CN104731297A - Computer system protective circuit - Google Patents
Computer system protective circuit Download PDFInfo
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- CN104731297A CN104731297A CN201310715359.2A CN201310715359A CN104731297A CN 104731297 A CN104731297 A CN 104731297A CN 201310715359 A CN201310715359 A CN 201310715359A CN 104731297 A CN104731297 A CN 104731297A
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- door
- input end
- computer system
- connects
- resistance
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Abstract
A computer system protective circuit comprises a controller, a fan connector connected with a fan, a power-on button, a platform controller, a detection chip and an AND gate. A preset value is stored in the detection chip. A pulse pin of the fan connector is connected with the controller. A voltage pin of the fan connector is connected with a first voltage source. A speed pin of the fan connector is connected with the input end of the detection chip. The output end of the detection chip is connected with the first input end of the AND gate; the second input end of the AND gate is connected with the power-on key; the voltage end of the AND gate is connected with a second voltage source; the output end of the AND gate is connected with the input end of the platform controller; the output end of the platform controller is connected with a power supply. The computer system protective circuit can prevent a computer system from being damaged when the fan has a failure.
Description
Technical field
The present invention relates to a kind of computer system protection circuit.
Background technology
In computer system, fan plays an important role, if stopping fan rotation or rotate comparatively slow, then the heat in computer system can not be distributed in time, may cause computer system due to temperature too high and damage.
Summary of the invention
In view of this, be necessary to provide a kind of computer system protection circuit, when breaking down to prevent fan, described computer system is destroyed.
A kind of computer system protection circuit, to be arranged on a mainboard and to be connected with a power supply unit, described power supply unit is described main board power supply, described computer system protection circuit comprises a controller, the fan connector of one connection fan, one starting key, one platform controller, one detecting chip and one and door, a preset value is stored in described detecting chip, the pulse pin of described fan connector connects described controller, the voltage pin of described fan connector connects one first voltage source, the grounding pin ground connection of described fan connector, the speed pin of described fan connector connects the input end of described detecting chip, the output terminal of described detecting chip connects first input end that is described and door, the described starting key be connected with the second input end of door on described mainboard, describedly be connected one second voltage source with the voltage end of door, the described earth terminal ground connection with door, the described input end being connected described platform controller with the output terminal of door, the output terminal of described platform controller connects described power supply unit, when after described mainboard electrifying startup, when the rotating speed of the fan that described detecting chip detects on described fan connector is more than or equal to described preset value, described detecting chip exports a high level signal to the described first input end with door, describedly receive a high level signal with the second input end of door from described starting key, the described high level signal that exports with the output terminal of door is to described platform controller, and controlling described power supply unit to make described platform controller provides voltage to described mainboard, when the rotation speed of the fan that described detecting chip detects is less than described preset value, described detecting chip exports a low level signal to the described first input end with door, describedly receive a high level signal with the second input end of door from described starting key, the described low level signal that exports with the output terminal of door is to described platform controller, and controlling described power supply unit to make described platform controller does not provide voltage to described mainboard.
Described computer system protection circuit is by the rotation speed of the fan on described detecting chip detecting fan connector; with when rotation speed of the fan is less than described preset value; controlling described power supply unit does not provide voltage to described mainboard, and described mainboard shutdown, reaches the object of protection computer system with this.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the better embodiment of computer system protection circuit of the present invention.
Main element symbol description
| Computer system protection circuit | 1 |
| Power supply unit | 2 |
| Controller | 3 |
| Fan connector | 4 |
| Starting key | 5 |
| Platform controller | 6 |
| Detecting chip | U1 |
| With door | U2 |
| Impact damper | U3 |
| Resistance | R1-R8 |
| Electric capacity | C1-C4 |
| Diode | D1 |
| Voltage source | P12V、P3V3_AUX |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Please refer to Fig. 1, computer system protection circuit 1 of the present invention is arranged on a mainboard, and is connected with the power supply unit 2 of described computer system, and described power supply unit 2 is described main board power supply.The better embodiment of described computer system protection circuit 1 comprise a controller 3, connect fan fan connector 4, starting key 5, platform controller 6, detecting chip U1, one and door U2, an impact damper U3, resistance R1-R8, electric capacity C1-C4 and diode D1.Wherein, a preset value is stored in described detecting chip U1.
The pulse pin PWM of described fan connector 4 connects described controller 3, and its voltage pin VCC connects a voltage source P12V.Described electric capacity C1 is connected between the voltage pin VCC of described fan connector 4 and described voltage source P12V.The grounding pin GND ground connection of described fan connector 4.The speed pin TACH of described fan connector 4 connects the input pin of described detecting chip U1 successively through described resistance R1 and R2, the output pin of described detecting chip U1 connects first input end that is described and door U2, the described starting key 5 be connected with second input end of door U2 on described mainboard.Describedly be connected a voltage source P3V3_AUX with the voltage end of door U2 and through described electric capacity C3 ground connection, the described earth terminal ground connection with door U2.The described input end being connected described impact damper U3 with the output terminal of door U2, the voltage end of described impact damper U3 connects described voltage source P3V3_AUX and through described electric capacity C4 ground connection, its earth terminal ground connection.The output terminal of described impact damper U3 connects the input end of described platform controller 6 through described resistance R8, the output terminal of described platform controller 6 connects described power supply unit 2.The anode of described diode D1 connects the speed pin TACH of described fan connector 4, and its negative electrode connects a voltage source P12V.Described resistance R3 is connected between the speed pin TACH of described fan connector 4 and described voltage source P12V.The first end of described electric capacity C2 connects the node between described resistance R1 and R2, its second end ground connection.The first end of described resistance R4 connects the node between described resistance R1 and R2, the second end ground connection of described resistance R4.Between the second input end that described resistance R5 is connected to described and door U2 and its output terminal.Described resistance R6 is connected between described voltage source P3V3_AUX and the described and first input end of door U2.Between the input end that described resistance R7 is connected to described impact damper U3 and output terminal.Wherein, described impact damper U3 is used for filtering noise information signal, and in order to save cost, described impact damper U3 also can omit.
When described fan connector 4 connects a fan, after described mainboard electrifying startup, described detecting chip U1 detects the rotating speed of described fan by the speed pin TACH of described fan connector 4, and the rotation speed of the fan detected and described preset value are compared, when the rotation speed of the fan detected is more than or equal to described preset value, described detecting chip U1 exports a high level signal to the described first input end with door U2.Because now described mainboard starts, therefore the second input end that is described and door U2 receives a high level signal from described starting key 5.Describedly all receive high level signal with first and second input end of door U2, the described output terminal with door U2 exports a high level signal to described platform controller 6 by described impact damper U3, controls described power supply unit 2 and work on after described platform controller 6 receives described high level signal.
When the rotation speed of the fan that described detecting chip U1 detects is less than described preset value, described detecting chip U1 exports a low level signal to the described first input end with door U2.Because now described mainboard starts, therefore the second input end that is described and door U2 receives a high level signal from described starting key 5.Describedly receive a low level signal with the first input end of door U2; and its second input end receives a high level signal; the described output terminal with door U2 exports a low level signal to described platform controller 6 by described impact damper U3; control described power supply unit 2 after described platform controller 6 receives described low level signal to quit work; described power supply unit 2 does not provide voltage to described mainboard; described mainboard shutdown, thus make the object reaching protection computer system when rotation speed of the fan is less than described preset value.
Described computer system protection circuit 1 detects the rotation speed of the fan on fan connector 4 by described detecting chip U1; with when rotation speed of the fan is less than described preset value; controlling described power supply unit 2 does not provide voltage to described mainboard, and described mainboard shutdown, reaches the object of protection computer system with this.
