CN107346912A - A kind of management of charging and discharging integrates IC - Google Patents
A kind of management of charging and discharging integrates IC Download PDFInfo
- Publication number
- CN107346912A CN107346912A CN201710782427.5A CN201710782427A CN107346912A CN 107346912 A CN107346912 A CN 107346912A CN 201710782427 A CN201710782427 A CN 201710782427A CN 107346912 A CN107346912 A CN 107346912A
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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
- H02J7/007—Regulation of charging or discharging current or voltage
-
- 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
-
- 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
- H02J7/00304—Overcurrent protection
-
- 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)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of management of charging and discharging to integrate IC, and integrating includes electric resistance partial pressure module, a reference source, comparator, logic control circuit, charge and discharge power detection circuit, Vm output control modules, 0V charging Enable/Disable module, short-circuit detecting module, metal-oxide-semiconductor inside IC；Eight terminals are provided with outside integrated IC：Vm、BAT‑、GND、PROG、VDD、VB+、Source、BAT+.The management of charging and discharging of the present invention integrates IC and can realized：Overvoltage charge protection；Overvoltage discharge prevention/low power consumpting state；Overcurrent electric discharge/battery short circuit guard mode；0V batteries charge；Constant-current charge electric current sets end；Intelligent temperature controls；And it is simple to integrate IC application circuits.
Description
Technical field
The present invention relates to semiconductor electronic IC design, and in particular to for high-precision single lithium battery constant current/perseverance
A kind of novel high-precision management of charging and discharging of line ball charge and discharge control management integrates IC.
Background technology
At present, in the application, the rechargeable battery such as lithium ion battery, lithium polymer battery, due to the unstable spy of lithium lining
Property, voltage, electric current are controlled in charging process, ensure battery will not because of overvoltage, excessively stream, overcharge, cross to put etc. and show
Battery core and service life as damaging lithium battery, allow battery to have risk of explosion.
In order to avoid above-mentioned risk, the manufacturers in now applying devise the control circuit of complexity, with increase product into
This, volume evade above-mentioned risk.But in the small field of volume requirement, manufacturers can only use part defencive function, abandon big
The protection feature of part.So cause have phenomena such as exploding or be on fire during the battery in our life.
The content of the invention
It is a primary object of the present invention to provide a kind of management of charging and discharging to integrate IC, while solves battery in charge and discharge process
Middle overvoltage, excessively stream, overcharge, cross phenomena such as putting.Simple applications circuit is especially suitable for portable set application simultaneously, is adapted to
USB power source and adaptor power supplies work, inside use anti-down charging circuit, it is not necessary to outside isolating diode.Solve simultaneously small
Protection requirement in type volume product, ensures the charge and discharge control management of high-precision battery constant current constant voltage.
The technical solution adopted by the present invention is：A kind of management of charging and discharging integrates IC, includes electric resistance partial pressure mould inside integrated IC
Block, a reference source, comparator, logic control circuit, charge and discharge power detection circuit, Vm output control modules, 0V charging Enable/Disable moulds
Block, short-circuit detecting module, metal-oxide-semiconductor；Eight terminals are provided with outside integrated IC：Vm、BAT-、GND、PROG、VDD、VB+、Source、
BAT+；
Its BAT+ terminal voltage in overvoltage charge protection threshold value and overvoltage discharge prevention threshold value, VM ends detection voltage with
Between overcurrent discharge prevention voltage threshold, charge inside control and control of discharge N-MOS pipes are both turned on；Now, can both make
Battery is charged with charger, battery discharge can also be made by load；
Battery charges：When VB+ cell voltages are less than 2.9V, integrated IC low currents enter line precharge to battery；Work as battery
When voltage is more than 2.9V, battery is charged using constant current mode；Integrate knot of the intelligent temperature control circuit inside IC in chip
Charging current is reduced automatically when temperature is more than 115 DEG C, and this function can make Power Processing of the user to greatest extent using chip
Ability, without worrying to damage chip or external component because of overheat；So, user can not when designing charging current
With considering worst case, and simply it is designed according to typical case because in the worst cases, WE1688 can reduce automatically to be filled
Electric current；Charging current is determined by external terminal PROG resistance value R2；
Overvoltage charge protection state：If BAT+ terminal voltages is increased to over overvoltage charge protection threshold value 4.3V, and
Duration exceedes overvoltage charge protection time delay 110mS, then charge inside control MOS ends is switched to VM ends by high level
Level, so that charge inside control MOS is closed, charge circuit is cut off, i.e., into overvoltage charge protection state；
Overvoltage discharge prevention/low power consumpting state：Protected if battery discharge makes BAT+ terminal voltages be reduced to overvoltage electric discharge
Threshold value 2.5V is protected, and the duration exceedes overvoltage discharge prevention time delay 55mS, then control of discharge MOS ends will be made by integrating IC
BAT- ends level is switched to by high level, so that internal discharge control metal-oxide-semiconductor is closed, discharge loop is switched " off ", that is, entered
Tension discharge guard mode；
Overcurrent electric discharge/battery short circuit guard mode, integrate the VM terminal voltages of IC circuits by with the increase of discharge current and
Rise；If discharge current increase makes VM terminal voltages exceed overcurrent discharge prevention threshold value 0.15V, and the duration exceeded electricity
Electric protection time delay 7mS is banished, then integrates IC and enters overcurrent discharge prevention state；Further if increase makes discharge current
VM terminal voltages exceed battery short circuit rotection thresholds 1.36V, and the duration exceedes short-circuit time delay 400uS, then WE1688 enters
Enter battery short circuit guard mode.
