Full-bridge over-current protection circuit and full-bridge over-current protection method

An overcurrent protection circuit and bridge arm technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of large space chip area, large full bridge overcurrent protection circuit, large space, etc., to reduce the number of use and save Effects of PCB space

Active Publication Date: 2021-08-31
WUHAN JUXIN MICROELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, each comparator needs to occupy a large space, which leads to a large PCB (Printed Circuit Board, printed circuit board) space required for the full-bridge overcurrent protection circuit or a large integrated chip area

Method used

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  • Full-bridge over-current protection circuit and full-bridge over-current protection method
  • Full-bridge over-current protection circuit and full-bridge over-current protection method
  • Full-bridge over-current protection circuit and full-bridge over-current protection method

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Embodiment Construction

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0034] see Figure 2 to Figure 10 ,like figure 2 As shown, this embodiment provides a full bridge overcurrent protection circuit, which includes a first gating module 100, a first comparator 200, a second gating module 300, a second comparator 400 and a logic control module 500, The first gating module 100 is used to selectively detect the voltage corresponding to the current flowing through the two upper bridge arms; the first input end of the first comparator 200 is electric...

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Abstract

The invention discloses a full-bridge over-current protection circuit and a full-bridge over-current protection method. The full-bridge over-current protection circuit comprises a first gating module, a first comparator, a second gating module, a second comparator and a logic control module, wherein the first gating module multiplexes the first comparator, and can selectively judge whether over-current happens to two upper bridge arms or not; and the second gating module multiplexes the second comparator, and can selectively judge whether two lower bridge arms have overcurrent. Therefore, the use number of the comparators can be reduced to two, and the PCB space or the integrated chip area is greatly saved.

Description

technical field [0001] The present application relates to the technical field of overcurrent protection, in particular to a full bridge overcurrent protection circuit and a full bridge overcurrent protection method. Background technique [0002] Such as figure 1 As shown, when the full bridge or the H bridge is used for overcurrent protection, it is necessary to detect whether the current flowing through the four bridge arms is overcurrent. The overcurrent detection of each bridge arm requires a comparator, so four comparators are required , the output results of the four comparators output the corresponding overcurrent protection trigger signal after the logic operation of the logic circuit. [0003] However, each comparator needs to occupy a relatively large space, which leads to a relatively large PCB (Printed Circuit Board, printed circuit board) space required by the full-bridge overcurrent protection circuit or a relatively large integrated chip area. [0004] It sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/122
CPCH02H7/1227
Inventor 张淼卢杰柯毅刘德珩
Owner WUHAN JUXIN MICROELECTRONICS CO LTD
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