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IEEE802.3 PoEp with Boost circuit, POE PS Battery, Lb Db Qb Rs, Cb R1 R2, October
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IEEE802.3
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Specs
Install
AC input and battery back up AC UPS input
How to
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Proposed Solution
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Image 13
PoEp with Boost circuit
AC
POE PS
Battery
PWM
Lb
Db
Qb
Rs
Cb
R1
R2
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October 2005
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Contents
IEEE802.3at Task Force
Vancouver BC, November
Arkadiy Peker Daniel Feldman Yair Darshan
Technical Considerations regarding PoEp output voltage range
Part A
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Objectives
To discuss optimum voltage range for PoEp
To show advantages of having PoEp minimum voltage of
HP POE voltage range
Power dissipation
PoEp minimum voltage
Maximum power
3.06W
Power dissipation
Pd power
PSE power
PoEp minimum voltage
AC input and battery back up AC UPS input
Let consider different options in PoEp Power architectures
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PoEp minimum voltage
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PoEp Power Architecture-AC Input
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One of the arguments for not using 51V power supply is that back up battery operates up to ~ 43
PoEp Power Architecture-AC Input
HP POE Power Architecture-AC Input
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PoEp Power Architecture-AC UPS
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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 UPS
POE PS Battery
PoEp with Boost circuit
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Lb Db Qb Rs
AC or Battery
PoEp with Add Power
Add Power Circuit POE PS
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Conclusions
Market considerations regarding 802.3at output voltage range
Part B
802.3af modular installed base considerations
802.3af minimum PSE voltage Modular switches
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October
The Conflict is
How to solve the conflict
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October
Proposed Solution
How to solve the conflict - PD side
Effects on PSE specifications PoEp PSE minimum voltage is
How to solve the conflict - PSE side
Summary
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Discussion
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References
October
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Annex A Enhanced Classification table
Group B
Example for group A and group B With Pmax=40W