Over-heat protection device of electronic device

A technology for overheating protection and electronic equipment, applied in the direction of protection against overvoltage, protection against undervoltage or no voltage, etc., can solve the problem of not being able to interrupt the power supply, etc., to prevent abnormal operation and prevent electronic equipment. The effect of circuit overheating and preventing erroneous operation

Inactive Publication Date: 2008-03-26
NANJING LG TONGCHUANG COLOR DISPLAYS SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0012] However, as mentioned above, the electronic equipment overheating protection device using the above-mentioned thermistor can sense the above-mentioned overheating state and work only after the overloaded element is in an overheating state, so it cannot fundamentally prevent the occurrence of electronic equipment overheating
[0013] In addition, the overheat protection device for electronic equipment using a thermistor can only work in an overheated state, so it cannot interrupt the power supply when the supplied voltage is lower than the voltage necessary for the current.

Method used

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  • Over-heat protection device of electronic device

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Embodiment Construction

[0039] Embodiments of the electronic equipment overheating protection device of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Fig. 2 shows an embodiment of the electronic equipment overheating protection device of the present invention.

[0041] As shown in FIG. 2 , the electronic device overheat protection device of the present invention is composed of an auxiliary voltage detection device 210 , an auxiliary voltage power distribution device 220 , a power control device 230 and an overheat protection device 240 .

[0042] According to the control of the relay 203, the electronic device overheat protection device of the present invention interrupts the power supply of the main power supply device 201 and the auxiliary power supply device 202 of the power supply device 200, thereby preventing the auxiliary power supply device 202 from providing abnormal voltage to the circuit part of the electronic device.

[0043]...

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Abstract

This invention relates to an over-heat protecting device of an electronic device including; a sub-voltage test device testing output voltages of multiple sub-supply devices in a power supply device, sub-voltage distribution equipment used in selectively outputting output voltages of the sub-voltage test device, a supply control device outputting signals for stopping power supply by the power supply device when the output voltage of th distribution equipment is abnormal and over-heat protection device stopping power supply of the supply device according to the control signal of the supply control device.

Description

technical field [0001] The invention relates to an electronic equipment overheat protection device capable of interrupting the power supply of the power supply device by detecting the output voltage when the output voltage of the power supply device changes. Background technique [0002] During the operation of the circuit connected to the power supply of electronic equipment, if the load increases abnormally, the semiconductor power distribution device such as the transistor as the circuit element will overheat, which will cause damage to the semiconductor, so that the semiconductor power distribution device cannot perform its function. as it should be. [0003] Therefore, in an overheat protection circuit for preventing overheating, it is necessary to use a temperature detecting device capable of detecting an overheating state. This temperature detecting device adopts thermal fuse, but because the thermal fuse can not recover its original state after it is interrupted and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/20H02H3/24
Inventor 李向东
Owner NANJING LG TONGCHUANG COLOR DISPLAYS SYST CO LTD
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