LTC4257CS8-1 Demo Board, Power-Over-Ethernet Interface Controller, Vsig = 48V, Vout = 3.3V

Demonstration circuit DC671A provides a complete IEEE802.3af interface and isolated 3.3V power supply solution for use in PD Phone applications. The LTC4257 performs signature, classification, and power interface functions to switch power to a 48V to3.3V isolated Flyback converter featuring the LT1737