners, in another implementation manner of the
fourth aspect, the instruction reception time slot of the mobile
terminal comprises eight clock periods, and the first instruction
comprises an 8-bit data.
[0053] In combination with the fourth aspect or any of the above
implementation manners, in another implementation manner of the
fourth aspect, the instruction transmission time slot of the mobile
terminal comprises a plurality of clock periods, and each of the
plurality of clock periods is used for transmitting a 1-bit
data.
[0054] In combination with the fourth aspect or any of the above
implementation manners, in another implementation manner of the
fourth aspect, the instruction transmission time slot of the mobile
terminal comprises ten clock periods, and the reply instruction
corresponding to the first instruction comprises a 10-bit data.
[0055] In combination with the fourth aspect or any of the above
implementation manners, in another implementation manner of the
fourth aspect, the reply instruction corresponding to the first
instruction is an instruction of a fast charging communication
instruction set of the mobile terminal, and instructions of the
fast charging communication instruction set have the same previous
n bits.
[0056] In combination with the fourth aspect or any of the above
implementation manners, in another implementation manner of the
fourth aspect, each clock period of the clock signal comprises a
low level of 10 .mu.s and a high level of 500 .mu.s.
[0057] In combination with the fourth aspect or any of the above
implementation manners, in another implementation manner of the
fourth aspect, the first data line is a D+ data line of the USB
interface, and the second data line is a D- data line of the USB
interface.
[0058] In combination with the fifth aspect, in an implementation
manner of the fifth aspect, determining to activate the fast
charging mode by the power adapter comprises: transmitting, by the
power adapter, a first instruction to the mobile terminal, wherein
the first instruction is used for querying whether or not the
mobile terminal is to activate the fast charging mode; receiving,
by the power adapter, a reply instruction corresponding to the
first instruction from the mobile terminal, wherein the reply
instruction corresponding to the first instruction is used for
indicating that the mobile terminal agrees to activate the fast
charging mode; and determining, by the power adapter, to activate
the fast charging mode according to the reply instruction
corresponding to the first instruction.
[0059] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the reply instruction corresponding to the first
instruction comprises a plurality of bits, the plurality of bits
comprise a bit used for indicating whether or not the mobile
terminal agrees to activate the fast charging mode, and a bit used
for indicating a path impedance of the mobile terminal, and the
path impedance of the mobile terminal is used for the power adapter
to determine whether or not the USB interface is in good
contact.
[0060] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, a format of the reply instruction corresponding to
the first instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the mobile terminal agrees to
activate the fast charging mode, X=0 indicates that the mobile
terminal disagrees to activate the fast charging mode, and the path
impedance of the mobile terminal equals to YYYYYY*5 m.OMEGA..
[0061] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the first instruction is 10101000 or 0xA8.
[0062] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the reply instruction corresponding to the second
instruction comprises a plurality of bits, the plurality of bits of
the reply instruction corresponding to the second instruction
comprise a bit used for indicating that the current output voltage
of the power adapter is proper, high, or low.
[0063] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, a format of the reply instruction corresponding to
the second instruction is 1010XX0000, X indicates 1 bit, XX=11
indicates that the current output voltage of the power adapter is
proper, XX=10 indicates that the current output voltage of the
power adapter is high, and XX=01 indicates that the current output
voltage of the power adapter is low.
[0064] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the second instruction is 10100100 or 0xA4.
[0065] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the reply instruction corresponding to the third
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the third
instruction comprise a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0066] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, a format of the reply instruction corresponding to
the third instruction is 1010XXXXXX, X indicates 1 bit, and the
maximum charging current which is currently supported by the mobile
terminal equals to 3000+(XXXXXX*250) mA.
[0067] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the third instruction is 10100110 or 0xA6.
[0068] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the reply instruction corresponding to the fourth
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the fourth
instruction comprise a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0069] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, a format of the reply instruction corresponding to
the fourth instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the battery is being charged,
and X=0 indicates that the battery is not charged, the current
voltage of the battery equals to 3404+(YYYYYY*16)mV.
[0070] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the fourth instruction is 10100010 or 0xA2.
[0071] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the method further comprises: determining, by the
power adapter, that the USB interface is in poor contact; and
transmitting, by the power adapter, a fifth instruction to the
mobile terminal, wherein the fifth instruction is used for
informing the mobile terminal that the USB interface is in poor
contact, and informing the mobile terminal to exit the fast
charging mode or redetermine whether or not to activate the fast
charging mode.
[0072] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the fifth instruction is 10110010 or 0xB2.
[0073] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the method further comprises: executing, by the power
adapter, at least one of following operations when the power
adapter determines that the reply instruction received from the
mobile terminal is not correctly encoded, wherein the following
operations comprise: exciting the fast charging mode, stopping
charging, or redetermining whether or not to activate the fast
charging mode.
[0074] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, an instruction transmitted from the power adapter to
the mobile terminal comprises a plurality of bits, when the power
adapter transmits any instruction, the power adapter firstly
transmits MSB of a plurality of bits of the any instruction; or an
instruction received from the mobile terminal by the power adapter
comprises a plurality of bits, when the power adapter receives an
instruction, the power adapter firstly receives MSB of a plurality
of bits of the instruction.
[0075] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the clock signal or clock interrupt signal used in
the communication between the power adapter and the mobile terminal
is provided by the power adapter.
[0076] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, the instruction transmitted from the power adapter to
the mobile terminal comprises a plurality of bits, during a process
of transmitting each of the plurality of bits, the power adapter
firstly transmits each of the plurality of bits, and then transmits
the clock interrupt signal; or the reply instruction received from
the mobile terminal by the power adapter comprises a plurality of
bits, during a process of receiving each of the plurality of bits,
the power adapter firstly transmits the clock interrupt signal, and
then receives each of the plurality of bits after a preset time
interval.
[0077] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, each instruction transmitted from the power adapter
to the mobile terminal comprises an 8-bit data, the power adapter
transmits the 8-bit data to the mobile terminal via eight
continuous clock periods of the clock signal, level of previous 10
.mu.s of each of the eight continuous clock periods is low level,
and level of latter 500 .mu.s of each of the eight continuous clock
periods is high level; or each reply instruction received from the
mobile terminal by the power adapter comprises a 10-bit data, the
power adapter receives the 10-bit data from the mobile terminal via
ten continuous clock periods of the clock signal, level of previous
500 .mu.s of each of the ten continuous clock periods is high
level, and level of latter 10 .mu.s of each of the ten continuous
clock periods is low level.
[0078] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, during a process of that the power adapter receives
an instruction from the mobile terminal, a minimum value of high
level of the clock signal equals to VDD of the power adapter minus
0.7V; or during the process of that the power adapter receives an
instruction from the mobile terminal, a maximum value of low level
of the clock signal is 0.8V; or during a process of that the power
adapter transmits an instruction to the mobile terminal, the
minimum value of the high level of the clock signal equals to
0.25VDD+0.8V; or during the process of that the power adapter
transmits an instruction to the mobile terminal, a maximum value of
the high level of the clock signal is 4.5V; or, during the process
of that the power adapter transmits an instruction to the mobile
terminal, the maximum value of the low level of the clock signal is
0.15VDD, and the VDD is work voltage of the power adapter, and/or
the VDD is greater than 3.2V and less than 4.5V.
[0079] In combination with the fifth aspect or any of the above
implementation manners, in another implementation manner of the
fifth aspect, after the mobile terminal receives the clock
interrupt signal, holding time of a data of an instruction
transmitted from the power adapter to the mobile terminal is
500.+-.5 .mu.s.
[0080] In combination with the sixth aspect, in an implementation
manner of the sixth aspect, determining to activate the fast
charging mode by the mobile terminal comprises: receiving, by the
mobile terminal, a first instruction from the power adapter,
wherein the first instruction is used for querying whether or not
the mobile terminal is to activate the fast charging mode; and
transmitting, by the mobile terminal, a reply instruction
corresponding to the first instruction to the power adapter,
wherein the reply instruction corresponding to the first
instruction is used for indicating that the mobile terminal agrees
to activate the fast charging mode.
[0081] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the reply instruction corresponding to the first
instruction comprises a plurality of bits, the plurality of bits
comprise a bit used for indicating whether or not the mobile
terminal agrees to activate the fast charging mode, and a bit used
for indicating a path impedance of the mobile terminal, and the
path impedance of the mobile terminal is used for the power adapter
to determine whether or not the USB interface is in good
contact.
[0082] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, a format of the reply instruction corresponding to
the first instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the mobile terminal agrees to
activate the fast charging mode, X=0 indicates that the mobile
terminal disagrees to activate the fast charging mode, and the path
impedance of the mobile terminal equals to YYYYYY*5 m.OMEGA..
[0083] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the first instruction is 10101000 or 0xA8.
[0084] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the reply instruction corresponding to the second
instruction comprise a plurality of bits, the plurality of bits of
the reply instruction corresponding to the second instruction
comprise a bit used for indicating that the current output voltage
of the power adapter is proper, high, or low.
[0085] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, a format of the reply instruction corresponding to
the second instruction is 1010XX0000, X indicates 1 bit, XX=11
indicates that the current output voltage of the power adapter is
proper, XX=10 indicates that the current output voltage of the
power adapter is high, and XX=01 indicates that the current output
voltage of the power adapter is low.
[0086] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the second instruction is 10100100 or 0xA4.
[0087] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, a reply instruction corresponding to the third
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the third
instruction comprise a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0088] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, a format of the reply instruction corresponding to
the third instruction is 1010XXXXXX, X indicates 1 bit, and the
maximum charging current which is currently supported by the mobile
terminal equals to 3000+(XXXXXX*250) mA.
[0089] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the third instruction is 10100110 or 0xA6.
[0090] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the reply instruction corresponding to the fourth
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the fourth
instruction comprise a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0091] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, a format of the reply instruction corresponding to
the fourth instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the battery is being charged,
and X=0 indicates that the battery is not charged, the current
voltage of the battery equals to 3404+(YYYYYY*16)mV.
[0092] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the fourth instruction is 10100010 or 0xA2.
[0093] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the method further comprises: receiving, by the
mobile terminal, a fifth instruction from the power adapter,
wherein the fifth instruction is used for informing the mobile
terminal that the USB interface is in poor contact, and informing
the mobile terminal to exit the fast charging mode or activate the
fast charging mode again.
[0094] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the fifth instruction is 10110010 or 0xB2.
[0095] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the method further comprises: executing, by the
mobile terminal, at least one of following operations when the
power adapter determines that the reply instruction received from
the mobile terminal is not correctly encoded, wherein the following
operations comprise: exciting the fast charging mode, stopping
charging, or redetermining whether or not to activate the fast
charging mode.
