High-side switching circuit with current protection function

An overcurrent protection circuit, high-side switch technology, applied in emergency protection circuit devices, protection against overcurrent, circuit devices, etc., can solve the problem of high cost and achieve the effect of low cost

Pending Publication Date: 2020-06-19
KEBODA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the smart high-side switches with current protection functions on the market currently use integrated solutions, which are costly

Method used

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  • High-side switching circuit with current protection function
  • High-side switching circuit with current protection function
  • High-side switching circuit with current protection function

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] figure 1 A schematic circuit diagram of the high-side switch circuit according to the first embodiment of the present invention is shown. see figure 1 . A high-side switch circuit with a current protection function according to the first embodiment of the present invention, comprising a voltage input terminal In, a voltage output terminal Output, a control signal input terminal s, a first switching element Q1, a current sampling circuit 1, and a start-up circuit 2. An overcurrent protection circuit 3 , a protection state latch circuit 4 , a first switching element control circuit 5 and a reset circuit 6 .

[0018] The first terminal and the second terminal of the first switching element Q1 are respectively connected to the voltage input terminal In and the voltage output terminal Output, and the current sampling circuit 1 is used to...

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PUM

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Abstract

The invention discloses a high-side switching circuit with a current protection function. The high-side switching circuit comprises a voltage input end, a voltage output end, a control signal input end, a first switching element, a current sampling circuit, a starting circuit, an overcurrent protection circuit, a protection state latch circuit and a first switching element control circuit. The first switching element is connected with a voltage input end and a voltage output end, and the current sampling circuit samples current flowing through the first switching element. An input end of the starting circuit is connected with an output end of the current sampling circuit, and the output end is connected with a control end of the overcurrent protection circuit. The protection state latch circuit is respectively connected with the voltage input end and the overcurrent protection circuit; a control input end of a first switching element control circuit is connected with a control signal input end of the high-side switching circuit and the output end of the overcurrent protection circuit, and the output end of the first switching element control circuit is connected with a control input end of a first switching element Q1. The high-side switching circuit is low in cost, can latch a protection state, and has an overcurrent protection function.

Description

technical field [0001] The invention relates to protection circuit technology, in particular to a high-side switch circuit. Background technique [0002] Common overcurrent protection methods mainly include the following two methods: The first method is to use a fuse, which will blow when an overcurrent occurs. In this way, the circuit cannot be restored by itself, and the fuse needs to be replaced; the second way is to use an intelligent high-side switch. With this protection method, the protection state can be restored by itself. [0003] Most of the smart high-side switches with current protection function on the market currently use integrated solutions, which are costly. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a low-cost high-side switch circuit capable of latching a protection state and having an over-current protection function. [0005] Another technical problem to be solved by the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08H02H3/06H02H3/05H02H1/00
CPCH02H3/08H02H3/066H02H3/05H02H1/0007
Inventor 阳彩阚予平
Owner KEBODA TECH CO LTD
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