CN204597774U - A kind of negative voltage transition circuit - Google Patents
A kind of negative voltage transition circuit Download PDFInfo
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- CN204597774U CN204597774U CN201520287662.1U CN201520287662U CN204597774U CN 204597774 U CN204597774 U CN 204597774U CN 201520287662 U CN201520287662 U CN 201520287662U CN 204597774 U CN204597774 U CN 204597774U
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Abstract
The utility model discloses a kind of negative voltage transition circuit, comprise chip U1, resistance R1, electric capacity C1, diode D1 and triode VT1, chip U1 pin 4 connects chip U1 pin 8, power supply VCC, triode VT2 collector electrode, resistance R1 and resistance R2 respectively, chip U1 pin 2 is the contact resistance R1 other end, ground capacity C1, resistance R3, diode D5 positive pole and chip U1 pin 6 respectively, chip U1 pin 5 connects diode D5 negative pole and ground capacity C2 respectively, chip U1 pin 1 ground connection.The utility model negative voltage transition circuit adopts NE555 as main control chip, and output end vo can export-5V direct current, and circuit structure is simple, uses electronic component cheap, is applicable to very much promoting the use of.
Description
Technical field
The utility model relates to a kind of change-over circuit, specifically a kind of negative voltage transition circuit.
Background technology
Existing negative voltage transition circuit must have independent charge pump circuit or Transformer Winding to provide, and circuit is complicated, and cost is higher, and generally uses the occasion load current demand of negative voltage little, is more the increase in the waste of material cost.
Utility model content
The purpose of this utility model is to provide a kind of circuit structure simple negative voltage transition circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of negative voltage transition circuit, comprise chip U1, resistance R1, electric capacity C1, diode D1 and triode VT1, described chip U1 pin 4 connects chip U1 pin 8 respectively, power supply VCC, triode VT2 collector electrode, resistance R1 and resistance R2, chip U1 pin 2 is the contact resistance R1 other end respectively, ground capacity C1, resistance R3, diode D5 positive pole and chip U1 pin 6, chip U1 pin 5 connects diode D5 negative pole and ground capacity C2 respectively, chip U1 pin 1 ground connection, chip U1 pin 7 connecting triode VT1 emitter, the triode VT1 collector electrode contact resistance R3 other end, triode VT1 base stage is the contact resistance R2 other end and diode D3 negative pole respectively, diode D3 positive pole connects ground capacity C3 respectively, diode D4 positive pole and output end vo, diode D4 negative pole connects ground connection diode D2 positive pole and electric capacity C4 respectively, the electric capacity C4 other end connects diode D1 positive pole and triode VT2 emitter respectively, triode VT2 base stage contact resistance R4, the resistance R4 other end connects chip U1 pin 3 and diode D1 negative pole respectively, described chip U1 model is NE555.
As the utility model further scheme: described power supply VCC voltage is 12V.
Compared with prior art, the beneficial effects of the utility model are: the utility model negative voltage transition circuit adopts NE555 as main control chip, and output end vo can export-5V direct current, and circuit structure is simple, use electronic component is cheap, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of negative voltage transition circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of negative voltage transition circuit, comprise chip U1, resistance R1, electric capacity C1, diode D1 and triode VT1, chip U1 pin 4 connects chip U1 pin 8 respectively, power supply VCC, triode VT2 collector electrode, resistance R1 and resistance R2, chip U1 pin 2 is the contact resistance R1 other end respectively, ground capacity C1, resistance R3, diode D5 positive pole and chip U1 pin 6, chip U1 pin 5 connects diode D5 negative pole and ground capacity C2 respectively, chip U1 pin 1 ground connection, chip U1 pin 7 connecting triode VT1 emitter, the triode VT1 collector electrode contact resistance R3 other end, triode VT1 base stage is the contact resistance R2 other end and diode D3 negative pole respectively, diode D3 positive pole connects ground capacity C3 respectively, diode D4 positive pole and output end vo, diode D4 negative pole connects ground connection diode D2 positive pole and electric capacity C4 respectively, the electric capacity C4 other end connects diode D1 positive pole and triode VT2 emitter respectively, triode VT2 base stage contact resistance R4, the resistance R4 other end connects chip U1 pin 3 and diode D1 negative pole respectively, chip U1 model is NE555.
