Simple battery circuit extends Power over Ethernet (PoE) peak current
Mark Gurries
Abstract
A simple battery circuit that extends Power over Ethernet (POE) peak current is described.
Keywords
Power over Ethernet
LTC4267
LTC4055
Introduction
Power over Ethernet (PoE) is a new development that allows for the delivery of power to Ethernet-based devices via standard Ethernet CAT5 cable, precluding the need for wall adapters or other external power sources. The PoE specification defines a hardware detection protocol where Power Sourcing Equipment (PSE) is able to identify PoE Powered Devices (PDs), thus allowing full backwards compatibility with non-PoE-aware (legacy) Ethernet devices. The PoE specification also sets an upper ...
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