Claims (5)
1. a computer system protection circuit, to be arranged on a mainboard and to be connected with a power supply unit, described power supply unit is described main board power supply, described computer system protection circuit comprises a controller, the fan connector of one connection fan, one starting key, one platform controller, one detecting chip and one and door, a preset value is stored in described detecting chip, the pulse pin of described fan connector connects described controller, the voltage pin of described fan connector connects one first voltage source, the grounding pin ground connection of described fan connector, the speed pin of described fan connector connects the input end of described detecting chip, the output terminal of described detecting chip connects first input end that is described and door, the described starting key be connected with the second input end of door on described mainboard, describedly be connected one second voltage source with the voltage end of door, the described earth terminal ground connection with door, the described input end being connected described platform controller with the output terminal of door, the output terminal of described platform controller connects described power supply unit, when after described mainboard electrifying startup, when the rotating speed of the fan that described detecting chip detects on described fan connector is more than or equal to described preset value, described detecting chip exports a high level signal to the described first input end with door, describedly receive a high level signal with the second input end of door from described starting key, the described high level signal that exports with the output terminal of door is to described platform controller, and controlling described power supply unit to make described platform controller provides voltage to described mainboard, when the rotation speed of the fan that described detecting chip detects is less than described preset value, described detecting chip exports a low level signal to the described first input end with door, describedly receive a high level signal with the second input end of door from described starting key, the described low level signal that exports with the output terminal of door is to described platform controller, and controlling described power supply unit to make described platform controller does not provide voltage to described mainboard.
2. computer system protection circuit as claimed in claim 1; it is characterized in that: described computer system protection circuit also comprises an impact damper; the input end of described impact damper connects output terminal that is described and door, and the output terminal of described impact damper connects the input end of described platform controller.
3. computer system protection circuit as claimed in claim 2, it is characterized in that: described computer system also comprises the first to the 8th resistance, first and second resistance described is connected in turn between the rotating speed pin of described fan connector and the input end of described detecting chip, described 3rd resistance is connected between the speed pin of described fan connector and described first voltage source, the first end of described 4th resistance connects the node between first and second resistance described, second end ground connection of described 4th resistance, between the second input end that described 5th resistance is connected to described and door and the described and output terminal of door, between the first input end that described 6th resistance is connected to described and door and described second voltage source, described 7th resistance is connected between the input end of described impact damper and the output terminal of described impact damper, described 8th resistance is connected between the output terminal of described impact damper and the input end of described platform controller.
4. computer system protection circuit as claimed in claim 3; it is characterized in that: described computer system protection circuit also comprises first to fourth electric capacity; described first electric capacity is connected between the voltage pin of described fan connector and described first voltage source; the first end of described second electric capacity connects the node between first and second resistance described; second end ground connection of described second electric capacity; between the voltage end that described 3rd electric capacity is connected to described and door and ground, between the voltage end that described 4th electric capacity is connected to described impact damper and ground.
5. computer system protection circuit as claimed in claim 1, it is characterized in that: described computer system also comprises a diode, the anode of described diode connects the speed pin of described fan connector, and the negative electrode of described diode connects described first voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715359.2A CN104731297A (en) | 2013-12-23 | 2013-12-23 | Computer system protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715359.2A CN104731297A (en) | 2013-12-23 | 2013-12-23 | Computer system protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104731297A true CN104731297A (en) | 2015-06-24 |
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ID=53455272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310715359.2A Pending CN104731297A (en) | 2013-12-23 | 2013-12-23 | Computer system protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104731297A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527641A (en) * | 2016-11-18 | 2017-03-22 | 郑州云海信息技术有限公司 | Server power control structure |
| CN110285086A (en) * | 2019-05-09 | 2019-09-27 | 苏州浪潮智能科技有限公司 | A kind of fan control system, method and server |
-
2013
- 2013-12-23 CN CN201310715359.2A patent/CN104731297A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527641A (en) * | 2016-11-18 | 2017-03-22 | 郑州云海信息技术有限公司 | Server power control structure |
| CN110285086A (en) * | 2019-05-09 | 2019-09-27 | 苏州浪潮智能科技有限公司 | A kind of fan control system, method and server |
| US11719251B2 (en) | 2019-05-09 | 2023-08-08 | Inspur Suzhou Intelligent Technology Co., Ltd | Fan control system, method and server wherein PWM pin and TACH pin are utilized to control a fan based on a mode control instruction |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150624 |