电源输入是双路24V_PB和24V_M,24V_PB作为24V_M的备份,带延时断开电路,13.8V输出并联一个充电输出电路,如图。电源输入有时会产生较大波动,尤其在车辆启动时,我们怀疑是不是因为使用了D1、D2、D5、D9而造成的40057及MOS管损坏?请教帮助分析一下,如何解决这批产品部分比例损坏问题
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