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TPS65121 EN/SS引脚电压异常

Other Parts Discussed in Thread: TPS56121, TPS65121

TPS56121工作时EN/SS引脚上电会达到5.6V,另外掉电的时候EN/SS引脚也会反复启动,示波器测量出EN/SS引脚的波形图如下

关于TPS65121部分电路设计如下: