Im designing a PD device and have used the TPS2375 along with a 60-5v simple switcher, battery charger and 3v3 LDO. I have two questions
1) On the TPS2375, all documentation shows that the incoming negative rail after the bridge rectifiers connects to VSS on the TPS2375 ONLY and no connection to system ground.. Does all return current flow through the TPS2375 device?
2) I have a design requirement for 3v3 at 1Amp max, under normal load 500-600mah. does this setup look feasible?
Just to clarify, the PoE transformer and terminations is not shown in the example.
Working from Left to right to produce a battery backed-up 3v3 1 Amp rail.