Main components

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Part NumberDescription
TPS5632033A Synchronous Step-Down Voltage Regulator, Adjustable Output Voltage, 4.2-17V Input Voltage, 0.6-7V Output Voltage, Eco mode, SOT-563
7490220122
TPS23751PWP
TCMT1107
TLV431ACDBZR

PoE schematic

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PoE board layout