Typical Application Circuit for LT4276AIUFD 25.5W (Type 2) PoE+ Power Supply in Flyback Mode with 24V, 1A Output. The LT4276 is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ Powered Device (PD) controllers. It includes an isolated switching regulator controller capable of synchronous operation in both forward and flyback topologies with auxiliary power support