The invention discloses an automobile driving relay holding circuit, a control method and an automobile control circuit, when an automobile is abnormal, a power management chip outputs a safety state holding signal to conduct a first switch unit, so as to start to charge a charging and discharging circuit; therefore, a high-level control signal can be output according to the comparison result of the real-time charging voltage of the charging and discharging circuit and the reference comparison voltage provided by the reference voltage circuit to control the automobile driving relay driving circuit to work, and then the automobile driving relay is kept. The time when the charging and discharging circuit is charged to exceed the reference comparison voltage can become the time for controlling the operation of the automobile driving relay driving circuit, so that after the main controller is normal, the output of a high-level control signal can be stopped in time to reset the control capability of the main controller. According to the invention, a high-cost power management chip is not needed, the safety of the driving relay is maintained, and the production cost is greatly reduced.
本发明公开了一种汽车行车继电器保持电路、控制方法及汽车控制电路,在汽车出现异常时,通过电源管理芯片输出安全状态保持信号将第一开关单元导通,从而开始向充放电电路充电,从而可以利用充放电电路的实时充电电压和基准电压电路提供的基准比较电压的比较结果输出高电平控制信号控制汽车行车继电器驱动电路工作,进而实现汽车行车继电器的保持,其中,充放电电路充电到超过基准比较电压的时间便可以成为控制汽车行车继电器驱动电路工作的时间,从而可以在主控制器正常后,及时停止输出高电平控制信号复位主控制器的控制能力。本发明无需使用高成本的电源管理芯片,实现对行车继电器的安全保持,极大的降低了生产成本。
Automobile driving relay holding circuit, control method and automobile control circuit
汽车行车继电器保持电路、控制方法及汽车控制电路
2024-01-05
Patent
Electronic Resource
Chinese
Automobile electronic pump driving control circuit and automobile electronic module
European Patent Office | 2022
|Automobile lamp driving control circuit PCBA, system, device and automobile
European Patent Office | 2024
|