CN204205574U - A kind of over-discharge protection circuit - Google Patents

A kind of over-discharge protection circuit Download PDF

Info

Publication number
CN204205574U
CN204205574U CN201420776542.3U CN201420776542U CN204205574U CN 204205574 U CN204205574 U CN 204205574U CN 201420776542 U CN201420776542 U CN 201420776542U CN 204205574 U CN204205574 U CN 204205574U
Authority
CN
China
Prior art keywords
resistance
semiconductor
oxide
metal
integrated circuit
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.)
Active
Application number
CN201420776542.3U
Other languages
Chinese (zh)
Inventor
汪军
周治国
林建和
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Auspicious Moral Intelligence Science And Technology Ltd
Guangdong Real Design Intelligent Technology Co Ltd
Original Assignee
Anhui Auspicious Moral Intelligence Science And Technology Ltd
Guangdong Real Design Intelligent Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anhui Auspicious Moral Intelligence Science And Technology Ltd, Guangdong Real Design Intelligent Technology Co Ltd filed Critical Anhui Auspicious Moral Intelligence Science And Technology Ltd
Priority to CN201420776542.3U priority Critical patent/CN204205574U/en
Application granted granted Critical
Publication of CN204205574U publication Critical patent/CN204205574U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a kind of over-discharge protection circuit, comprises metal-oxide-semiconductor Q1, integrated circuit TL431, resistance R1-R5, electric capacity EC1, EC2; One end of R1 is connected with the drain electrode of battery VBAT with Q1, and R2 one end is connected with Q1 grid, and the tie point between R2 and Q1 grid is connected with the other end of R1, and the other end of R2 is connected with TL431 negative electrode, TL431 plus earth; Q1 source electrode is connected with R3 one end, and the R3 other end is connected with one end of R4, the other end ground connection of R4; Tie point between R3 and R4 and TL431 are with reference to being extremely connected, and this tie point is also connected with one end of R5, and the other end of R5 is connected with VBAT; Q1 source electrode is also connected with EC2 anode, EC2 minus earth, and the tie point between Q1 source electrode and EC2 anode is as the output of whole circuit; EC1 anode is connected with VBAT, EC1 minus earth.

