CN207719809U - A kind of anti-reverse protection integrated circuit - Google Patents
A kind of anti-reverse protection integrated circuit Download PDFInfo
- Publication number
- CN207719809U CN207719809U CN201820007171.0U CN201820007171U CN207719809U CN 207719809 U CN207719809 U CN 207719809U CN 201820007171 U CN201820007171 U CN 201820007171U CN 207719809 U CN207719809 U CN 207719809U
- Authority
- CN
- China
- Prior art keywords
- oxide
- semiconductor
- metal
- circuit
- tvs pipe
- 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.)
- Expired - Fee Related
Links
- 239000004065 semiconductor Substances 0.000 claims abstract description 47
- 230000000087 stabilizing Effects 0.000 claims description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 9
- 239000003381 stabilizer Substances 0.000 description 6
- 230000002441 reversible Effects 0.000 description 3
- 230000001052 transient Effects 0.000 description 3
- 206010003497 Asphyxia Diseases 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000011068 load Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Abstract
The utility model discloses a kind of anti-reverse protection integrated circuits, including TVS pipe parallel circuit, metal-oxide-semiconductor parallel circuit and metal-oxide-semiconductor series circuit, the metal-oxide-semiconductor parallel circuit includes metal-oxide-semiconductor Q1, resistance R6 and zener diode DZ1 are in parallel, the metal-oxide-semiconductor series circuit includes metal-oxide-semiconductor parallel circuit and resistance R5 series connection, the TVS pipe parallel circuit includes TVS pipe DZ3, metal-oxide-semiconductor series circuit and capacitance C1 are in parallel, the grid of the metal-oxide-semiconductor is electrically connected with negative input end, the drain electrode of the metal-oxide-semiconductor is connected with resistance R5, the metal-oxide-semiconductor source electrode is electrically connected with ground terminal, the forward end of the TVS pipe parallel circuit is electrically connected with positive input terminal and output end, the TVS pipe parallel circuit backward end is electrically connected with ground terminal；The advantage that the utility model circuit is simple, circuit stability, integrated level are high, maximum designing points are to solve that circuit height is integrated and the optimization of cost performance well.
Description
Technical field
The utility model is related to reversal connection field of circuit technology, specially a kind of anti-reverse protection integrated circuit.
Background technology
The use of electricity now is with through reaching a kind of universal present situation, how much used thing, can all make in almost living
Electricity consumption, but people also increasingly consider the problems of safety and power consumption when electricity consumption.
Currently, domestic most common reverse connection prevention protection circuit generally uses diode, i.e., seal in one in the anode of power supply
Diode solves, and but, since diode has pressure drop, unnecessary loss, especially battery powered occasion can be caused to circuit,
Original cell voltage has just dropped 0.6V so that service time of battery subtracts greatly, and existing resolution element line with regard to 3.7V with diode
The technical problems such as road complexity and split circuit component parameters type selecting difficulty.
Utility model content
The purpose of this utility model is to provide a kind of anti-reverse protection integrated circuit, circuit is simple, circuit stability, integrates
High advantage is spent, solves the integrated optimization with cost performance of circuit height well, it is mentioned above in the background art to solve
Problem.
To achieve the above object, the utility model provides the following technical solutions：A kind of anti-reverse protection integrated circuit, including
TVS pipe parallel circuit, metal-oxide-semiconductor parallel circuit and metal-oxide-semiconductor series circuit, the metal-oxide-semiconductor parallel circuit include metal-oxide-semiconductor Q1, resistance
R6 and zener diode DZ1 are in parallel, and the metal-oxide-semiconductor series circuit includes metal-oxide-semiconductor parallel circuit and resistance R5 series connection, the TVS
Pipe parallel circuit includes TVS pipe DZ3, metal-oxide-semiconductor series circuit and capacitance C1 in parallel, grid and the negative input end electricity of the metal-oxide-semiconductor
Property connection, the drain electrode of the metal-oxide-semiconductor connect with resistance R5, the metal-oxide-semiconductor source electrode and ground terminal electric connection, and the TVS pipe is simultaneously
The forward end and positive input terminal and output end for joining circuit are electrically connected, and the TVS pipe parallel circuit backward end and ground terminal are electrical
Connection.
Preferably, the zener diode DZ1 is identical with the connection direction of TVS pipe.
Compared with prior art, the utility model has the beneficial effects that：
1, the utility model, circuit stability, integrated level are high, circuit is simple, safe and reliable, of low cost and practicality and high efficiency；
2, anti-reverse using metal-oxide-semiconductor, existing metal-oxide-semiconductor has pressure drop small, and cost is cheap；
3, TVS pipe and zener diode are used, circuit can be effectively protected and metal-oxide-semiconductor will not be by transient state high-energy
It is damaged when impact.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the utility model provides a kind of technical solution：The anti-reverse protection integrated circuit include TVS pipe simultaneously
It includes metal-oxide-semiconductor Q1, resistance R6 and voltage stabilizing to join circuit, metal-oxide-semiconductor parallel circuit and metal-oxide-semiconductor series circuit, the metal-oxide-semiconductor parallel circuit
Diode DZ1 is in parallel, and the metal-oxide-semiconductor series circuit includes metal-oxide-semiconductor parallel circuit and resistance R5 series connection, TVS pipe electricity in parallel
Road includes TVS pipe DZ3, metal-oxide-semiconductor series circuit and capacitance C1 in parallel, and grid and the negative input end of the metal-oxide-semiconductor are electrically connected, institute
The leakage for stating metal-oxide-semiconductor is connected with resistance R5, and the metal-oxide-semiconductor source electrode is electrically connected with ground terminal, the forward direction of the TVS pipe parallel circuit
End is electrically connected with positive input terminal and output end, and the TVS pipe parallel circuit backward end is electrically connected with ground terminal.
