用UCC28950做移相，电路图如下，OUTA-OUTD端都有正常12V方波输出，OUTE和OUTF端检测不到任何输出信号。另外ADELEF，ADEL端的电压也都为0。请问各位高手可能的原因和如何解决，难道是元件坏了？
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