Computer hardware over-temperature protection circuit and computer mainboard

Abstract

The utility model provides a computer hardware over-temperature protection circuit and a computer mainboard. The computer hardware over-temperature protection circuit comprises a heating source, a level conversion module, a power switch module and a power connection module used for being connected with a computer power supply. The power supply connection module provides an input power supply for the mainboard through the power supply switch module. The heating source is provided with an over-temperature protection pin which outputs an over-temperature protection signal when the temperature of the heating source reaches a preset protection temperature. The level conversion module is connected between the over-temperature protection pin and the control end of the power switch module. An over-temperature protection signal output by the over-temperature protection pin is output to the control end of the power switch module after being subjected to level conversion through the level conversion module, so that the power switch module is turned off, and the input power supply is stopped from being provided for the mainboard. According to the utility model, the input power supply of the computer mainboard can be cut off in time when the computer hardware such as a processor is over-temperature, thereby achieving the effect of simultaneously closing the computer system power supply and the standby power supply.

Description

TECHNICAL FIELD

[0001] The utility model relates to computer technical field especially, relate to a computer hardware overtemperature protection circuit and computer mainboard. BACKGROUND

[0002] With the popularization of computer in people's work and life, the use scene of computer is more and more various, and it is often needed to be applied in various harsh environments, for example, high temperature and high humidity or high acidity environment such as seaside, therefore, the protection of computer is more and more various, and one of them is to monitor the temperature of hardware on the computer mainboard.

[0003] The working temperature of hardware on the computer mainboard directly affects the performance of computer. Taking the central processing unit as an example, the temperature of central processing unit (CPU) is affected by multiple factors during the running of computer, including the performance of central processing unit itself, the running intensity of central processing unit, the performance of computer radiator, environmental temperature and the like, these factors can cause the temperature of central processing unit to reach a very high degree, and the central processing unit runs for a long time under high temperature, which can greatly reduce its service life, and even can burn its internal module, cause the damage of the whole central processing unit, and also affect the running of other computer hardware devices. In the prior art, the external temperature information of central processing unit is sensed by setting a thermal sensor around the central processing unit, or the internal temperature information of central processing unit is obtained by directly reading the internal temperature of central processing unit, to monitor the temperature of central processing unit, and when the temperature of central processing unit is too high, the central processing unit and other hardware in computer can be protected by power-off shutdown.

[0004] However, most of the existing overtemperature shutdown protection is realized by integrated circuit (IC) or embedded controller (EC) group on the mainboard to execute normal power-off process, and the normal power-off process can only turn off system power supply, and cannot turn off standby power supply, and part of hardware in computer is still in working state, so it can be seen that the existing overtemperature shutdown protection mechanism is still not perfect. SUMMARY

[0005] The utility model discloses a kind of computer hardware overtemperature protection circuit and computer mainboard, can cut off the input power supply of computer mainboard in time when computer hardware such as processor overtemperature, reach the effect of closing computer system power supply and standby power supply simultaneously, to realize better hardware overtemperature protection function.

[0006] In order to achieve the above object, the utility model provides a computer hardware over temperature protection circuit for setting on the computer mainboard, including heat source, level conversion module, power switch module and power connection module for connecting computer power supply to receive and output direct current from the computer power supply, the power connection module is connected to the power switch module and provides input power to the mainboard through the power switch module, the power switch module includes input, output and control end, the input is connected to the power connection module for receiving the direct current, the output is used for providing the input power for the mainboard, the heat source has the over temperature protection pin of output over temperature protection signal when the temperature of heat source reaches preset protection temperature, the level conversion module is connected between the over temperature protection pin and the control end of the power switch module, wherein the over temperature protection signal of the over temperature protection pin is output to the control end after level conversion through the level conversion module, so that the power switch module is off, and the input power to the mainboard is stopped.

