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DCDC电源250W，输出为5VDC-50A，公司工程师在调试，输入电压为36VDC，发现占空比一直为70%，也带不上载，VDS的最小值电压没有到零。请大家帮忙分析一下，谢谢。
VDS电压最小值为多少？提供VDS波形及驱动波形来看看。
