CN204258286U - Overvoltage suppression circuit - Google Patents
Overvoltage suppression circuit Download PDFInfo
- Publication number
- CN204258286U CN204258286U CN201420746517.0U CN201420746517U CN204258286U CN 204258286 U CN204258286 U CN 204258286U CN 201420746517 U CN201420746517 U CN 201420746517U CN 204258286 U CN204258286 U CN 204258286U
- Authority
- CN
- China
- Prior art keywords
- voltage
- pliotron
- circuit
- stabiliser tube
- power supply
- 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
Links
Abstract
The utility model discloses a kind of overvoltage suppression circuit, airborne power supply input VIN is connected with pliotron collector electrode, pliotron transmitting integrates as output voltage VO UT, and airborne power supply input VIN is connected through the negative pole of current-limiting resistance with pliotron base stage, voltage-stabiliser tube simultaneously; The plus earth of voltage-stabiliser tube.Circuit of the present utility model carries out over-voltage suppression available protecting subordinate circuit at power input; Circuit structure is simple, reduces the weight of circuit, volume and cost; Function-stable, reliable.
Description
Technical field
The utility model belongs to circuit field, is the circuit of overvoltage surge and resistance to peak voltage problem in a kind of special disposal airborne electronic equipment product power adaptation.Various airborne electronic equipment product can be widely used in.
Background technology
In airborne electronic equipment product; because airborne power supply is unstable; often there is the phenomenon such as overvoltage surge and peak voltage; have a strong impact on the normal work of electronic product; simultaneously because airborne products is to the requirement of the aspect such as weight, volume, the simple and overvoltage crowbar of reliable in function of a kind of structure of utility model is very important.
Utility model content
The purpose of this utility model is to provide a kind of structure simple and the overvoltage crowbar of reliable in function, to increase the adaptability of airborne electronic equipment product to airborne power supply.
The technical solution of the utility model:
A kind of overvoltage suppression circuit, it is characterized in that, airborne power supply input VIN is connected with pliotron collector electrode, and pliotron transmitting integrates as output voltage VO UT, and airborne power supply input VIN is connected through the negative pole of current-limiting resistance with pliotron base stage, voltage-stabiliser tube simultaneously; The plus earth of voltage-stabiliser tube.
Pliotron base stage is also through charging capacitor ground connection.
The magnitude of voltage of output voltage VO UT is less than the voltage stabilizing value of voltage-stabiliser tube all the time.
Overvoltage suppression circuit is made up of triode, voltage-stabiliser tube and current-limiting resistance, and when voltage is within the scope of secure threshold, voltage-stabiliser tube ends, by the on-off action transfer overvoltage of triode; When there is overvoltage surge or peak voltage, voltage-stabiliser tube reverse-conducting, now triode operation is at magnifying state, and output voltage is slightly less than the voltage stabilizing value of voltage-stabiliser tube, to reach the object of over-voltage suppression.
Compared with prior art, its beneficial effect is the utility model:
Circuit of the present utility model carries out over-voltage suppression available protecting subordinate circuit at power input; Circuit structure is simple, reduces the weight of circuit, volume and cost; Function-stable, reliable.
Accompanying drawing explanation
Fig. 1 is overvoltage suppression circuit schematic diagram.
Embodiment
Implement to be described in further detail to the best of the present utility model below in conjunction with accompanying drawing:
As shown in Figure 1: be overvoltage suppression circuit schematic diagram shown in figure.In figure, VIN is airborne power supply input, airborne power supply input VIN is connected with pliotron Q1 collector electrode, and pliotron Q1 transmitting integrates as output voltage VO UT, and airborne power supply input VIN is connected with the negative pole of pliotron Q1 base stage, voltage-stabiliser tube V1 through resistance R1 simultaneously; The plus earth GND of voltage-stabiliser tube V1; Pliotron Q1 base stage is through electric capacity C1 ground connection.Normal condition, namely when voltage VIN is less than the voltage stabilizing value of voltage-stabiliser tube V1, pliotron Q1 conducting, voltage is by the emitter output voltage VO UT of pliotron Q1; Over-voltage suppression state, namely there is overvoltage surge or have peak voltage through out-of-date, voltage-stabiliser tube V1 reverse-conducting, the base voltage of pliotron Q1 equals the voltage stabilizing value of voltage-stabiliser tube V1, now, the voltage stabilizing value that the magnitude of voltage of output voltage VO UT equals voltage-stabiliser tube V1 deducts the pressure drop of pliotron Q1 base stage and emitter.So the magnitude of voltage of output voltage VO UT is all less than the voltage stabilizing value of voltage-stabiliser tube V1 forever, the circuit after protecting output voltage VO UT well.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection range of the present utility model.