Further, inside the integrated IC formed by chip package, it is corresponding with inner function module often to locate pin：
1 pin Vm pin, the Vm output controls with inside, are connected to charge and discharge power detection circuit, Vm terminating resistors, charge and discharge electro-detection
Electric circuit inspection adjusts charging current according to voltage swing to after voltage by control circuit, reaches constant current charge and discharge with this
Electro ultrafiltration；
2 pin BAT-, the negative pole of battery is connected externally to, inside is connected on 2 MOS and divider resistance, and inside is by electric current
Voltage-reference is connected with main control circuit, and loop is formed with BAT+ outside；
8 pin BAT+, outside are connected with the positive pole of battery, are connected inside BAT+ with divider resistance, while be connected to comparator
On, when detecting voltage on BAT+ compared with a reference source voltage, overcharged according to the voltage for detecting different to realize, cross what is put
Battery protection is acted on；
7 pin source, the internal external power supply negative pole that is connected with double MOS；
3 pin GND, IC GND is integrated for management of charging and discharging, is connected with internal circuit blocks；
4 pin PROG are connected internally to constant-current source control, external current-limiting resistance, are adjusted after detecting voltage by internal permanent note source
Section, reach the effect of two level output constant current；
5 pin VDD, IC power supplys power supply pin；
6 pin VB, inside connection main control circuit, external connection anode, detect anode voltage, when magnitude of voltage reaches
During to setting value, internal control circuit disconnects discharge loop, realized and puts and short-circuit protection.
Outside, which is provided with, when further, the integrated IC is applied includes 5V power supplys, charging current sets resistance R2,
Current sense resistor R1, battery；
After integrated IC receives 5V power supplys, start VB+ and charged to BAT；
BAT+ pin detect cell voltage during charging；
When cell voltage is less than 2.9V, battery charges normal；
When BAT+ pin detection cell voltage is more than 4.3V, circuit start overvoltage charge protection；
When square frame 1 connects load, battery energization VDD electric discharges；
During electric discharge when BAT+ voltages are less than 2.5V, integrate IC and start overvoltage discharge prevention；
Current sense resistor R1 detects electric current mistake, integrates IC and starts overcurrent discharge prevention.
Advantages of the present invention：
The management of charging and discharging of the present invention integrates IC and can realized：Overvoltage charge protection；Overvoltage discharge prevention/low-power consumption shape
State；Overcurrent electric discharge/battery short circuit guard mode；0V batteries charge；Constant-current charge electric current sets end；Intelligent temperature controls；And
Integrated IC application circuits are simple.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.
