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TPS22960: ON脚接地,VIN脚竟与VOUT脚导通

Part Number: TPS22960

原理图如上,也尝试过单片机GPIO IO给ON1脚无论输出高电平还是低电平,但VIN1与VOUT1之间还是导通;

没有上电的情况下,ON1脚接地,用万用表通断档测VIN与VOUT,还是发现导通。