AN2783 Datasheet, PDF (30/47 Pages) STMicroelectronics – PM8800 demonstration kit for standard and high power PoE

Test results
Figure 13. 3.3 V out - standard board with diode rectification
90%
85%
80%
75%
70%
3.3Vout DC-DC
65%
3.3Vout overall
60%
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Iout [A]
AN2783
Figure 14. 3.3 V out - high-power board with synchronous rectification
90%
85%
80%
75%
70%
3.3Vout HP DC-DC
65%
3.3Vout HP overall
60%
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
Iout [A]
In the following pages are shown tests done on the 5 V high-power version and 3.3 V
standard version of the reference board.
Similar results and behaviors could be obtained with the 3.3 V high-power version and 5 V
standard versions.
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