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PowerDsine IEEE802.3 manual Discussion, PowerDsine Presentation, October, Page

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Discussion

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PowerDsine Presentation

October 2005

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PowerDsine IEEE802.3 manual Discussion, PowerDsine Presentation, October, Page

Contents

IEEE802.3at Task Force Vancouver BC, NovemberArkadiy Peker Daniel Feldman Yair Darshan Part A Technical Considerations regarding PoEp output voltage range„ To discuss optimum voltage range for PoEp ObjectivesPowerDsine Presentation „ To show advantages of having PoEp minimum voltage ofHP POE voltage range Maximum power PoEp minimum voltagePower dissipation 3.06WPSE power Pd powerPower dissipation PoEp minimum voltagePowerDsine Presentation „ Let consider different options in PoEp Power architecturesAC input and battery back up AC UPS input PoEp minimum voltageOctober PoEp Power Architecture-AC InputPowerDsine Presentation PagePoEp Power Architecture-AC Input „ One of the arguments for not using 51V power supply is that back up battery operates up to ~ 43HP POE Power Architecture-AC Input October PoEp Power Architecture-AC UPSPowerDsine Presentation PagePoEp 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 PSPowerDsine Presentation PoEp with Boost circuitPOE PS Battery Lb Db Qb RsAdd Power Circuit POE PS PoEp with Add PowerAC or Battery PowerDsine PresentationConclusions Part B Market considerations regarding 802.3at output voltage rangePowerDsine Presentation „ 802.3af minimum PSE voltage „ Modular switches802.3af modular installed base considerations OctoberPowerDsine Presentation How to solve the conflict„ The Conflict is OctoberHow to solve the conflict - PD side „ Proposed SolutionHow to solve the conflict - PSE side „ Effects on PSE specifications PoEp PSE minimum voltage isSummary October DiscussionPowerDsine Presentation PageOctober ReferencesPowerDsine Presentation PageGroup B Annex A Enhanced Classification tablePowerDsine Presentation „ Example for group A and group B „ With Pmax=40W