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关于LLC的软开关问题

大家好

如图所示。蓝色为驱动波形,绿色为管子的Vds电压,在开通时刻(标识1)驱动有震荡,在关断时刻(标识2)管子的Vds出现了震荡,震荡频率为70M左右,求分析原因,方便的话给出一些整改建议,十分感谢大家!