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Using Standard Power over Ethernet controllers for high-powered devices

Posted: 15 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:TI application note? Power over Ethernet? PoE controllers?

IEEE 802.3af specifies that powered devices can draw no more than 15.4W from the port. Losses in the power switch and dc-to-dc converter mean that the actual load will not get more than 13W.

Integrated power controllers like the TPS2384 are factory set to meet this requirement.

Any IEEE 802.3af power sourcing equipment (PSE) power controller can be used for higher power by adding a simple circuit to the port to increase available current.

View the PDF document for more information.

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