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Main board protection circuit

A technology for protection circuits and overvoltage protection circuits, which is applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., and can solve the problem of burning out mainboard power supply circuit components and mainboard chips Voltage shock, chip damage and other problems, to achieve the effect of low cost, avoid voltage surge, simple circuit

Inactive Publication Date: 2014-09-10
SHENZHEN PRAFLY TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the main board is connected to an external power supply through an adapter that does not correspond to the model, it may cause the output voltage of the adapter to the main board to be higher than the rated voltage of the main board, and it is likely to burn out the power supply circuit and other components of the main board.
[0003] In addition, even if the models of the adapter and the motherboard are compatible with each other, and its output voltage can match the voltage required by the computer motherboard, a large voltage surge may be generated at the moment when the adapter connected to the external power supply is connected to the motherboard, causing the motherboard to be damaged. The chip is subjected to an instantaneous huge voltage shock, which may cause damage to the chip

Method used

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Embodiment Construction

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] Such as figure 1 Shown is a structural block diagram of the motherboard protection circuit in the first preferred embodiment of the present invention, the motherboard protection circuit includes:

[0041] An overvoltage protection circuit 100, connected to the adapter, is used to prevent the adapter from providing a voltage higher than the rated voltage to the motherboard;

[0042] The slow start protection circuit 200 is connected with the overvoltage protection circuit 100, and is used to prevent the input voltage surge of the adapter;

[0043] The switch control circuit 300 is connected with the slow start protection circuit 200 and is used for providing the voltage passing through the overvoltage protection ...

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Abstract

The invention discloses a main board protection circuit. The main board protection circuit comprises an overvoltage protection circuit, a slow-start protection circuit and a switch control circuit. By implementing the main board protection circuit disclosed by the invention, the following beneficial effects are achieved: overvoltage protection for the main board of a computer can be realized, and the damages of wrong plugging of an adapter to the main board are prevented; the damages of an instantaneous voltage surge of plugging the power supply adapter to the main board are avoided by virtue of the slow-start protection circuit and the switch control circuit; the circuit is simple and the cost is low.

Description

technical field [0001] The invention relates to the field of computer electronic circuits, and more specifically relates to a protection circuit for a main board. Background technique [0002] Nowadays, there are many ways to supply power to computer motherboards, but most motherboards can be powered by an external power adapter. When using an external power adapter to supply power to the motherboard, it is necessary to choose an adapter that is compatible with the model of the motherboard. If the motherboard is connected to an external power supply through an adapter that does not correspond to the model, it may cause the output voltage of the adapter to the motherboard to be higher than the rated voltage of the motherboard, and it is likely to burn out the power supply circuit and other components of the motherboard. [0003] In addition, even if the models of the adapter and the motherboard are compatible with each other, and its output voltage can match the voltage requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/26G06F11/00H02H9/04
Inventor 阮仕涛
Owner SHENZHEN PRAFLY TECH
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