CN203415971U - Anti-overvoltage surge protection control circuit designed based on field-effect transistor - Google Patents
Anti-overvoltage surge protection control circuit designed based on field-effect transistor Download PDFInfo
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- CN203415971U CN203415971U CN201320403302.4U CN201320403302U CN203415971U CN 203415971 U CN203415971 U CN 203415971U CN 201320403302 U CN201320403302 U CN 201320403302U CN 203415971 U CN203415971 U CN 203415971U
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- effect transistor
- overvoltage surge
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Abstract
The utility model discloses an anti-overvoltage surge protection control circuit designed based on a field-effect transistor. The surge protection control circuit comprises a control circuit (I) and a switch circuit (II), wherein the control circuit (I) is connected with an input voltage; one end of the switch circuit (II) is connected with the input voltage and the other end is connected with a collector electrode of a PNP triode (5) of the control circuit (I) . The control circuit (I) comprises a capacitor (3), wherein the capacitor (3) is parallel to a first voltage-regulator tube (4) so as to delay or accelerate overturn motion of the control circuit. By using the circuit, when overvoltage surge generated by an input power supply is applied to a secondary power supply input terminal, a secondary power supply is ensured to withstand an impact of the overvoltage surge. After the overvoltage surge, electronic equipment does not have any fault.
Description
Technical field
The utility model relates to a kind of power protecting circuit of electronic equipment, particularly a kind of anti-overvoltage surge protection control circuit building based on field effect transistor.
Background technology
In the avionic device of high reliability power supply, regulation secondary power supply should meet the requirement in national military standard GJB181 with resistance to overvoltage surge, when the overvoltage surge producing when input power is applied to secondary power supply input, secondary power supply should be able to tolerate the impact of overvoltage surge, to guarantee after overvoltage surge, there is not any fault in electronic equipment.Normal voltage surge refers to the change in voltage from controlled steady-state value, and this variation is that the intrinsic adjusting by electric supply system causes, as the disturbance being caused by system normal operations such as load transfer, adjuster corrective actions, produces.
In order to meet the requirement with the defencive function of resistance to overvoltage surge, existing secondary power supply is generally at input and connect piezo-resistance, TVS pipe, or adopts high voltage tolerant input device.The use of piezo-resistance and TVS pipe, makes the Short-Circuit High Current producing when there is overvoltage surge absorb power grid energy, causes the impact on other electronic equipments on electrical network.And because piezo-resistance, TVS pipe are after having experienced overvoltage surge, itself can come to harm and have influence on its useful life.If adopt high voltage tolerant input device, not only cost can increase, and the scope of application of device is also limited.
Summary of the invention
For the normal operation that solves the deficiencies in the prior art and meet airborne vehicle electronic equipment, the utility model provides a kind of anti-overvoltage surge protection control circuit building based on field effect transistor.This circuit can guarantee that secondary power supply should be able to tolerate the impact of overvoltage surge when the overvoltage surge of input power generation is applied to secondary power supply input.After overvoltage surge, there is not any fault in electronic equipment.
The present invention realizes by following technical scheme.
The anti-overvoltage surge protection control circuit that field effect transistor builds, comprises the control circuit I being connected with input voltage, and one end is connected with input voltage, the switching circuit II that the other end is connected with the collector electrode of the PNP triode 5 of control circuit I.
Further, described control circuit I comprises: the first resistance 1, the second resistance 2, the first voltage-stabiliser tube 4 and PNP triode 5, and wherein the emitter of one end of the first resistance 1 and PNP triode 5 is connected with input voltage; One end of the other end of the first resistance 1 and the second resistance 2 is in series, and the base stage of PNP triode 5 is connected between the first resistance 1 and the second resistance 2; The negative pole of the other end of the second resistance 2 and the first voltage-stabiliser tube 4 joins, the plus earth of the first voltage-stabiliser tube 4.
Further, described switching circuit II comprises negative pole, the 4th resistance 7, field effect transistor 8 and the 3rd resistance 9 of the second voltage-stabiliser tube 6, wherein: one end of the negative pole of the second voltage-stabiliser tube 6, the 4th resistance 7 is connected with input voltage with the negative pole of field effect transistor 8: one end of the positive pole of the collector electrode of PNP triode 5, the second voltage-stabiliser tube 6, the other end of the 4th resistance 7 and field effect transistor 8 positive poles is connected with one end of the 3rd resistance 9, the other end ground connection of the 3rd resistance 9; The other end of field effect transistor 8 positive poles is connected with output voltage.