[0096] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, an instruction transmitted from the mobile terminal
to the power adapter comprises a plurality of bits, when the mobile
terminal transmits any instruction, the mobile terminal firstly
transmits MSB of a plurality of bits of the any instruction; or an
instruction received from the power adapter by the mobile terminal
comprises a plurality of bits, when the mobile terminal receives an
instruction, the mobile terminal firstly receives MSB of a
plurality of bits of the instruction.
[0097] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the clock signal or clock interrupt signal used in
the communication between the power adapter and the mobile terminal
is provided by the power adapter.
[0098] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, the instruction transmitted from the power adapter to
the mobile terminal comprises a plurality of bits, during a process
of transmitting each of the plurality of bits, the power adapter
firstly transmits each of the plurality of bits, and then transmits
the clock interrupt signal; or the reply instruction received from
the mobile terminal by the power adapter comprises a plurality of
bits, during a process of receiving each of the plurality of bits,
the power adapter firstly transmits the clock interrupt signal, and
then receives each of the plurality of bits after a preset time
interval.
[0099] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, each instruction transmitted from the power adapter
to the mobile terminal comprises an 8-bit data, the power adapter
transmits the 8-bit data to the mobile terminal via eight
continuous clock periods of the clock signal, level of previous 10
.mu.s of each of the eight continuous clock periods is low level,
and level of latter 500 .mu.s of each of the eight continuous clock
periods is high level; or each reply instruction received from the
mobile terminal by the power adapter comprises a 10-bit data, the
power adapter receives the 10-bit data from the mobile terminal via
ten continuous clock periods of the clock signal, level of previous
500 .mu.s of each of the ten continuous clock periods is high
level, and level of latter 10 .mu.s of each of the ten continuous
clock periods is low level.
[0100] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, during a process of that the power adapter receives
an instruction from the mobile terminal, a minimum value of high
level of the clock signal equals to VDD of the power adapter minus
0.7V; or during the process of that the power adapter receives an
instruction from the mobile terminal, a maximum value of low level
of the clock signal is 0.8V; or during a process of that the power
adapter transmits an instruction to the mobile terminal, the
minimum value of the high level of the clock signal equals to
0.25VDD+0.8V; or during the process of that the power adapter
transmits an instruction to the mobile terminal, a maximum value of
the high level of the clock signal is 4.5V; or, during the process
of that the power adapter transmits an instruction to the mobile
terminal, the maximum value of the low level of the clock signal is
0.15VDD, and the VDD is work voltage of the power adapter, and/or
the VDD is greater than 3.2V and less than 4.5V.
[0101] In combination with the seventh aspect, in an implementation
manner of the seventh aspect, the communication control circuit is
configured to transmit a first instruction to the mobile terminal,
wherein the first instruction is used for querying whether or not
the mobile terminal is to activate the fast charging mode; the
communication control circuit is further configured to receive a
reply instruction corresponding to the first instruction from the
mobile terminal, wherein the reply instruction corresponding to the
first instruction is used for indicating that the mobile terminal
agrees to activate the fast charging mode; and the communication
control circuit is further configured to determine to activate the
fast charging mode according to the reply instruction corresponding
to the first instruction.
[0102] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the reply instruction corresponding to the first
instruction comprises a plurality of bits, the plurality of bits
comprise a bit used for indicating whether or not the mobile
terminal agrees to activate the fast charging mode, and a bit used
for indicating a path impedance of the mobile terminal, and the
path impedance of the mobile terminal is used for the power adapter
to determine whether or not the USB interface is in good
contact.
[0103] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, a format of the reply instruction corresponding to
the first instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the mobile terminal agrees to
activate the fast charging mode, X=0 indicates that the mobile
terminal disagrees to activate the fast charging mode, and the path
impedance of the mobile terminal equals to YYYYYY*5 m.OMEGA..
[0104] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the first instruction is 10101000 or 0xA8.
[0105] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the reply instruction corresponding to the second
instruction comprises a plurality of bits, the plurality of bits of
the reply instruction corresponding to the second instruction
comprise a bit used for indicating that the current output voltage
of the power adapter is proper, high, or low.
[0106] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, a format of the reply instruction corresponding to
the second instruction is 1010XX0000, X indicates 1 bit, XX=11
indicates that the current output voltage of the power adapter is
proper, XX=10 indicates that the current output voltage of the
power adapter is high, and XX=01 indicates that the current output
voltage of the power adapter is low.
[0107] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the second instruction is 10100100 or 0xA4.
[0108] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the reply instruction corresponding to the third
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the third
instruction comprise a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0109] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, a format of the reply instruction corresponding to
the third instruction is 1010XXXXXX, X indicates 1 bit, and the
maximum charging current which is currently supported by the mobile
terminal equals to 3000+(XXXXXX*250) mA.
[0110] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the third instruction is 10100110 or 0xA6.
[0111] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the reply instruction corresponding to the fourth
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the fourth
instruction comprise a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0112] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, a format of the reply instruction corresponding to
the fourth instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the battery is being charged,
and X=0 indicates that the battery is not charged, the current
voltage of the battery equals to 3404+(YYYYYY*16)mV.
[0113] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the fourth instruction is 10100010 or 0xA2.
[0114] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the communication control circuit is further
configured to determine that the USB interface is in poor contact,
and transmit a fifth instruction to the mobile terminal, wherein
the fifth instruction is used for informing the mobile terminal
that the USB interface is in poor contact, and informing the mobile
terminal to exit the fast charging mode or redetermine whether or
not to activate the fast charging mode.
[0115] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the fifth instruction is 10110010 or 0xB2.
[0116] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the communication control circuit is further
configured to execute at least one of following operations when the
power adapter determines that the reply instruction received from
the mobile terminal is not correctly encoded, wherein the following
operations comprises: exciting the fast charging mode, stopping
charging, or redetermining whether or not to activate the fast
charging mode.
[0117] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, an instruction transmitted from the power adapter
to the mobile terminal comprises a plurality of bits, when the
power adapter transmits any instruction, the power adapter firstly
transmits MSB of a plurality of bits of the any instruction; or an
instruction received from the mobile terminal by the power adapter
comprises a plurality of bits, when the power adapter receives an
instruction, the power adapter firstly receives MSB of a plurality
of bits of the instruction.
[0118] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the clock signal or clock interrupt signal used in
the communication between the power adapter and the mobile terminal
is provided by the power adapter.
[0119] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, the instruction transmitted from the power adapter
to the mobile terminal comprises a plurality of bits, during a
process of transmitting each of the plurality of bits, the power
adapter firstly transmits each of the plurality of bits, and then
transmits the clock interrupt signal; or the reply instruction
received from the mobile terminal by the power adapter comprises a
plurality of bits, during a process of receiving each of the
plurality of bits, the power adapter firstly transmits the clock
interrupt signal, and then receives each of the plurality of bits
after a preset time interval.
[0120] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, each instruction transmitted from the power adapter
to the mobile terminal comprises an 8-bit data, the power adapter
transmits the 8-bit data to the mobile terminal via eight
continuous clock periods of the clock signal, level of previous 10
.mu.s of each of the eight continuous clock periods is low level,
and level of latter 500 .mu.s of each of the ten continuous clock
periods is high level; or each reply instruction received from the
mobile terminal by the power adapter comprises a 10-bit data, the
power adapter receives the 10-bit data from the mobile terminal via
ten continuous clock periods of the clock signal, level of previous
500 .mu.s of each of the ten continuous clock periods is high
level, and level of latter 10 .mu.s of each of the ten continuous
clock periods is low level.
[0121] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, during a process of that the power adapter receives
an instruction from the mobile terminal, a minimum value of high
level of the clock signal equals to VDD of the power adapter minus
0.7V; or during the process of that the power adapter receives an
instruction from the mobile terminal, a maximum value of low level
of the clock signal is 0.8V; or during a process of that the power
adapter transmits an instruction to the mobile terminal, the
minimum value of the high level of the clock signal equals to
0.25VDD+0.8V; or during the process of that the power adapter
transmits an instruction to the mobile terminal, a maximum value of
the high level of the clock signal is 4.5V; or, during the process
of that the power adapter transmits an instruction to the mobile
terminal, the maximum value of the low level of the clock signal is
0.15VDD, and the VDD is work voltage of the power adapter, and/or
the VDD is greater than 3.2V and less than 4.5V.
[0122] In combination with the seventh aspect or any of the above
implementation manners, in another implementation manner of the
seventh aspect, after the mobile terminal receives the clock
interrupt signal, holding time of a data of an instruction
transmitted from the power adapter to the mobile terminal is
500.+-.5 .mu.s.
[0123] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the communication control circuit is configured to
receive the first instruction from the power adapter, and the first
instruction is used for querying whether or not the mobile terminal
is to activate the fast charging mode; the communication control
circuit is further configured to transmit the reply instruction
corresponding to the first instruction to the power adapter, and
the reply instruction corresponding to the first instruction is
used for indicating that the mobile terminal agrees to activate the
fast charging mode.
[0124] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the reply instruction corresponding to the first
instruction comprises a plurality of bits, the plurality of bits
comprise a bit used for indicating whether or not the mobile
terminal agrees to activate the fast charging mode, and a bit used
for indicating a path impedance of the mobile terminal, and the
path impedance of the mobile terminal is used for the power adapter
to determine whether or not the USB interface is in good
contact.
[0125] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, a format of the reply instruction corresponding to
the first instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the mobile terminal agrees to
activate the fast charging mode, X=0 indicates that the mobile
terminal disagrees to activate the fast charging mode, and the path
impedance of the mobile terminal equals to YYYYYY*5 m.OMEGA..
[0126] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the first instruction is 10101000 or 0xA8.
[0127] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the reply instruction corresponding to the second
instruction comprises a plurality of bits, the plurality of bits of
the reply instruction corresponding to the second instruction
comprises a bit used for indicating that the current output voltage
of the power adapter is proper, high, or low.
[0128] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, a format of the reply instruction corresponding to
the second instruction is 1010XX0000, X indicates 1 bit, XX=11
indicates that the current output voltage of the power adapter is
proper, XX=10 indicates that the current output voltage of the
power adapter is high, and XX=01 indicates that the current output
voltage of the power adapter is low.
[0129] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the second instruction is 10100100 or 0xA4.
[0130] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the reply instruction corresponding to the third
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the third
instruction comprise a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0131] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, a format of the reply instruction corresponding to
the third instruction is 1010XXXXXX, X indicates 1 bit, and the
maximum charging current which is currently supported by the mobile
terminal equals to 3000+(XXXXXX*250) mA.