A kind of management of charging and discharging that Fig. 1 is the present invention integrates theory diagram inside IC；
A kind of management of charging and discharging that Fig. 2 is the present invention integrates IC external structures；
A kind of management of charging and discharging that Fig. 3 is the present invention integrates IC concrete application schematic diagrams.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
With reference to figure 1 and Fig. 2, a kind of management of charging and discharging as depicted in figs. 1 and 2 integrates IC, includes resistance inside integrated IC
Division module, a reference source, comparator, logic control circuit, charge and discharge power detection circuit, Vm output control modules, 0V charging allow/
Disabled module, short-circuit detecting module, metal-oxide-semiconductor；Eight terminals are provided with outside integrated IC：Vm、BAT-、GND、PROG、VDD、VB+、
Source、BAT+；
Its BAT+ terminal voltage in overvoltage charge protection threshold value and overvoltage discharge prevention threshold value, VM ends detection voltage with
Between overcurrent discharge prevention voltage threshold, charge inside control and control of discharge N-MOS pipes are both turned on；Now, can both make
Battery is charged with charger, battery discharge can also be made by load；
Battery charges：When VB+ cell voltages are less than 2.9V, integrated IC low currents enter line precharge to battery；Work as battery
When voltage is more than 2.9V, battery is charged using constant current mode；Integrate knot of the intelligent temperature control circuit inside IC in chip
Charging current is reduced automatically when temperature is more than 115 DEG C, and this function can make Power Processing of the user to greatest extent using chip
Ability, without worrying to damage chip or external component because of overheat；So, user can not when designing charging current
With considering worst case, and simply it is designed according to typical case because in the worst cases, WE1688 can reduce automatically to be filled
Electric current；Charging current is determined by external terminal PROG resistance value R2；
Overvoltage charge protection state：If BAT+ terminal voltages is increased to over overvoltage charge protection threshold value 4.3V, and
Duration exceedes overvoltage charge protection time delay 110mS, then charge inside control MOS ends is switched to VM ends by high level
Level (low level), so that charge inside control MOS is closed, charge circuit is cut off, i.e., into overvoltage charge protection shape
State；
Overvoltage discharge prevention/low power consumpting state：Protected if battery discharge makes BAT+ terminal voltages be reduced to overvoltage electric discharge
Threshold value 2.5V is protected, and the duration exceedes overvoltage discharge prevention time delay 55mS, then control of discharge MOS ends will be made by integrating IC
BAT- ends level (low level) is switched to by high level, so that internal discharge control metal-oxide-semiconductor is closed, discharge loop is switched " off ",
Enter overvoltage discharge prevention state；
Overcurrent electric discharge/battery short circuit guard mode, integrate the VM terminal voltages of IC circuits by with the increase of discharge current and
Rise；If discharge current increase makes VM terminal voltages exceed overcurrent discharge prevention threshold value 0.15V, and the duration exceeded electricity
Electric protection time delay 7mS is banished, then integrates IC and enters overcurrent discharge prevention state；Further if increase makes discharge current
VM terminal voltages exceed battery short circuit rotection thresholds 1.36V, and the duration exceedes short-circuit time delay 400uS, then WE1688 enters
Enter battery short circuit guard mode.
Management of charging and discharging, which is integrated inside IC WE1688, to be formed by chip package, often locates pin and inner function module one
One correspondence：
1 pin is Vm pin, the Vm output controls with inside, is connected to charge and discharge power detection circuit, Vm terminating resistors, charge and discharge electric-examination
After slowdown monitoring circuit detects voltage, charging current is adjusted by control circuit according to voltage swing, filled with this to reach constant current
Discharge process.
2 pin are BAT-, are connected externally to the negative pole of battery, and inside is connected on 2 MOS and divider resistance, and inside is by electricity
Stream voltage-reference is connected with main control circuit, and loop is formed with BAT+ outside.
8 pin BAT+, outside are connected with the positive pole of battery, are connected inside BAT+ with divider resistance, while be connected to comparator
On, when on BAT+ detect voltage compared with a reference source voltage.Voltage according to detecting different overcharges to realize, crosses what is put
Battery protection is acted on.
Be connected external power supply negative pole inside 7 pin source with double MOS.
3 pin GND, WE1688 GND, is connected internal circuit blocks.
4 pin PROG are connected internally to constant-current source control, external current-limiting resistance, are adjusted after detecting voltage by internal permanent note source
Section, reach the effect of two level output constant current.
5 pin VDD, IC power supplys power supply pin.
Connection main control circuit inside 6 pin VB, external connection anode, detects anode voltage, when magnitude of voltage reaches
During to setting value, internal control circuit disconnects discharge loop, realized and puts and short-circuit protection.
With reference to figure 3, as shown in figure 3, being provided with outside during the integrated IC applications includes 5V power supplys, charging current setting
Resistance R2, current sense resistor R1, battery；
After integrated IC receives 5V power supplys, start VB+ and charged to BAT；
BAT+ pin detect cell voltage during charging；
When cell voltage is less than 2.9V, battery charges normal；
When BAT+ pin detection cell voltage is more than 4.3V, circuit start overvoltage charge protection；
When square frame 1 connects load, battery energization VDD electric discharges；
During electric discharge when BAT+ voltages are less than 2.5V, integrate IC and start overvoltage discharge prevention；
Current sense resistor R1 detects electric current mistake, integrates IC and starts overcurrent discharge prevention.
It is access 5V power supplys in square frame 1.
After WE1688 receives 5V power supplys, start VB+ and charged to BAT.
Square frame 2 is to set charging current.
BAT+ pin detect cell voltage during charging.
When cell voltage is less than 2.9V, battery charges normal.
When BAT+ pin detection cell voltage is more than 4.3V, circuit start overvoltage charge protection.
When square frame 1 connects load (bulb), the battery energization VDD of square frame 4 electric discharges.
During electric discharge when BAT+ voltages are less than 2.5V, WE1688 starts overvoltage discharge prevention.
Square frame 3 detects electric current mistake, and WE1688 starts overcurrent discharge prevention.
It is a high-precision single lithium battery charging, charge/discharge control circuit that the management of charging and discharging of the present invention, which integrates IC, it
The functions such as the over-pressed charge protection of high accuracy, overvoltage discharge prevention, overcurrent discharge prevention can be realized.Integrated IC includes single-unit
Lithium ion battery constant current/constant voltage linear charger, inside use anti-down charging circuit, it is not necessary to outside isolating diode.Thermal feedback
Charging current can be automatically adjusted, to be limited under the conditions of high-power operation or high environment temperature chip temperature
System.Interiors of products is integrated with capacitance-resistance (RC) device, power transistor, metal-oxide-semiconductor, and charging current can be set with non-essential resistance, no
Need separately to add choked flow diode and current sense resistor.High-precision voltage reference source, error amplifier and the resistance of chip internal
Potential-divider network ensures that the precision of battery-end modulation voltage within 1%, meets the requirement of lithium ion battery and lithium polymer battery.
Make it outside without any device.
The management of charging and discharging of the present invention integrates IC and can realized：Overvoltage charge protection；Overvoltage discharge prevention/low-power consumption shape
State；Overcurrent electric discharge/battery short circuit guard mode；0V batteries charge；Constant-current charge electric current sets end；Intelligent temperature controls；And
Integrated IC application circuits are simple.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (3)
1. a kind of management of charging and discharging integrates IC, it is characterised in that includes electric resistance partial pressure module, a reference source inside integrated IC, compares
Device, logic control circuit, charge and discharge power detection circuit, Vm output control modules, 0V charging Enable/Disable module, short-circuit detecting mould
Block, metal-oxide-semiconductor；Eight terminals are provided with outside integrated IC：Vm、BAT-、GND、PROG、VDD、VB+、Source、BAT+；
Its BAT+ terminal voltage in overvoltage charge protection threshold value and overvoltage discharge prevention threshold value, VM ends detection voltage with it is excessively electric
Between banishing electric protection voltage threshold, charge inside control and control of discharge N-MOS pipes are both turned on；Now, both can use fill
Electrical equipment charges to battery, can also make battery discharge by load；
Battery charges：When VB+ cell voltages are less than 2.9V, integrated IC low currents enter line precharge to battery；Work as cell voltage
During more than 2.9V, battery is charged using constant current mode；Intelligent temperature control circuit inside integrated IC surpasses in the junction temperature of chip
Charging current is reduced automatically when crossing 115 DEG C, this function can make power handling capability of the user to greatest extent using chip,
Without worrying to damage chip or external component because of overheat；So, user can not have to examine when designing charging current
Consider worst case, and be simply designed according to typical case because in the worst cases, WE1688 can reduce charging electricity automatically
Stream；Charging current is determined by external terminal PROG resistance value R2；
Overvoltage charge protection state：If making BAT+ terminal voltages increase to over overvoltage charge protection threshold value 4.3V, and continue
Time exceedes overvoltage charge protection time delay 110mS, then charge inside control MOS ends is switched to VM ends electricity by high level
Flat, so that charge inside control MOS is closed, charge circuit is cut off, i.e., into overvoltage charge protection state；
Overvoltage discharge prevention/low power consumpting state：If battery discharge makes BAT+ terminal voltages be reduced to overvoltage discharge prevention threshold
Value 2.5V, and the duration exceed overvoltage discharge prevention time delay 55mS, then integrate IC will make control of discharge MOS ends by height
Level switchs to BAT- ends level, so that internal discharge control metal-oxide-semiconductor is closed, discharge loop is switched " off ", i.e., into overvoltage
Discharge prevention state；
Overcurrent electric discharge/battery short circuit guard mode, the VM terminal voltages of integrated IC circuits will raise with the increase of discharge current；
If discharge current increase makes VM terminal voltages exceed overcurrent discharge prevention threshold value 0.15V, and the duration puts more than overcurrent
Electric protection time delay 7mS, then integrate IC and enter overcurrent discharge prevention state；Further if increase makes VM ends to discharge current
Voltage exceedes battery short circuit rotection thresholds 1.36V, and the duration exceedes short-circuit time delay 400uS, then WE1688 enters electricity
Pond short-circuit protection state.
