TPS23756: Asking for the TPS23756 POE design

Hello SHH,

The T2P pin detects if the PSE is a Type 2 (PD Class 4, 25W). 

Back when there was only IEEE802.3.af standard (up to 13W), people called the new IEEE802.3.at standard (up to 25W) "PoE+."

Then anything >25W was called "PoE++"

However, PoE++ is not IEEE802.3.bt standard. 

So the T2P pin shows if a valid IEEE802.3.at 25W PSE is present. 

Does that make sense?

If this post answers your question, please indicate so by marking this thread as resolved. Thank you.

Regards, 

Michael P.

Applications Engineer

Texas Instruments