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
www.PowerDsine.com | PowerDsine Presentation | October 2005 | Page 10 |