PowerDsine IEEE802.3 manual PoEp Power Architecture-AC UPS

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PoEp Power Architecture-AC UPS

„Cost of power supply with 44V or 51V outputs is approximately the same. But under the same conditions, 51V output power supply will have higher efficiency then 44V PS

„Estimated cost of additional boost circuitry for supporting the change from 45V to 52V for 500W power supply is about 10% cost of power supply.

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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