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Overcurrent protection circuit and self-checking method thereof

An overcurrent protection circuit and protection circuit technology, applied in the direction of protection that reacts to overcurrent, can solve the problems of no self-check circuit, burnout, lack of hardware protection function, etc., to avoid the risk of burnout and ensure the effect of function

Inactive Publication Date: 2020-06-05
GUANGDONG WELLING AUTO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventional over-current hardware protection circuit does not have a self-test circuit. If the hardware protection circuit fails, there is a certain risk. For example, when hardware over-current occurs, especially in automotive circuits, the hardware protection function is missing and there is a risk of burning

Method used

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  • Overcurrent protection circuit and self-checking method thereof
  • Overcurrent protection circuit and self-checking method thereof
  • Overcurrent protection circuit and self-checking method thereof

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Embodiment Construction

[0048] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0049] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0050] like figure 1 As shown, the embodiment of the first aspect of the present invention provides an overcurrent protection circuit 1 including a protection circuit 10, a micro controller unit (MC...

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Abstract

The invention provides an over-current protection circuit and a self-checking method thereof, and the over-current protection circuit comprises a protection circuit, a micro-control unit and an injection signal circuit, wherein the protection circuit comprises a sampling circuit and a comparison circuit, and the sampling circuit is used for connecting a load and detecting a sampling current on theload; the comparison circuit is directly or indirectly connected with the output end of the sampling circuit; the comparison circuit generates an over-current signal when the load is over-current; aprotection pin of the micro-control unit is directly or indirectly connected with the output end of the comparison circuit so as to receive an overcurrent signal; and one end of the injection signal circuit is connected with the input / output interface of the micro-control unit, the other end is directly or indirectly connected with the output end of the sampling circuit, and the injection signal circuit is used for injecting an overcurrent test signal into the protection circuit. According to the overcurrent protection circuit provided by the invention, the micro-control unit is provided withthe input / output interface and is connected with the injection signal circuit, and whether the protection circuit is good or not is verified by detecting whether the output is normal or not so as to perform self-inspection on the protection circuit.

Description

technical field [0001] The present invention relates to the field of protection circuits, in particular to an overcurrent protection circuit, a self-test method for the overcurrent protection circuit, a micro control unit, a computer-readable storage medium and a vehicle. Background technique [0002] The conventional overcurrent hardware protection circuit does not have a self-test circuit. If the hardware protection circuit fails, there is a certain risk. For example, when the hardware overcurrent occurs, especially in the car circuit, the hardware protection function is missing, and there is a risk of burning. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. [0004] Therefore, the first aspect of the present invention is to provide an overcurrent protection circuit. [0005] The second aspect of the present invention is to propose a self-checking method for an overcu...

Claims

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Application Information

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IPC IPC(8): H02H3/08
CPCH02H3/08
Inventor 郑绪成
Owner GUANGDONG WELLING AUTO PARTS CO LTD
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