CN204738991U - Fan control and protection circuit - Google Patents
Fan control and protection circuit Download PDFInfo
- Publication number
- CN204738991U CN204738991U CN201520355012.6U CN201520355012U CN204738991U CN 204738991 U CN204738991 U CN 204738991U CN 201520355012 U CN201520355012 U CN 201520355012U CN 204738991 U CN204738991 U CN 204738991U
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- Prior art keywords
- fan
- triode
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- oxide
- metal
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- 230000004224 protection Effects 0.000 title abstract description 11
- 239000004065 semiconductor Substances 0.000 claims description 30
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 210000001699 lower leg Anatomy 0.000 description 1
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- Electronic Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The utility model discloses a fan control and protection circuit, this circuit includes MOS pipe Q1 and triode TR1, triode TR1's base and fan control signal are connected, triode TR1's emitter ground, the collecting electrode and MOS pipe Q1's the grid of triode are connected, positive supply VCC connects on MOS pipe Q1's source electrode, MOS pipe Q1's drain electrode is connected on fan connector interface J1's anodal foot, fan connector interface J1's negative pole pin ground connection, MOS pipe Q1's grid passes through the pull -up ohmic connection on positive supply VCC. The utility model discloses utilize special circuit structure to carry out fan motion control, realize the very reliable effectual control of fan, can turn off the fan in time spent not, practice thrift the electric energy, also carried out some protections to the circuit of control fan simultaneously to the factor of safety of circuit own is high, lets the user set one's mind at rest and also saves worry, and protect fragile, more environmental protection and safety.
Description
Technical field
The utility model discloses a kind of control switch circuit, particularly a kind of fan control and protective circuit.
Background technique
Along with the development of technology, the chip volume on present circuit board does less and less, and function is done more and more, and thing followed problem is exactly, and the power consumption of chip is too large, so just makes the heat radiation of chip become a very large problem.At present, the main path of head it off is, the circuit board that power consumption is larger can add a fan auxiliary heat dissipation.In some equipment now, some fans are that simple energising operates, and utilize energising and power-off to carry out motion control at most, and control mode is very simple, and doing the short time like this may be no problem, but gets off for a long time or can there is certain risk.
Summary of the invention
Only have energising and power-off to control for the above-mentioned radiation fan of the prior art mentioned, the simple shortcoming of control mode, the utility model provides a kind of fan control and protective circuit, and it adopts the control of secondary switch control circuit realization to fan.
The technological scheme that the utility model solves the employing of its technical problem is: a kind of fan control and protective circuit; this circuit comprises metal-oxide-semiconductor Q1 and triode TR1; the base stage of triode TR1 is connected with fan control signal; the grounded-emitter connection of triode TR1; the collector electrode of triode is connected with the grid of metal-oxide-semiconductor Q1; positive supply VCC is connected on the source electrode of metal-oxide-semiconductor Q1; the drain electrode of metal-oxide-semiconductor Q1 is connected on the positive pole pin of fan connector interface J1; the negative pole pin ground connection of fan connector interface J1, the grid of metal-oxide-semiconductor Q1 is connected on positive supply VCC by pull-up resistor.
The technological scheme that the utility model solves the employing of its technical problem further comprises:
Reference diode D9. is serially connected with between the drain electrode of described metal-oxide-semiconductor Q1 and ground
Current-limiting resistance R1. is serially connected with between described positive supply VCC and the source electrode of metal-oxide-semiconductor Q1
Described fan connector interface J1 is also provided with fan motion testing signal interface.
The beneficial effects of the utility model are: the utility model utilizes special circuit structure to carry out fan motion control; realize the very reliable and effective control of fan; can the used time turn off fan; saving power; also some protections have been carried out to the circuit controlling fan simultaneously; and the safety coefficient of circuit own is high, allow user is relieved also to save worry.The utility model is the support circuit being applicable to fan control, carries out fan swicth control, and protects vulnerable point, more environmental protection and safety.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
The present embodiment is the utility model preferred implementation, and other its principles all are identical with the present embodiment or approximate with basic structure, all within the utility model protection domain.
The utility model, on fan control circuitry, adopts the safety consciousness of power power-supply and control signal being kept apart, and utilizes diode to carry out the thought of afterflow protection, realizes the control to fan.
Please refer to accompanying drawing 1, the utility model mainly comprises switch control module and protective circuit module, in the present embodiment, switch control module comprises metal-oxide-semiconductor Q1 and triode TR1, in the present embodiment, triode TR1 adopts NPN type triode, base stage and FAN_control(and the fan control signal of triode TR1) be connected, the grounded-emitter connection of triode TR1, the collector electrode of triode is connected with the grid of metal-oxide-semiconductor Q1, control the break-make of metal-oxide-semiconductor Q1, positive supply VCC is connected on the source electrode of metal-oxide-semiconductor Q1, the drain electrode of metal-oxide-semiconductor Q1 is power output end, be connected on the positive supply of fan, in the present embodiment, the drain electrode of metal-oxide-semiconductor Q1 is connected on first pin of fan connector interface J1, the tripod ground connection of fan connector interface J1, in the present embodiment, the crus secunda of fan connector interface J1 connects fan motion testing signal (i.e. FAN_INT, fan itself is needed to support this function), circuit does not do what process.In the utility model, adopt triode TR1 and metal-oxide-semiconductor Q1 to keep apart power power-supply and control signal, can effectively prevent them from interfering with each other.If be directly placed on same element by control signal and power power-supply, very easily after luminous element fault, positive supply VCC is caused to burn out the problem of control signal pin.
