Power-over-Ethernet: IEEE 802.3af Draft

Posted by Hemos on Monday May 19, 2003 @01:00AM from the like-ma-no-extra-wires dept.

SkewlD00d writes "Want power (~10W) and your fat 10/100Mbps pipe (1Gbps maybe) on the SAME jack. Surf the web and recharge your handheld w/o finding its clunky base/transformer, home automation, and control systems are just some of the possibilities. Using suitable hubs/switches or dongle, power can be provided over unused pairs, or possibly raise the signal offset above DC, X10-style (no link, u know why). See IEEE 802.3af DTE Power via MDI Task Force. Maxim (not that one :o) already has some goodies. They have schematics for 8.25W/12.5W single-output and 14.2W triple-output 802.3af PSU. Try FindChips if you're looking for them; they're in production and are NOT vapor-ware!"

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Chips Available at Linear by Syris · 2003-05-19 02:34 · Score: 5, Informative

Linear Technology makes some Power-Over-Ethernet IC's. Like this one.
The Linear typical app seems to be much smaller, with fewer external components because it's actually optimized for the application.
The Maxim chips appear to be generic hot-swap IC's not optimized for power-over-ethernet. Using slashdot is an interesting way to publish an app-note and get some publicity.