CN108462228A - A kind of protection circuit, guard method and terminal - Google Patents
A kind of protection circuit, guard method and terminal Download PDFInfo
- Publication number
- CN108462228A CN108462228A CN201810190636.5A CN201810190636A CN108462228A CN 108462228 A CN108462228 A CN 108462228A CN 201810190636 A CN201810190636 A CN 201810190636A CN 108462228 A CN108462228 A CN 108462228A
- Authority
- CN
- China
- Prior art keywords
- voltage
- switch module
- comparator
- charger
- threshold voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of protection circuit, guard method and terminals, wherein protection circuit includes：Comparator and switch module, comparator are used to export control signal to switch module according to the relative size of threshold voltage and charger voltage, and control signal is used to control the opening and closing of switch module；Threshold voltage is that the maximum charge device voltage under being charged normal according to battery determines；Switch module is used for when opening, and is connected to the charge path of charger voltage input terminal battery, and, when closed, disconnect the charge path of charger voltage input terminal battery.Comparator controls switch module by comparing the relative size between charger voltage and threshold voltage; and then the charge path of charger voltage input terminal battery is controlled, charge path can be disconnected in time when charger voltage is more than threshold voltage to realize protection.Its circuit structure is simple, it is easy to accomplish, terminal cost can be reduced.
Description
Technical field
The present invention relates to a kind of electronic science and technology field more particularly to protection circuit, guard method and terminals.
Background technology
When charging to terminal device, excessively high charger voltage can cause the damage of terminal device.Currently, terminal
Equipment is mostly real using overvoltage protection (Over Voltage Protection, OVP) chip to the protection of high charger voltage
It is existing.However, the cost price of OVP chips is higher, it is unfavorable for popularization and application of the OVP chips in terminal device.
Therefore, there is an urgent need for a kind of high charger voltage protection schemes of low cost at present, to realize the protection to terminal device.
Invention content
A kind of protection circuit of offer of the embodiment of the present invention, guard method and terminal, protect high charger voltage to reduce
The cost of shield.
In a first aspect, the embodiment of the present invention provides a kind of protection circuit, including：
Comparator and switch module；The output end of the comparator is electrically connected with the first input end of the switch module；
The first input end external charger voltage of the comparator, the external thresholding electricity of the second input terminal of the comparator
Pressure, the comparator according to the relative size of the threshold voltage and the charger voltage to the switch module for exporting
Signal is controlled, the control signal is used to control the opening and closing of the switch module；The threshold voltage is according to
Battery charge normal under maximum charge device voltage determine；
The external charger voltage of the second input terminal of the switch module, the first output end and terminal charge chip
Input terminal is electrically connected；The output end of the charging chip is electrically connected with end cell, and the charging chip was used for according to the end
The cell voltage of end-cell adjusts the size of charging voltage；The switch module is used for when opening, and is connected to the charger electricity
Pressure inputs the charge path of the end cell, and, when closed, disconnects the charger voltage and input the end cell
Charge path.
Comparator can compare the relative size between charger voltage and threshold voltage.Since threshold voltage is according to electricity
Pond charge normal under maximum charge device voltage determine, therefore when charger voltage be more than threshold voltage when, charger voltage
Just it is possible to destroy end cell or charging chip.Comparator is by comparing relatively large between charger voltage and threshold voltage
Small generation control signal controls the charging of charger voltage input terminal battery to control the opening and closing of switch module
Path so that charge path can be disconnected in time when charger voltage is more than threshold voltage to realize to end cell and fill
The protection of electrical chip.Meanwhile the protection circuit structure that the embodiment of the present invention is provided is simple, it is easy to accomplish, terminal can be reduced
Cost.
Optionally, the comparator is used for when the charger voltage is more than the threshold voltage, to the switching molding
Block exports first control signal, and the first control signal is for closing the switch module；
The comparator is additionally operable to when the charger voltage is not more than the threshold voltage, defeated to the switch module
Go out second control signal, the second control signal is for opening the switch module.
Comparator exports two kinds of controls respectively according to two kinds of possible magnitude relationships between charger voltage and threshold voltage
Signal, when charger voltage is more than threshold voltage, output first control signal turns off the switch module, charger voltage not
When more than threshold voltage, output second control signal opens switch module, to realize to charger voltage input terminal battery
Charge path control.
Optionally, the protection circuit further includes booster；
The input terminal of the booster is electrically connected with the end cell, the output end of the booster and the comparator
Electrical connection；
The booster is used for the cell voltage according to the end cell, and the thresholding electricity is provided to the comparator
Pressure.
Threshold voltage is provided for comparator by booster, booster is powered using end cell, can be provided for comparator
More stable threshold voltage.
Optionally, the switch module is load switch.
Using load switch as switch module, conduction impedance when switch module is opened can be reduced, is reduced normal
In charging process, switch module is lost caused by charger voltage.
Second aspect, the embodiment of the present invention also provide a kind of guard method, are suitable for protection as described in any one of the above embodiments
Circuit, the method includes：
The comparator obtains the charger voltage and the threshold voltage；
The comparator is defeated to the switch module according to the relative size of the threshold voltage and the charger voltage
Go out to control signal；
The switch module is turned on and off according to the control signal；The switch module is when opening, described in connection
Charger voltage inputs the charge path of the end cell, and, when closed, disconnect described in the charger voltage input
The charge path of end cell.
Optionally, the comparator according to the relative size of the threshold voltage and the charger voltage to the switch
Module output control signal, including：
The comparator is when the charger voltage is more than the threshold voltage, to the first control of switch module input
Signal processed, the first control signal is for closing the switch module；
The comparator is when the charger voltage is not more than the threshold voltage, to switch module input second
Signal is controlled, the second control signal is for opening the switch module.
Optionally, the protection circuit further includes booster；
Before the comparator obtains the charger voltage and the threshold voltage, further include：
The booster obtains the cell voltage of the end cell；
The booster provides the threshold voltage according to the cell voltage of the end cell to the comparator.
The third aspect, the embodiment of the present invention also provide a kind of terminal, including charging chip and end cell, and, it is above-mentioned
Any one of them protects circuit.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is a kind of terminal structure schematic diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of protection electrical block diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of feasible protection electrical block diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of guard method flow diagram provided in an embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Fig. 1 is a kind of terminal structure schematic diagram provided in an embodiment of the present invention, as shown in Figure 1, terminal includes protection circuit
1, charging chip 2 and end cell 3.Protect 1 external charger voltage V of circuitin, charger voltage VinThrough protecting circuit 1 and filling
2 incoming terminal battery 3 of electrical chip realizes the charging to end cell 3, wherein charging chip 2 is used for according to end cell 3
Cell voltage adjusts the size of charging voltage, and it is by charger voltage that charging voltage, which is supplied to end cell 3, charging voltage,
VinIt converts.Generally, charger voltage VinCan be the voltage that charger is supplied to terminal, and charging voltage is then filled
Electrical chip is to charger voltage VinThe voltage of end cell 3 is supplied to after being converted.In use due to user, may
Situations such as charger or power network fluctuation for the requirement that falls short of specifications can be used, charger voltage V can be causedinExcessive, damage is filled
Electrical chip 2, and then make battery that can not charge normal.The protection circuit 1 that the embodiment of the present invention is provided can prevent excessive fill
Electrical voltage VinCharging chip 2 is inputted, and then realizes the protection to charging chip 2 and end cell 3.
Fig. 2 is a kind of protection electrical block diagram provided in an embodiment of the present invention, as shown in Fig. 2, protection circuit 1 wraps
It includes：Comparator 11 and switch module 12；The output port of comparator 11 is electrically connected with the first input port of switch module 12；Than
Compared with the first input port external charger voltage V of device 11in, the external threshold voltage V of the second input port of comparator 11c, than
It is used for according to threshold voltage V compared with device 11cWith the relative size of charger voltage Vin control signal, control are exported to switch module 12
Signal processed is used to control the opening and closing of switch module 12；Threshold voltage VcBe under being charged normal according to end cell 3 most
What big charging voltage determined；Second input port external charger voltage V of switch module 12in, the first output port and terminal
The input port of charging chip 2 is electrically connected, and switch module 12 is used to, when opening, be connected to charger voltage VinInput terminal battery
3 charge path, and, when closed, disconnect charger voltage VinThe charge path of input terminal battery 3.
