CN106026247A - Charging equipment and charging method thereof - Google Patents
Charging equipment and charging method thereof Download PDFInfo
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- CN106026247A CN106026247A CN201610438757.8A CN201610438757A CN106026247A CN 106026247 A CN106026247 A CN 106026247A CN 201610438757 A CN201610438757 A CN 201610438757A CN 106026247 A CN106026247 A CN 106026247A
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- Prior art keywords
- power supply
- charger
- supply chip
- reverse current
- charging
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0044—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction specially adapted for holding portable devices containing batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of electronic equipment and discloses charging equipment and a charging method thereof. The charging equipment disclosed by the invention comprises a power supply chip with an OTG interface, a processor and an electronic switch, wherein the processor is used for controlling the power supply chip to output first reverse current or second reverse current; the first reverse current is greater than the second reverse current; the processor is used for switching two data lines of the OTG interface of the power supply chip into a short connection state or a non-short connection state through the electronic switch; when the two data lines are in the short connection state, the power supply chip outputs the first reverse current; and when the two data lines are in the non-short connection state, the power supply chip outputs second reverse current. The invention further provides a charging method. Compared with the prior art, the charging equipment has the advantage that common mobile equipment can effectively supply the other mobile equipment with electricity as a charger, so that convenience is provided for charging.
Description
Technical field
The present invention relates to technical field of electronic equipment, particularly to a kind of charger and charging method thereof.
Background technology
Due to the flying power that all kinds of portable electric appts such as smart mobile phone, panel computer itself is limited,
The emphasis that its charging problems is always paid close attention in the industry.Common charging scheme includes: the mark that equipment vendor provides
Quasi-quick charger, the quick charger etc. that third party provides, standard charger that use equipment carries or
Person's quick charger has charging safety, quick advantage.But, owing to carrying charger whenever and wherever possible
Some inconvenience of itself, people's duration also can run into does not has the difficult situation of charger.
Accordingly, it is desired to provide more charging scheme is to meet the charge requirement of people.Such as, use now
Having electronic equipment is the chargings such as mobile phone as charger.At present, some common electronics such as panel computer set
For having supported USB OTG (abbreviation of On-The-Go) interface, it can be with completely compatible USB2.0
Agreement.Meanwhile, OTG is mainly used in the connection between various different equipment or mobile device, counts
According to exchange.In addition OTG also provides technical support for reverse charging, two mobile devices is being connected
On the premise of together, it is possible to use a wherein mobile device to fill to an other mobile device
Electricity, namely supports that the mobile device of OTG can use as charger.At present, two equipment are even
The medium connect is exactly an OTG line and a USB data line, and wherein, OTG line is connected to power supply
In mobile device, USB line is connected in mobile device to be charged.
Mobile device can as power supply unit be due to, in a mobile device (as a example by mobile phone), its
Charging chip can provide OTG function.The most common charging chip, is possible not only to provide many gears
Electric current, voltage exports, and also boost mode (boost mode), when charging chip is in OTG
During boost mode, charging chip is internal is increased to 5 volts of left sides by dc-dc cell voltage
Right, it is provided that to VBUS end, to be equivalent to the output voltage of standard AC charger, such that it is able to give external
Mobile device is powered,
But, inventors herein have recognized that: the OTG function realized in mobile device at present, only
Reverse power supply function can be met, but the effect of reverse power supply is also far from meeting charge requirement, main body
OTG supply current is less now, causes the charging interval longer.Such as, current OTG can provide
To the electric current of mobile device to be charged at about 200 milliamperes to 300 milliamperes, give it with this small area analysis
During his mobile power supply equipment, if equipment to be charged is in standby going out under screen state, arise that charging
The phenomenon that time is longer；If equipment to be charged bright screen in OTG charging process normally uses, just
There will be charging to maintain an equal level mutually with electric quantity consumption phenomenon unable to make ends meet (general mobile phone screen acquiescence even occurs
The power consumption of brightness is at about 300 milliamperes).
Therefore, current mobile device cannot be also that other mobile devices are effectively charged as charger.
Summary of the invention
The purpose of embodiment of the present invention is to provide a kind of charger and charging method thereof so that common
Mobile device can be that other mobile devices are effectively powered as charger, thus provide convenient for charging.
For solving above-mentioned technical problem, embodiments of the present invention provide a kind of charger, including:
There is the power supply chip of OTG interface, processor and electrical switch；Described processor is used for controlling described
Power supply chip exports the first reverse current or the second reverse current；Wherein, described first reverse current is big
In described second reverse current；Described processor is additionally operable to by described electrical switch, by described power supply core
Two data line of the OTG interface of sheet switch to short circuit state or non-short circuit state；Wherein, described
When two data line are in described short circuit state, described power supply chip exports the first reverse current；Described two
When data line is in described non-short circuit state, described power supply chip exports described second reverse current.
Embodiments of the present invention additionally provide a kind of charging method, and being applied to charges foregoing sets
Standby, including: described charger is detecting that described power supply chip needs to export described first reverse current
Time, control described power supply chip and export described first reverse current, meanwhile, described processor is by described
Electrical switch is by two data line short circuits of described OTG interface；Described charger detect described
When power supply chip needs to export described second reverse current, control the output of described power supply chip described second anti-
To electric current；Meanwhile, described processor passes through described electrical switch by two data of described OTG interface
Line switches to described non-short circuit state.
Embodiment of the present invention is in terms of existing technologies, electric by increasing in existing mobile device
Son switch, and, when needs use this mobile device to be other mobile power supply equipments, mobile device
Processor can control power supply chip (such as charging chip) and export the first reverse current, processes meanwhile
Two data line on the OTG interface of power supply chip are switched to short circuit state also by electrical switch by device,
Thus so that this mobile device can provide the most reversely output electric current to be other mobile power supply equipments,
Further, also by two data line short circuits on OTG interface while output the first reverse current, from
And make mobile device to be charged that the mobile device that this is to be powered be identified as standard charger, it is to avoid treat
Its input current is limited by the mobile device of charging, and then makes the mobile terminal energy of present embodiment
Enough realizing quick charge as standard charger, the charging for mobile device provides more convenience selection.
Additionally, the charger of present embodiment is when being not necessary for other charging of mobile devices, its power supply chip
Two data line that export on the second reverse current, and OTG interface of OTG interface be in non-short circuit
State (i.e. OTG connection status), so makes this charger still provide basic OTG interface
Function, does not affect the normal use of user.
It addition, described electrical switch includes: be connected to described two data line first selection end and
Second selects end, two shorted end and two data signal end, and described first selects end and described second
End is selected to turn on optionally at the same time in said two shorted end or two data signal end；Wherein, institute
State the first selection end and described second and select end when simultaneously turning on said two shorted end, described power supply chip
Export the first reverse current；Described first selects end and described second to select end to simultaneously turn on said two number
During according to signal end, described power supply chip exports the second reverse current.So that electronic switch structure is simple,
Low cost.
It addition, described electrical switch is double-point double-throw switch or two single-pole double-throw switch (SPDT)s.
It addition, described processor enables control end by one is simultaneously coupled to the first of described electrical switch
End and second is selected to select end.
It addition, described first reverse current is more than predetermined threshold value.
It addition, described predetermined threshold value is 1 ampere.Thus, it is possible to provide relatively to mobile device to be charged
Big supply current, it is achieved quick charge.
Accompanying drawing explanation
Fig. 1 is short according to two data line on first embodiment of the invention charger OTG interface
Structural representation when connecing；
Fig. 2 is according to two data line on first embodiment of the invention charger OTG interface not
Structural representation during short circuit；
Fig. 3 is the structural representation according to second embodiment of the invention charger；
Fig. 4 is the flow chart according to third embodiment of the invention charging method.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this
Bright each embodiment is explained in detail.But, it will be understood by those skilled in the art that
In each embodiment of the present invention, propose many technology to make reader be more fully understood that the application thin
Joint.But, even if there is no these ins and outs and many variations based on following embodiment and amendment,
The application each claim technical scheme required for protection can also be realized.
Embodiment of the present invention is another equipment charge based on needing to use an OTG equipment at present
Time, charging current is little, the problem that charge efficiency is low, is analyzed the problem causing charge efficiency low.
On the other hand the low one side of charge efficiency is owing to supply current is little, is owing to equipment to be charged cannot be by
Power supply unit is identified as standard charger, thus limits the size of the charging current provided it.And lead to
Cross two data line short circuits on power supply unit OTG interface, so that charging equipment will power supply
Set and be identified as standard charger.
In view of this, first embodiment of the present invention relates to a kind of charger, and for example, this fills
Electricity equipment can be the mobile device such as smart mobile phone, panel computer, but, present embodiment is for charging
Equipment is not specifically limited.As shown in Figure 1, 2, this charger includes: processor 1, have OTG
The power supply chip 2 of interface, electrical switch 3 and battery 4.
Power supply chip 2 for example, charging chip in present embodiment, charging chip is connected to battery 4.
In present embodiment, power supply chip 2 can provide the electric current of many gears, voltage to export, and works as power supply chip
2 when working in DC DC boost mode, it is possible to using OTG function is other charging of mobile devices.
As preferably, the power supply chip 2 of present embodiment uses can export the reverse current more than predetermined threshold value
Power supply chip, wherein, predetermined threshold value is such as 1 ampere, so, when power supply chip is used for providing anti-
When output electric current, it is possible to output is well-suited for the electric current of current mobile terminal charging.
Processor 2 is connected to power supply chip, is used for controlling power supply chip and exports the first reverse current or
The electric current of the different gear such as two reverse currents.In present embodiment, the first reverse current is reverse more than second
Electric current, the first reverse current is designed as can being the electric current of other charging of mobile devices, the second reverse current
It can be OTG interface fundamental current of offer in time carrying out data transmission of this charger.This reality
The ability that mode of executing exports reverse current for power supply chip is not restricted, as long as power supply chip output is anti-
Can meet for other charging of mobile devices to electric current simultaneously or use as OTG interface.Make
For preferably, in present embodiment, power supply chip 2 includes current value depositor, and processor passes through electric current
Value register controls power supply chip and exports the electricity of the different gear such as the first reverse current or the second reverse current
Stream, specifically, processor can write pre-set current value in real time in current value depositor.
In present embodiment, processor 1 is additionally operable to by electrical switch 3, by the OTG of power supply chip 2
Two data line (200,201) of interface 20 switch to short circuit state or non-short circuit state.Wherein,
When two data line (200,201) are in short circuit state, power supply chip 2 exports the first reverse current,
When two data line (200,201) are in non-short circuit state, power supply chip 2 exports the second reverse current.
In present embodiment mode, two data line are two normal data lines of OTG, are used for realizing charging and set
Data-transformation facility between standby and other equipment.
As preferably, the electrical switch 3 of present embodiment uses double-point double-throw switch.Specifically, double
Double-pole double throw switch includes: be connected to the first selection end 30 and the of two data line (200,201)
Two select end 31, two shorted end (320,322) and two data signal end (321,323).
First selects end 30 and second to select end 31 to turn on optionally at the same time in two shorted end (320,322)
Or two data signal end (321,323).Wherein, first end 30 and second is selected to select end 31
When simultaneously turning on two shorted end (320,322), power supply chip 2 exports the first reverse current, and first
When selecting end 30 and the second selection end 31 to simultaneously turn on two data signal end (321,323), power supply
Chip 2 exports the second reverse current.As it is shown in figure 1, the OTG interface 20 for power supply chip 2 switches
During for short circuit state, the connection status schematic diagram of electrical switch 3, as in figure 2 it is shown, be power supply chip 2
OTG interface 20 when switching to non-short circuit state, the connection status schematic diagram of electrical switch 3.
It is noted that in present embodiment, processor 1 is enabled by one and controls end 33 simultaneously
The the first selection end and second being connected to electrical switch selects end.Thus, when enable is controlled end by processor
When the level of 33 drags down, first selects end 30 and second to select end 31 to simultaneously turn in two data signals
End (321,323), when the level enabling control end 33 is drawn high by processor 1, first selects end
30 and second select end 31 to simultaneously turn in two shorted end (320,322).
Additionally, the charger of present embodiment can be accessed by the ID pin detection on OTG interface
The data wire of this OTG interface is OTG data wire or generic USB data wire, when on OTG interface
ID foot ground connection time, be defaulted as OTG data wire access, when the ID foot on OTG interface is unsettled,
It is defaulted as USB data line to access, thus, charger can be judged by the type of the data wire of access
It is as charging equipment, or power supply unit uses.When charger is in data transmission state,
The enable of electrical switch 3 can be set by application software and control end 33 for low level so that on OTG
Two normal data lines (200,201) be connected with the usb signal on processor, at charger
When OTG reverse power supply state, enabling control end 33 by software design patterns is high level, now, OTG
Two data line (200,201) and two shorted end (320,322) connect, be in short circuit state,
OTG interface provides only power and ground, and OTG interface can be used as standard charger interface and uses,
Equipment to be powered would not carry out current limliting process to power supply source, such that it is able to realize between mobile device
The reverse large current charge of OTG.
Present embodiment compared with prior art, when needs are for charging of mobile devices, it is possible to use another
Platform supports that the mobile device of OTG function is as charger.When wherein a mobile device detects slotting
When the data wire entered is OTG data wire, the reversely output electric current of power supply chip is set to bigger defeated
Go out electric current, meanwhile, by two data line short circuits on its OTG interface, so that connected
Another mobile device can be identified as standard charging equipment so that a mobile device can be quick
For another charging of mobile devices, provide for user's charging and select the most flexibly.
