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TI工程师帮忙解答一下,UCC28950驱动问题,谢谢!

Other Parts Discussed in Thread: UCC28950

你好

      最近使用UCC28950开发12V200A的电源,目前已经正常工作,但是对MOS的DS波形还是有疑问,电路基本与UCC28950的600W参考设计电路一致,只是加强了前后级MOS的驱动,具体波形如下,请问为何GS有明显的死区时间,而DS有明显的交叉(不知是否为直通,会不会导致炸管),从GS/DS波形上看,MOS在GS波形还未上升时就提前开启了,这是否是软开关引起的?谢谢!