CN204168131U - A kind of high voltage source soft-start circuit - Google Patents
A kind of high voltage source soft-start circuit Download PDFInfo
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- CN204168131U CN204168131U CN201420571766.0U CN201420571766U CN204168131U CN 204168131 U CN204168131 U CN 204168131U CN 201420571766 U CN201420571766 U CN 201420571766U CN 204168131 U CN204168131 U CN 204168131U
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Abstract
The utility model relates to high voltage source technical field, a kind of high voltage source soft-start circuit soft-start circuit is disclosed, be a kind of energy control voltage delay startup output circuit, comprise input/output port, the first electric capacity C1, the second electric capacity C2, the first resistance R1, the second resistance R2, operational amplifier N1; Wherein first electric capacity C1 one end connects output voltage feedback sample end, connects the first resistance R1 simultaneously, and the other end connects input power ground; The inverting input of other end concatenation operation amplifier N1 of the first resistance R1 and one end of the second electric capacity C2, the other end of the second electric capacity C2 connects one end of the second resistance R2, the output of the other end concatenation operation amplifier N1 of the second resistance R2, the utility model can make High voltage output smoothly rise.Reaching rated value, high voltage overshoot phenomenon can not be produced when starting shooting.There is circuit simple, occupy small volume, and delay startup controlling functions can be realized preferably.
Description
Technical field
The utility model relates to high voltage source technical field, especially relates to a kind of high voltage source soft-start circuit.
Background technology
High voltage source is widely used in many high-quality precision and sophisticated technology fields, also constantly proposes new, higher requirement to the performance index of high voltage source.Because high voltage source output voltage is extra-high voltage, when high voltage source does not add soft-start circuit, in the moment of start, feedback no-voltage, benchmark is rated value, and operational amplifier exports as maximum; This voltage-controlled source exports, and make output moment also reach maximum, feedback has magnitude of voltage afterwards, and power supply regulates power supply to export according to feedback voltage, reaches rated value.The high voltage overshoot that start produces, can produce impacting with high pressure effect to custom system, easily burn out consumer products, power supply needs head it off.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of high voltage source soft-start circuit, makes High voltage output smoothly increase.Reaching rated value, high voltage overshoot phenomenon can not be produced when starting shooting.
In order to realize the object of above-mentioned technical problem, the utility model have employed following technical scheme:
A kind of high voltage source soft-start circuit, comprises the first electric capacity C1, the first resistance R1, the second electric capacity C2, the second resistance R2 and the first operational amplifier N1 and forms; Wherein: first electric capacity C1 one end connects output voltage feedback sample end, connect the first resistance R1 simultaneously, the other end connects input power ground, the inverting input of other end concatenation operation amplifier N1 of the first resistance R1 and one end of the second electric capacity C2, the other end of the second electric capacity C2 connects one end of the second resistance R2, the output of the other end concatenation operation amplifier N1 of the second resistance R2, and 3 pin of operational amplifier N1 connect reference voltage source, 8 pin connect supply power voltage, and 4 pin connect power supply ground.
By adopting technique scheme, the utility model has following beneficial effect:
A kind of high voltage source soft-start circuit of the utility model, can make High voltage output smoothly rise.Reaching rated value, high voltage overshoot phenomenon can not be produced when starting shooting.There is circuit simple, occupy small volume, and delay startup controlling functions can be realized preferably.
Accompanying drawing explanation
Fig. 1 is that operational amplifier output pin 1 exports typical waveform.
Fig. 2 is high voltage source soft-start circuit figure.
Embodiment
Embodiment
Below in conjunction with accompanying drawing, further explanation is explained to this patent.
Scheme of the present utility model as shown in Figure 2, is a kind of high voltage source soft-start circuit, is made up of the first electric capacity C1, the first resistance R1, the second electric capacity C2, the second resistance R2 and the first operational amplifier N1.Wherein: first electric capacity C1 one end connects output voltage feedback sample end, connect the first resistance R1 simultaneously, the other end connects input power ground, the inverting input of other end concatenation operation amplifier N1 of the first resistance R1 and one end of the second electric capacity C2, the other end of the second electric capacity C2 connects one end of the second resistance R2, the output of the other end concatenation operation amplifier N1 of the second resistance R2, and 3 pin of operational amplifier N1 connect reference voltage source, 8 pin connect supply power voltage, and 4 pin connect power supply ground.
First electric capacity C1 and the first resistance R1 forms feedback sample voltage filtering circuit, output ripple is not made to be brought into input circuit, second electric capacity C2, the second resistance R2 and the first operational amplifier composition soft-start circuit, make the waveform rising as shown in Figure 1 of operational amplifier output terminal voltage, thus the output of control power supply realizes soft start function.
Operation principle of the present utility model is: the first electric capacity C1 and the first resistance R1 forms feedback sample voltage filtering circuit, a good anti-phase input terminal voltage of quality can be provided for the first operational amplifier N1, homophase input voltage is reference voltage, after end of oppisite phase input voltage and in-phase end voltage compare, according to voltage extent, determine the voltage of operational amplifier output terminal, the regulating circuit that output end voltage consists of the second electric capacity C2 and the second resistance C2, make output end voltage ascending curve as shown in Figure 1, control the ascendant trend of power supply output when starting shooting, avoid occurring overshoot phenomenon.
Claims (1)
1. a high voltage source soft-start circuit soft-start circuit, is characterized in that: be a kind of energy control voltage delay startup output circuit, comprise input/output port, the first electric capacity C1, the second electric capacity C2, the first resistance R1, the second resistance R2, operational amplifier N1; Wherein:
First electric capacity C1 one end connects output voltage feedback sample end, connects the first resistance R1 simultaneously, and the other end connects input power ground; The inverting input of other end concatenation operation amplifier N1 of the first resistance R1 and one end of the second electric capacity C2, the other end of the second electric capacity C2 connects one end of the second resistance R2, the output of the other end concatenation operation amplifier N1 of the second resistance R2,3 pin of operational amplifier N1 connect reference voltage source, 8 pin connect supply power voltage, and 4 pin connect power supply ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571766.0U CN204168131U (en) | 2014-09-30 | 2014-09-30 | A kind of high voltage source soft-start circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571766.0U CN204168131U (en) | 2014-09-30 | 2014-09-30 | A kind of high voltage source soft-start circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204168131U true CN204168131U (en) | 2015-02-18 |
Family
ID=52541779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420571766.0U Expired - Fee Related CN204168131U (en) | 2014-09-30 | 2014-09-30 | A kind of high voltage source soft-start circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204168131U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319985A (en) * | 2014-09-30 | 2015-01-28 | 洛阳隆盛科技有限责任公司 | Slow startup circuit of high-voltage power supply, and work method |
| US10338620B2 (en) | 2017-11-15 | 2019-07-02 | Infineon Technologies Ag | Feedback circuit for regulation loops |
| CN110707916A (en) * | 2019-11-15 | 2020-01-17 | 创驱（上海）新能源科技有限公司 | Soft start circuit for switching power supply |
-
2014
- 2014-09-30 CN CN201420571766.0U patent/CN204168131U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319985A (en) * | 2014-09-30 | 2015-01-28 | 洛阳隆盛科技有限责任公司 | Slow startup circuit of high-voltage power supply, and work method |
| US10338620B2 (en) | 2017-11-15 | 2019-07-02 | Infineon Technologies Ag | Feedback circuit for regulation loops |
| CN110707916A (en) * | 2019-11-15 | 2020-01-17 | 创驱（上海）新能源科技有限公司 | Soft start circuit for switching power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20190930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |