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tps65910输出不正常问题



tps65910A上电(5V)之后,各路输出均不正常,VRTC输出2.5V,VDIG1输出5V,VDIG2上电之前对地电阻100k,上电之后对地电阻只有100欧,我看原理图也没什么问题呀?急求大神帮忙。