CN203882883U - Drive circuit with built-in relay - Google Patents
Drive circuit with built-in relay Download PDFInfo
- Publication number
- CN203882883U CN203882883U CN201420090707.1U CN201420090707U CN203882883U CN 203882883 U CN203882883 U CN 203882883U CN 201420090707 U CN201420090707 U CN 201420090707U CN 203882883 U CN203882883 U CN 203882883U
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- Prior art keywords
- resistance
- triode
- utmost point
- rectifier diode
- drive circuit
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- Expired - Lifetime
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- 230000000694 effects Effects 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a drive circuit with a built-in relay. The drive circuit with the built-in relay consists of resistors R1, R2, R3, R4, R5, R6, R7 and R8, transistors Q1, Q2, Q3, Q4, Q5 and Q6, and rectifier diodes VD1 and VD2. The above drive circuit with the built-in relay is high in operating reliability.
Description
Technical field
The utility model relates to a kind of drive circuit, is specifically a kind of built-in relay drive circuit.
Background technology
The built-in relay drive circuit of prior art is comprised of a plurality of resistance and a plurality of triode.The built-in relay drive circuit of this structure is when a control end input high level, and another one control end must input low level.And if because wrong line makes two control ends simultaneously during input high level, easily cause triode to burn out, and then damage relay.Therefore, from above description, can find out, the functional reliability of the built-in relay drive circuit of prior art is poor.
Utility model content
The technical problems to be solved in the utility model is that the built-in relay drive circuit that a kind of functional reliability is high is provided.
The technical solution of the utility model is, a kind of built-in relay drive circuit is provided, and comprises resistance R 1, R2, R3, R4, R5, R6, R7, R8, triode Q1, Q2, Q3, Q4, Q5, Q6, rectifier diode VD1, VD2; One end of described resistance R 1 is connected with one end of resistance R 2; The other end of described resistance R 2 is connected with common ground end; The other end of described resistance R 1 is connected with the b utmost point of triode Q1; The c utmost point of described triode Q1 is connected with the b utmost point of one end of resistance R 5, triode Q3; The e utmost point of described triode Q1 is connected with the b utmost point of one end of resistance R 6, triode Q4; The e utmost point of described triode Q3 and the anodic bonding of rectifier diode VD1; The c utmost point of described triode Q4 is connected with the negative electrode of rectifier diode VD1; The c utmost point of described triode Q3, the other end of resistance R 5 are connected with public power VDD; The e utmost point of described triode Q4, the other end of resistance R 6 are connected with common ground end; One end of described resistance R 3 is connected with one end of resistance R 4; The other end of described resistance R 4 is connected with common ground end; The other end of described resistance R 3 is connected with the b utmost point of triode Q2; The c utmost point of described triode Q2 is connected with the b utmost point of one end of resistance R 7, triode Q6; The e utmost point of described triode Q2 is connected with the b utmost point of one end of resistance R 8, triode Q5; The e utmost point of described triode Q6 and the anodic bonding of rectifier diode VD2; The c utmost point of described triode Q5 is connected with the negative electrode of rectifier diode VD1; The c utmost point of described triode Q6, the other end of resistance R 7 are connected with public power VDD; The e utmost point of described triode Q5, the other end of resistance R 8 are connected with common ground end.
Described built-in relay drive circuit also comprises the TVS pipe VD3 of overvoltage protection effect together, and the anode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD1, and the negative electrode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD2.
Adopt after above structure, the utility model compared with prior art, has the following advantages:
If the built-in relay drive circuit of the utility model is because wrong line makes two control ends simultaneously during input high level, rectifier diode VD1 can guarantee when triode Q3 or one of them triode conducting of Q6, electric current on the transmitting pin of another one triode is oppositely ended, thereby play a protective role; Rectifier diode VD2 can guarantee when triode Q4 or one of them triode conducting of Q5, the electric current on the transmitting pin of another one triode oppositely ended, thereby play a protective role; Like this, not only avoid burning out of triode, and guaranteed the normal use of relay.Therefore from above description, can find out, the functional reliability of the built-in relay drive circuit of the utility model is higher.
As improvement, described built-in relay drive circuit also comprises the TVS pipe VD3 of overvoltage protection effect together, and the anode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD1, and the negative electrode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD2.This TVS pipe can play overvoltage protection effect, to prevent that the coil of relay is burned.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the built-in relay drive circuit of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of built-in relay drive circuit of the utility model, comprises resistance R 1, R2, R3, R4, R5, R6, R7, R8, triode Q1, Q2, Q3, Q4, Q5, Q6, rectifier diode VD1, VD2; One end of described resistance R 1 is connected with one end of resistance R 2, and one end of one end of resistance R 1 and resistance R 2 is also as a control signal input of relay, and the A in Fig. 1 holds; One end of one end of resistance R 3 and resistance R 4 is also as the another one control signal input of relay, and the B in Fig. 1 holds; The other end of described resistance R 2 is connected with common ground end; The other end of described resistance R 1 is connected with the b utmost point of triode Q1; The c utmost point of described triode Q1 is connected with the b utmost point of one end of resistance R 5, triode Q3; The e utmost point of described triode Q1 is connected with the b utmost point of one end of resistance R 6, triode Q4; The e utmost point of described triode Q3 and the anodic bonding of rectifier diode VD1; The c utmost point of described triode Q4 is connected with the negative electrode of rectifier diode VD1; The c utmost point of described triode Q3, the other end of resistance R 5 are connected with public power VDD; The e utmost point of described triode Q4, the other end of resistance R 6 are connected with common ground end; One end of described resistance R 3 is connected with one end of resistance R 4; The other end of described resistance R 4 is connected with common ground end; The other end of described resistance R 3 is connected with the b utmost point of triode Q2; The c utmost point of described triode Q2 is connected with the b utmost point of one end of resistance R 7, triode Q6; The e utmost point of described triode Q2 is connected with the b utmost point of one end of resistance R 8, triode Q5; The e utmost point of described triode Q6 and the anodic bonding of rectifier diode VD2; The c utmost point of described triode Q5 is connected with the negative electrode of rectifier diode VD1; The c utmost point of described triode Q6, the other end of resistance R 7 are connected with public power VDD; The e utmost point of described triode Q5, the other end of resistance R 8 are connected with common ground end.
Described built-in relay drive circuit also comprises the TVS pipe VD3 of overvoltage protection effect together, and the anode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD1, and the negative electrode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD2.The output that the two ends of TVS pipe VD3 be this built-in relay drive circuit, i.e. QA in Fig. 1, QB, QA, QB are used for and being connected of relay coil.
Below only with regard to most preferred embodiment of the present utility model, be described, but can not be interpreted as it is limitations on claims.The utility model is not limited only to above embodiment, and its concrete structure allows to change.In every case the various variations of doing in the protection range of the utility model independent claims are all in protection range of the present utility model.
Claims (1)
1. a built-in relay drive circuit, is characterized in that: comprise resistance R 1, R2, R3, R4, R5, R6, R7, R8, triode Q1, Q2, Q3, Q4, Q5, Q6, rectifier diode VD1, VD2; One end of described resistance R 1 is connected with one end of resistance R 2; The other end of described resistance R 2 is connected with common ground end; The other end of described resistance R 1 is connected with the b utmost point of triode Q1; The c utmost point of described triode Q1 is connected with the b utmost point of one end of resistance R 5, triode Q3; The e utmost point of described triode Q1 is connected with the b utmost point of one end of resistance R 6, triode Q4; The e utmost point of described triode Q3 and the anodic bonding of rectifier diode VD1; The c utmost point of described triode Q4 is connected with the negative electrode of rectifier diode VD1; The c utmost point of described triode Q3, the other end of resistance R 5 are connected with public power VDD; The e utmost point of described triode Q4, the other end of resistance R 6 are connected with common ground end; One end of described resistance R 3 is connected with one end of resistance R 4; The other end of described resistance R 4 is connected with common ground end; The other end of described resistance R 3 is connected with the b utmost point of triode Q2; The c utmost point of described triode Q2 is connected with the b utmost point of one end of resistance R 7, triode Q6; The e utmost point of described triode Q2 is connected with the b utmost point of one end of resistance R 8, triode Q5; The e utmost point of described triode Q6 and the anodic bonding of rectifier diode VD2; The c utmost point of described triode Q5 is connected with the negative electrode of rectifier diode VD1; The c utmost point of described triode Q6, the other end of resistance R 7 are connected with public power VDD; The e utmost point of described triode Q5, the other end of resistance R 8 are connected with common ground end; Described built-in relay drive circuit also comprises the TVS pipe VD3 of overvoltage protection effect together, and the anode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD1, and the negative electrode of described TVS pipe VD3 is connected with the negative electrode of rectifier diode VD2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420090707.1U CN203882883U (en) | 2014-02-28 | 2014-02-28 | Drive circuit with built-in relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420090707.1U CN203882883U (en) | 2014-02-28 | 2014-02-28 | Drive circuit with built-in relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203882883U true CN203882883U (en) | 2014-10-15 |
Family
ID=51683357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420090707.1U Expired - Lifetime CN203882883U (en) | 2014-02-28 | 2014-02-28 | Drive circuit with built-in relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203882883U (en) |
-
2014
- 2014-02-28 CN CN201420090707.1U patent/CN203882883U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 315191 Yinzhou Industrial Park, Zhejiang, Ningbo, Yinzhou District, Ningbo Patentee after: NINGBO SANXING MEDICAL & ELECTRIC Co.,Ltd. Address before: 315131, AUX Industrial Park, Mingguang North Road, Jiangshan Town, Ningbo, Yinzhou District, Zhejiang 1166, China Patentee before: NINGBO SANXING ELECTRIC Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |
|
| CX01 | Expiry of patent term |