A kind of power delay circuit of automobile controller

Abstract

The invention relates to a power delay circuit of an automobile controller. The power delay circuit of the automobile controller comprises a power protection module, a power switch module, a software delay module and a hardware delay module. The power switch module is respectively connected with the power protection module, the software delay module and the hardware delay module, the power protection module is connected with an external power source, and the software delay module is connected with an MCU; the software delay module and the hardware delay module control breakover of the power switch module to control the MCU to work. Compared with the prior art, the power delay circuit of the automobile controller has the advantages of being low in cost, flexible to control, safe and reliable, and the like.

Description

technical field [0001] The invention relates to a power delay circuit, in particular to a power delay circuit of an automobile controller. Background technique [0002] With the development of automotive electronic technology, more and more electronic control units appear in the car, such as engine controller, transmission controller, vehicle controller and so on. The power supply of these controllers is often controlled by the car key, but in many cases, when the car key switch is turned off or fails, the controller power supply circuit still needs to continue to work to store data or ensure that certain components are safe. state. Therefore, in order to satisfy this function of the controller, it is necessary to design a power delay circuit. [0003] At present, the power delay circuit is generally delayed by hardware. The length of the delay time of this method is determined by the hardware parameters. Once the design is completed, the delay time cannot be adjusted. How...

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Problems solved by technology

[0003] At present, the power delay circuit is generally delayed by hardware. The length of the delay time of this method is determined by the hardware parameters. Once the design is completed, the delay time cannot be adjusted. However, the operating conditions of the car are complex and the delay time is required. The length needs to be adjusted according to the actual situation. At this time, the hardware delay is difficult to meet the demand

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