The invention provides a wake-up signal generating circuit and a vehicle charging system.The signal triggering circuit comprises a first triggering module and a second triggering module, and when the first triggering module receives a falling edge signal, the time interval between the falling edge signal and a previous rising edge signal is larger than a first preset duration, the first triggering module outputs the pulse signal of the first level, and under other conditions, the second level is output; and when the second trigger module receives a rising edge signal, the time interval between the rising edge signal and the last falling edge signal is greater than a second preset duration, the second triggering module outputs the pulse signal of the first level, and in other cases, the second triggering module outputs the second level. Through the configuration, the wake-up signal is output at a proper time, the actual working requirement of the controller is met, and the problems that a charging wake-up circuit in the prior art cannot completely realize a better expected output signal scheme and cannot wake up the controller or enable the controller not to enter a sleep state under a specific working condition are solved.
本发明提供了一种唤醒信号发生电路以及车辆充电系统,其中,所述信号触发电路包括第一触发模块和第二触发模块,所述第一触发模块接收到离上一个上升沿信号的时间间隔大于第一预设时长的下降沿信号时,输出第一电平的脉冲信号,在其他情况下,均输出第二电平;所述第二触发模块接收到离上一个下降沿信号的时间间隔大于第二预设时长的上升沿信号时,输出所述第一电平的脉冲信号,在其他情况下,均输出所述第二电平。如此配置,在合适的时机输出唤醒信号,符合控制器实际的工作需要,解决了现有技术中的充电唤醒电路存在无法完全实现较优的预期输出信号方案,并且在特定工况下无法唤醒控制器或者让控制器无法进入休眠的问题。
Wake-up signal generating circuit and vehicle charging system
一种唤醒信号发生电路以及车辆充电系统
2021-07-13
Patent
Electronic Resource
Chinese
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