PowerDsine IEEE802.3 manual PoEp with Add Power

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PoEp with Add Power

AC or Battery

Add Power

Circuit

POE PS

+

-

+

V<51V

-

+

Vout 51V

-

•For 48V 250W power supply, maximum power for add power converter would be (52V-48V)*(500/48)=42W or about 9% of 500W PS cost

•However taken in account improved system efficiency, total cost of ownership would remain about the same

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PowerDsine Presentation

October 2005

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Contents Vancouver BC, November Part a Objectives HP POE voltage range PoEp minimum voltage 44V 51V Pd power PoEp minimum voltage PoEp Power Architecture-AC Input PoEp Power Architecture-AC Input HP POE Power Architecture-AC Input PoEp Power Architecture-AC UPS PoEp Power Architecture-AC UPS PoEp with Boost circuit PoEp with Add Power Conclusions Part B 802.3af modular installed base considerations „ 802.3af minimum PSE voltage „ Modular switchesHow to solve the conflict „ The Conflict isHow to solve the conflict PD side „ Proposed SolutionHow to solve the conflict PSE side „ Effects on PSE specifications PoEp PSE minimum voltage isSummary Discussion References Annex a Enhanced Classification table