Hi,
We designed a buck converter for our 802.3bt (71W) PoE application and used LM5088QMH-2/NOPB for it's wide input range after the PoE circuitry. The design is working fine, we got stable 16V output and we are getting around 4A when system is fully loaded. The issue is that inductor is getting really hot after a short while. This concerns us about the long-term reliability and I wanted to ask if it's OK or if there is a problem that we need to fix. We used webench for this design. The inductor we are using is IHLP6767GZER330M11. Also, when we use aux supply (24V) instead of PoE (around 52V), there is less heating. Schematic can be found below:
