CN206332447U - Direct current inputs anti-surge voltage circuit - Google Patents
Direct current inputs anti-surge voltage circuit Download PDFInfo
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- CN206332447U CN206332447U CN201621459971.3U CN201621459971U CN206332447U CN 206332447 U CN206332447 U CN 206332447U CN 201621459971 U CN201621459971 U CN 201621459971U CN 206332447 U CN206332447 U CN 206332447U
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Abstract
Anti-surge voltage circuit is inputted the utility model discloses a kind of direct current, belongs to electronic technology field.The utility model includes the voltage suppressor device that surge voltage detects control circuit and is series between DC supply input negative terminal and dc source output negative terminal, and the voltage suppressor device is controlled by surge voltage detection control circuit.Surge Suppressors part is serially connected between power input negative terminal and output negative terminal by the utility model, so that its drive circuit is simpler, drive circuit detects surge voltage using TL431, and surge voltage is suppressed by optocoupler control voltage suppression device, circuit is simple, easily controllable, the Surge Suppressors part uses N-channel FET, can significantly reduce loss.
Description
Technical field
The utility model belongs to electronic technology field, and in particular to a kind of direct current inputs anti-surge voltage circuit.
Background technology
Because too high surge voltage easily produces damage to electrical equipment, therefore vehicle-mounted electricity system has harsh wave
Gush voltage request.And anti-surge circuit under normal circumstances is the input positive terminal for N-channel FET being series at dc source
Between output plus terminal, but the drive circuit of the N-channel FET of this kind of anti-surge circuit is more complicated.Also have P-channel
Effect pipe is series at the anti-surge circuit between the input positive terminal of dc source and output plus terminal, but P-channel field-effect transistor (PEFT) pipe is turned on
Loss is excessive, and the performance impact to power supply is larger.
Utility model content
The utility model technical issues that need to address are to provide that a kind of drive circuit is simple, it is small to be lost, and can effectively suppress
Surge voltage, the direct current input anti-surge voltage circuit for protecting electrical equipment.
To solve the above problems, technical solution adopted in the utility model is：
A kind of direct current inputs anti-surge voltage circuit, including surge voltage detection controls circuit and is series at dc source
Voltage suppressor device between input negative terminal and dc source output negative terminal, the voltage suppressor device is detected by surge voltage to be controlled
Circuit control processed.
Further, the voltage suppressor device is N-channel FET Q1, FET Q1 source electrode connection direct current
Power input negative terminal, drain electrode connection dc source output negative terminal, grid is FET Q1 control end.
Further, surge voltage detection control circuit include reference voltage source TL431, optocoupler U1, resistance R1~
R6, wherein, resistance R5 is connected to the output positive and negative terminal of dc source, resistance R3, R4 and reference voltage after being connected with resistance R6
Source TL431 is sequentially connected in series the output positive and negative terminal being followed by dc source, reference voltage source TL431 reference edge connection resistance R5,
R6 connecting node, optocoupler U1 light emitting diode positive pole is connected to resistance R3, R4 connecting node, optocoupler U1 light-emitting diodes
Pipe negative pole is connected to the connecting node of resistance R4 and reference voltage source TL431 negative electrode, optocoupler U1 photosensitive tube grounded emitter,
Optocoupler U1 photosensitive pipe collector connection FET Q1 grid, is connected to the input of dc source after resistance R1, R2 series connection
Positive and negative terminal, resistance R1, R2 connecting node connection FET Q1 grid.
Further, also including voltage clamping diode D1, voltage clamping diode D1 is voltage-stabiliser tube, is connected in parallel
Between scene effect pipe Q1 grid and source electrode.
It is using the beneficial effect produced by above-mentioned technical proposal：
Surge Suppressors part is serially connected between power input negative terminal and output negative terminal by the utility model so that it drives
Dynamic circuit is simpler, and drive circuit detects surge voltage using TL431, and is suppressed by optocoupler control voltage suppression device
Surge voltage, circuit is simple, it is easy to control, and the Surge Suppressors part uses N-channel FET, can significantly reduce damage
Consumption.
Brief description of the drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Utility model is described in further detail below in conjunction with the accompanying drawings：
The utility model is a kind of power surge voltage protection circuit, can be suppressed surge voltage in voltage allowed band, protection
Electrical equipment is not disturbed by surge voltage, and is damaged caused by surge voltage.The utility model is detected including surge voltage
Control circuit and the voltage suppressor device being series between DC supply input negative terminal and dc source output negative terminal, the electricity
Suppression device is pressed by surge voltage detection control circuit control.
As shown in figure 1,
The voltage suppressor device is N-channel FET Q1, FET Q1 source electrode connection DC supply input
Negative terminal, drain electrode connection dc source output negative terminal, grid is FET Q1 control end.The surge voltage detection control electricity
Road includes reference voltage source TL431, optocoupler U1, resistance R1~R6, wherein, resistance R5 is connected to direct current after being connected with resistance R6
It is positive and negative that the output positive and negative terminal in source, resistance R3, R4 and reference voltage source TL431 are sequentially connected in series the output being followed by dc source
End, reference voltage source TL431 reference edge connection resistance R5, R6 connecting node, optocoupler U1 light emitting diode positive pole connection
In resistance R3, R4 connecting node, optocoupler U1 light emitting diode negative pole is connected to resistance R4 and reference voltage source TL431 the moon
The connecting node of pole, optocoupler U1 photosensitive tube grounded emitter, optocoupler U1 photosensitive pipe collector connection FET Q1 grid
Pole, is connected to the input positive and negative terminal of dc source, resistance R1, R2 connecting node connection FET after resistance R1, R2 series connection
Q1 grid.Overtension between grid and source electrode in order to prevent FET Q1, in influence FET Q1 life-span, is also wrapped
The voltage clamping diode D1 being connected in parallel between FET Q1 grid and source electrode is included, voltage clamping diode D1 is
Voltage-stabiliser tube.
