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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 266

High power PoE PD interface with integrated flyback controller

Dilian Reyes

Abstract

A high power Power over Ethernet (PoE) Powered Device (PD) interface with integrated flyback controller is described.

Keywords

Power over Ethernet

PD interface

LTC4268-1

Introduction

To this day, Power over Ethernet (PoE) continues to gain popularity in today’s networking world. The 12.95W delivered to the Powered Device (PD) input supplied by the Power Sourcing Equipment (PSE) is a universal supply. Each PD provides its own DC/DC conversion from a nominal 48V supply, thus eliminating the need for a correct voltage wall adapter. However, higher power devices cannot take advantage of standard PoE because of its power limitations, and must ...

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