Power supply VCC voltage is 12V.
Operation principle of the present utility model is: refer to Fig. 1, chip U1, resistance R1, the elements such as electric capacity C1 and triode VT1 form a multivibrator, frequency of oscillation is determined by resistance R1 and electric capacity C1, electric capacity C1 is charged by resistance R1, when the current potential of 6 pin of chip U1 is charged to higher than its threshold level 2/3, chip U1 is reset, the 3 pin output low levels of chip U1, electric charge on electric capacity C1 is by the 7 pin discharge tube electric discharges of resistance R3 and triode VT1 to chip U1, when be discharged to lower than 2 pin triggering level 1/3 time, chip U1 is set, chip U1 exports high level, each high level makes triode VT2 conducting, and electric capacity C4 is charged, when 3 pin of chip U1 are low level, electric capacity C4 discharges, then Charger transfer is to electric capacity C3, thus obtain the output of-5V DC voltage-stabilizing.Diode D5 is voltage stabilizing didoe, and when-5V output voltage impels diode D5 conducting, triode VT1 remain off state, when electric current makes electric capacity C3 discharge into a certain degree, diode D5 ends, and triode VT1 is with logical, and now electric capacity C1 starts again charging.
Claims (2)
1. a negative voltage transition circuit, comprise chip U1, resistance R1, electric capacity C1, diode D1 and triode VT1, it is characterized in that, described chip U1 pin 4 connects chip U1 pin 8 respectively, power supply VCC, triode VT2 collector electrode, resistance R1 and resistance R2, chip U1 pin 2 is the contact resistance R1 other end respectively, ground capacity C1, resistance R3, diode D5 positive pole and chip U1 pin 6, chip U1 pin 5 connects diode D5 negative pole and ground capacity C2 respectively, chip U1 pin 1 ground connection, chip U1 pin 7 connecting triode VT1 emitter, the triode VT1 collector electrode contact resistance R3 other end, triode VT1 base stage is the contact resistance R2 other end and diode D3 negative pole respectively, diode D3 positive pole connects ground capacity C3 respectively, diode D4 positive pole and output end vo, diode D4 negative pole connects ground connection diode D2 positive pole and electric capacity C4 respectively, the electric capacity C4 other end connects diode D1 positive pole and triode VT2 emitter respectively, triode VT2 base stage contact resistance R4, the resistance R4 other end connects chip U1 pin 3 and diode D1 negative pole respectively, described chip U1 model is NE555.
2. negative voltage transition circuit according to claim 1, is characterized in that, described power supply VCC voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287662.1U CN204597774U (en) | 2015-05-06 | 2015-05-06 | A kind of negative voltage transition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287662.1U CN204597774U (en) | 2015-05-06 | 2015-05-06 | A kind of negative voltage transition circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204597774U true CN204597774U (en) | 2015-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520287662.1U Expired - Fee Related CN204597774U (en) | 2015-05-06 | 2015-05-06 | A kind of negative voltage transition circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204597774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108466554A (en) * | 2018-04-21 | 2018-08-31 | 浙江合众新能源汽车有限公司 | BMS multifunctional unit electric power management circuits |
-
2015
- 2015-05-06 CN CN201520287662.1U patent/CN204597774U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108466554A (en) * | 2018-04-21 | 2018-08-31 | 浙江合众新能源汽车有限公司 | BMS multifunctional unit electric power management circuits |
| CN108466554B (en) * | 2018-04-21 | 2023-10-24 | 合众新能源汽车股份有限公司 | BMS multifunctional integrated power management circuit |
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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: 20150826 Termination date: 20160506 |
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| CF01 | Termination of patent right due to non-payment of annual fee |