Comparator 11 can compare charger voltage VinWith threshold voltage VcBetween relative size.Due to threshold voltage Vc
It is that maximum charge device voltage under being charged normal according to end cell 3 determines, therefore works as charger voltage VinMore than thresholding electricity
Press VcWhen, charger voltage VinJust it is possible to destroy end cell 3 or charging chip 2.Comparator 11 is by comparing charger electricity
Press VinWith threshold voltage VcBetween relative size generate control signal to control the opening and closing of switch module 12, and then control
Charger voltage V processedinThe charge path of input terminal battery 3 so that can be in charger voltage VinMore than threshold voltage VcWhen
Charge path is disconnected in time to realize the protection to end cell 3 and charging chip 2.Moreover, the embodiment of the present invention is provided
Protection circuit structure it is simple, it is easy to accomplish, terminal cost can be reduced.Optionally, the protection that the embodiment of the present invention is provided
Circuit can be realized directly on printed circuit board (Printed Circuit Board, PCB), be set using the circuit of separate type
Meter mode further decreases charger voltage VinThe excessively high influence that charging chip 2 and end cell 3 are generated.
In protection circuit shown in Fig. 2, comparator 11 can be according to threshold voltage VcWith charger voltage VinIt is opposite
Size exports control signal to switch module 12, to control the opening and closing of switch module 12.Optionally, the embodiment of the present invention
The realization method for providing a kind of feasible comparator 11 can realize that the above-mentioned control to switch module 12, comparator 11 have
Body is used for：In charger voltage VinMore than threshold voltage VcWhen, export first control signal, the first control letter to switch module 12
Number for turning off the switch module 12；Comparator 11 is additionally operable in charger voltage VinNo more than threshold voltage VcWhen, to switching molding
Block 12 exports second control signal, and second control signal is for opening switch module 12.
It implements in structure, first control signal and second control signal can be by level separations, for example, the first control
Signal is low level, and second control signal is high level.Comparator 11 compares charger voltage VinWith threshold voltage VcBetween
Relative size relationship, if charger voltage VinMore than threshold voltage Vc, then low level, low level conduct are exported to switch module 12
Control signal makes switch module 12 close, to be disconnected charger voltage VinWith the transmission path between charging chip 2, realize
Protection to charging chip 2 and end cell 3；If charger voltage VinNo more than threshold voltage Vc, then defeated to switch module 12
Go out high level, high level makes switch module 12 open as control signal, and end cell 3 can charge normal.
In protection circuit shown in Fig. 2, comparator 11 can compare charger voltage VinWith threshold voltage VcBetween
Relative size relationship, therefore, comparator 11 need to obtain stable threshold voltage VcTo ensure the reliability of protection circuit.It is optional
, Fig. 3 is a kind of feasible protection electrical block diagram provided in an embodiment of the present invention, as shown in figure 3, in protection circuit also
Including booster 13；The input port of booster 13 is electrically connected with end cell 3, output port and the comparator 11 of booster 13
Electrical connection；Booster 11 is used for the cell voltage V according to end cell 3b, threshold voltage V is provided to comparator 11c.Specific implementation
In structure, booster 13 can realize that structure is relatively simple by DC-DC (DC/DC) conversion circuit.Booster 13 can incite somebody to action
The cell voltage V of end cell 3bBe converted to the threshold voltage V needed for comparator 11c.For example, threshold voltage VcFor 6V, then boost
The effect of device 13 is by cell voltage VbIt boosts to 6V and is supplied to comparator 11 as threshold voltage Vc.Using booster 13
Threshold voltage V is provided for comparator 11c, booster 13 is powered using end cell 3, by the cell voltage V of end cell 3bConversion
For threshold voltage Vc, more stable threshold voltage V can be provided for comparatorc, to improve the reliability of protection circuit.
It implements in structure, the comparator 11 in Fig. 2 and Fig. 3 can be the comparator circuit of routine, simple in structure, easily
In realization.Switch module 12 can be switching transistor, and structure is simpler.The case where there are certain requirements to charge efficiency
Under, optionally, switch module 12 or load switch.Load switch has lower compared to common switching transistor
Conduction impedance, it is possible to reduce switch module 12 is lost caused by charger voltage, to have higher charge efficiency.
To sum up, the embodiment of the present invention provides a kind of protection circuit, including：Comparator and switch module；The output of comparator
End is electrically connected with the first input end of switch module；The first input end external charger voltage of comparator, the second of comparator
The external threshold voltage of input terminal, comparator are used to be exported to switch module according to the relative size of threshold voltage and charger voltage
Signal is controlled, control signal is used to control the opening and closing of switch module；Threshold voltage is charged normal down according to battery
What maximum charge device voltage determined；Second input terminal external charger voltage of switch module, the first output end and terminal charge
The input terminal of chip is electrically connected；The output end of charging chip is electrically connected with end cell, and charging chip is used for according to end cell
Cell voltage adjust charging voltage size；Switch module is used to, when opening, be connected to charger voltage input terminal battery
Charge path, and, when closed, disconnect charger voltage input terminal battery charge path.Comparator can compare
Relative size between charger voltage and threshold voltage.Since threshold voltage is the maximum charge under being charged normal according to battery
Device voltage determine, therefore when charger voltage be more than threshold voltage when, charger voltage be just possible to destroy end cell or
Charging chip.Comparator generates control signal to control out by comparing the relative size between charger voltage and threshold voltage
The opening and closing of module are closed, and then control the charge path of charger voltage input terminal battery so that can be in charger
Voltage disconnects charge path to realize the protection to end cell and charging chip in time when being more than threshold voltage.
Based on the same technical idea, the embodiment of the present invention also provides a kind of guard method, for charging in end cell
In the process to the protection of terminal, the guard method that the embodiment of the present invention is provided can be carried based on any of the above-described inventive embodiments
The protection circuit of confession is realized.Fig. 4 is a kind of guard method flow diagram provided in an embodiment of the present invention, as shown in figure 4, protection
Method mainly includes the following steps that：
S401：Comparator obtains charger voltage and threshold voltage.
S402：Comparator exports control signal according to the relative size of threshold voltage and charger voltage to switch module.
S403：Switch module is turned on and off according to control signal；For switch module when opening, connection charger voltage is defeated
Enter the charge path of end cell, and, when closed, disconnect the charge path of charger voltage input terminal battery.
In S402, the embodiment of the present invention provides a kind of optional realization method.Comparator is according to threshold voltage and charging
The relative size of device voltage exports control signal to switch module, including：Comparator charger voltage be more than threshold voltage when,
First control signal is inputted to switch module, first control signal is for turning off the switch module；Comparator charger voltage not
When more than threshold voltage, second control signal is inputted to switch module, second control signal is for opening switch module.Wherein,
First control signal and second control signal can be distinguished by low and high level, when control signal is applied on switch module,
The opening and closing of control switch module can be changed by the height of level.
In S401, the threshold voltage acquired in comparator is provided by the booster in protection circuit, optionally, is risen
Depressor can provide threshold voltage by duration in charging process for comparator.Optionally, booster is to be in the following manner
Comparator provides threshold voltage, including：Booster obtains the cell voltage of end cell；Booster is according to the electricity of end cell
Cell voltage provides threshold voltage to comparator.Booster is connected with end cell, is powered using end cell, thus its be than
More stablize compared with the threshold voltage that device provides, so as to improve the reliability of protection circuit.
Based on the same technical idea, the embodiment of the present invention also provides a kind of terminal, which includes charging chip and end
End-cell, and the protection circuit that is provided such as any of the above-described inventive embodiments.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. a kind of protection circuit, which is characterized in that including：
Comparator and switch module；The output end of the comparator is electrically connected with the first input end of the switch module；
The first input end external charger voltage of the comparator, the external threshold voltage of the second input terminal of the comparator,
The comparator is used to be exported to the switch module according to the relative size of the threshold voltage and the charger voltage and control
Signal processed, the control signal are used to control the opening and closing of the switch module；The threshold voltage is according to the electricity
Pond charge normal under maximum charge device voltage determine；
The external charger voltage of the second input terminal of the switch module, the input of the first output end and terminal charge chip
End electrical connection；The output end of the charging chip is electrically connected with end cell, and the charging chip is used for according to terminal electricity
The cell voltage in pond adjusts the size of charging voltage；The switch module is used to, when opening, it is defeated to be connected to the charger voltage
Enter the charge path of the end cell, and, when closed, disconnects the charger voltage and input filling for the end cell
Power path.