[0132] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the third instruction is 10100110 or 0xA6.
[0133] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the reply instruction corresponding to the fourth
instruction comprises a plurality of bits, and the plurality of
bits of the reply instruction corresponding to the fourth
instruction comprise a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0134] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, a format of the reply instruction corresponding to
the fourth instruction is 101XYYYYYY, X indicates 1 bit, and Y
indicates 1 bit, X=1 indicates that the battery is being charged,
and X=0 indicates that the battery is not charged, the current
voltage of the battery equals to 3404+(YYYYYY*16)mV.
[0135] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the fourth instruction is 10100010 or 0xA2.
[0136] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the communication control circuit is further
configured to receive a fifth instruction from the power adapter,
and the fifth instruction is used for informing the mobile terminal
that the USB interface is in poor contact, and informing the mobile
terminal to exit the fast charging mode or activate the fast
charging mode again.
[0137] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the fifth instruction is 10110010 or 0xB2.
[0138] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the communication control circuit is further
configured to execute at least one of following operations when the
power adapter determines that the reply instruction received from
the mobile terminal is not correctly encoded, the following
operations comprises: exciting the fast charging mode, stopping
charging, or redetermining whether or not to activate the fast
charging mode.
[0139] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, an instruction transmitted from the mobile terminal
to the power adapter comprises a plurality of bits, when the mobile
terminal transmits any instruction, the mobile terminal firstly
transmits MSB of a plurality of bits of the any instruction; or an
instruction received from the power adapter by the mobile terminal
comprises a plurality of bits, when the mobile terminal receives an
instruction, the mobile terminal firstly receives MSB of a
plurality of bits of the instruction.
[0140] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the clock signal or clock interrupt signal used in
the communication between the power adapter and the mobile terminal
is provided by the power adapter.
[0141] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, the instruction transmitted from the power adapter
to the mobile terminal comprises a plurality of bits, during a
process of transmitting each of the plurality of bits, the power
adapter firstly transmits each of the plurality of bits, and then
transmits the clock interrupt signal; or the reply instruction
received from the mobile terminal by the power adapter comprises a
plurality of bits, during a process of receiving each of the
plurality of bits, the power adapter firstly transmits the clock
interrupt signal, and then receives each of the plurality of bits
after a preset time interval.
[0142] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, each instruction transmitted from the power adapter
to the mobile terminal comprises an 8-bit data, the power adapter
transmits the 8-bit data to the mobile terminal via eight
continuous clock periods of the clock signal, level of previous 10
.mu.s of each of the eight continuous clock periods is low level,
and level of latter 500 .mu.s of each of the eight continuous clock
periods is high level; or each reply instruction received from the
mobile terminal by the power adapter comprises a 10-bit data, the
power adapter receives the 10-bit data from the mobile terminal via
ten continuous clock periods of the clock signal, level of previous
500 .mu.s of each of the ten continuous clock periods is high
level, and level of latter 10 .mu.s of each of the ten continuous
clock periods is low level.
[0143] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, during a process of that the power adapter receives
an instruction from the mobile terminal, a minimum value of high
level of the clock signal equals to VDD of the power adapter minus
0.7V; or during the process of that the power adapter receives an
instruction from the mobile terminal, a maximum value of low level
of the clock signal is 0.8V; or during a process of that the power
adapter transmits an instruction to the mobile terminal, the
minimum value of the high level of the clock signal equals to
0.25VDD+0.8V; or during the process of that the power adapter
transmits an instruction to the mobile terminal, a maximum value of
the high level of the clock signal is 4.5V; or, during the process
of that the power adapter transmits an instruction to the mobile
terminal, the maximum value of the low level of the clock signal is
0.15VDD, and the VDD is work voltage of the power adapter, and/or
the VDD is greater than 3.2V and less than 4.5V.
[0144] In combination with the eighth aspect or any of the above
implementation manners, in another implementation manner of the
eighth aspect, after the mobile terminal receives the clock
interrupt signal, holding time of a data of an instruction
transmitted from the power adapter to the mobile terminal is
500.+-.5 .mu.s.
[0145] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0146] In combination with the sixth aspect or any of the above
implementation manners, in another implementation manner of the
sixth aspect, after the mobile terminal receives the clock
interrupt signal, holding time of a data of an instruction
transmitted from the power adapter to the mobile terminal is
500.+-.5 .mu.s.
[0147] The technical solution of embodiments of the present
disclosure will be described clearly and completely in combination
with the accompanying drawings of the embodiments of the present
disclosure. Obviously, the described embodiments are a part of
embodiments of the present disclosure, and not all of the
embodiments. According to the embodiments of the present
disclosure, other embodiments obtained by those skilled in the art
without creative work all fall within the protection scope of the
present disclosure.
[0148] FIG. 1 is a schematic flow chart of a fast charging method
(also called as quick charging method) in accordance with an
exemplary embodiment of the present disclosure. The method is
applied to a power adapter. The power adapter is coupled to a
mobile terminal via a universal serial bus (USB) interface. The USB
interface can be a normal USB interface, and can also be a micro
USB interface. A power line of the USB interface is used for the
power adapter to charge the mobile terminal, wherein, the power
line of the USB interface can be a VBus line and/or ground line.
The power adapter supports a normal charging mode and a fast
charging mode (also called as quick charging mode), and a charging
current corresponding to the fast charging mode is greater than a
charging current corresponding to the normal charging mode. For
example, the charging current corresponding to the normal charging
mode is generally less than 2.5 A, and the charging current
corresponding to the fast charging mode can be greater than 3
A.
[0149] The method of FIG. 1 includes the following.
[0150] 110, the power adapter transmits clock signal to the mobile
terminal via a first data line of the USB interface in a process of
that the power adapter is coupled to the mobile terminal, and the
clock signal is used to indicate a communication sequence between
the power adapter and the mobile terminal.
[0151] It should be understood that the power adapter actively
transmits the clock signal to the mobile terminal, and keeps
transmission of the clock signal during the whole process of that
the power adapter is coupled to the mobile terminal.
[0152] 120, the power adapter conducts a bidirectional
communication with the mobile terminal via a second data line of
the USB interface under control of the communication sequence, so
as to determine to charge the mobile terminal in the fast charging
mode.
[0153] 130, the power adapter adjusts a charging current of the
power adapter to be the charging current corresponding to the fast
charging mode to charge the mobile terminal.
[0154] Specifically, the power adapter can record the charging
current corresponding to the fast charging mode in advance. When it
is determined that the fast charging mode is adopted to charge the
mobile terminal, the charging current is directly adjusted to the
charging current corresponding to the fast charging mode. Or, the
power adapter can negotiate with the mobile terminal via the
bidirectional communication to determine the charging current
corresponding to the fast charging mode. After negotiation, the
charging current is adjusted.
[0155] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0156] Optionally, in an embodiment, the communication sequence
includes instruction transmission time slots of the power adapter
and instruction reception time slots of the power adapter, and the
instruction transmission time slots and the instruction reception
time slots are alternatively generated. Conducting, by the power
adapter, a bidirectional communication with the mobile terminal via
a second data line of the USB interface under control of the
communication sequence to determine to charge the mobile terminal
in the fast charging mode includes: transmitting, by the power
adapter, a first instruction to the mobile terminal via the second
data line during the instruction transmission time slot of the
power adapter, wherein the first instruction is used to query the
mobile terminal for whether or not to activate the fast charging
mode; receiving, by the power adapter, a reply instruction
corresponding to the first instruction via the second data line
during the instruction reception time slot of the power adapter,
wherein the reply instruction corresponding to the first
instruction is used for indicating that the mobile terminal agrees
to activate the fast charging mode; and determining, by the power
adapter, to charge the mobile terminal in the fast charging mode
according to the reply instruction corresponding to the first
instruction.
[0157] Optionally, in an embodiment, the instruction transmission
time slot of the power adapter includes a number of clock periods,
wherein each clock period is used for transmitting a 1-bit
data.
[0158] Optionally, in an embodiment, the instruction transmission
time slot of the power adapter includes eight clock periods, and
the first instruction includes an 8-bit data.
[0159] Optionally, in an embodiment, the instruction reception time
slot of the power adapter includes a number of clock periods,
wherein each clock period is used for receiving 1-bit data.
[0160] Optionally, in an embodiment, the instruction reception time
slot of the power adapter includes ten clock periods, and the reply
instruction corresponding to the first instruction includes a
10-bit data.
[0161] Optionally, in an embodiment, wherein the first instruction
is an instruction of the fast charging communication instruction
set of the power adapter, and instructions of the fast charging
communication instruction set have the same previous n bits.
[0162] Optionally, in an embodiment, each clock period of the clock
signal includes a low level of 10 us and a high level of 500
us.
[0163] Optionally, in an embodiment, the first data line is a D+
data line of the USB interface, and the second data line is a D-
data line of the USB interface.
[0164] The above specifically describes the fast charging method of
the embodiments of the present disclosure executed by the power
adapter in combination with FIG. 1. The following will specifically
describes the fast charging method of the embodiments of the
present disclosure executed by the mobile terminal in combination
with FIG. 2.
[0165] It can be understood that interaction and relevance
properties and functions of the power adapter and the mobile
terminal described in the fast charging method executed by the
mobile terminal corresponds to the description of the fast charging
method executed by the power adapter. For simplicity, repeated
description will be omitted appropriately.
[0166] FIG. 2 is a schematic flow chart of a fast charging method
in accordance with an exemplary embodiment of the present
disclosure. The method of FIG. 2 is applied to a mobile terminal.
The mobile terminal is coupled to a power adapter via a USB
interface. A power line of the USB interface is used for the power
adapter to charge the mobile terminal. The mobile terminal supports
a normal charging mode and a fast charging mode, wherein a charging
current corresponding to the fast charging mode is greater than a
charging current corresponding to the normal charging mode. The
method of FIG. 2 includes the following.
[0167] 210, the mobile terminal receives clock signal from the
power adapter via a first data line of the USB interface in a
process of that the mobile terminal is coupled to the power
adapter, and the clock signal is used to indicate a communication
sequence between the mobile terminal and the power adapter.
[0168] 220, the mobile terminal conducts a bidirectional
communication with the power adapter via a second data line of the
USB interface under control of the communication sequence, so as to
cause the power adapter to determine to charge the mobile terminal
in the fast charging mode.
[0169] 230, the mobile terminal receives the charging current
corresponding to the fast charging mode from the power adapter to
charge a battery of the mobile terminal.