Second embodiment of the present invention relates to a kind of charger.Second embodiment and the first embodiment party
Formula is roughly the same, is in place of the main distinction: in the first embodiment, and electrical switch is a double-pole
Commutator.And in second embodiment of the invention, electrical switch is two single-pole double-throw switch (SPDT)s, from
And be the electrical switch implementation that provides other.
As it is shown on figure 3, electrical switch 3 is two single-pole double-throw switch (SPDT)s.One of them single-pole double-throw switch (SPDT)
Including the first selection end 30, first selects end 30 selectively to turn in shorted end 320 and data signal
End 321, another single-pole double-throw switch (SPDT) includes the second selection end 31, and second selects end selectively to turn on
In shorted end 322 and data signal end 323.
Processor 1 enables control end by one and is simultaneously coupled to the first selection end 30 and the second selection end
31.When needs are for other equipment charges, the first selection end 30 and the second choosing of two single-pole double-throw switch (SPDT)s
Selecting end 31 and simultaneously turn in shorted end (320,322), processor 1 controls power supply chip 2 and exports first
Reverse current.When being not necessary for other equipment charges, two single-pole double-throw switch (SPDT)s first selection end and
Second selects end 31 to simultaneously turn in data signal end (321,323), and processor 1 controls power supply chip
2 output the second reverse currents.It should be noted that in present embodiment, two single-pole double-throw switch (SPDT)s
First selects end 30 and the second same enable selecting end 31 to be connected on processor 1 after connecting to control
End.
The implementation of electrical switch, compared with the first embodiment, is extended by present embodiment,
Improve the practicality of the present invention.
It is noted that each module involved in present embodiment is logic module, in reality
In application, a logical block can be a physical location, it is also possible to be one of a physical location
Point, it is also possible to realize with the combination of multiple physical locations.Additionally, for the innovative part highlighting the present invention,
Not by the unit the closest with solving technical problem relation proposed by the invention in present embodiment
Introduce, but this is not intended that in present embodiment the unit that there is not other.
It will be appreciated by those skilled in the art that all or part of step realizing in above-described embodiment method is
Can instruct relevant hardware by program to complete, this program is stored in a storage medium, bag
Include some instructions with so that an equipment (can be single-chip microcomputer, chip etc.) or processor (processor)
Perform all or part of step of method described in each embodiment of the application.And aforesaid storage medium includes:
USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory), random access memory are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be stored
The medium of program code.
Third embodiment of the invention relates to a kind of charging method, is applied to such as the first embodiment or the
Charger described in two embodiments.As shown in Figure 4, this charging method includes:
Step 40: judge charger the need of exporting the first reverse current, if charger need
Export the first reverse current, then perform step 41, otherwise, perform step 42.Such as, charger is worked as
Detect when its OTG interface is inserted into OTG data wire, it is judged that need to export first for this charger
Reverse current, performs step 41, when charger detects that its OTG interface is inserted into USB data line
Time, it is judged that needing to export the second reverse current for this charger, the second reverse current is reverse less than first
Electric current.Now, step 42 is performed.In step 40, the first reverse current is more than predetermined threshold value, presets threshold
Value can be 1 ampere, so that charger can meet the requirement of quick charge.
Step 41: control power supply chip and export the first reverse current, simultaneous processor will by electrical switch
Two data line short circuits of OTG interface.
Step 42: controlling power supply chip and export the second reverse current, meanwhile, processor passes through electrical switch
Two data line of OTG interface are switched to non-short circuit state.
Present embodiment compared with prior art, is inserted into by the OTG interface of detection electronic equipment
Data wire type judges whether this electronic equipment as charger, and is made by this electronic equipment at needs
During for charger, utilize electrical switch that two data line on OTG interface are carried out short circuit, and
Simultaneously so that the power supply chip of this electronic equipment exports bigger reverse current, so that this electronics sets
For using as standard charger, for other equipment quick charges.
It is seen that, present embodiment is the system embodiment corresponding with the first embodiment, this enforcement
Mode can be worked in coordination enforcement with the first embodiment.The relevant technical details mentioned in first embodiment
The most effective, in order to reduce repetition, repeat no more here.Correspondingly, this enforcement
The relevant technical details mentioned in mode is also applicable in the first embodiment.
The step of the most various methods divides, and is intended merely to describe clear, it is achieved time can merge into one
Step or split some step, is decomposed into multiple step, as long as comprising identical logical relation,
All in the protection domain of this patent；To adding inessential amendment in algorithm or in flow process or drawing
Enter inessential design, but do not change the core design of its algorithm and flow process all at the protection model of this patent
In enclosing.