2. protection circuit as described in claim 1, which is characterized in that the comparator, for big in the charger voltage
When the threshold voltage, first control signal is exported to the switch module, the first control signal is described for closing
Switch module；
The comparator is additionally operable to when the charger voltage is not more than the threshold voltage, to switch module output the
Two control signals, the second control signal is for opening the switch module.
3. protection circuit as described in claim 1, which is characterized in that further include booster；
The input terminal of the booster is electrically connected with the end cell, and the output end of the booster is electrically connected with the comparator
It connects；
The booster is used for the cell voltage according to the end cell, and the threshold voltage is provided to the comparator.
4. protection circuit as described in claim 1, which is characterized in that the switch module is load switch.
5. a kind of guard method, which is characterized in that be suitable for Claims 1-4 any one of them such as and protect circuit, the side
Method includes：
The comparator obtains the charger voltage and the threshold voltage；
The comparator is exported to the switch module according to the relative size of the threshold voltage and the charger voltage and is controlled
Signal processed；
The switch module is turned on and off according to the control signal；The switch module is connected to the charging when opening
The charge path of end cell described in device control source, and, when closed, disconnects the charger voltage and input the terminal
The charge path of battery.
6. method as claimed in claim 5, which is characterized in that the comparator is according to the threshold voltage and the charger
The relative size of voltage exports control signal to the switch module, including：
The comparator is when the charger voltage is more than the threshold voltage, to switch module input the first control letter
Number, the first control signal is for closing the switch module；
The comparator is when the charger voltage is not more than the threshold voltage, to the second control of switch module input
Signal, the second control signal is for opening the switch module.
7. method as claimed in claim 5, which is characterized in that the protection circuit further includes booster；
Before the comparator obtains the charger voltage and the threshold voltage, further include：
The booster obtains the cell voltage of the end cell；
The booster provides the threshold voltage according to the cell voltage of the end cell to the comparator.
8. a kind of terminal, which is characterized in that including charging chip and end cell, and, such as any one of Claims 1-4 institute
The protection circuit stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810190636.5A CN108462228A (en) | 2018-03-08 | 2018-03-08 | A kind of protection circuit, guard method and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810190636.5A CN108462228A (en) | 2018-03-08 | 2018-03-08 | A kind of protection circuit, guard method and terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108462228A true CN108462228A (en) | 2018-08-28 |
Family
ID=63216672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810190636.5A Pending CN108462228A (en) | 2018-03-08 | 2018-03-08 | A kind of protection circuit, guard method and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108462228A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969685A (en) * | 2020-08-14 | 2020-11-20 | 深圳传音控股股份有限公司 | Handheld terminal, power supply circuit thereof, power supply control method thereof and readable storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163019A (en) * | 1994-10-31 | 1997-10-22 | 摩托罗拉公司 | Protection switch for a battery powered device |
| CN1578055A (en) * | 2003-07-18 | 2005-02-09 | 日立工机株式会社 | DC power source unit with battery charging function |
| CN201118269Y (en) * | 2007-10-31 | 2008-09-17 | 中兴通讯股份有限公司 | Charging overvoltage protection circuit |
| US20080310064A1 (en) * | 2007-06-13 | 2008-12-18 | Sanyo Electric Co., Ltd. | Protection Circuit |
| CN101567556A (en) * | 2009-05-26 | 2009-10-28 | 上海华勤通讯技术有限公司 | Over-voltage charge protective device and method used for charging cell phone |
