Anti-reverse input system for automobile controller power supply

Abstract

The invention discloses an anti-reverse input system for an automobile controller power supply. The system comprises a power supply, a voltage regulation module, a fault protection module, an anti-reverse input circuit and an automobile controller, wherein the power supply is electrically connected with the voltage regulation module, the voltage regulation module is in communication connection with the fault protection module, the fault protection module is in communication connection with the anti-reverse input circuit, the anti-reverse input circuit is in communication connection with the automobile controller, and the anti-reverse input circuit comprises a PMOS transistor, a diode, a resistor R1 and a resistor R2. According to the invention, the anti-reverse input circuit is arranged, the PMOS tube is used for replacing an anti-reverse diode, and when the controller is just powered on, the PMOS tube is not conducted, and the power supply supplies power to the controller through thefly-wheel diode of the PMOS tube at the moment, and when the power supply of the controller rises to a certain voltage, the PMOS tube is completely conducted, the controller bypasses the diode, and the power is completely supplied through the PMOS tube, so that the tube voltage drop of the diode is eliminated.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to an automobile controller power supply anti-reverse input system. Background technique [0002] At present, more and more vehicle-mounted devices are connected to the vehicle-mounted power supply system, and the connection circuit between the traditional vehicle controller and the power supply still has shortcomings: the previous controller power supply anti-reverse input circuit is generally in the input power supply It is realized by connecting diodes in series on the line, because the diodes have a tube voltage drop, so it will cause unnecessary heating, which will not only bring unnecessary energy waste, but also increase the failure rate of the controller. In addition, it is inconvenient to control the current during circuit operation. If real-time monitoring is carried out, the circuit cannot be cleared or disconnected in time, and the circuit protection effe...

AI Technical Summary

Problems solved by technology

[0002] At present, more and more vehicle-mounted devices are connected to the vehicle-mounted power supply system, and the connection circuit between the traditional vehicle controller and the power supply still has shortcomings: the previous controller power supply anti-reverse input circuit is generally in the input power supply It is realized by connecting diodes in series on the line, because the diodes have a tube voltage drop, so it will cause unnecessary heating, which will not only bring unnecessary energy waste, but also increase the failure rate of the controller. In addition, it is inconvenient to control the current during circuit operation. Real-time monitoring, the circuit cannot be dredged or disconnected in time, and the circuit protection effect is low

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