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LM5118: 的HO和LO没有对MOS管的驱动信号输出。

Part Number: LM5118

LM5118芯片设计为输入20-60V,输出24V。实际上电后有个别板卡输出1.5V。使能已经上拉。HO和LO好坏板卡对比。好的板卡是输出脉冲信号,坏的板卡输出一个固定电平。这是因为什么引起的呢。