| CN201789282U (en) * | 2010-05-21 | 2011-04-06 | 上海新进半导体制造有限公司 | Battery charge/discharge protection circuit |
| CN103795040A (en) * | 2014-01-28 | 2014-05-14 | 广东欧珀移动通信有限公司 | Electronic device and power adapter thereof |
-
2018
- 2018-03-08 CN CN201810190636.5A patent/CN108462228A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163019A (en) * | 1994-10-31 | 1997-10-22 | 摩托罗拉公司 | Protection switch for a battery powered device |
| CN1578055A (en) * | 2003-07-18 | 2005-02-09 | 日立工机株式会社 | DC power source unit with battery charging function |
| US20080310064A1 (en) * | 2007-06-13 | 2008-12-18 | Sanyo Electric Co., Ltd. | Protection Circuit |
| CN201118269Y (en) * | 2007-10-31 | 2008-09-17 | 中兴通讯股份有限公司 | Charging overvoltage protection circuit |
| CN101567556A (en) * | 2009-05-26 | 2009-10-28 | 上海华勤通讯技术有限公司 | Over-voltage charge protective device and method used for charging cell phone |
| CN201789282U (en) * | 2010-05-21 | 2011-04-06 | 上海新进半导体制造有限公司 | Battery charge/discharge protection circuit |
| CN103795040A (en) * | 2014-01-28 | 2014-05-14 | 广东欧珀移动通信有限公司 | Electronic device and power adapter thereof |
Non-Patent Citations (1)
| Title |
|---|
| 杨世春等: "《电动汽车设计基础》", 31 July 2013 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969685A (en) * | 2020-08-14 | 2020-11-20 | 深圳传音控股股份有限公司 | Handheld terminal, power supply circuit thereof, power supply control method thereof and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109905042A (en) | A kind of power-supply device and its power circuit | |
| CN103647318B (en) | Communicating terminal, charge control method, device and circuit | |
| CN205811601U (en) | Charging control circuit, charging device and mobile terminal | |
| CN104158241B (en) | A kind of charge control method, device and a kind of POS terminal | |
| CN106532820A (en) | Quick charging method and electronic equipment | |
| CN110138022A (en) | Charging unit, battery charge controller, terminal device and charging method | |
| CN111864855A (en) | Charging circuit, charging chip and electronic equipment | |
| CN105375538B (en) | Quick charge device | |
| CN101980435B (en) | Direct current/alternating-current converter for acquiring stable low voltage and telephone power supply circuit | |
| CN113013956B (en) | Charging and discharging circuit and electronic device | |
| CN105743185B (en) | A kind of mobile terminal and charging method | |
| CN201243215Y (en) | Bidirectional power supply source circuit for iron battery mobile phone | |
| US20210249870A1 (en) | Battery control circuit, battery and unmanned aerial vehicle | |
| CN108462228A (en) | A kind of protection circuit, guard method and terminal | |
| CN109196751A (en) | A kind of charging unit and terminal | |
| CN209642342U (en) | Overvoltage crowbar and electronic equipment | |
| US20230045028A1 (en) | Charging system, method and device for controlling charging system, and electronic device | |
| CN109888871A (en) | A kind of how battery balanced power supply unit, method of supplying power to, electric locking and vehicle | |
| CN217335166U (en) | Control circuit for parallel charging of multiple chargers | |
| CN109378868A (en) | Electronic device power supply circuit and electronic equipment | |
| CN102118057A (en) | DC UPS circuit with integrated charge-discharge circuit | |
| CN111585457B (en) | Power adapter and electronic equipment | |
| CN114447491A (en) | Electronic device and control method | |
| CN208158104U (en) | Vehicle-mounted charging power port protection circuit | |
| CN207910546U (en) | UPS control circuits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201210 Building 1, 399 Keyuan Road, Zhangjiang High Tech Park, Pudong New Area, Shanghai Applicant after: Huaqin Technology Co.,Ltd. Address before: 201210 Building 1, 399 Keyuan Road, Zhangjiang High Tech Park, Pudong New Area, Shanghai Applicant before: Huaqin Technology Co.,Ltd. Address after: 201210 Building 1, 399 Keyuan Road, Zhangjiang High Tech Park, Pudong New Area, Shanghai Applicant after: Huaqin Technology Co.,Ltd. Address before: 201210 Building 1, 399 Keyuan Road, Zhangjiang High Tech Park, Pudong New Area, Shanghai Applicant before: HUAQIN TELECOM TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180828 |
|
| RJ01 | Rejection of invention patent application after publication |