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PowerDsine IEEE802.3 PoEp minimum voltage, AC input and battery back up AC UPS input, October

Models: IEEE802.3

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Let consider different options in PoEp Power architectures :

PoEp minimum voltage

51V required smaller PSE power supply then at 44V, for the same load.

The technical advantage is clear for using higher voltage minimum voltage level for POEp PSE.

Let consider different options in PoEp Power architectures :

-AC input and battery back up

-AC UPS input

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PowerDsine Presentation

October 2005

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PowerDsine IEEE802.3 PoEp minimum voltage, „ Let consider different options in PoEp Power architectures, October, Page

Contents

IEEE802.3at Task Force Vancouver BC, NovemberArkadiy Peker Daniel Feldman Yair Darshan Technical Considerations regarding PoEp output voltage range Part A„ To show advantages of having PoEp minimum voltage of ObjectivesPowerDsine Presentation „ To discuss optimum voltage range for PoEpHP POE voltage range 3.06W PoEp minimum voltagePower dissipation Maximum powerPoEp minimum voltage Pd powerPower dissipation PSE powerPoEp minimum voltage „ Let consider different options in PoEp Power architecturesAC input and battery back up AC UPS input PowerDsine PresentationPage PoEp Power Architecture-AC InputPowerDsine Presentation October„ One of the arguments for not using 51V power supply is that back up battery operates up to ~ 43 PoEp Power Architecture-AC InputHP POE Power Architecture-AC Input Page PoEp Power Architecture-AC UPSPowerDsine Presentation October„ 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 PoEp Power Architecture-AC UPSLb Db Qb Rs PoEp with Boost circuitPOE PS Battery PowerDsine PresentationPowerDsine Presentation PoEp with Add PowerAC or Battery Add Power Circuit POE PSConclusions Market considerations regarding 802.3at output voltage range Part BOctober „ 802.3af minimum PSE voltage „ Modular switches802.3af modular installed base considerations PowerDsine PresentationOctober How to solve the conflict„ The Conflict is PowerDsine Presentation„ Proposed Solution How to solve the conflict - PD side„ Effects on PSE specifications PoEp PSE minimum voltage is How to solve the conflict - PSE sideSummary Page DiscussionPowerDsine Presentation OctoberPage ReferencesPowerDsine Presentation October„ Example for group A and group B „ With Pmax=40W Annex A Enhanced Classification tablePowerDsine Presentation Group B