Operation principle：
When DC supply input voltage is normal, input positive terminal (VIN+) is connected to after resistance R1 and R2 series connection negative with input
Hold between (GND1), provide driving voltage to FET Q1 by resistance R2 partial pressure, FET Q1 is fully on, now defeated
Go out voltage and be approximately equal to input voltage, voltage clamping diode D1 and between Q1 grids and source electrode, for clamped FET Q1
Voltage between grid and source electrode, prevents overtension between Q1 grids and source electrode.When there is surge voltage input, reference voltage
When source TL431 samples surge voltage higher than input maximum safe voltage (Vin+_max), TL431 conductings drive optocoupler U1, light
Coupling U1 is turned on, and drags down FET Q1 gate drive voltage, FET Q1 is entered linear work area, so that the shape on Q1
Into certain voltage drop, make final output voltage (+Vout) voltage stabilizing at maximum safe voltage (Vin+_max).
Claims (4)
1. a kind of direct current inputs anti-surge voltage circuit, it is characterised in that：Including surge voltage detection control circuit and series connection
Voltage suppressor device between DC supply input negative terminal and dc source output negative terminal, the voltage suppressor device is by surge
Voltage detecting and controling circuit is controlled.
2. direct current according to claim 1 inputs anti-surge voltage circuit, it is characterised in that the voltage suppressor device is N
Channel field-effect pipe Q1, the FET Q1 source electrode connection DC supply input negative terminal, drain electrode connection dc source output are negative
End, grid is FET Q1 control end.
3. direct current according to claim 2 inputs anti-surge voltage circuit, it is characterised in that the surge voltage detection control
Circuit processed includes reference voltage source TL431, optocoupler U1, resistance R1~R6, wherein, resistance R5 is connected to directly after being connected with resistance R6
Flow the output positive and negative terminal of power supply, resistance R3, R4 and reference voltage source TL431 be sequentially connected in series be followed by dc source output just
Negative terminal, reference voltage source TL431 reference edge connection resistance R5, R6 connecting node, optocoupler U1 light emitting diode positive pole connects
Resistance R3, R4 connecting node are connected on, optocoupler U1 light emitting diode negative pole is connected to resistance R4's and reference voltage source TL431
The connecting node of negative electrode, optocoupler U1 photosensitive tube grounded emitter, optocoupler U1 photosensitive pipe collector connection FET Q1's
Grid, is connected to the input positive and negative terminal of dc source, resistance R1, R2 connecting node connection field-effect after resistance R1, R2 series connection
Pipe Q1 grid.
4. the direct current input anti-surge voltage circuit according to Claims 2 or 3, it is characterised in that also including voltage clamping two
Pole pipe D1, voltage clamping diode D1 is voltage-stabiliser tube, is connected in parallel between FET Q1 grid and source electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621459971.3U CN206332447U (en) | 2016-12-29 | 2016-12-29 | Direct current inputs anti-surge voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621459971.3U CN206332447U (en) | 2016-12-29 | 2016-12-29 | Direct current inputs anti-surge voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206332447U true CN206332447U (en) | 2017-07-14 |
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ID=59292616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621459971.3U Active CN206332447U (en) | 2016-12-29 | 2016-12-29 | Direct current inputs anti-surge voltage circuit |
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| Country | Link |
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| CN (1) | CN206332447U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494700A (en) * | 2018-11-23 | 2019-03-19 | 珠海格力电器股份有限公司 | Surge protection circuit, data acquisition device and surge protection method thereof |
| CN110011289A (en) * | 2019-04-26 | 2019-07-12 | 西安电子科技大学 | A kind of Surge suppression protector |
| CN111355214A (en) * | 2018-12-20 | 2020-06-30 | 广东美的白色家电技术创新中心有限公司 | Voltage surge protection system |
| CN112202155A (en) * | 2020-10-19 | 2021-01-08 | 天津津航计算技术研究所 | Input voltage surge suppression circuit |
| CN114362118A (en) * | 2021-11-05 | 2022-04-15 | 天津航空机电有限公司 | 28V overvoltage surge suppression circuit |
| WO2022121305A1 (en) * | 2020-12-10 | 2022-06-16 | 珠海格力电器股份有限公司 | Soft start circuit and power supply circuit |
-
2016
- 2016-12-29 CN CN201621459971.3U patent/CN206332447U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494700A (en) * | 2018-11-23 | 2019-03-19 | 珠海格力电器股份有限公司 | Surge protection circuit, data acquisition device and surge protection method thereof |
| CN111355214A (en) * | 2018-12-20 | 2020-06-30 | 广东美的白色家电技术创新中心有限公司 | Voltage surge protection system |
| CN111355214B (en) * | 2018-12-20 | 2023-05-09 | 广东美的白色家电技术创新中心有限公司 | Voltage surge protection system |
| CN110011289A (en) * | 2019-04-26 | 2019-07-12 | 西安电子科技大学 | A kind of Surge suppression protector |
| CN112202155A (en) * | 2020-10-19 | 2021-01-08 | 天津津航计算技术研究所 | Input voltage surge suppression circuit |
| WO2022121305A1 (en) * | 2020-12-10 | 2022-06-16 | 珠海格力电器股份有限公司 | Soft start circuit and power supply circuit |
| CN114362118A (en) * | 2021-11-05 | 2022-04-15 | 天津航空机电有限公司 | 28V overvoltage surge suppression circuit |
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