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用两个UCC27210搭建全桥逆变出现问题!

Other Parts Discussed in Thread: UCC27210, LM393

我用两个UCC27210搭建了一个全桥逆变模块。结果当我给其两对互补的PWM波时,两路的HO都是低电平,两路的LO都是高电平。无法驱动NMOS。这是什么原因,输入波形良好,由信号发生器提供,经过LM393搭建的同相器和反相器输出,波形良好。HI,LI管脚波形良好。原理图详见附件。

全桥逆变.pdf