Claims (3)
1. an overvoltage suppression circuit, is characterized in that, airborne power supply input is connected with pliotron collector electrode, and pliotron transmitting integrates as output voltage, and airborne power supply input is connected through the negative pole of current-limiting resistance with pliotron base stage, voltage-stabiliser tube simultaneously; The plus earth of voltage-stabiliser tube.
2. overvoltage suppression circuit according to claim 1, is characterized in that, pliotron base stage is also through charging capacitor ground connection.
3. overvoltage suppression circuit according to claim 1, is characterized in that, the magnitude of voltage of output voltage is less than the voltage stabilizing value of voltage-stabiliser tube all the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746517.0U CN204258286U (en) | 2014-12-03 | 2014-12-03 | Overvoltage suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746517.0U CN204258286U (en) | 2014-12-03 | 2014-12-03 | Overvoltage suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204258286U true CN204258286U (en) | 2015-04-08 |
Family
ID=52962554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420746517.0U Active CN204258286U (en) | 2014-12-03 | 2014-12-03 | Overvoltage suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204258286U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849926A (en) * | 2017-01-06 | 2017-06-13 | 中国航天电子技术研究院 | A kind of pressure nmos switch control circuit wide |
| CN109104085A (en) * | 2018-10-08 | 2018-12-28 | 北方电子研究院安徽有限公司 | A kind of wide input voltage power supply unit |
-
2014
- 2014-12-03 CN CN201420746517.0U patent/CN204258286U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849926A (en) * | 2017-01-06 | 2017-06-13 | 中国航天电子技术研究院 | A kind of pressure nmos switch control circuit wide |
| CN109104085A (en) * | 2018-10-08 | 2018-12-28 | 北方电子研究院安徽有限公司 | A kind of wide input voltage power supply unit |
| CN109104085B (en) * | 2018-10-08 | 2020-06-23 | 北方电子研究院安徽有限公司 | Wide input voltage power supply device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104362608A (en) | Overvoltage suppression and under-voltage surge detection circuit | |
| CN204290291U (en) | The automatically controlled thyristor excess voltage protection of a kind of extra-high voltage direct-current transmission | |
| CN102332704B (en) | Switching power supply input undervoltage or overvoltage protection circuit | |
| CN103475200A (en) | Anti-surge circuit | |
| CN204258286U (en) | Overvoltage suppression circuit | |
| CN104393760B (en) | The positive negative output low voltage difference with short-circuit protection function adjusts circuit | |
| CN203942276U (en) | A kind of lightning protection circuit | |
| CN103475205B (en) | Protective circuit | |
| CN202712837U (en) | Input DC anti-peak and overvoltage surge circuit | |
| CN202771295U (en) | Voltage stabilizing circuit | |
| CN203233162U (en) | Surge protection device | |
| CN203398985U (en) | Anti-surge circuit | |
| CN203312785U (en) | Lightning protection circuit of telemetry terminal machine | |
| CN203632542U (en) | Soft-start electronic switching circuit | |
| CN108288850B (en) | Voltage conversion input/output low-end conduction protection circuit | |
| CN204517360U (en) | Excess voltage protection | |
| CN210490447U (en) | Overvoltage protection circuit capable of realizing high-low voltage detection | |
| CN205080676U (en) | Electronic circuit high pressure warning protection circuit | |
| CN204464990U (en) | Anti-lightning strike LED drive power circuit | |
| CN205160347U (en) | Linear start control circuit of switching power supply output voltage | |
| CN105576626A (en) | Automobile instrument power supply protection circuit | |
| CN203840195U (en) | Device for preventing overshoot current | |
| CN204681147U (en) | A kind of constant-current charging circuit of adjustable current | |
| CN203911467U (en) | Communication base station controller | |
| CN204316627U (en) | Anti-lightning strike signal divider circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230817 Address after: No. 2016, Tanghe Road, economic development zone, Bengbu City, Anhui Province 233030 Patentee after: 214 INSTITUTE OF CHINA NORTH INDUSTRIES GROUP Address before: 215163 No. 89 Longshan Road, hi tech Zone, Suzhou, Jiangsu Patentee before: Suzhou R & D center of 214 Institute of China North Industries Group |
|
| TR01 | Transfer of patent right |