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ucc28950 同步整流



你好!我用二极管取代同步整流 输出300w没问题 但是一旦用同步整流 变压器就出现异响 并且 输出电压下降几乎为零 处于安全考虑 我立即掉电了。找不出原因,请指点一下问题的方向。