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上电后，EN使能，PWM输入，C1N、C1P管脚电压跳动，GD管脚电压跳动，电压无升压，是什么原因？器件的参数都是参考开发板的，焊接也没有问题。
您好，手册上说IFSEL接VDDIO时，PWM输入调光，我现在就是接VDDIO,但是感觉PWM输入没有作用