Description

A kind of over-discharge protection circuit
Technical field
The utility model relates to Switching Power Supply and controller technology field, more specifically, relates to a kind of over-discharge protection circuit.
Background technology
Along with social development, electronic product constantly updates, and battery has played very large effect in electronic product.Such as existing DC fan, hand-held controller arranges instrument, and all multi-products such as controller for solar all relate to the utilization of rechargeable battery, but this series products battery cross put after be present in certain shortcoming:
1, quiescent dissipation is large;
2, charging not in time, battery is fragile;
3, the complicated cost of protective circuit is high.
Utility model content
The utility model provides a kind of simple and reliable, low-power consumption, the over-discharge protection circuit easily realized.
In order to reach above-mentioned technical purpose, the technical solution of the utility model is as follows:
A kind of over-discharge protection circuit, comprises metal-oxide-semiconductor Q1, integrated circuit TL431, resistance R1-R5, electric capacity EC1, EC2; One end of resistance R1 is connected with the drain electrode of metal-oxide-semiconductor Q1 with battery VBAT, one end of resistance R2 is connected with the grid of metal-oxide-semiconductor Q1, tie point between resistance R2 and the grid of metal-oxide-semiconductor Q1 is connected with the other end of resistance R1, the other end of resistance R2 is connected with the negative electrode of integrated circuit TL431, the plus earth of integrated circuit TL431; The source electrode of metal-oxide-semiconductor Q1 is connected with one end of resistance R3, and the other end of resistance R3 is connected with one end of resistance R4, the other end ground connection of resistance R4; Tie point between resistance R3 and resistance R4 is extremely connected with the reference of integrated circuit TL431, and this tie point is also connected with one end of resistance R5, and the other end of resistance R5 is connected with battery VBAT; The source electrode of metal-oxide-semiconductor Q1 is also connected with the anode of electric capacity EC2, the minus earth of electric capacity EC2, and the tie point between the source electrode of metal-oxide-semiconductor Q1 and the anode of electric capacity EC2 is as the output of whole over-discharge protection circuit; The anode of electric capacity EC1 is connected with battery VBAT, the minus earth of electric capacity EC1.
Preferably, described metal-oxide-semiconductor Q1 is P type metal-oxide-semiconductor.
Preferably, described integrated circuit TL431 is the TL431 being used as comparator.
In the utility model, metal-oxide-semiconductor Q1 is P type metal-oxide-semiconductor, when metal-oxide-semiconductor Q1 conducting after conducting after its grid voltage is lower than drain voltage certain value, when battery VBAT voltage is normal, the reference pole input voltage of TL431 is greater than the reference voltage of integrated circuit TL431, conducting between integrated circuit TL431 anode and negative electrode, now metal-oxide-semiconductor Q1 conducting is load supplying.When cell voltage is lower than set point, the reference pole input voltage of TL431 is less than the reference voltage of integrated circuit TL431, end between integrated circuit TL431 anode and negative electrode, metal-oxide-semiconductor Q1 turns off, circuit is supplying power for outside not, now whole circuit only has integrated circuit TL431 to there is power consumption, and the power on R4 and R5 is very little can be ignored, the power consumption of the resistance suitably adjusting R1, R2 just adjustable integrated circuit TL431.
Compared with prior art, the beneficial effect of technical solutions of the utility model is:
The combination that the utility model adopts integrated circuit TL431 to substitute complicated circuit element as the core devices of Cross prevention realizes Cross prevention function, makes circuit structure simply, also reduces the power consumption of whole circuit simultaneously.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, the technical solution of the utility model is described further.
Embodiment 1
As shown in Figure 1, a kind of over-discharge protection circuit, comprises metal-oxide-semiconductor Q1, integrated circuit TL431, resistance R1-R5, electric capacity EC1, EC2; One end of resistance R1 is connected with the drain electrode of metal-oxide-semiconductor Q1 with battery VBAT, one end of resistance R2 is connected with the grid of metal-oxide-semiconductor Q1, tie point between resistance R2 and the grid of metal-oxide-semiconductor Q1 is connected with the other end of resistance R1, the other end of resistance R2 is connected with the negative electrode of integrated circuit TL431, the plus earth of integrated circuit TL431; The source electrode of metal-oxide-semiconductor Q1 is connected with one end of resistance R3, and the other end of resistance R3 is connected with one end of resistance R4, the other end ground connection of resistance R4; Tie point between resistance R3 and resistance R4 is extremely connected with the reference of integrated circuit TL431, and this tie point is also connected with one end of resistance R5, and the other end of resistance R5 is connected with battery VBAT; The source electrode of metal-oxide-semiconductor Q1 is also connected with the anode of electric capacity EC2, the minus earth of electric capacity EC2, and the tie point between the source electrode of metal-oxide-semiconductor Q1 and the anode of electric capacity EC2 is as the output of whole over-discharge protection circuit; The anode of electric capacity EC1 is connected with battery VBAT, the minus earth of electric capacity EC1.
In the present embodiment, metal-oxide-semiconductor Q1 is P type metal-oxide-semiconductor; Integrated circuit TL431 is the TL431 being used as comparator.
In the present embodiment, metal-oxide-semiconductor Q1 is P type metal-oxide-semiconductor, when metal-oxide-semiconductor Q1 conducting after conducting after its grid voltage is lower than drain voltage certain value, when battery VBAT voltage is normal, the reference pole input voltage of TL431 is greater than the reference voltage of integrated circuit TL431, conducting between integrated circuit TL431 anode and negative electrode, now metal-oxide-semiconductor Q1 conducting is load supplying.When cell voltage is lower than set point, the reference pole input voltage of TL431 is less than the reference voltage of integrated circuit TL431, end between integrated circuit TL431 anode and negative electrode, metal-oxide-semiconductor Q1 turns off, circuit is supplying power for outside not, now whole circuit only has integrated circuit TL431 to there is power consumption, and the power on R4 and R5 is very little can be ignored, the power consumption of the resistance suitably adjusting R1, R2 just adjustable integrated circuit TL431.
The corresponding same or analogous parts of same or analogous label;
Describe in accompanying drawing position relationship for only for exemplary illustration, the restriction to this patent can not be interpreted as;
Obviously, above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., within the protection range that all should be included in the utility model claim.