Further, described control circuit I comprises electric capacity 3, and described the first voltage-stabiliser tube 4 is in parallel with electric capacity 3.
Accompanying drawing explanation
Fig. 1 is according to the anti-overvoltage surge protection control circuit figure building based on field effect transistor of the utility model embodiment
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 1; the anti-overvoltage surge protection control circuit building based on field effect transistor; comprise the control circuit I being connected with input voltage, and one end is connected with input voltage, the switching circuit II that the other end is connected with the collector electrode of the PNP triode 5 of control circuit I.
In one embodiment, control circuit I comprises: the first resistance 1, the second resistance 2, the first voltage-stabiliser tube 4 and PNP triode 5, and wherein the emitter of one end of the first resistance 1 and PNP triode 5 is connected with input voltage; One end of the other end of the first resistance 1 and the second resistance 2 is in series, and the base stage of PNP triode 5 is connected between the first resistance 1 and the second resistance 2; The negative pole of the other end of the second resistance 2 and the first voltage-stabiliser tube 4 joins, the plus earth of the first voltage-stabiliser tube 4.
Switching circuit II comprises negative pole, the 4th resistance 7, field effect transistor 8 and the 3rd resistance 9 of the second voltage-stabiliser tube 6, wherein: one end of the negative pole of the second voltage-stabiliser tube 6, the 4th resistance 7 is connected with input voltage with the negative pole of field effect transistor 8: one end of the positive pole of the collector electrode of PNP triode 5, the second voltage-stabiliser tube 6, the other end of the 4th resistance 7 and field effect transistor 8 positive poles is connected with one end of the 3rd resistance 9, the other end ground connection of the 3rd resistance 9; The other end of field effect transistor 8 positive poles is connected with output voltage.
By after above-mentioned anti-overvoltage surge protection control circuit place in circuit, under normal voltage, input voltage directly arrives output.If input voltage vin is lower than the reference voltage of voltage the first voltage-stabiliser tube 4, the first voltage-stabiliser tube 4 not conductings, the base voltage Vb that is connected in the PNP triode 5 between the first resistance 1 and the second resistance 2 equals input voltage vin, 5 cut-offs of PNP triode, field effect transistor 8 conductings; If input voltage vin is higher than the reference voltage of the first voltage-stabiliser tube 4, the first voltage-stabiliser tube 4 conductings, base voltage Vb is lower than input voltage vin, and 5 conductings of PNP triode, turn-off field effect transistor 8.
In one embodiment, in order to delay or accelerate the rotary movement of control circuit, an electric capacity 3 in parallel on the first voltage-stabiliser tube 4 of foregoing circuit, because electric capacity 3 and the first resistance 1 and the second resistance 2 form charge circuits.This loop makes input voltage vin in the situation that be less than the conducting voltage of the first voltage-stabiliser tube 4, and at powered on moment, the voltage of out-put supply Vout can be parabolical and rise to input voltage vin, makes secondary power supply avoid being subject to the impact of precipitous voltage.And, when input voltage vin sports by normal voltage the conducting voltage that is greater than voltage reference voltage-stabiliser tube (when overvoltage surge occurs), because the first electric capacity 3 both end voltage can not be suddenlyd change, thereby make PNP triode 5 conducting at once, accelerated the shutoff of field effect transistor 8.
By above-mentioned preferred anti-overvoltage surge protection control circuit place in circuit, by national military standard GJB181, carry out overvoltage surge experiment test.Result shows, this circuit has good inhibitory action to overvoltage surge, can make secondary power supply avoid the impact of overvoltage surge, thereby has guaranteed the safe handling of electronic equipment.
Above embodiment is the specific descriptions of antagonism overvoltage surge protection control circuit, but the utility model is not limited to this.Those skilled in the art is under guidance of the present utility model, and any change of having done without creative work, all within protection range of the present utility model.
Claims (4)
1. the anti-overvoltage surge building based on field effect transistor is protected control circuit; it is characterized in that; comprise the control circuit (I) being connected with input voltage; and one end is connected with input voltage, the switching circuit (II) that the other end is connected with the collector electrode of the PNP triode (5) of control circuit (I).
2. anti-overvoltage surge as claimed in claim 1 is protected control circuit, it is characterized in that, described control circuit (I) comprising: the first resistance (1), the second resistance (2), the first voltage-stabiliser tube (4) and PNP triode (5), and wherein one end of the first resistance (1) is connected with input voltage with the emitter of PNP triode (5); One end of the other end of the first resistance (1) and the second resistance (2) is in series, and the base stage of PNP triode (5) is connected between the first resistance (1) and the second resistance (2); The negative pole of the other end of the second resistance (2) and the first voltage-stabiliser tube (4) joins, the plus earth of the first voltage-stabiliser tube (4).
3. anti-overvoltage surge as claimed in claim 2 is protected control circuit, it is characterized in that, described switching circuit (II) comprising: the negative pole of the second voltage-stabiliser tube (6), the 4th resistance (7), field effect transistor (8) and the 3rd resistance (9), wherein: the negative pole of the second voltage-stabiliser tube (6), one end of the 4th resistance (7) is connected with input voltage with the negative pole of field effect transistor (8): the collector electrode of PNP triode (5), the positive pole of the second voltage-stabiliser tube (6), the anodal one end of the other end of the 4th resistance (7) and field effect transistor (8) is connected with one end of the 3rd resistance (9), the other end ground connection of the 3rd resistance (9), the anodal other end of field effect transistor (8) is connected with output voltage.
4. anti-overvoltage surge is protected control circuit as claimed in claim 2 or claim 3, it is characterized in that, described control circuit (I) comprises electric capacity (3), and described the first voltage-stabiliser tube (4) is in parallel with electric capacity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320403302.4U CN203415971U (en) | 2013-07-08 | 2013-07-08 | Anti-overvoltage surge protection control circuit designed based on field-effect transistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320403302.4U CN203415971U (en) | 2013-07-08 | 2013-07-08 | Anti-overvoltage surge protection control circuit designed based on field-effect transistor |
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| Publication Number | Publication Date |
|---|---|
| CN203415971U true CN203415971U (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320403302.4U Expired - Lifetime CN203415971U (en) | 2013-07-08 | 2013-07-08 | Anti-overvoltage surge protection control circuit designed based on field-effect transistor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467396A (en) * | 2014-09-10 | 2016-04-06 | 河南平原光电有限公司 | Pulse laser range finding control system and range finding operation method thereof |
| CN107634644A (en) * | 2017-10-31 | 2018-01-26 | 无锡汉神电气股份有限公司 | A kind of surge mu balanced circuit |
| CN108599124A (en) * | 2018-05-03 | 2018-09-28 | 北京市科通电子继电器总厂有限公司 | Control circuit, system and the integrated circuit of switching device |
| CN109378794A (en) * | 2018-10-18 | 2019-02-22 | 九江精密测试技术研究所 | A kind of protection circuit of fieldbus |
| 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 |
| CN112803360A (en) * | 2020-12-31 | 2021-05-14 | 广州极飞科技股份有限公司 | Surge protection circuit, surge protection method and battery power supply circuit |
| CN113422504A (en) * | 2021-07-06 | 2021-09-21 | 浙江瑞银电子有限公司 | Voltage stabilizing circuit based on bleeder resistor |
-
2013
- 2013-07-08 CN CN201320403302.4U patent/CN203415971U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467396A (en) * | 2014-09-10 | 2016-04-06 | 河南平原光电有限公司 | Pulse laser range finding control system and range finding operation method thereof |
| CN105467396B (en) * | 2014-09-10 | 2018-02-27 | 河南平原光电有限公司 | A kind of pulsed laser ranging control system and ranging operation method |
| CN107634644A (en) * | 2017-10-31 | 2018-01-26 | 无锡汉神电气股份有限公司 | A kind of surge mu balanced circuit |
| CN108599124A (en) * | 2018-05-03 | 2018-09-28 | 北京市科通电子继电器总厂有限公司 | Control circuit, system and the integrated circuit of switching device |
| CN109378794A (en) * | 2018-10-18 | 2019-02-22 | 九江精密测试技术研究所 | A kind of protection circuit of fieldbus |
| 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 |
| CN112803360A (en) * | 2020-12-31 | 2021-05-14 | 广州极飞科技股份有限公司 | Surge protection circuit, surge protection method and battery power supply circuit |
| CN113422504A (en) * | 2021-07-06 | 2021-09-21 | 浙江瑞银电子有限公司 | Voltage stabilizing circuit based on bleeder resistor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |