目前的状态是参考“”原理图设计,变压器没安装,因此VDD供电我直接用直流源给20V到芯片VDD脚,测量Vref=5V,但是Vrun=0V,即RUN脚无输出,PWM也没有输出。请教怎么解决?
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请问您怎么解决这个问题的呢,在调试过程中也遇到RUN引脚无输出的情况。