Other Parts Discussed in Thread: BOOST-PSEMTHR-007, TPS23880EVM-008, TPS23880,
I have built a smaller footprint version of the TPS2372 evaluation board, however when I connect to a POE switch the switch does not recoginze the device and will not provide power.
Connecting other PoE devices to the switch has no problems.
I have also connected a dumb poe injector (48V straight dc input) and the device works.
Autoclass is pulled low.
The schematic is based on the reference design. Currently I have nothing connected to the output, and the output capacitor is 100uF. I have also tried every combination of class resistors, AMPS_CTL, and autoclass headers.
I have multiple devices made with the same board and schematic, and some of them do actually work, however all the connections on the non-working devices seem good, and I have replaced the TPS2372 chip multiple times.
When viewed with oscilloscope, when the ethernet wire is inserted into the jack, it looks like there is an determining device class, however it looks like it is unsuccessful.