Specifically, the zener diode DZ1 is identical with the connection direction of TVS pipe.
N-channel MOS pipe is serially connected with by S pins and D pins between power supply and load, and resistance R5 provides voltage for metal-oxide-semiconductor
Biasing is damaged to prevent reverse power connection to load-strap using the conducting and disconnection of the switching characteristic control circuit of metal-oxide-semiconductor.
When just connecing, R5 provides VGS voltages, MOS saturation conductions.MOS cannot be connected when reversal connection, so playing the role of anti-reverse.
Voltage-stabiliser tube is also a kind of crystal diode, it is characteristic of the breakdown region with burning voltage using PN junction come work
's；The characteristics of zener diode is exactly after puncturing, and the voltage at both ends is held essentially constant.In this way, when voltage-stabiliser tube is accessed electricity
After road, if since supply voltage fluctuates or when other reasons cause each point variation in voltage in circuit, loads the electricity at both ends
Pressure will be held essentially constant.After voltage-stabiliser tube reverse breakdown, although electric current changes in very large range, the electricity at voltage-stabiliser tube both ends
Pressure varies less.Using this characteristic, voltage-stabiliser tube can play pressure stabilization function in circuit.
TVS pipe it there is response time (subnanosecond grade) for being exceedingly fast and quite high surge absoption ability.When its both ends
When being subjected to the high energy impact events of moment, the impedance value between both ends can be become Low ESR by TVS with high speed from high impedance, with
Absorb an instantaneous large-current, its both end voltage strangulation one it is scheduled numerically, to protect subsequent circuit elements
Part is not impacted by high voltage transient spike.
Operation principle：In use, anti-reverse protection succession circuit is connected, power on, at this point, circuit starts to electricity
Hold C1 power supplies, after delay, the impedance value between both ends can be become Low ESR by TVS pipe DZ3 with high speed from high impedance, with
Absorb an instantaneous large-current, its both end voltage strangulation one it is scheduled numerically, to protect subsequent circuit elements
Part is not impacted by high voltage transient spike, and voltage-stabiliser tube DZ1 accesses circuit, if since supply voltage fluctuates or other
When reason causes each point variation in voltage in circuit, loading the voltage at both ends will be held essentially constant, and ensure that circuit element will not be by
To the punch through damage of high voltage, and R5 makes to provide VGS voltages what is just connect, at this time metal-oxide-semiconductor saturation conduction, when reversal connection makes MOS
Pipe is not turned on.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (2)
1. a kind of anti-reverse protection integrated circuit, including TVS pipe parallel circuit, metal-oxide-semiconductor parallel circuit and metal-oxide-semiconductor series circuit,
It is characterized in that：The metal-oxide-semiconductor parallel circuit includes metal-oxide-semiconductor Q1, resistance R6 and zener diode DZ1 in parallel, the metal-oxide-semiconductor string
Connection circuit includes metal-oxide-semiconductor parallel circuit and resistance R5 series connection, and the TVS pipe parallel circuit includes TVS pipe DZ3, metal-oxide-semiconductor series electrical
Road and capacitance C1 are in parallel, and grid and the negative input end of the metal-oxide-semiconductor are electrically connected, and the drain electrode of the metal-oxide-semiconductor is connected with resistance R5,
The metal-oxide-semiconductor source electrode is electrically connected with ground terminal, and the forward end and positive input terminal and output end of the TVS pipe parallel circuit are electrical
Connection, the TVS pipe parallel circuit backward end are electrically connected with ground terminal.
2. a kind of anti-reverse protection integrated circuit according to claim 1, it is characterised in that：The metal-oxide-semiconductor Q1, voltage stabilizing two
Pole pipe DZ1 is identical with the connection direction of TVS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820007171.0U CN207719809U (en) | 2018-01-03 | 2018-01-03 | A kind of anti-reverse protection integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820007171.0U CN207719809U (en) | 2018-01-03 | 2018-01-03 | A kind of anti-reverse protection integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207719809U true CN207719809U (en) | 2018-08-10 |
Family
ID=63054287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820007171.0U Expired - Fee Related CN207719809U (en) | 2018-01-03 | 2018-01-03 | A kind of anti-reverse protection integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207719809U (en) |
-
2018
- 2018-01-03 CN CN201820007171.0U patent/CN207719809U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180810 Termination date: 20200103 |