[0170] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0171] Optionally, in an embodiment, the communication sequence
includes instruction reception time slots of the mobile terminal
and instruction transmission time slots of the mobile terminal, and
the instruction reception time slots and the instruction reception
time slots are alternatively generated. Conducting, by the mobile
terminal, the bidirectional communication with the power adapter
via a second data line of the USB interface under control of the
communication sequence to cause the power adapter to determine to
charge the mobile terminal in the fast charging mode includes:
receiving, by the mobile terminal, a first instruction from the
power adapter via the second data line during the instruction
reception time slot of the mobile terminal, wherein the first
instruction is used to query the mobile terminal for whether or not
to activate the fast charging mode; transmitting, by the mobile
terminal, a reply instruction corresponding to the first
instruction via the second data line during the instruction
transmission time slot of the mobile terminal, wherein the reply
instruction corresponding to the first instruction is used for
indicating that the mobile terminal agrees to activate the fast
charging mode.
[0172] Optionally, in an embodiment, the instruction reception time
slot of the mobile terminal includes a number of clock periods,
wherein each clock period is used for receiving a 1-bit data.
[0173] Optionally, in an embodiment, the instruction reception time
slot of the mobile terminal includes eight clock periods, and the
first instruction includes an 8-bit data.
[0174] Optionally, in an embodiment, the instruction transmission
time slot of the mobile terminal includes a number of clock
periods, wherein each clock period is used for transmitting 1-bit
data.
[0175] Optionally, in an embodiment, the instruction transmission
time slot of the mobile terminal includes ten clock periods, and
the reply instruction corresponding to the first instruction
includes a 10-bit data.
[0176] Optionally, in an embodiment, wherein the reply instruction
corresponding to the first instruction is an instruction of the
fast charging communication instruction set of the mobile terminal,
and instructions of the fast charging communication instruction set
have the same previous n bits.
[0177] Optionally, in an embodiment, each clock period of the clock
signal includes a low level of 10 us and a high level of 500
us.
[0178] Optionally, in an embodiment, the first data line is a D+
data line of the USB interface, and the second data line is a D-
data line of the USB interface.
[0179] The following will describe embodiments of the present
disclosure more specifically in combination with detailed examples.
It should be noted that examples of FIGS. 3-5 are just used to help
those skilled in the art to understand the embodiments of the
present disclosure, and not used to limit the embodiments of the
present disclosure to detailed values or detailed scenarios which
are shown in the examples. Apparently, those skilled in the art can
make various equivalent modification or change according to the
examples shown in FIGS. 3-5, and such modification or change shall
fall within the scope of the embodiments of the present
disclosure.
[0180] Firstly, the fast charging communication instruction set of
the power adapter and the mobile terminal can be defined. For
example, the fast charging communication instruction set is shown
in the table 1.
TABLE-US-00001 TABLE 1 Fast charging communication instruction set
Instruction 1: requesting for fast charging Power adapter ->
Mobile terminal 10101000 0xA8 Mobile terminal -> Power adapter
101XYYYYYY X: 1 -> Agree 0 -> Disagree, Path impedence =
YYYYYY*5(m.OMEGA.) Instruction 2: querying whether or not voltage
of the power adapter is proper Power adapter -> Mobile terminal
10100100 0xA4 Mobile terminal -> Power adapter 1010XX0000 XX: 11
-> Proper 10 -> High 01 -> Low 00 -> Error Instruction
3: querying for maximum charging current which is currently
supported by the mobile terminal Power adapter -> Mobile
terminal 10100110 0xA6 Mobile terminal -> Power adapter
1010XXXXXX Maximum charging current currently supported by the
mobile terminal = 3000 + (XXXXXX*250)(mA) Instruction 4: querying
for current voltage of a battery of the mobile terminal Power
adapter -> Mobile terminal 10100010 0xA2 Mobile terminal ->
Power adapter 101XYYYYYY X: 1 -> Being charged 0 ->
Uncharged, Battery voltage = 3404 + (YYYYYY*16)(mV) Instruction 5:
informing the mobile terminal that USB connection is poor and fast
charging should be stopped Power adapter -> Mobile terminal
10110010 0xB2 Mobile terminal -> Power adapter NONE
[0181] From table 1, it can be seen that for each communication the
power adapter firstly transmits an 8-bit data, and then the mobile
terminal returns a 10-bit data. When the power adapter transmits a
data, the power adapter can firstly transmit most significant bit
(MSB). Similarly, when the power adapter receives a data, the power
adapter firstly receive MSB. The clock signal for data transmission
and data reception of the power adapter can be provided by the
power adapter.
[0182] When the power adapter transmits a data, the power adapter
transmits each bit of the data before transmitting the clock
interrupt signal, which can guarantee the accuracy of the data
received by the mobile terminal. When the power adapter receives a
data, the power adapter can firstly transmit the clock interrupt
signal, and then receive each bit of the data after a certain time,
which can guarantee the accuracy and reliability of the data
received by the power adapter.
[0183] FIG. 3 is a schematic view showing that the power adapter
implements a data reception and data transmission in accordance
with an exemplary embodiment of the present disclosure. For FIG. 3,
there are a number of methods for parsing a data to determine
whether or not the data is valid. For example, previous n bits of a
data can be defined as 101 in advance. When previous 3 bits of a
data received by the power adapter is not 101, the data is
determined as an invalid data, and communication fails. Or, a
received data is defined to include 10 bits in advance. If a
received data does not include 10 bits, the received data is
determined as an invalid data, and communication fails.
[0184] FIG. 4 is a schematic view of a sequence of that the power
adapter implements a communication in accordance with an exemplary
embodiment of the present disclosure. From FIG. 4, a relationship
between a communication sequence indicated by the clock signal
which is transmitted by the D+ data line and data signal
transmitted by the D- data line. FIG. 5 shows a detailed example.
In FIG. 5, after the power adapter transmits the instruction
10101000 to the mobile terminal, the power adapter receives the
reply instruction 1011001111 from the mobile terminal.
[0185] In combination with FIGS. 1-5, the above specifically
describes the fast charging method of the embodiments of the
present disclosure. In combination with FIGS. 6-7, the following
will specifically describe the power adapter and the mobile
terminal of the embodiments of the present disclosure. It can be
understood that the power adapter of FIG. 6 can implement various
steps executed by the power adapter of FIGS. 1-5, and the mobile
terminal of FIG. 7 can implement various steps executed by the
mobile terminal of FIGS. 1-5. To avoid repetition, detailed
description will be omitted.
[0186] FIG. 6 is a schematic structural diagram of a power adapter
in accordance with an exemplary embodiment of the present
disclosure. A power adapter 600 of FIG. 6 is coupled to a mobile
terminal via a USB interface. A power line of the USB interface is
used for the power adapter 600 to charge the mobile terminal. The
power adapter 600 supports a normal charging mode and a fast
charging mode, and a charging current corresponding to the fast
charging mode is greater than a charging current corresponding to
the normal charging mode. The power adapter 600 includes the
following.
[0187] A communication circuit 610 is configured to transmit clock
signal to the mobile terminal via a first data line of the USB
interface in a process of that the power adapter 600 is coupled to
the mobile terminal, and the clock signal is used to indicate a
communication sequence between the power adapter 600 and the mobile
terminal. The communication circuit 610 is further configured to
conduct a bidirectional communication with the mobile terminal via
a second data line of the USB interface under control of the
communication sequence, so as to determine to charge the mobile
terminal in the fast charging mode.
[0188] A current adjusting circuit 620 is configured to adjust a
charging current of the power adapter to be the charging current
corresponding to the fast charging mode to charge the mobile
terminal.
[0189] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, and the power adapter negotiates with the mobile terminal
via the bidirectional communication with the mobile terminal to
determine whether or not the fast charging mode can be adopted.
Comparing with the present technology, the security of the fast
charging process is improved.
[0190] Optionally, in an embodiment, the communication sequence
includes instruction transmission time slots of the power adapter
600 and instruction reception time slots of the power adapter 600,
and the instruction transmission time slots and the instruction
reception time slots are alternatively generated. The communication
circuit 610 is configured to transmit a first instruction to the
mobile terminal via the second data line during the instruction
transmission time slot of the power adapter 600, and the first
instruction is used to query the mobile terminal for whether or not
to activate the fast charging mode. The communication circuit 610
is further configured to receive a reply instruction corresponding
to the first instruction via the second data line during the
instruction reception time slot of the power adapter 600, and the
reply instruction corresponding to the first instruction is used
for indicating that the mobile terminal agrees to activate the fast
charging mode. The communication circuit 610 is further configured
to determine to charge the mobile terminal in the fast charging
mode according to the reply instruction corresponding to the first
instruction.
[0191] Optionally, in an embodiment, the instruction transmission
time slot of the power adapter 600 includes a number of clock
periods, wherein each clock period is used for transmitting a 1-bit
data.
[0192] Optionally, in an embodiment, the instruction transmission
time slot of the power adapter 600 includes eight clock periods,
and the first instruction includes an 8-bit data.
[0193] Optionally, in an embodiment, the instruction reception time
slot of the power adapter 600 includes a number of clock periods,
wherein each clock period is used for receiving a 1-bit data.
[0194] Optionally, in an embodiment, the instruction reception time
slot of the power adapter 600 includes ten clock periods, and the
reply instruction corresponding to the first instruction includes a
10-bit data.
[0195] Optionally, in an embodiment, the first instruction is an
instruction of the fast charging communication instruction set of
the power adapter 600, and instructions of the fast charging
communication instruction set have the same previous n bits.
[0196] Optionally, in an embodiment, each clock period of the clock
signal includes a low level of 10 us and a high level of 500
us.
[0197] Optionally, in an embodiment, the first data line is a D+
data line of the USB interface, and the second data line is a D-
data line of the USB interface.
[0198] FIG. 7 is a schematic block diagram of a mobile terminal in
accordance with an exemplary embodiment of the present disclosure.
A mobile terminal 700 of FIG. 7 is coupled to a power adapter via a
USB interface. A power line of the USB interface is used for the
power adapter to charge the mobile terminal 700. The mobile
terminal 700 supports a normal charging mode and a fast charging
mode, and a charging current corresponding to the fast charging
mode is greater than that corresponding to the normal charging
mode. The mobile terminal 700 includes the following.
[0199] A communication circuit 710 is configured to receive clock
signal from the power adapter via a first data line of the USB
interface in a process of that the mobile terminal 700 is coupled
to the power adapter, and the clock signal is used to indicate a
communication sequence between the mobile terminal 700 and the
power adapter. The communication circuit 710 is further configured
to conduct a bidirectional communication with the power adapter via
a second data line of the USB interface under control of the
communication sequence, so as to cause the power adapter to
determine to charge the mobile terminal 700 in the fast charging
mode.