[0007] Preferably, the power switch module includes a first transistor and a second transistor, wherein the first pole of the first transistor is connected to the level conversion module as the control end of the power switch module, the second pole of the first transistor is connected to the first pole of the second transistor, the third pole of the first transistor is grounded, the second pole of the second transistor is connected to the power connection module as the input of the power switch module, and the third pole of the second transistor is the output of the power switch module.

[0008] Preferably, the first pole of the first transistor is connected to the level conversion module through a first resistor, wherein the first end of the first resistor is connected to the first pole of the first transistor and grounded through a first capacitor, the second end of the first resistor is connected to the level conversion module, and the second end of the first resistor is connected to the power connection module to receive the direct current through a second resistor and grounded through a third resistor, the second pole of the first transistor is connected to the first pole of the second transistor through a fourth resistor, and the first pole of the second transistor is also connected to the second pole of the second transistor through a parallel circuit of a second capacitor and a fifth resistor.

[0009] Preferably, the first transistor is an NPN type triode, the first pole of the first transistor is a base, the second pole of the first transistor is a collector, and the third pole of the first transistor is an emitter; the second transistor is a PMOS tube, the first pole of the second transistor is a gate, the second pole of the second transistor is a source, and the third pole of the second transistor is a drain.

[0010] Preferably, the level conversion module comprises a third transistor and a fourth transistor, wherein the first pole of the third transistor is connected to the over-temperature protection pin of the heat source; the second pole of the third transistor is connected to the first pole of the fourth transistor and is connected to a power supply on the mainboard through a sixth resistor; the third pole of the third transistor is grounded; the second pole of the fourth transistor is connected to the control end of the power switch module, and the third pole of the fourth transistor is grounded.

[0011] Preferably, the first pole of the third transistor is connected to the over-temperature protection pin of the heat source through a seventh resistor, is grounded through a third capacitor, and is grounded through an eighth resistor; the second pole of the third transistor is connected to the first pole of the fourth transistor through a ninth resistor, and the first pole of the fourth transistor is also grounded through a fourth capacitor.

[0012] Preferably, the third transistor is an NPN transistor, the first pole of the third transistor is a base, the second pole of the third transistor is a collector, and the third pole of the third transistor is an emitter; the fourth transistor is an NPN transistor, the first pole of the fourth transistor is a base, the second pole of the fourth transistor is a collector, and the third pole of the fourth transistor is an emitter.

[0013] Preferably, the heat source is a central processing unit, and the over-temperature protection signal is a low-level signal.

[0014] Preferably, the central processing unit is a megacore processor.

[0015] The utility model also provides a computer mainboard which comprises the computer hardware over-temperature protection circuit.

[0016] The computer hardware over-temperature protection circuit and the computer mainboard of the utility model are connected with the power switch module at the direct current output end of the power connection module for connecting the computer power supply to receive and output the direct current from the computer power supply, so that the power connection module provides input power to the computer mainboard through the power switch module, and the over-temperature protection pin of the heat source such as a central processing unit is connected to the control end of the power switch module through a level conversion module, the heat source outputs an over-temperature protection signal at the over-temperature protection pin when the temperature reaches a preset protection temperature to control the power switch module to be turned off, the input power of the computer mainboard can be cut off in time, that is, the power supply to the mainboard is cut off, so that not only the computer system power supply is turned off, but also the standby power supply is turned off, the effect of simultaneously turning off the computer system power supply and the standby power supply is achieved, and better hardware over-temperature protection is realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] For further understanding of the features and technical content of the present application, please refer to the following detailed description and drawings of the present application. However, the drawings are provided for reference and illustration only, and are not intended to limit the present application. In the drawings,

[0018] Figure 1 The circuit structure block diagram of the computer hardware over-temperature protection circuit of the present application.

[0019] Figure 2 The circuit wiring diagram of the power supply connection module and the power supply switch module of an embodiment of the present application.

[0020] Figure 3 The circuit wiring diagram of the level conversion module of an embodiment of the present application. DETAILED DESCRIPTION

[0021] To further illustrate the technical means adopted by the present application and its effects, the following describes the preferred embodiments of the present application and its drawings in detail.

