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TPS54260: 无输出电压

Part Number: TPS54260

参考电路设计

引脚波形

BOOT:

PH:

EN:

电源输入为POE电源,识别电路,分类电路。最后输出48V到芯片,结果芯片无输出导致POE电源输入认为空载频繁重启。