It will be understood by those skilled in the art that the respective embodiments described above are realize the present invention concrete
Embodiment, and in actual applications, can to it, various changes can be made in the form and details, and the most inclined
From the spirit and scope of the present invention.
Claims (10)
1. a charger, it is characterised in that including: there is the power supply chip of OTG interface, place
Reason device and electrical switch；
Described processor is used for controlling described power supply chip and exports the first reverse current or second reversely electricity
Stream；Wherein, described first reverse current is more than described second reverse current；
Described processor is additionally operable to by described electrical switch, by the OTG interface of described power supply chip
Two data line switch to short circuit state or non-short circuit state；
Wherein, when described two data line are in described short circuit state, it is anti-that described power supply chip exports first
To electric current；When described two data line are in described non-short circuit state, described power supply chip output described the
Two reverse currents.
Charger the most according to claim 1, it is characterised in that described electrical switch includes:
The the first selection end and second being connected to described two data line selects end, two shorted end and two
Individual data signal end；
Described first selects end and described second to select end to turn on optionally at the same time in said two short circuit
End or two data signal end；
Wherein, when described first selection end and described second selects end to simultaneously turn on said two shorted end,
Described power supply chip exports the first reverse current；
When described first selection end and described second selects end to simultaneously turn on said two data signal end, institute
State power supply chip and export the second reverse current.
Charger the most according to claim 2, it is characterised in that described electrical switch is double
Double-pole double throw switch or two single-pole double-throw switch (SPDT)s.
Charger the most according to claim 2, it is characterised in that described processor passes through one
The individual control end that enables is simultaneously coupled to the first selection end and the second selection end of described electrical switch.
5. according to the charger described in claim 1, it is characterised in that described first is the most electric
Stream is more than predetermined threshold value.
Charger the most according to claim 5, it is characterised in that described predetermined threshold value is 1
Ampere.
7. according to the charger described in claim 1, it is characterised in that described power supply chip bag
Containing current value depositor；Described processor is defeated by power supply chip described in described current value register controlled
Go out described first reverse current or the second reverse current.
Charger the most according to claim 1, it is characterised in that described charger be with
Descend any one: smart mobile phone or panel computer.
9. a charging method, is applied to the charger as described in any one in claim 1-8,
It is characterized in that, including:
Described charger, when detecting that described power supply chip needs to export described first reverse current, is controlled
Make described power supply chip and export described first reverse current,
Meanwhile, described processor passes through described electrical switch by short for two data line of described OTG interface
Connect；
Described charger, when detecting that described power supply chip needs to export described second reverse current, is controlled
Make described power supply chip and export described second reverse current；
Meanwhile, two data line of described OTG interface are cut by described processor by described electrical switch
It is changed to described non-short circuit state.
Charging method the most according to claim 9, it is characterised in that described first reverse current
More than predetermined threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610438757.8A CN106026247A (en) | 2016-06-17 | 2016-06-17 | Charging equipment and charging method thereof |
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|---|---|---|---|
| CN201610438757.8A CN106026247A (en) | 2016-06-17 | 2016-06-17 | Charging equipment and charging method thereof |
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| CN201610438757.8A Pending CN106026247A (en) | 2016-06-17 | 2016-06-17 | Charging equipment and charging method thereof |
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| CN106685018A (en) * | 2017-03-17 | 2017-05-17 | 上海与德科技有限公司 | Reverse charging method and device as well as terminal |
| CN106802872A (en) * | 2016-12-16 | 2017-06-06 | 华勤通讯技术有限公司 | A kind of method and terminal that equipment room charging is carried out by USB interface |
| CN107565650A (en) * | 2017-09-30 | 2018-01-09 | 深圳传音通讯有限公司 | Design of Compatibility method and circuit |
| CN108631401A (en) * | 2018-05-23 | 2018-10-09 | 北京小米移动软件有限公司 | Charging circuit, method, electronic equipment and storage medium |
| CN109918327A (en) * | 2019-03-27 | 2019-06-21 | 深圳传音通讯有限公司 | OTG reversely charging electric current improvement method and OTG mobile phone |
| CN110620602A (en) * | 2018-06-19 | 2019-12-27 | Oppo（重庆）智能科技有限公司 | Reverse charging and data transmission sharing system, multiplexing data line and electronic device |
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| CN111416403A (en) * | 2020-03-26 | 2020-07-14 | 北京小米移动软件有限公司 | Reverse wired charging circuit, reverse wired charging control method, terminal, and medium |
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