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PowerDsine Presentation October 2005 Page 15
www.PowerDsine.com
Conclusions
Increasing minimum PoEp voltage from 44V to 51V would
increase overall system efficiency
Costs of 51V PS and 48V PS are approximately the same and
from technical point of view would be beneficial to have minimum
51V in PoEp PSE
Regardless of output voltage consideration, adding boost circuit for
system with batteries back up, would increase battery useful life in
POE systems