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按照数据手册的降压转换器实例，电路不会输出5伏，POE的输入电压一直从0伏跳动到50伏
Hi，
你对照我们EVM的原理图仔细检查一下你的电路是否有错误的地方，元器件选择有没有问题，有无虚焊等等。
http://www.ti.com/lit/ug/slvu136a/slvu136a.pdf
