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Overheat protection circuit and system circuit board

A technology for overheating protection circuit and system circuit board, which is applied to emergency protection circuit devices, circuit devices, emergency protection devices for automatic disconnection, etc., can solve problems such as inability to turn off the power supply, and avoid overheating of the central processing unit. Use value, the effect of simple circuit structure

Inactive Publication Date: 2007-10-03
HUANDA COMPUTER (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it takes 4 seconds to use the forced shutdown method in the prior art, and it is even more impossible to meet the requirement of turning off the power supply within 0.5 seconds.

Method used

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  • Overheat protection circuit and system circuit board
  • Overheat protection circuit and system circuit board
  • Overheat protection circuit and system circuit board

Examples

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Embodiment Construction

[0033] Please refer to FIG. 5 , which is a circuit block diagram of a system circuit board according to a preferred embodiment of the present invention. In FIG. 5 , the system circuit board 500 includes a CPU 502 , an overheat protection circuit 504 , a power supply 506 , an input / output controller 516 , and a voltage detection circuit 518 . Wherein, the system circuit board 500 may be, for example, a system motherboard, and the I / O controller 516 may be, for example, a super I / O controller, but both are not limited thereto.

[0034] In this embodiment, the CPU 502 outputs an overheating signal when it detects that the temperature exceeds a default value. The I / O controller 516 is electrically coupled to the CPU 502 and outputs a control signal according to the overheating signal. Wherein, as those skilled in the art can easily know, the I / O controller 516 may be a super I / O controller, but not limited thereto. The super input and output controller is a floppy disk controlle...

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Abstract

An overheat protection-circuit consists of the first logic circuit for receiving voltage detection signal and overheat signal and for outputting one first logic signal after calculation, memory circuit for receiving said first logic signal and control signal and for outputting latch signal after calculation, the second logic circuit for receiving said latch signal and control signal and for outputting a power supply control signal after calculation, and power supplier for deciding not to output an operation voltage according to said power supply control signal.

Description

technical field [0001] The present invention relates to an overheating protection circuit, in particular to an overheating protection circuit and a system circuit board used on a computer main board to avoid overheating of a central processing unit and to turn off the power supply within a specified time. Background technique [0002] Computers have become an indispensable tool in human daily life. Almost all professional jobs rely on computers to make work easier and more efficient. With the increasing popularity of computers, the processing clock speed of the central processing unit (clock speed) has grown from a unit of measurement of one million times per second to a unit of measurement of one billion times per second in just a few years, not only the components of computer hardware And circuits have become more complex than before, and even the program code of computer software has grown from a few million lines of instructions to billions of lines. [0003] In today'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/04H02H7/20
Inventor JUNXU CHEN
Owner HUANDA COMPUTER (SHANGHAI) CO LTD
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