CN204230891U - A kind of anti-reverse power connection circuit - Google Patents
A kind of anti-reverse power connection circuit Download PDFInfo
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- CN204230891U CN204230891U CN201420785098.1U CN201420785098U CN204230891U CN 204230891 U CN204230891 U CN 204230891U CN 201420785098 U CN201420785098 U CN 201420785098U CN 204230891 U CN204230891 U CN 204230891U
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- zener diode
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Abstract
The utility model discloses a kind of anti-reverse power connection circuit, comprise metal-oxide-semiconductor Q1, resistance R1, resistance R2, electric capacity C1 and Zener diode D1, resistance R2 and Zener diode D1 is in parallel, parallel circuits is at Zener diode D1 negative pole end series resistance R1, metal-oxide-semiconductor Q1 grid contact resistance R2 and Zener diode D1 forms the Zener diode D1 negative electrode of parallel circuits, the Zener diode D1 anode of the parallel circuits that metal-oxide-semiconductor Q1 source electrode contact resistance R2 and Zener diode D1 forms, electric capacity C1 one end connects metal-oxide-semiconductor Q1 drain electrode, the other end of other end contact resistance R1.That end that electric capacity C1 is connected with resistance R2 connects positive source, and metal-oxide-semiconductor Q1 that end be connected with electric capacity C1 that drains connects power cathode, whole circuit turn-on.If reversal connection, power supply cannot be connected.In high-current circuit, apply this kind of circuit, greatly reduce production cost and can prevent circuit reversal connection very well again.
Description
Technical field
The utility model relates to technical field of electric control, particularly relates to and needs oppositely to access the anti-reverse power connection circuit of the one protected to positive source and negative pole.
Background technology
Along with all fields of national economy and the national defense industry requirement for transformation of electrical energy and process improves constantly, and will meet demand that is energy-conservation and new energy development, the power semiconductor as electrical energy changer core component also plays a part more and more important.Power electronic device is formed different Power Electronic Circuit with different circuit topologies, realizes various transformation of electrical energy and controlling functions.In order to enable Power Electronic Circuit stable operation and provide excellent electric energy, need to drive reliably power electronic device, control and protection.Reverse-connection protection circuit many uses diode circuit of current power supply, but when big current is applied, the cost of diode design and performance all can not satisfy the demands, the positive source of this circuit realiration cost degradation and negative pole reversal connection access protection.
Utility model content
Technical problem to be solved in the utility model is the anti-reverse power connection circuit of one designed for above-mentioned problems of the prior art, adopt N-channel MOS pipe, by resistance and diodes in parallel, at another resistance of series connection, the grid of metal-oxide-semiconductor is connected the cathode terminal of the diode of parallel circuits, source electrode connects the positive terminal of parallel circuits diode, and the drain electrode of metal-oxide-semiconductor connects one end of an electric capacity, and the other end of electric capacity connects the other end with the resistance of parallel circuit in series.That end that electric capacity is connected with resistance connects positive source, and metal-oxide-semiconductor that end be connected with electric capacity that drains connects power cathode, whole circuit turn-on; Reversal connection, metal-oxide-semiconductor drain electrode and source electrode cut-off, power supply cannot be connected.
The required technical problem solved of the utility model can be achieved through the following technical solutions:
A kind of anti-reverse power connection circuit, comprise metal-oxide-semiconductor Q1, resistance R1, resistance R2, electric capacity C1 and Zener diode D1, described resistance R2 and Zener diode D1 is in parallel, described parallel circuits is at Zener diode D1 cathode terminal series resistance R1, described metal-oxide-semiconductor Q1 grid contact resistance R2 and Zener diode D1 forms the Zener diode D1 cathode terminal of parallel circuits, described metal-oxide-semiconductor Q1 source electrode contact resistance R2 and Zener diode D1 forms the Zener diode D1 anode tap of parallel circuits, described electric capacity C1 mono-pin connects metal-oxide-semiconductor Q1 drain electrode, another pin contact resistance R1 other end.
Described Zener diode D1 can substitute by TVS pipe.
Described metal-oxide-semiconductor Q1 is switch MOS pipe.