Claims (3)

1. an over-discharge protection circuit, is characterized in that, comprises metal-oxide-semiconductor Q1, integrated circuit TL431, resistance R1-R5, electric capacity EC1, EC2; One end of resistance R1 is connected with the drain electrode of metal-oxide-semiconductor Q1 with battery VBAT, one end of resistance R2 is connected with the grid of metal-oxide-semiconductor Q1, tie point between resistance R2 and the grid of metal-oxide-semiconductor Q1 is connected with the other end of resistance R1, the other end of resistance R2 is connected with the negative electrode of integrated circuit TL431, the plus earth of integrated circuit TL431; The source electrode of metal-oxide-semiconductor Q1 is connected with one end of resistance R3, and the other end of resistance R3 is connected with one end of resistance R4, the other end ground connection of resistance R4; Tie point between resistance R3 and resistance R4 is extremely connected with the reference of integrated circuit TL431, and this tie point is also connected with one end of resistance R5, and the other end of resistance R5 is connected with battery VBAT; The source electrode of metal-oxide-semiconductor Q1 is also connected with the anode of electric capacity EC2, the minus earth of electric capacity EC2, and the tie point between the source electrode of metal-oxide-semiconductor Q1 and the anode of electric capacity EC2 is as the output of whole over-discharge protection circuit; The anode of electric capacity EC1 is connected with battery VBAT, the minus earth of electric capacity EC1.
2. over-discharge protection circuit according to claim 1, is characterized in that, described metal-oxide-semiconductor Q1 is P type metal-oxide-semiconductor.
3. over-discharge protection circuit according to claim 1, is characterized in that, described integrated circuit TL431 is the TL431 being used as comparator.
CN201420776542.3U 2014-12-11 2014-12-11 A kind of over-discharge protection circuit Active CN204205574U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420776542.3U CN204205574U (en) 2014-12-11 2014-12-11 A kind of over-discharge protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420776542.3U CN204205574U (en) 2014-12-11 2014-12-11 A kind of over-discharge protection circuit

Publications (1)

Publication Number Publication Date
CN204205574U true CN204205574U (en) 2015-03-11

Family

ID=52663494

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420776542.3U Active CN204205574U (en) 2014-12-11 2014-12-11 A kind of over-discharge protection circuit

Country Status (1)

Country Link
CN (1) CN204205574U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104918360A (en) * 2015-05-03 2015-09-16 广东瑞德智能科技股份有限公司 Comprehensive protection circuit of LED power supply
CN106998057A (en) * 2017-04-25 2017-08-01 黄浩波 A kind of LED modules overcurrent protector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104918360A (en) * 2015-05-03 2015-09-16 广东瑞德智能科技股份有限公司 Comprehensive protection circuit of LED power supply
CN106998057A (en) * 2017-04-25 2017-08-01 黄浩波 A kind of LED modules overcurrent protector

Similar Documents

Publication Publication Date Title
CN204287446U (en) A kind of power-fail detection circuit
CN204290475U (en) Power supply switch circuit and electronic equipment
CN204205574U (en) A kind of over-discharge protection circuit
CN105515159A (en) Solar energy controller power source circuit
CN203491754U (en) Reverse-connection-prevention protective plate for vanadium cell
CN104333113A (en) Power circuit
CN204089330U (en) A kind of adaptive power-supply battery supplies power with double circuit device
CN209730867U (en) A kind of anti-battery over-discharge road
CN204103480U (en) A kind of charger reversal connection and short-circuit protection circuit
CN203951221U (en) A kind of uninterrupted power supply charging circuit
CN206820732U (en) An a kind of key switch electromechanics road for low-power consumption
CN204334052U (en) A kind of battery drops into circuit automatically
CN203617696U (en) Cell over-discharge protection circuit
CN204349470U (en) Portable power source integrated circuit
CN204046163U (en) Multi-purposed charger output polarity reverse-connection protection circuit
CN203812024U (en) Microamp-level standby-current electronic switch for battery power supply
CN204288116U (en) A kind of computer battery overvoltage and reversal connection warning circuit
CN204495890U (en) Clock power feed circuit
CN203218990U (en) CT electricity taking circuit
CN203574423U (en) Integration voltage stabilization and low voltage detection power supply chip applied to electronic product
CN203491776U (en) Alternating current/direct current uninterrupted inversion circuit of integrated power supply UPS
CN204068302U (en) With the portable power source of electricity alarm
CN203180885U (en) Optical control circuit based on decimal counter pulse frequency divider
CN103354351B (en) A kind of voltage protection method for single lead-acid battery
CN203166486U (en) Low-power consumption battery power supply reverse protection circuit

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant