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TL494的最小死区时间到不了4%。

Other Parts Discussed in Thread: TL494

使用TL494实现了一款BUCK电路,DTC引脚和OUTPUT_CTRL引脚都连接到地(实测接地正确)。但是最小的死区时间不能达到资料里面说的4%。观察了FB引脚的波形,也只有很低的电压(空载)

现在不知道是什么原因,请各位大牛支招。