In the present embodiment, the drain electrode of metal-oxide-semiconductor Q1 is serially connected with reference diode D9 over the ground, diode D9 is fly-wheel diode, when closing down fan, is first that control end metal-oxide-semiconductor Q1 can turn off, but now fan is also in rotation, also can output current on first pin of fan connector interface J1, the effect of diode D9 is just to provide the path of an electric current, if do not have diode D9, a negative voltage over the ground can be formed at first pin of fan connector interface J1, very easily damage components and parts above.
In the present embodiment; current-limiting resistance R1 is connected with between positive supply VCC and the source electrode of metal-oxide-semiconductor Q1; current-limiting resistance R1 adopts 10 Ω resistance; positive supply VCC is made to be conducting on fan through current-limiting resistance R1; make fan motion; the moment act as starting of current-limiting resistance R1 carries out current-limiting protection, in order to avoid the excessive damage element of inrush current.Between positive supply VCC and the grid of metal-oxide-semiconductor Q1, be connected with pull-up resistor R2, the grid voltage of metal-oxide-semiconductor Q1 can be drawn high by pull-up resistor R2.
The utility model in use, during normality, the grid potential of metal-oxide-semiconductor Q1 is pulled up resistance R2 and draws high, and metal-oxide-semiconductor Q1 ends, stopping fan rotation, during use, when FAN_control signal is high, triode TR1 conducting, the grid of metal-oxide-semiconductor Q1 is dragged down, metal-oxide-semiconductor Q1 conducting, positive supply VCC powers to fan.
The utility model utilizes special circuit structure to carry out fan motion control; realize the very reliable and effective control of fan; can the used time turn off fan; saving power; also some protections have been carried out to the circuit controlling fan simultaneously; and the safety coefficient of circuit own is high, allow user is relieved also to save worry.The utility model is the support circuit being applicable to fan control, carries out fan swicth control, and protects vulnerable point, more environmental protection and safety.
Claims (4)
1. a fan control and protective circuit; it is characterized in that: described circuit comprises metal-oxide-semiconductor Q1 and triode TR1; the base stage of triode TR1 is connected with fan control signal; the grounded-emitter connection of triode TR1; the collector electrode of triode is connected with the grid of metal-oxide-semiconductor Q1; positive supply VCC is connected on the source electrode of metal-oxide-semiconductor Q1; the drain electrode of metal-oxide-semiconductor Q1 is connected on the positive pole pin of fan connector interface J1; the negative pole pin ground connection of fan connector interface J1, the grid of metal-oxide-semiconductor Q1 is connected on positive supply VCC by pull-up resistor.
2. fan control according to claim 1 and protective circuit, is characterized in that: be serially connected with reference diode D9 between the drain electrode of described metal-oxide-semiconductor Q1 and ground.
3. fan control according to claim 1 and 2 and protective circuit, is characterized in that: be serially connected with current-limiting resistance R1 between described positive supply VCC and the source electrode of metal-oxide-semiconductor Q1.
4. fan control according to claim 1 and 2 and protective circuit, is characterized in that: described fan connector interface J1 is also provided with fan motion testing signal interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520355012.6U CN204738991U (en) | 2015-05-28 | 2015-05-28 | Fan control and protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520355012.6U CN204738991U (en) | 2015-05-28 | 2015-05-28 | Fan control and protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204738991U true CN204738991U (en) | 2015-11-04 |
Family
ID=54420730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520355012.6U Expired - Fee Related CN204738991U (en) | 2015-05-28 | 2015-05-28 | Fan control and protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204738991U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257579A (en) * | 2015-11-06 | 2016-01-20 | 许继电源有限公司 | Speed governing draught fan |
| CN106286370A (en) * | 2016-10-27 | 2017-01-04 | 郑州云海信息技术有限公司 | A kind of method optimizing rotation speed of the fan monitoring precision |
| CN110273853A (en) * | 2019-05-28 | 2019-09-24 | 苏州伟创电气设备技术有限公司 | A kind of fan control circuitry and frequency converter |
-
2015
- 2015-05-28 CN CN201520355012.6U patent/CN204738991U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257579A (en) * | 2015-11-06 | 2016-01-20 | 许继电源有限公司 | Speed governing draught fan |
| CN105257579B (en) * | 2015-11-06 | 2017-05-31 | 许继电源有限公司 | A kind of adjustable speed fan |
| CN106286370A (en) * | 2016-10-27 | 2017-01-04 | 郑州云海信息技术有限公司 | A kind of method optimizing rotation speed of the fan monitoring precision |
| CN110273853A (en) * | 2019-05-28 | 2019-09-24 | 苏州伟创电气设备技术有限公司 | A kind of fan control circuitry and frequency converter |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 |