[0022] As Figure 1 shown, the present application provides a computer hardware over-temperature protection circuit, which is used for setting on a computer mainboard to perform computer hardware over-temperature protection, such as over-temperature protection for a central processing unit.

[0023] The computer hardware over-temperature protection circuit includes a heat source 10, a level conversion module 20, a power supply switch module 30, and a power supply connection module 40 for connecting a computer power supply to receive and output a direct current DC_IN+ from the computer power supply. The power supply connection module 40 is connected to the power supply switch module 30 and provides an input power VDC to the mainboard through the power supply switch module 30. The power supply switch module 30 includes an input end 31, an output end 32, and a control end 33. The input end 31 is connected to the power supply connection module 40 for receiving the direct current DC_IN+. The output end 32 is used to provide the input power VDC to the mainboard. The heat source 10 has an over-temperature protection pin 11 that outputs an over-temperature protection signal when the temperature of the heat source 10 reaches a preset protection temperature. The level conversion module 20 is connected between the over-temperature protection pin 11 of the heat source 10 and the control end 33 of the power supply switch module 30. The over-temperature protection signal output by the over-temperature protection pin 11 is output to the control end 33 after level conversion by the level conversion module 20, so that the power supply switch module 30 is turned off and stops providing the input power VDC to the mainboard.

[0024] Therefore, the computer hardware over-temperature protection circuit can cut off the input power supply of the computer mainboard in time when the temperature of the heat source 10 reaches the preset protection temperature, cut off the power supply to the mainboard, not only make the computer system power supply be closed, but also make the standby power supply be closed, achieve the effect of closing the computer system power supply and the standby power supply at the same time, and better hardware over-temperature protection effect is realized. The heat source 10 is computer hardware arranged on the mainboard, and in a preferred embodiment, is a central processing unit.

[0025] Specifically, as shown in the figure, Figure 2 The power supply connection module 40 can include a DC power connector PJ1 and an ATX power connector ATX1, wherein the DC power connector PJ1 can be used for connecting a battery, the ATX power connector ATX1 is used for connecting an ATX power supply, and the output end of the DC power connector PJ1 and the output end of the ATX power connector ATX1 are connected, and are used for outputting the DC DC_IN+ (19V / 12V, 8A). The output end of the DC power connector PJ1 and the output end of the ATX power connector ATX1 are also connected with a plurality of capacitors, resistors and transient voltage suppression diodes PD1 to stabilize the power supply, which is known to those skilled in the art, and will not be described here.

[0026] Further, referring to Figure 2 and Figure 3 The power supply switch module 30 includes a first transistor PQ1 and a second transistor PQ2. Wherein the first pole of the first transistor PQ1 is connected to the level conversion module 20 as the control end 33 of the power supply switch module 30; the second pole of the first transistor PQ1 is connected to the first pole of the second transistor PQ2; the third pole of the first transistor PQ1 is grounded. The second pole of the second transistor PQ2 is connected to the power supply connection module 40 as the input end 31 of the power supply switch module 30, specifically connected to the output end of the DC power connector PJ1 and the ATX power connector ATX1, for receiving the DC DC_IN+; the third pole of the second transistor PQ2 is the output end 32 of the power supply switch module 30, for providing the input power VDC for the mainboard.

[0027] A plurality of parallel capacitors can also be provided between the third pole of the second transistor PQ2 and the ground, for stabilizing the input power VDC.

[0028] Specifically, the first pole of the first transistor PQ1 can be connected to the level conversion module 20 via a first resistor R1, wherein a first end of the first resistor R1 is connected to the first pole of the first transistor PQ1 and grounded via a first capacitor C1, a second end of the first resistor R1 is connected to the level conversion module 20 and connected to the power connection module 40 to receive the direct current DC_IN+ via a second resistor R2 and grounded via a third resistor R3; the second pole of the first transistor PQ1 is connected to the first pole of the second transistor PQ2 via a fourth resistor R4, and the first pole of the second transistor PQ2 is also connected to the second pole of the second transistor PQ2 via a parallel circuit of a second capacitor C2 and a fifth resistor R5.

