Add Coordinated Overcurrent, Overvoltage Protection To PoE Equipment

Focus:

Single-use fuses and resettable PPTCs can protect PoE equipment from overcurrent conditions. Meanwhile, clamping devices (such as MOVs and TVS diodes) and foldback or crowbar devices (such as gas discharge tubes and thyristor surge suppressors) can protect against overvoltage conditions. Each options has advantages and disadvantages.

What you’ll learn:

• How to protect power sourcing equipment (PSE) and powered devices (PDs) against overvoltage and overcurrent conditions (overview)

Notes:

ED's Ideas For Design

View the Source

Author & Publication:

Matt Williams, global applications engineering manager, Tyco Electronics' Raychem circuit protection products, Electronic Design, Oct 02 2008

This article summary appears
in the HOW2POWER Design Guide.

The Design Guide offers
organized access to
hundreds of articles
on dozens of power conversion
and power management topics.

The Design Guide search results
include exclusive summaries
and accurate "how to" analysis
to help you make faster,
more informed decisions.

Search
for more articles