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Hi
你的VDD给多少电压,CPUMP电压是多少(正常的是2倍的VDD电压左右)? 这个chargepump电压输出是用来驱动MOS Q1的必须稳定输出。
先确认chargepump是否稳定工作,如果稳定,在测试Isns是否促发保护。 (外围电路pin脚设置你可以看看datasheet这么设置的)