Power Interface – Class 4, efficiency-optimized, flyback converter for PoE applications

This reference evaluation module, featuring the TPS23454 PoE interface and DC-to-DC controller, is used for Class 4 PoE applications where high efficiency is required. Output power is 5V at 5A from either an adapter input (21.6-57VDC) or power over Ethernet. In general, the efficiency gain is on the order of 3-4%.

Features

– High efficiency(90%), converter only efficiency is 92%
– 5V at 5A output
– Isolated Flyback with synchronous rectifier
– Uses TPS23754 high-power, high-efficiency PoE interface PD and PWM controller
– Capable of accepting power from AUX sources such as adapters
– This circuit design is fully-functional tested and recommended for new designs

This reference design includes:

TLV431A: Low voltage adjustable precision shunt regulator

TPS23754: High power/high efficiency PoE interface and DC/DC Controller

Learn more by downloading the reference design below.