[0200] A charging circuit 720 is configured to receive the charging
current corresponding to the fast charging mode from the power
adapter to charge a battery of the mobile terminal 700.
[0201] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0202] Optionally, in an embodiment, the communication sequence
includes instruction reception time slots of the mobile terminal
and instruction transmission time slots of the mobile terminal, and
the instruction reception time slots and the instruction
transmission time slots are alternatively generated. The
communication circuit 710 is configured to receive a first
instruction from the power adapter via the second data line during
the instruction reception time slot of the mobile terminal 700, and
the first instruction is used to query the mobile terminal for
whether or not to activate the fast charging mode. The
communication circuit 710 is further configured to transmit a reply
instruction corresponding to the first instruction to the power
adapter via the second data line during the instruction
transmission time slot of the mobile terminal 700, and the reply
instruction corresponding to the first instruction is used for
indicating that the mobile terminal 700 agrees to activate the fast
charging mode.
[0203] Optionally, in an embodiment, the instruction reception time
slot of the mobile terminal 700 includes a number of clock periods,
and each clock period is used for receiving a 1-bit data.
[0204] Optionally, in an embodiment, the instruction reception time
slot of the mobile terminal 700 includes eight clock periods, and
the first instruction includes an 8-bit data.
[0205] Optionally, in an embodiment, the instruction transmission
time slot of the mobile terminal 700 includes a number of clock
periods, and each clock period is used for transmitting a 1-bit
data.
[0206] Optionally, in an embodiment, the instruction transmission
time slot of the mobile terminal 700 includes ten clock periods,
and the reply instruction corresponding to the first instruction
includes a 10-bit data.
[0207] Optionally, in an embodiment, wherein the reply instruction
corresponding to the first instruction is an instruction of the
fast charging communication instruction set of the mobile terminal
700, and instructions of the fast charging communication
instruction set have the same previous n bits.
[0208] Optionally, in an embodiment, each clock period of the clock
signal includes a low level of 10 us and a high level of 500
us.
[0209] Optionally, in an embodiment, the first data line is a D+
data line of the USB interface, and the second data line is a D-
data line of the USB interface.
[0210] FIG. 8 is a schematic flow chart of a fast charging method
in accordance with an exemplary embodiment of the present
disclosure. The method of FIG. 8 can be applied to a power adapter.
The power adapter is coupled to a mobile terminal via a USB
interface. A power line of the USB interface is used for the power
adapter to charge the mobile terminal. Data lines of the USB
interface are used for a bidirectional communication between the
power adapter and the mobile terminal. The power adapter supports a
normal charging mode and a fast charging mode, and a charging
current corresponding to the fast charging mode is greater than a
charging current corresponding to the normal charging mode. The
method of FIG. 8 includes the following.
[0211] 802, the power adapter determines to activate the fast
charging mode.
[0212] 804, the power adapter transmits a second instruction to the
mobile terminal, and the second instruction is used for querying
whether or not current output voltage of the power adapter can be
determined as a charging voltage corresponding to the fast charging
mode.
[0213] 806, the power adapter receives a reply instruction
corresponding to the second instruction from the mobile terminal,
and the reply instruction corresponding to the second instruction
is used for indicating that the current output voltage of the power
adapter is proper, high, or low.
[0214] 808, the power adapter adjusts the output voltage of the
power adapter to be the charging voltage corresponding to the fast
charging mode according to the reply instruction corresponding to
the second instruction.
[0215] 810, the power adapter transmits a third instruction to the
mobile terminal, and the third instruction is used for querying
maximum charging current which is currently supported by the mobile
terminal.
[0216] 812, the power adapter receives a reply instruction
corresponding to the third instruction from the mobile terminal,
and the reply instruction corresponding to the third instruction is
used for indicating the maximum charging current which is currently
supported by the mobile terminal.
[0217] 814, the power adapter determines the charging current
corresponding to the fast charging mode according to the reply
instruction corresponding to the third instruction.
[0218] 818, the power adapter adjusts an output current of the
power adapter to be the charging current corresponding to the fast
charging mode to enter a constant current phase.
[0219] 820, the power adapter transmits a fourth instruction to the
mobile terminal during the constant current phase, and the fourth
instruction is used for querying current voltage of a battery of
the mobile terminal.
[0220] 822, the power adapter receives a reply instruction
corresponding to the fourth instruction from the mobile terminal,
and the reply instruction corresponding to the fourth instruction
is used for indicating the current voltage of the battery of the
mobile terminal.
[0221] 824, the power adapter adjusts the output current of the
power adapter according to the current voltage of the battery, so
as to charge the mobile terminal in a multi-stage constant current
mode.
[0222] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0223] Optionally, in an embodiment, determining to activate the
fast charging mode by the power adapter includes: transmitting, by
the power adapter, a first instruction to the mobile terminal,
wherein the first instruction is used for querying whether or not
the mobile terminal is to activate the fast charging mode;
receiving, by the power adapter, a reply instruction corresponding
to the first instruction from the mobile terminal, wherein the
reply instruction corresponding to the first instruction is used
for indicating that the mobile terminal agrees to activate the fast
charging mode; determining, by the power adapter, to activate the
fast charging mode according to the reply instruction corresponding
to the first instruction.
[0224] Optionally, in an embodiment, the reply instruction
corresponding to the first instruction includes a number of bits.
The bits include a bit used for indicating whether or not the
mobile terminal agrees to activate the fast charging mode, and a
bit used for indicating a path impedance of the mobile terminal.
The path impedance of the mobile terminal is used for the power
adapter to determine whether or not the USB interface is in good
contact.
[0225] Optionally, in an embodiment, a format of the reply
instruction corresponding to the first instruction is 101XYYYYYY,
wherein X indicates 1 bit, and Y indicates 1 bit. X=1 indicates
that the mobile terminal agrees to activate the fast charging mode,
X=0 indicates that the mobile terminal does not agree to activate
the fast charging mode, and the path impedance of the mobile
terminal equals to YYYYYY*5 m.OMEGA..
[0226] Optionally, in an embodiment, the first instruction is
10101000 or 0xA8.
[0227] Optionally, in an embodiment, the reply instruction
corresponding to the second instruction includes a number of bits.
The bits of the reply instruction corresponding to the second
instruction include a bit used for indicating that the current
output voltage of the power adapter is proper, high, or low.
[0228] Optionally, in an embodiment, a format of the reply
instruction corresponding to the second instruction is 1010XX0000,
wherein X indicates 1 bit, XX=11 indicates that the current output
voltage of the power adapter is proper, XX=10 indicates that the
current output voltage of the power adapter is high, XX=01
indicates that the current output voltage of the power adapter is
low.
[0229] Optionally, in an embodiment, the second instruction is
10100100 or 0xA4.
[0230] Optionally, in an embodiment, the reply instruction
corresponding to the third instruction includes a number bits, and
the bits of the reply instruction corresponding to the third
instruction include a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0231] Optionally, in an embodiment, a format of the reply
instruction corresponding to the third instruction is 1010 XXXXXX,
and X indicates 1 bit. The maximum charging current which is
currently supported by the mobile terminal equals to
3000+(XXXXXX*250)mA.
[0232] Optionally, in an embodiment, the third instruction is
10100110 or 0xA6.
[0233] Optionally, in an embodiment, the reply instruction
corresponding to the fourth instruction includes a number of bits,
and the bits of the reply instruction corresponding to the fourth
instruction include a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0234] Optionally, in an embodiment, a format of the reply
instruction corresponding to the fourth instruction is 101XYYYYYY,
X indicates 1 bit, and Y indicates 1 bit. X=1 indicates that the
battery is being charged, and X=0 indicates that the battery is not
charged. The current voltage of the battery equals to
3404+(YYYYYY*16)mV.
[0235] Optionally, in an embodiment, the fourth instruction is
10100010 or 0xA2.
[0236] Optionally, in an embodiment, the method of FIG. 8 can
further include: determining, by the power adapter, that the USB
interface is in poor contact; and transmitting, by the power
adapter, a fifth instruction to the mobile terminal, wherein the
fifth instruction is used for informing the mobile terminal that
the USB interface is in poor contact, and informing the mobile
terminal to exit the fast charging mode or redetermine whether or
not to activate the fast charging mode.
[0237] Optionally, in an embodiment, the fifth instruction is
10110010 or 0xB2.
[0238] Optionally, in an embodiment, the method of FIG. 8 can
further include: executing, by the power adapter, at least one of
following operations when the power adapter determines that the
reply instruction received from the mobile terminal is not
correctly encoded, wherein the following operations includes:
exciting the fast charging mode, stopping charging, or
redetermining whether or not to activate the fast charging
mode.
[0239] Optionally, in an embodiment, an instruction transmitted
from the power adapter to the mobile terminal includes a number of
bits. When the power adapter transmits any instruction, the power
adapter firstly transmits MSB of the multiple bits of the any
instruction. Or, an instruction received from the mobile terminal
by the power adapter includes a number of bits. When the power
adapter receives a certain instruction, the power adapter firstly
receives MSB of the multiple bits of the certain instruction.
[0240] Optionally, in an embodiment, the clock signal or clock
interrupt signal used in the communication between the power
adapter and the mobile terminal is provided by the power
adapter.
[0241] Optionally, in an embodiment, the instruction transmitted
from the power adapter to the mobile terminal includes multiple
bits. During a process of transmitting each of the multiple bits,
the power adapter firstly transmits each bit, and then transmits
the clock interrupt signal. Or, the reply instruction received from
the mobile terminal by the power adapter includes multiple bits.
During a process of receiving each of the multiple bits, the power
adapter firstly transmits the clock interrupt signal, and then
receives each bit after a preset time interval.
[0242] Optionally, in an embodiment, each instruction transmitted
from the power adapter to the mobile terminal includes an 8-bit
data. The power adapter transmits the 8-bit data to the mobile
terminal via eight continuous clock periods of the clock signal.
Level of previous 10 .mu.s of each of the eight continuous clock
periods is low level, and level of latter 500 .mu.s of each of the
eight continuous clock periods is high level. Or, each reply
instruction received from the mobile terminal by the power adapter
includes a 10-bit data. The power adapter receives the 10-bit data
from the mobile terminal via ten continuous clock periods of the
clock signal. Level of previous 500 .mu.s of each of the ten
continuous clock periods is high level, and level of latter 10
.mu.s is low level.