[0029] In a specific embodiment, the first transistor PQ1 can be an NPN type triode, the first pole of the first transistor PQ1 is a base, the second pole of the first transistor PQ1 is a collector, and the third pole of the first transistor PQ1 is an emitter; the second transistor PQ2 is a PMOS tube, the first pole of the second transistor PQ2 is a gate, the second pole of the second transistor PQ2 is a source, and the third pole of the second transistor PQ2 is a drain. In this way, in a normal working state, the base of the first transistor PQ1 maintains a high level state, the first transistor PQ1 is turned on, the second transistor PQ2 is turned on, and the power connection module 40 can provide an input power VDC to the mainboard via the power switch module 30, specifically the second transistor PQ2; once the base of the first transistor PQ1 receives a low level signal from the level conversion module 20, the first transistor PQ1 is turned off, and the second transistor PQ2 is also turned off, so that the direct current DC_IN+ output by the power connection module 40 can no longer be output through the second transistor PQ2, and therefore, the power switch module 30 is turned off, stopping the provision of the input power VDC to the mainboard. It is explained that the setting mode of the power switch module 30 in the utility model is not limited by this embodiment, and other transistors can also be combined according to actual needs to achieve the same control effect.

[0030] Further, as Figure 3As shown, the level conversion module 20 comprises a third transistor PQ3 and a fourth transistor PQ4. The first pole of the third transistor PQ3 is connected to the over-temperature protection pin 11 of the heat source 10; the second pole of the third transistor PQ3 is connected to the first pole of the fourth transistor PQ4 and is connected to a power supply VCCP on the mainboard through a sixth resistor R6; the third pole of the third transistor PQ3 is grounded; the second pole of the fourth transistor PQ4 is connected to the control end 33 of the power switch module 30, and the third pole of the fourth transistor PQ4 is grounded.

[0031] Specifically, the first pole of the third transistor PQ3 can be connected to the over-temperature protection pin 11 of the heat source 10 through a seventh resistor R7, and is grounded through a third capacitor C3 and an eighth resistor R8; the second pole of the third transistor PQ3 is connected to the first pole of the fourth transistor PQ4 through a ninth resistor R9, and is connected to the power supply VCCP on the mainboard through the sixth resistor R6; the third pole of the third transistor PQ3 is grounded. The first pole of the fourth transistor PQ4 is also grounded through a fourth capacitor C4; the second pole of the fourth transistor PQ4 is connected to the first pole of the first transistor PQ1 through the first resistor R1; and the third pole of the fourth transistor PQ4 is grounded.

[0032] In a specific embodiment, the third transistor PQ3 is an NPN type triode, the first pole of the third transistor PQ3 is a base, the second pole of the third transistor PQ3 is a collector, and the third pole of the third transistor PQ3 is an emitter; the fourth transistor PQ4 is also an NPN type triode, the first pole of the fourth transistor PQ4 is a base, the second pole of the fourth transistor PQ4 is a collector, and the third pole of the fourth transistor PQ4 is an emitter. In this way, through the arrangement of the third transistor PQ3 and the fourth transistor PQ4, the level conversion module 20 can perform level conversion on the signal received from the over-temperature protection pin 11 of the heat source 10 and output to the control end 33 of the power switch module 30, i.e., the first pole of the first transistor PQ1. When the over-temperature protection pin 11 maintains a high level, the third transistor PQ3 is turned on, the fourth transistor PQ4 is turned off, and the first pole of the first transistor PQ1 maintains a high level. Once the heat source 10 outputs a low-level over-temperature protection signal through its over-temperature protection pin 11 due to the temperature reaching the preset protection temperature, the third transistor PQ3 is turned off, the fourth transistor PQ4 is turned on, the second pole of the fourth transistor PQ4 outputs a low-level signal (SHUTDOWN signal) to the first pole of the first transistor PQ1, so that the first transistor PQ1 is turned off, and the second transistor PQ2 is also turned off, i.e., the power switch module 30 is turned off, and the input power VDC is stopped from being provided to the mainboard. It is explained that the arrangement mode of the level conversion module 20 in the utility model is not limited to this embodiment, and other structures can also be used according to actual needs to achieve the same control effect.

