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PowerDsine Presentation October 2005 Page 10
www.PowerDsine.com
HP POE Power Architecture-AC Input
Taken at account the voltage drop on a high current battery cable
and PSE voltage drop (Mosfet and CS resistor), it would require
Low Voltage Disconnect to shutdown battery at ~46V in order to
have 44V on the PSE output
It means battery life would not be fully utilize
Adding boost converter, which would keep output voltage of the
system constant, in our case 51V,would extend batteries
capabilities on ~15% in POE systems