[eqvinox]

> - Was having a conversation today about isolation and grounding for POE (product has a metal case). Do you have a reference? Or standard?

Huh. I'm not the GP poster but interesting question. AFAIK there is no proper ground reference on the LAN cable. I'm not sure I've ever seen a metal case… wait, I do, outdoor wifi APs have metal cases sometimes.

If you find out, report back ;D

> - Do you have a part recommendation or reference design for ideal diode POE?

I've done a PoE device (802.3at, 25W) and just went with TI's reference design; the higher power ones use ideal diodes, sometimes there's multiple circuit variants.

(It's not worth mucking with the PoE design for small-scale builds; the reference design might be a bit more expensive but you get that money back on way less trouble to deal with.)