Electronic device and overheating protection circuit thereof

A technology for overheating protection circuits and electronic equipment, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection devices for automatic disconnection, etc., and can solve problems such as overheating damage of electronic equipment, temperature rise of electronic equipment, and small space

Inactive Publication Date: 2013-04-10
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the circuit module or chip works abnormally, it may not be able to dissipate heat in time due to the small space where it is located, which may easily cause the internal temperature of the electronic device to rise, causing irreversible overheating damage to the electronic device

Method used

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  • Electronic device and overheating protection circuit thereof
  • Electronic device and overheating protection circuit thereof
  • Electronic device and overheating protection circuit thereof

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Embodiment Construction

[0014] Please also refer to figure 1 , a preferred embodiment of the present invention provides an electronic device 100 , including an overheating protection circuit 10 , a central processing unit (central process unit, CPU) 20 and a fan 30 . The overheating protection circuit 10 is connected to the CPU 20 and the fan 30 to provide overheating protection for the electronic device 100 . Specifically, when the internal temperature of the electronic device 100 is higher than a preset upper limit temperature, for example, 60° C., the overheating protection circuit 10 drives the CPU 20 to perform frequency reduction operation, and at the same time drives the fan 30 to increase the rotation speed to increase the ventilation volume, thereby To achieve the purpose of overheating protection. And when the internal temperature of the electronic device 100 cools down to a lower limit temperature, such as 25° C., the overheat protection circuit 10 will respectively drive the CPU 20 and t...

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Abstract

The invention provides an overheating protection circuit and an electronic device provided with the same. The overheating protection circuit comprises a temperature sensing circuit, a comparison circuit and a switching circuit. The temperature sensing circuit is used for sensing the internal temperature of the electronic device and outputting a corresponding voltage signal. The comparison circuit is connected with the temperature sensing circuit and is used for comparing the voltage signal and a threshold value pre-stored in the comparison circuit and outputting a corresponding drive signal according to a comparison result. The switching circuit is connected to the comparison circuit and is used for correspondingly performing connection or disconnection under the control of the drive signal and further providing overheating protection for the electronic device.

Description

technical field [0001] The invention relates to an overheat protection circuit and electronic equipment with the overheat protection circuit. Background technique [0002] As the functions of electronic devices become increasingly rich, the number of required circuit modules or chips increases, and thus the consumed power also increases accordingly. At the same time, in order to adapt to the trend of miniaturization and portability of electronic equipment, it is necessary to place the circuit modules or chips in as small a space as possible. Therefore, when the circuit module or chip works abnormally, it may not be able to dissipate heat in time due to the small space where it is located, which may easily cause the internal temperature of the electronic device to rise and cause irreversible overheating damage to the electronic device. Contents of the invention [0003] In view of the above problems, it is necessary to provide an overheat protection circuit that can provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/04
CPCH02H5/042
Inventor 李计朝邓博
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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