Rapid power supply and abnormity handling circuit for vehicle-mounted ECU

An exception handling and circuit technology, applied in the direction of circuits or fluid pipelines, vehicle components, protection against overcurrent, etc., can solve problems such as poor reliability

Active Publication Date: 2021-09-03
SHENZHEN LONGHORN AUTOMOTIVE ELECTRONICS EQUIPCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a vehicle-mounted ECU fast power supply and abnormal processing circuit, aiming to solve the problem of poor reliability caused by the over-current protection of the fuse in the existing vehicle-mounted ECU power supply circuit

Method used

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  • Rapid power supply and abnormity handling circuit for vehicle-mounted ECU
  • Rapid power supply and abnormity handling circuit for vehicle-mounted ECU

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. 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.

[0028] It should also be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

[0029] It should also be further understood that the term "a...

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Abstract

The invention discloses a rapid power supply and abnormity handling circuit for a vehicle-mounted ECU, which is provided with a main control module, an on-off control module, an overcurrent detection module, a voltage division module and an output maintenance module, when the overcurrent detection module detects that the current is too large, the on-off control module disconnects the connection of an output end based on the changed voltage. Therefore, the circuit can realize the overcurrent protection function based on the voltage change of the on-off control module, the temperature fusing protection on which the fuse depends is reduced, the problem that the PMOS tube is burnt out or the diode is burnt out due to slow heating and untimely turn-off of the fuse in a low-temperature environment is avoided, the influence of the environment temperature on the circuit is reduced, and the stability and the reliability of circuit overcurrent protection are improved.

Description

technical field [0001] The invention relates to the field of vehicle-mounted ECU power supply circuits, in particular to a vehicle-mounted ECU fast power supply and abnormal processing circuit. Background technique [0002] A large number of cameras are connected to vehicle ECUs such as panoramic controller (AVM), automatic parking system (APS), automatic driving system (ADAS), streaming media rearview mirror, etc. According to system design requirements: 1. When the ECU is started, it can quickly power on the camera to output images; 2. When the power supply of a certain camera in the circuit is overcurrent (including overcurrent exceeding the designed maximum power supply current or short-circuiting to ground ), the ECU needs to quickly diagnose the overcurrent of the power supply of the camera and quickly shut down the power supply of the camera. If the overcurrent is eliminated, it will be powered on again to start the recovery function. If the overcurrent exceeds the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/023B60R16/03B60R16/033H02H3/08
CPCB60R16/0231B60R16/03B60R16/033H02H3/08
Inventor 罗小平王家才鄢曹臣李来珊
Owner SHENZHEN LONGHORN AUTOMOTIVE ELECTRONICS EQUIPCO
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