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基本按照5v evm做的板子，直流供电正常，但是和pse握手失败，pse和5v evm板握手成功。
问题找到了变压器的电容他们焊接错了，弄大了，把c260换个标准电路的电容就ok了
我的原理图，基本都是抄evm板，能帮忙看看那里出问题的可能性比较大，
