AN2783 Datasheet, PDF (32/47 Pages) STMicroelectronics – PM8800 demonstration kit for standard and high power PoE

Test results
Figure 19. V_DS and V_GS of the primary
MOSFET for 5 V 1 A
AN2783
Figure 20. V_DS and V_GS of the primary
MOSFET for 5 V 4 A
Ch2 = primary side power MOSFET gate voltage, Ch3 = primary side power MOSFET drain
voltage.
Figure 21. Details of the synchronous rectifier MOSFET voltage with 48 V and 4 A
out
Ch1 = secondary side power MOSFET drain-source voltage, Ch3 = primary side power
MOSFET drain voltage
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