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Overcurrent protection circuit

An overcurrent protection circuit and current technology, which is applied in the direction of overcurrent protection, can solve the problems of design and packaging difficulties, power consumption and heat generation increase, and reduce packaging difficulty and cost, reduce power consumption and development heat effect

Active Publication Date: 2021-03-19
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] This application provides an overcurrent protection circuit to solve the problems of design and packaging difficulties and increased power consumption and heat generation caused by the use of external resistors in the prior art

Method used

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Embodiment Construction

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0011] For details, please refer to figure 1 , figure 1 It is a block diagram of the circuit principle structure of the overcurrent protection circuit 10 of the present application. The overcurrent protection circuit 10 is used for detecting the current flowing through the electronic circuit and generating a corresponding feedback signal, so as to perform overcurrent protection for the electronic device. Wherein, the electronic device may be a semiconductor ...

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Abstract

The invention discloses an overcurrent protection circuit. The overcurrent protection circuit comprises a current detection circuit and a feedback circuit. The current detection circuit is configuredto detect a current of the electronic device and convert the detected current into a sampling voltage through a sampling resistor. The sampling voltage is output through a first node. The sampling resistor is a parasitic resistor generated by a wire connected with an electronic device or a wire in the electronic device. The feedback circuit is connected with the current detection circuit and is configured to generate a corresponding feedback signal according to the sampling voltage so as to carry out overcurrent protection.

Description

technical field [0001] The application relates to electronic circuit technology, in particular to an overcurrent protection circuit. Background technique [0002] In electronic devices such as semiconductor devices or chips, overcurrent conditions will cause a sharp increase in the heat generation of the electronic device, and even cause the electronic device to fail in severe cases. Generally, an external resistor is used to sample the current of the electronic device. However, on the one hand, the external resistor increases the difficulty and cost of packaging the electronic device, and on the other hand, the power consumption of the external resistor generated by the current flowing through the external resistor also increases the power consumption of the device. and heat generation, which further increases the difficulty of designing electronic devices. Contents of the invention [0003] The present application provides an overcurrent protection circuit to solve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08
CPCH02H3/08
Inventor 刘利书
Owner GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD
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