2. management of charging and discharging according to claim 1 integrates IC, it is characterised in that inside the integrated IC is sealed by chip
Dress forms, and it is corresponding with inner function module often to locate pin：
1 pin Vm pin, the Vm output controls with inside, are connected to charge and discharge power detection circuit, Vm terminating resistors, charge and discharge power detection circuit
After detecting voltage, charging current is adjusted by control circuit according to voltage swing, made with this to reach constant current charge-discharge
With；
2 pin BAT-, the negative pole of battery is connected externally to, inside is connected on 2 MOS and divider resistance, and inside is by Current Voltage
A reference source is connected with main control circuit, and loop is formed with BAT+ outside；
8 pin BAT+, outside are connected with the positive pole of battery, are connected inside BAT+ with divider resistance, while are connected on comparator, when
On BAT+ detect voltage with a reference source voltage compared with, overcharged according to the voltage for detecting different to realize, mistake put to electricity
Pond protective effect；
7 pin source, the internal external power supply negative pole that is connected with double MOS；
3 pin GND, IC GND is integrated for management of charging and discharging, is connected with internal circuit blocks；
4 pin PROG are connected internally to constant-current source control, external current-limiting resistance, are adjusted, reached by internal permanent note source after detecting voltage
Acted on to two level output constant current；
5 pin VDD, IC power supplys power supply pin；
6 pin VB, inside connection main control circuit, external connection anode, detect anode voltage, are set when magnitude of voltage reaches
During definite value, internal control circuit disconnects discharge loop, realized and puts and short-circuit protection.
3. management of charging and discharging according to claim 1 integrates IC, it is characterised in that outside is provided with during the integrated IC applications
Including 5V power supplys, charging current, resistance R2, current sense resistor R1, battery are set；
After integrated IC receives 5V power supplys, start VB+ and charged to BAT；
BAT+ pin detect cell voltage during charging；
When cell voltage is less than 2.9V, battery charges normal；
When BAT+ pin detection cell voltage is more than 4.3V, circuit start overvoltage charge protection；
When square frame 1 connects load, battery energization VDD electric discharges；
During electric discharge when BAT+ voltages are less than 2.5V, integrate IC and start overvoltage discharge prevention；Current sense resistor R1 detection electricity
Flow through, integrate IC and start overcurrent discharge prevention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710782427.5A CN107346912B (en) | 2017-09-02 | 2017-09-02 | Charging and discharging management integrated IC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710782427.5A CN107346912B (en) | 2017-09-02 | 2017-09-02 | Charging and discharging management integrated IC |
Publications (2)
| Publication Number | Publication Date |
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| CN107346912A true CN107346912A (en) | 2017-11-14 |
| CN107346912B CN107346912B (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710782427.5A Active CN107346912B (en) | 2017-09-02 | 2017-09-02 | Charging and discharging management integrated IC |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737055A (en) * | 2021-01-13 | 2021-04-30 | 南昌嘉信高科技有限公司 | Charging protection circuit and electronic equipment |
| CN113541280A (en) * | 2020-04-13 | 2021-10-22 | 深圳三浦微电子股份有限公司 | Emergency load circuit and device capable of being turned off and charged |
| TWI775542B (en) * | 2021-07-26 | 2022-08-21 | 宏碁股份有限公司 | Mobile devices and control method for avoiding accidental shutdown |
| CN116191607A (en) * | 2023-02-16 | 2023-05-30 | 深圳市合科泰电子有限公司 | Linear lithium ion battery charging management chip |
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| CN104967156A (en) * | 2015-06-08 | 2015-10-07 | 惠州Tcl移动通信有限公司 | System capable of releasing overcurrent protection state of battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541280A (en) * | 2020-04-13 | 2021-10-22 | 深圳三浦微电子股份有限公司 | Emergency load circuit and device capable of being turned off and charged |
| CN113541280B (en) * | 2020-04-13 | 2024-05-03 | 深圳三浦微电子股份有限公司 | Emergency load circuit and device capable of being charged by turning off light |
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| CN116191607B (en) * | 2023-02-16 | 2024-01-26 | 深圳市合科泰电子有限公司 | Linear lithium ion battery charging management chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107346912B (en) | 2023-06-23 |
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