原理图如上,遇到一些问题求帮助
一:nfault引脚输出电压4.7V、vref引脚电压7V多,这个是芯片挂掉了吗
二:nfault、veref电压正常,VM24V,EN给高电平,PH改变电平、H桥未做出相应变化
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