[0033] In a preferred embodiment, the heat source 10 is a central processing unit, and the over-temperature protection signal is a low-level signal, i.e., when the temperature of the central processing unit reaches the preset protection temperature, a low-level over-temperature protection signal is output through the over-temperature protection pin 11. Preferably, the central processing unit is a megachip processor, and the over-temperature protection pin 11 is a PROCESS HOT pin. When the temperature of the megachip processor reaches the preset protection temperature, a low-level over-temperature protection signal is output.

[0034] Of course, it can be understood that the utility model can be adjusted accordingly according to the arrangement of the over-temperature protection signal, so as to timely close the power switch module 30 when the over-temperature protection pin 11 outputs the over-temperature protection signal, so that the power connection module 40 can no longer provide the input power VDC to the mainboard through the power switch module 30, thereby achieving the purpose of timely cutting off the input power of the computer mainboard.

[0035] Referring to Figure 2 and Figure 3The working process of the computer hardware over-temperature protection circuit is specifically explained.

[0036] In normal operation, the over-temperature protection pin 11 of the heat source 10 keeps a high level state, outputs a high level signal, the third transistor PQ3 of the level conversion module 20 is turned on, the fourth transistor PQ4 is turned off, the base of the first transistor PQ1 of the power switch module 30 keeps a high level, the first transistor PQ1 is turned on, the second transistor PQ2 is turned on, and the direct current DC_IN+ output by the power connection module 40 is provided to the mainboard through the second transistor PQ2 of the power switch module 30. When the temperature of the heat source 10 reaches the preset protection temperature, the heat source 10 outputs a low level over-temperature protection signal through the over-temperature protection pin 11, pulls down the voltage of the base of the third transistor PQ3 of the level conversion module 20, turns off the third transistor PQ3, turns on the fourth transistor PQ4, and outputs a low level SHUTDOWN signal to the base of the first transistor PQ1 of the power switch module 30 through the collector of the fourth transistor PQ4. The first transistor PQ1 is turned off, the second transistor PQ2 is turned off, and the direct current DC_IN+ output by the power connection module 40 can no longer be output through the second transistor PQ2. Therefore, the power switch module 30 is turned off, and the input power VDC to the mainboard is stopped.

[0037] The utility model also provides a computer mainboard, including above-mentioned computer hardware over-temperature protection circuit.

[0038] In summary, the computer hardware over-temperature protection circuit and the computer mainboard, the direct current output end of the power connection module for connecting the computer power supply to receive and output the direct current from the computer power supply is connected with the power switch module, so that the power connection module provides the input power to the computer mainboard through the power switch module, and the over-temperature protection pin of the heat source such as the central processing unit is connected to the control end of the power switch module through the level conversion module, and the over-temperature protection pin of the heat source outputs the over-temperature protection signal to control the power switch module to be turned off when the temperature reaches the preset protection temperature, so that the input power of the computer mainboard can be cut off in time, that is, the power supply to the mainboard is cut off, so that not only the computer system power supply is closed, but also the standby power supply is closed, the effect of closing the computer system power supply and the standby power supply at the same time is achieved, and better hardware over-temperature protection effect is realized.

[0039] The above, for the ordinary skill in the art, can make other various corresponding changes and deformation according to the technical scheme and technical conception of the utility model, and all these changes and deformation should belong to the protection scope of the utility model claim.