Owing to have employed as above technical scheme, the utility model has following features:
For a kind of scheme of effective anti-circuit reversal connection.Metal-oxide-semiconductor manufacture is simple, and low cost of manufacture, applies this kind of circuit in high-current circuit, greatly reduces production cost and can well play the effect preventing circuit reversal connection again simultaneously.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
As shown in Figure 1, the utility model comprises metal-oxide-semiconductor Q1, resistance R1, resistance R2, electric capacity C1 and Zener diode or TVS pipe D1.Series resistance R1 again after resistance R2 is in parallel with Zener diode or TVS pipe D1, the Zener diode of the grid contact resistance R2 of metal-oxide-semiconductor Q1 and Zener diode or TVS pipe D1 parallel circuits or this one end of the negative electrode of TVS pipe D1, the Zener diode of the source electrode contact resistance R2 of metal-oxide-semiconductor Q1 and Zener diode or TVS pipe D1 parallel circuits or this one end of the anode of TVS pipe D1, the drain electrode of metal-oxide-semiconductor Q1 connects one end of electric capacity C1, the other end of the other end contact resistance R1 of electric capacity C1.
That end that electric capacity C1 is connected with resistance R1 connects positive source, and metal-oxide-semiconductor Q1 that end be connected with electric capacity C1 that drains connects power cathode, and the dividing potential drop of resistance R2 makes the grid voltage of metal-oxide-semiconductor Q1 higher than source electrode power supply, metal-oxide-semiconductor Q1 conducting, whole circuit turn-on.If that end that electric capacity C1 is connected with resistance R1 connects power cathode; metal-oxide-semiconductor Q1 that end be connected with electric capacity C1 that drains connects positive source, and the grid voltage of metal-oxide-semiconductor Q1 is low, and metal-oxide-semiconductor Q1 drains and source electrode ends; power supply cannot be connected, and plays a protective role to back-end circuit.
Described resistance R1, R2 provide voltage by dividing potential drop mode to the grid of metal-oxide-semiconductor Q1, and electric capacity C1 is decoupling capacitor, and Zener diode or TVS pipe D1 provide overvoltage protection for metal-oxide-semiconductor Q1 grid.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. an anti-reverse power connection circuit, it is characterized in that, comprise metal-oxide-semiconductor Q1, resistance R1, resistance R2, electric capacity C1 and Zener diode D1, described resistance R2 and Zener diode D1 is in parallel, described parallel circuits is at Zener diode D1 cathode terminal series resistance R1, described metal-oxide-semiconductor Q1 grid contact resistance R2 and Zener diode D1 forms the Zener diode D1 cathode terminal of parallel circuits, described metal-oxide-semiconductor Q1 source electrode contact resistance R2 and Zener diode D1 forms the Zener diode D1 anode tap of parallel circuits, described electric capacity C1 mono-pin connects metal-oxide-semiconductor Q1 drain electrode, another pin contact resistance R1 other end.
2. a kind of anti-reverse power connection circuit as claimed in claim 1, is characterized in that, described Zener diode D1 can substitute by TVS pipe.
3. a kind of anti-reverse power connection circuit as claimed in claim 1, it is characterized in that, described metal-oxide-semiconductor Q1 is switch MOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420785098.1U CN204230891U (en) | 2014-12-12 | 2014-12-12 | A kind of anti-reverse power connection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420785098.1U CN204230891U (en) | 2014-12-12 | 2014-12-12 | A kind of anti-reverse power connection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204230891U true CN204230891U (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420785098.1U Active CN204230891U (en) | 2014-12-12 | 2014-12-12 | A kind of anti-reverse power connection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204230891U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743076A (en) * | 2014-12-12 | 2016-07-06 | 安徽艾可蓝节能环保科技有限公司 | Power source reversal connection prevention circuit |
| CN107017613A (en) * | 2017-06-07 | 2017-08-04 | 上海乐野网络科技有限公司 | It is a kind of to prevent the circuit of reverse power connection |
-
2014
- 2014-12-12 CN CN201420785098.1U patent/CN204230891U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743076A (en) * | 2014-12-12 | 2016-07-06 | 安徽艾可蓝节能环保科技有限公司 | Power source reversal connection prevention circuit |
| CN107017613A (en) * | 2017-06-07 | 2017-08-04 | 上海乐野网络科技有限公司 | It is a kind of to prevent the circuit of reverse power connection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 247000 Industrial Park, Guichi District, Anhui, Chizhou Patentee after: ACTBLUE CO., LTD. Address before: 247000 Industrial Park, Guichi District, Anhui, Chizhou Patentee before: Anhui ActBlue Co., Ltd. |