[0243] Optionally, in an embodiment, during a process of that the
power adapter receives an instruction from the mobile terminal, a
minimum value of high level of the clock signal equals to VDD of
the power adapter minus 0.7V. Or, during the process of that the
power adapter receives an instruction from the mobile terminal, a
maximum value of low level of the clock signal is 0.8V. Or, during
a process of that the power adapter transmits an instruction to the
mobile terminal, the minimum value of the high level of the clock
signal equals to 0.25VDD+0.8V. Or, during the process of that the
power adapter transmits an instruction to the mobile terminal, a
maximum value of the high level of the clock signal is 4.5V. Or,
during the process of that the power adapter transmits an
instruction to the mobile terminal, the maximum value of the low
level of the clock signal is 0.15VDD. The VDD is work voltage of
the power adapter, and/or the VDD is greater than 3.2V and less
than 4.5V.
[0244] Optionally, in an embodiment, after the mobile terminal
receives the clock interrupt signal, holding time of a data of an
instruction transmitted from the power adapter to the mobile
terminal is 500.+-.5 .mu.s.
[0245] FIG. 9 is a schematic flow chart of a fast charging method
in accordance with an exemplary embodiment of the present
disclosure. The method of FIG. 9 can be applied to a mobile
terminal. The mobile terminal is coupled to a power adapter via a
USB interface. A power line of the USB interface is used to charge
the mobile terminal. Data lines of the USB interface are used for a
bidirectional communication between the mobile terminal and the
power adapter. The mobile terminal supports a normal charging mode
and a fast charging mode, and a charging current corresponding to
the fast charging mode is greater than a charging current
corresponding to the normal charging mode. The method of FIG. 9
includes the following.
[0246] 910, the mobile terminal determines to activate the fast
charging mode.
[0247] 920, the mobile terminal receives a second instruction from
the power adapter, and the second instruction is used for querying
whether or not a current output voltage of the power adapter is
proper to be a charging voltage corresponding to the fast charging
mode.
[0248] 930, the mobile terminal transmits a reply instruction
corresponding to the second instruction to the power adapter, and
the reply instruction corresponding to the second instruction is
used for indicating that the current output voltage of the power
adapter is proper, high, or low, so as to cause the power adapter
to adjust the current output voltage of the power adapter to be the
charging voltage corresponding to the fast charging mode according
to the reply instruction corresponding to the second
instruction.
[0249] 940, the mobile terminal receives a third instruction from
the power adapter, and the third instruction is used for querying
maximum charging current which is currently supported by the mobile
terminal.
[0250] 950, the mobile terminal transmits a reply instruction
corresponding to the third instruction to the power adapter, and
the reply instruction corresponding to the third instruction is
used for indicating the maximum charging current which is currently
supported by the mobile terminal, so as to cause the power adapter
to determine the charging current corresponding to the fast
charging mode according to the reply instruction corresponding to
the third instruction.
[0251] 960, the mobile terminal receives a fourth instruction from
the power adapter after the power adapter adjusts an output current
of the power adapter to be the charging current corresponding to
the fast charging mode and enters a constant current phase, and the
fourth instruction is used for querying current voltage of a
battery of the mobile terminal.
[0252] 970, the mobile terminal transmits a reply instruction
corresponding to the fourth instruction to the power adapter, and
the reply instruction corresponding to the fourth instruction is
used for indicating the current voltage of the battery of the
mobile terminal, so as to cause the power adapter to adjust the
output current of the power adapter according to the current
voltage of the battery to charge the mobile terminal in a
multi-stage constant current mode.
[0253] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0254] Optionally, in an embodiment, determining to activate the
fast charging mode by the mobile terminal includes: receiving, by
the mobile terminal, a first instruction from the power adapter,
wherein the first instruction is used for querying whether or not
the mobile terminal is to activate the fast charging mode; and
transmitting, by the mobile terminal, a reply instruction
corresponding to the first instruction to the power adapter,
wherein the reply instruction corresponding to the first
instruction is used for indicating that the mobile terminal agrees
to activate the fast charging mode.
[0255] Optionally, in an embodiment, the reply instruction
corresponding to the first instruction includes a number of bits.
The bits include a bit used for indicating whether or not the
mobile terminal agrees to activate the fast charging mode, and a
bit used for indicating a path impedance of the mobile terminal.
The path impedance of the mobile terminal is used for the power
adapter to determine whether or not the USB interface is in good
contact.
[0256] Optionally, in an embodiment, a format of the reply
instruction corresponding to the first instruction is 101XYYYYYY, X
indicates 1 bit, and Y indicates 1 bit. X=1 indicates that the
mobile terminal agrees to activate the fast charging mode, and X=0
indicates that the mobile terminal disagrees to activate the fast
charging mode. The path impedance of the mobile terminal equals to
YYYYYY*5 m.OMEGA..
[0257] Optionally, in an embodiment, the first instruction is
10101000 or 0xA8.
[0258] Optionally, in an embodiment, the reply instruction
corresponding to the second instruction includes a number of bits.
The bits of the reply instruction corresponding to the second
instruction include a bit used for indicating that the current
output voltage of the power adapter is proper, high, or low.
[0259] Optionally, in an embodiment, a format of the reply
instruction corresponding to the second instruction is 1010XX0000.
X indicates 1 bit, XX=11 indicates that the current output voltage
of the power adapter is proper, XX=10 indicates that the current
output voltage of the power adapter is high, and XX=01 indicates
that the current output voltage of the power adapter is low.
[0260] Optionally, in an embodiment, the second instruction is
10100100 or 0xA4.
[0261] Optionally, in an embodiment, a reply instruction
corresponding to the third instruction includes a number of bits.
The bits of the reply instruction corresponding to the third
instruction include a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0262] Optionally, in an embodiment, a format of the reply
instruction corresponding to the third instruction is 1010XXXXXX, X
indicates 1 bit, and the maximum charging current which is
currently supported by the mobile terminal equals to
3000+(XXXXXX*250) mA.
[0263] Optionally, in an embodiment, the third instruction is
10100110 or 0xA6.
[0264] Optionally, in an embodiment, the reply instruction
corresponding to the fourth instruction includes a number of bits.
The bits of the reply instruction corresponding to the fourth
instruction include a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0265] Optionally, in an embodiment, a format of the reply
instruction corresponding to the fourth instruction is 101XYYYYYY,
X indicates 1 bit, and Y indicates 1 bit. X=1 indicates that the
battery is being charged, and X=0 indicates that the battery is not
charged. The current voltage of the battery equals to
3404+(YYYYYY*16)mV.
[0266] Optionally, in an embodiment, the fourth instruction is
10100010 or 0xA2.
[0267] Optionally, in an embodiment, the method further includes:
receiving, by the mobile terminal, a fifth instruction from the
power adapter, wherein the fifth instruction is used for informing
the mobile terminal that the USB interface is in poor contact, and
informing the mobile terminal to exit the fast charging mode or
activate the fast charging mode again.
[0268] Optionally, in an embodiment, the fifth instruction is
10110010 or 0xB2.
[0269] Optionally, in an embodiment, the method of FIG. 9 can
further include: executing, by the mobile terminal, at least one of
following operations when the power adapter determines that the
reply instruction received from the mobile terminal is not
correctly encoded. The following operations include: exciting the
fast charging mode, stopping charging, or redetermining whether or
not to activate the fast charging mode.
[0270] Optionally, in an embodiment, an instruction transmitted
from the mobile terminal to the power adapter includes a number of
bits, and when the mobile terminal transmits any instruction, the
mobile terminal firstly transmits MSB of a number of bits of the
any instruction. Or an instruction received from the power adapter
by the mobile terminal includes a number of bits, and when the
mobile terminal receives an instruction, the mobile terminal
firstly receives MSB of a number of bits of the instruction.
[0271] Optionally, in an embodiment, the clock signal or clock
interrupt signal used in the communication between the power
adapter and the mobile terminal is provided by the power
adapter.
[0272] Optionally, in an embodiment, the instruction transmitted
from the power adapter to the mobile terminal includes a number of
bits, and during a process of transmitting each of the bits, the
power adapter firstly transmits each bit, and then transmits the
clock interrupt signal. Or the reply instruction received from the
mobile terminal by the power adapter includes a number of bits, and
during a process of receiving each of the bits, the power adapter
firstly transmits the clock interrupt signal, and then receives
each bit after a preset time interval.
[0273] Optionally, in an embodiment, each instruction transmitted
from the power adapter to the mobile terminal includes an 8-bit
data, and the power adapter transmits the 8-bit data to the mobile
terminal via eight continuous clock periods of the clock signal.
Level of previous 10 .mu.s of each of the eight continuous clock
periods is low level, and level of latter 500 .mu.s of each of the
eight continuous clock periods is high level. Or each reply
instruction received from the mobile terminal by the power adapter
includes a 10-bit data, and the power adapter receives the 10-bit
data from the mobile terminal via ten continuous clock periods of
the clock signal. Level of previous 500 .mu.s of each of the ten
continuous clock periods is high level, and level of latter 10
.mu.s of each of the ten continuous clock periods is low level.
[0274] Optionally, in an embodiment, during a process of that the
power adapter receives an instruction from the mobile terminal, a
minimum value of high level of the clock signal equals to VDD of
the power adapter minus 0.7V. Or during the process of that the
power adapter receives an instruction from the mobile terminal, a
maximum value of low level of the clock signal is 0.8V. Or during a
process of that the power adapter transmits an instruction to the
mobile terminal, the minimum value of the high level of the clock
signal equals to 0.25VDD+0.8V. Or during the process of that the
power adapter transmits an instruction to the mobile terminal, a
maximum value of the high level of the clock signal is 4.5V. Or,
during the process of that the power adapter transmits an
instruction to the mobile terminal, the maximum value of the low
level of the clock signal is 0.15VDD, and the VDD is work voltage
of the power adapter, and/or the VDD is greater than 3.2V and less
than 4.5V.
[0275] Optionally, in an embodiment, after the mobile terminal
receives the clock interrupt signal, holding time of a data of an
instruction transmitted from the power adapter to the mobile
terminal is 500.+-.5 .mu.s.
[0276] In combination with FIGS. 8-9, the above specifically
describes the fast charging method of the embodiments of the
present disclosure. In combination with FIGS. 10-11, the following
will specifically describe the power adapter and the mobile
terminal of the embodiments of the present disclosure. It can be
understood that a power adapter of FIG. 10 can implement various
steps executed by the power adapter of FIG. 8, and a mobile
terminal of FIG. 11 can implement various steps executed by the
mobile terminal of FIG. 9. For simplicity, repeated description can
be appropriately omitted.
[0277] FIG. 10 is a schematic block diagram of a power adapter in
accordance with an exemplary embodiment of the present disclosure.
A power adapter 1000 of FIG. 10 is coupled to a mobile terminal via
a USB interface. A power line of the USB interface is used for the
power adapter 1000 to charge the mobile terminal. Data lines of the
USB interface are used for a bidirectional communication between
the power adapter 1000 and the mobile terminal. The power adapter
1000 supports a normal charging mode and a fast charging mode, and
a charging current corresponding to the fast charging mode is
greater than a charging current corresponding to the normal
charging mode. The power adapter 1000 includes a communication
control circuit 1010 and a charging circuit 1020.
[0278] The communication control circuit 1010 is configured to
determine to activate the fast charging mode, and transmit a second
instruction to the mobile terminal, wherein the second instruction
is used for querying whether or not current output voltage of the
power adapter 1000 can be determined as charging voltage
corresponding to the fast charging mode. The communication control
circuit 1010 is further configured to receive a reply instruction
corresponding to the second instruction from the mobile terminal,
and the reply instruction corresponding to the second instruction
is used for indicating that the current output voltage of the power
adapter is proper, high, or low. The communication control circuit
1010 is further configured to adjust the output voltage of the
power adapter to be the charging voltage corresponding to the fast
charging mode according to the reply instruction corresponding to
the second instruction, and transmit a third instruction to the
mobile terminal, wherein the third instruction is used for querying
maximum charging current which is currently supported by the mobile
terminal. The communication control circuit 1010 is further
configured to receive a reply instruction corresponding to the
third instruction from the mobile terminal, and the reply
instruction corresponding to the third instruction is used for
indicating the maximum charging current which is currently
supported by the mobile terminal. The communication control circuit
1010 is further configured to determine the charging current
corresponding to the fast charging mode according to the reply
instruction corresponding to the third instruction, adjust the
output current to the charging current corresponding to the fast
charging mode to enter a constant current phase, and transmit a
fourth instruction to the mobile terminal during the constant
current phase, wherein the fourth instruction is used for querying
current voltage of a battery of the mobile terminal. The
communication control circuit 1010 is further configured to receive
a reply instruction corresponding to the fourth instruction from
the mobile terminal, and the reply instruction corresponding to the
fourth instruction is used for indicating the current voltage of
the battery of the mobile terminal. The communication control
circuit 1010 is further configured to adjust the output current of
the power adapter according to the current voltage of the battery,
so as to charge the mobile terminal in a multi-stage constant
current mode via the charging circuit 1020.
[0279] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0280] Optionally, in an embodiment, the communication control
circuit 1010 is configured to transmit a first instruction to the
mobile terminal, and the first instruction is used for querying
whether or not the mobile terminal is to activate the fast charging
mode. The communication control circuit 1010 is further configured
to receive a reply instruction corresponding to the first
instruction from the mobile terminal, and the reply instruction
corresponding to the first instruction is used for indicating that
the mobile terminal agrees to activate the fast charging mode. The
communication control circuit 1010 is further configured to
determine to activate the fast charging mode according to the reply
instruction corresponding to the first instruction.
[0281] Optionally, in an embodiment, the reply instruction
corresponding to the first instruction includes a number of bits.
The bits include a bit used for indicating whether or not the
mobile terminal agrees to activate the fast charging mode, and a
bit used for indicating a path impedance of the mobile terminal.
The path impedance of the mobile terminal is used for the power
adapter to determine whether or not the USB interface is in good
contact.
[0282] Optionally, in an embodiment, a format of the reply
instruction corresponding to the first instruction is 101XYYYYYY, X
indicates 1 bit, and Y indicates 1 bit. X=1 indicates that the
mobile terminal agrees to activate the fast charging mode, X=0
indicates that the mobile terminal does not agree to activate the
fast charging mode, and the path impedance of the mobile terminal
equals to YYYYYY*5 m.OMEGA..
[0283] Optionally, in an embodiment, the first instruction is
10101000 or 0xA8.
[0284] Optionally, in an embodiment, the reply instruction
corresponding to the second instruction includes a number of bits.
The bits of the reply instruction corresponding to the second
instruction include a bit used for indicating that the current
output voltage of the power adapter is proper, high, or low.
[0285] Optionally, in an embodiment, a format of the reply
instruction corresponding to the second instruction is 1010XX0000,
wherein X indicates 1 bit, XX=11 indicates that the current output
voltage of the power adapter is proper, XX=10 indicates that the
current output voltage of the power adapter is high, XX=01
indicates that the current output voltage of the power adapter is
low.
[0286] Optionally, in an embodiment, the second instruction is
10100100 or 0xA4.
[0287] Optionally, in an embodiment, the reply instruction
corresponding to the third instruction includes a number bits, and
the bits of the reply instruction corresponding to the third
instruction include a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0288] Optionally, in an embodiment, a format of the reply
instruction corresponding to the third instruction is 1010XXXXXX,
and X indicates 1 bit. The maximum charging current which is
currently supported by the mobile terminal equals to
3000+(XXXXXX*250)mA.
[0289] Optionally, in an embodiment, the third instruction is
10100110 or 0xA6.
[0290] Optionally, in an embodiment, the reply instruction
corresponding to the fourth instruction includes a number of bits,
and the bits of the reply instruction corresponding to the fourth
instruction include a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0291] Optionally, in an embodiment, a format of the reply
instruction corresponding to the fourth instruction is 101XYYYYYY,
X indicates 1 bit, and Y indicates 1 bit. X=1 indicates that the
battery is being charged, and X=0 indicates that the battery is not
charged. The current voltage of the battery equals to
3404+(YYYYYY*16)mV.
[0292] Optionally, in an embodiment, the fourth instruction is
10100010 or 0xA2.
[0293] Optionally, in an embodiment, the communication control
circuit 1010 is further configured to determine that the USB
interface is in poor contact, and transmit a fifth instruction to
the mobile terminal. The fifth instruction is used for informing
the mobile terminal that the USB interface is in poor contact, and
informing the mobile terminal to exit the fast charging mode or
redetermine whether or not to activate the fast charging mode.
[0294] Optionally, in an embodiment, the fifth instruction is
10110010 or 0xB2.
[0295] Optionally, in an embodiment, the communication control
circuit 1010 is further configured to execute at least one of
following operations when the power adapter determines that the
reply instruction received from the mobile terminal is not
correctly encoded. The following operations include: exciting the
fast charging mode, stopping charging, or redetermining whether or
not to activate the fast charging mode.
[0296] Optionally, in an embodiment, an instruction transmitted
from the power adapter to the mobile terminal includes a number of
bits. When the power adapter transmits any instruction, the power
adapter firstly transmits MSB of the multiple bits of the any
instruction. Or, an instruction received from the mobile terminal
by the power adapter includes a number of bits. When the power
adapter receives a certain instruction, the power adapter firstly
receives MSB of the multiple bits of the certain instruction.
[0297] Optionally, in an embodiment, the clock signal or clock
interrupt signal used in the communication between the power
adapter and the mobile terminal is provided by the power
adapter.
[0298] Optionally, in an embodiment, the instruction transmitted
from the power adapter to the mobile terminal includes multiple
bits. During a process of transmitting each of the multiple bits,
the power adapter firstly transmits each bit, and then transmits
the clock interrupt signal. Or, the reply instruction received from
the mobile terminal by the power adapter includes multiple bits.
During a process of receiving each of the multiple bits, the power
adapter firstly transmits the clock interrupt signal, and then
receives each bit after a preset time interval.
[0299] Optionally, in an embodiment, each instruction transmitted
from the power adapter to the mobile terminal includes an 8-bit
data. The power adapter transmits the 8-bit data to the mobile
terminal via eight continuous clock periods of the clock signal.
Level of previous 10 .mu.s of each of the eight continuous clock
periods is low level, and level of latter 500 .mu.s of each of the
eight continuous clock periods is high level. Or, each reply
instruction received from the mobile terminal by the power adapter
includes a 10-bit data. The power adapter receives the 10-bit data
from the mobile terminal via ten continuous clock periods of the
clock signal. Level of previous 500 .mu.s of each of the ten
continuous clock periods is high level, and level of latter 10
.mu.s is low level.
[0300] Optionally, in an embodiment, during a process of that the
power adapter receives an instruction from the mobile terminal, a
minimum value of high level of the clock signal equals to VDD of
the power adapter minus 0.7V. Or, during the process of that the
power adapter receives an instruction from the mobile terminal, a
maximum value of low level of the clock signal is 0.8V. Or, during
a process of that the power adapter transmits an instruction to the
mobile terminal, the minimum value of the high level of the clock
signal equals to 0.25VDD+0.8V. Or, during the process of that the
power adapter transmits an instruction to the mobile terminal, a
maximum value of the high level of the clock signal is 4.5V. Or,
during the process of that the power adapter transmits an
instruction to the mobile terminal, the maximum value of the low
level of the clock signal is 0.15VDD. The VDD is work voltage of
the power adapter, and/or the VDD is greater than 3.2V and less
than 4.5V.
[0301] Optionally, in an embodiment, after the mobile terminal
receives the clock interrupt signal, holding time of a data of an
instruction transmitted from the power adapter to the mobile
terminal is 500.+-.5 .mu.s.
[0302] FIG. 11 is a schematic block diagram of a mobile terminal in
accordance with an exemplary embodiment of the present disclosure.
A mobile terminal 1100 of FIG. 11 is coupled to a power adapter via
a USB interface. A power line of the USB interface is used to
charge the mobile terminal 1100. Data lines of the USB interface
are used for a bidirectional communication between the mobile
terminal 1100 and the power adapter. The mobile terminal 1100
supports a normal charging mode and a fast charging mode, and a
charging current corresponding to the fast charging mode is greater
than a charging current corresponding to the normal charging mode.
The mobile terminal 1100 includes a communication control circuit
1110 and a charging circuit 1120.
[0303] The communication control circuit 1110 is configured to
determine to activate the fast charging mode, and receive a second
instruction from the power adapter, wherein the second instruction
is used for querying whether or not a current output voltage of the
power adapter is proper to be a charging voltage corresponding to
the fast charging mode. The communication control circuit 1110 is
further configured to transmit a reply instruction corresponding to
the second instruction to the power adapter, and the reply
instruction corresponding to the second instruction is used for
indicating that the current output voltage of the power adapter is
proper, high, or low, so as to cause the power adapter to adjust
the current output voltage of the power adapter to be the charging
voltage corresponding to the fast charging mode according to the
reply instruction corresponding to the second instruction. The
communication control circuit 1110 is further configured to receive
a third instruction from the power adapter, and the third
instruction is used for querying maximum charging current which is
currently supported by the mobile terminal. The communication
control circuit 1110 is further configured to transmit a reply
instruction corresponding to the third instruction to the power
adapter, and the reply instruction corresponding to the third
instruction is used for indicating the maximum charging current
which is currently supported by the mobile terminal, so as to cause
the power adapter to determine the charging current corresponding
to the fast charging mode according to the reply instruction
corresponding to the third instruction. The communication control
circuit 1110 is further configured to receive a fourth instruction
from the power adapter after the power adapter adjusts output
current to the charging current corresponding to the fast charging
mode and enters a constant current phase, and the fourth
instruction is used for querying current voltage of a battery of
the mobile terminal. The communication control circuit 1110 is
further configured to transmit a reply instruction corresponding to
the fourth instruction to the power adapter, and the reply
instruction corresponding to the fourth instruction is used for
indicating the current voltage of the battery of the mobile
terminal, so as to cause the power adapter to adjust the output
current of the power adapter according to the current voltage of
the battery to charge the mobile terminal in a multi-stage constant
current mode via the charging circuit 1120.
[0304] In embodiments of the present disclosure, the power adapter
does not increase the charging current blindly to implement fast
charging, but negotiates with the mobile terminal via the
bidirectional communication with the mobile terminal to determine
whether or not the fast charging mode can be adopted. Comparing
with the present technology, the security of the fast charging
process is improved.
[0305] Optionally, in an embodiment, the communication control
circuit 1120 is configured to receive a first instruction from the
power adapter, wherein the first instruction is used for querying
whether or not the mobile terminal is to activate the fast charging
mode. The communication control circuit 1120 is further configured
to transmit a reply instruction corresponding to the first
instruction to the power adapter, wherein the reply instruction
corresponding to the first instruction is used for indicating that
the mobile terminal agrees to activate the fast charging mode.
[0306] Optionally, in an embodiment, the reply instruction
corresponding to the first instruction includes a number of bits.
The bits include a bit used for indicating whether or not the
mobile terminal agrees to activate the fast charging mode, and a
bit used for indicating a path impedance of the mobile terminal.
The path impedance of the mobile terminal is used for the power
adapter to determine whether or not the USB interface is in good
contact.
[0307] Optionally, in an embodiment, a format of the reply
instruction corresponding to the first instruction is 101XYYYYYY, X
indicates 1 bit, and Y indicates 1 bit. X=1 indicates that the
mobile terminal agrees to activate the fast charging mode, and X=0
indicates that the mobile terminal disagrees to activate the fast
charging mode. The path impedance of the mobile terminal equals to
YYYYYY*5 m.OMEGA..
[0308] Optionally, in an embodiment, the first instruction is
10101000 or 0xA8.
[0309] Optionally, in an embodiment, the reply instruction
corresponding to the second instruction includes a number of bits.
The bits of the reply instruction corresponding to the second
instruction include a bit used for indicating that the current
output voltage of the power adapter is proper, high, or low.
[0310] Optionally, in an embodiment, a format of the reply
instruction corresponding to the second instruction is 1010XX0000.
X indicates 1 bit, XX=11 indicates that the current output voltage
of the power adapter is proper, XX=10 indicates that the current
output voltage of the power adapter is high, and XX=01 indicates
that the current output voltage of the power adapter is low.
[0311] Optionally, in an embodiment, the second instruction is
10100100 or 0xA4.
[0312] Optionally, in an embodiment, the reply instruction
corresponding to the third instruction includes a number of bits.
The bits of the reply instruction corresponding to the third
instruction include a bit used for indicating the maximum charging
current which is currently supported by the mobile terminal.
[0313] Optionally, in an embodiment, a format of the reply
instruction corresponding to the third instruction is 1010XXXXXX, X
indicates 1 bit, and the maximum charging current which is
currently supported by the mobile terminal equals to
3000+(XXXXXX*250) mA.
[0314] Optionally, in an embodiment, the third instruction is
10100110 or 0xA6.
[0315] Optionally, in an embodiment, the reply instruction
corresponding to the fourth instruction includes a number of bits.
The bits of the reply instruction corresponding to the fourth
instruction include a bit used for indicating the current voltage
of the battery, and a bit used for indicating whether or not the
battery is being charged.
[0316] Optionally, in an embodiment, a format of the reply
instruction corresponding to the fourth instruction is 101XYYYYYY,
X indicates 1 bit, and Y indicates 1 bit. X=1 indicates that the
battery is being charged, and X=0 indicates that the battery is not
charged. The current voltage of the battery equals to
3404+(YYYYYY*16)mV.
[0317] Optionally, in an embodiment, the fourth instruction is
10100010 or 0xA2.
[0318] Optionally, in an embodiment, the communication control
circuit 1110 is further configured to receive a fifth instruction
from the power adapter. The fifth instruction is used for informing
the mobile terminal that the USB interface is in poor contact, and
informing the mobile terminal to exit the fast charging mode or
activate the fast charging mode again.
[0319] Optionally, in an embodiment, the fifth instruction is
10110010 or 0xB2.
[0320] Optionally, in an embodiment, the communication control
circuit 1110 is further configured to execute at least one of
following operations when the power adapter determines that the
reply instruction received from the mobile terminal is not
correctly encoded. The following operations include: exciting the
fast charging mode, stopping charging, or redetermining whether or
not to activate the fast charging mode.
[0321] Optionally, in an embodiment, an instruction transmitted
from the mobile terminal to the power adapter includes a number of
bits, and when the mobile terminal transmits any instruction, the
mobile terminal firstly transmits MSB of a number of bits of the
any instruction. Or an instruction received from the power adapter
by the mobile terminal includes a number of bits, and when the
mobile terminal receives an instruction, the mobile terminal
firstly receives MSB of a number of bits of the instruction.
[0322] Optionally, in an embodiment, the clock signal or clock
interrupt signal used in the communication between the power
adapter and the mobile terminal is provided by the power
adapter.
[0323] Optionally, in an embodiment, the instruction transmitted
from the power adapter to the mobile terminal includes a number of
bits, and during a process of transmitting each of the bits, the
power adapter firstly transmits each bit, and then transmits the
clock interrupt signal. Or the reply instruction received from the
mobile terminal by the power adapter includes a number of bits, and
during a process of receiving each of the bits, the power adapter
firstly transmits the clock interrupt signal, and then receives
each bit after a preset time interval.
[0324] Optionally, in an embodiment, each instruction transmitted
from the power adapter to the mobile terminal includes an 8-bit
data, and the power adapter transmits the 8-bit data to the mobile
terminal via eight continuous clock periods of the clock signal.
Level of previous 10 .mu.s of each of the eight continuous clock
periods is low level, and level of latter 500 .mu.s of each of the
eight continuous clock periods is high level. Or each reply
instruction received from the mobile terminal by the power adapter
includes a 10-bit data, and the power adapter receives the 10-bit
data from the mobile terminal via ten continuous clock periods of
the clock signal. Level of previous 500 .mu.s of each of the ten
continuous clock periods is high level, and level of latter 10
.mu.s of each of the ten continuous clock periods is low level.
[0325] Optionally, in an embodiment, during a process of that the
power adapter receives an instruction from the mobile terminal, a
minimum value of high level of the clock signal equals to VDD of
the power adapter minus 0.7V. Or during the process of that the
power adapter receives an instruction from the mobile terminal, a
maximum value of low level of the clock signal is 0.8V. Or during a
process of that the power adapter transmits an instruction to the
mobile terminal, the minimum value of the high level of the clock
signal equals to 0.25VDD+0.8V. Or during the process of that the
power adapter transmits an instruction to the mobile terminal, a
maximum value of the high level of the clock signal is 4.5V. Or,
during the process of that the power adapter transmits an
instruction to the mobile terminal, the maximum value of the low
level of the clock signal is 0.15VDD, and the VDD is work voltage
of the power adapter, and/or the VDD is greater than 3.2V and less
than 4.5V.
[0326] Optionally, in an embodiment, after the mobile terminal
receives the clock interrupt signal, holding time of a data of an
instruction transmitted from the power adapter to the mobile
terminal is 500.+-.5 .mu.s.
[0327] Those skilled in the art should appreciate that units and
programming steps of various examples described in the embodiments
of the present disclosure can be realized by electronic hardware or
a combination of computer software and electronic hardware. Whether
these functions are realized by hardware or software depends on
particular applications and design constraint conditions. For each
particular application, professionals can employ different methods
to realize described functions, but this realization should fall
into the scope of the present disclosure.
[0328] For convenience and simplicity, those skilled in the art can
clearly understand that when the specific work processes of the
above described systems, devices, and units are described, the
corresponding processes of the above method embodiments can be
referred, which will not be repeated herein.
[0329] In several embodiments provided by the present disclosure,
it can be understood that the disclosed systems, devices, and
methods can be implemented by other manners. For example, the
device embodiments described above are only schematic. For example,
the units are divided according to logic functions and can be
divided by another manner in an actual implementation. For example,
several units or assemblies can be combined or can be integrated
into another system, or some features can be ignored, or are not
executed. Another point is that mutual coupling or direct coupling
or communication connection shown or discussed herein can be
indirect coupling or communication connection through certain
interfaces, devices, or units, and can be in the form of
electricity, machine, or other.
[0330] The units illustrated as separate units can be or cannot be
physically separated, and components shown in units can be or
cannot be physical units, that is, can be in a place, or can be
distributed in several network units. A part of or all of the units
can be selected according to actual need to realize the purpose of
the solution of the embodiments.
[0331] Additionally, various functional units in the embodiments of
the present disclosure can be integrated into one processing unit,
or various functional units can exist alone, or two or more units
can be integrated into one unit.
[0332] If the functions can be realized in the form of software
functional units and can be sold or used as stand-alone products,
they can be stored in a computer-readable storage medium. Based on
such understanding, the technical solution of the present
disclosure or the part that contributes to the existing technology
or a part of the technical solution can be embodied in the form of
a software product. The computer software product can be stored in
a storage medium, and include a plurality of instructions
configured to direct a computer device (personal computer, server,
or network device) to execute all of or a part of steps of various
embodiments of the present disclosure. The storage mediums
described above include a U disk, a mobile disk, a read-only memory
(ROM), a random access memory (RAM), a disc, a compact disc, or
other medium storing program codes.
[0333] The foregoing descriptions are merely preferred embodiments
of the present disclosure, rather than limiting the present
disclosure. Any one skilled in the art can easily make change or
alterations within the technology range of the present disclosure,
and those change or alterations shall fall within the protection
scope of the present disclosure. Therefore, the protection scope of
the present disclosure shall be limited by the protection scope of
the claims.
* * * * *