Claims

1. A computer hardware over-temperature protection circuit, for being disposed on a computer mainboard, characterized in that, The power supply module comprises a heating source, a level conversion module, a power switch module and a power connection module for connecting a computer power supply to receive and output direct current from the computer power supply, the power connection module being connected to the power switch module and providing input power to the mainboard through the power switch module; the power switch module comprises an input end, an output end and a control end, the input end being connected to the power connection module to receive the direct current, and the output end being used to provide the input power to the mainboard; the heating source has an over-temperature protection pin for outputting an over-temperature protection signal when the temperature of the heating source reaches a preset protection temperature; the level conversion module is connected between the over-temperature protection pin and the control end of the power switch module; wherein the over-temperature protection signal output by the over-temperature protection pin is output to the control end after level conversion by the level conversion module, so that the power switch module is turned off and stops providing the input power to the mainboard.

2. The computer hardware over-temperature protection circuit of claim 1, wherein, The power switch module comprises a first transistor and a second transistor, wherein a first pole of the first transistor is connected to the level conversion module as the control end of the power switch module; a second pole of the first transistor is connected to a first pole of the second transistor; a third pole of the first transistor is grounded; a second pole of the second transistor is connected to the power connection module as the input end of the power switch module; and a third pole of the second transistor is connected to the mainboard as the output end of the power switch module.

3. The computer hardware over-temperature protection circuit of claim 2, wherein, The first pole of the first transistor is connected to the level conversion module through a first resistor, wherein a first end of the first resistor is connected to the first pole of the first transistor and grounded through a first capacitor, a second end of the first resistor is connected to the level conversion module, and the second end of the first resistor is connected to the power connection module through a second resistor to receive the direct current and is grounded through a third resistor; the second pole of the first transistor is connected to the first pole of the second transistor through a fourth resistor, and the first pole of the second transistor is also connected to the second pole of the second transistor through a parallel circuit of a second capacitor and a fifth resistor.

4. The computer hardware over-temperature protection circuit of claim 2 or 3, wherein, The first transistor is an NPN triode, the first pole of the first transistor is a base, the second pole of the first transistor is a collector, and the third pole of the first transistor is an emitter; the second transistor is a PMOS transistor, the first pole of the second transistor is a gate, the second pole of the second transistor is a source, and the third pole of the second transistor is a drain.

5. The computer hardware over-temperature protection circuit of claim 1, wherein, The level conversion module comprises a third transistor and a fourth transistor, wherein a first pole of the third transistor is connected to the over-temperature protection pin of the heating source; a second pole of the third transistor is connected to a first pole of the fourth transistor and is connected to a power supply on the mainboard through a sixth resistor; a third pole of the third transistor is grounded; and a second pole of the fourth transistor is connected to the control end of the power switch module, and a third pole of the fourth transistor is grounded.

6. The computer hardware over-temperature protection circuit of claim 5, wherein, The first electrode of the third transistor is connected to the over-temperature protection pin of the heat source through a seventh resistor, connected to ground through a third capacitor, and connected to ground through an eighth resistor; the second electrode of the third transistor is connected to the first electrode of the fourth transistor through a ninth resistor, and the first electrode of the fourth transistor is also connected to ground through a fourth capacitor.

7. The computer hardware over-temperature protection circuit of claim 5 or 6, wherein, The third transistor is an NPN transistor, the first electrode of the third transistor is a base, the second electrode of the third transistor is a collector, and the third electrode of the third transistor is an emitter; the fourth transistor is an NPN transistor, the first electrode of the fourth transistor is a base, the second electrode of the fourth transistor is a collector, and the third electrode of the fourth transistor is an emitter.

8. The computer hardware over-temperature protection circuit of claim 1, wherein, The heat source is a central processing unit, and the over-temperature protection signal is a low-level signal.

9. The computer hardware over-temperature protection circuit of claim 8, wherein, The central processing unit is a megacore processor.

10. A computer motherboard, characterized by A computer hardware over-temperature protection circuit according to any one of claims 1-9.

Images