Tool/software:
Hello TI team.
Recently I found and issue with the TPS2372-4 evaluation board.
If connected to a PoE++ injector of type POE-171A-95 or POE-171A-60 (manufactuer PLANET, see image attached) I will get unexpected behaviour of TPL, TPH and BT\.
The board is going to pull TPL and TPH low, BT\ stays high.
I tested it with CLSA set to "Class 4",. CLSB set to "Class 6" or "Class 8", AUTOCLS on or off, INRUSHDLY disabled and MPS_DUTY set to 53.4k.
In my eyes it is an undocumented state in the Allocated Power Truth table of page 15-16 in the datasheet.
It's probably telling that only two CAT cable pair is used for power transmission, not all 4.
But LOW/LOW for TPL and TPH is "invalid" anyway.....
I'm pretty confused about that behavior and don't know how to interpret it.
The TPS2372-4 evaluation board is working like expected on a IEEE820.3bt switch.
An evaluation board with STs PM8805 is working like expected with the injectors above.
Could you help me with that?
Thanks for that in advance.
Best regards,
Dr. Alexander W. Lenhardt
