I created a PCB with the W5500 that supports POE. The W5500 works fine when it is powered externally, but it will not connect to the switch when it is powered using POE. I have verified that it is getting the proper 3.3 volts. Everything is based off of the reference schematic and the RJ45 jack I am using is the ARJP11B-MASA-B-A-EMU2. Are there any changes that should be made to the reference schematic when using POE?
Here is a link to the datasheet for the RJ45 jack. It has a built in transformer.
I think It may be no problem RJ45(ARJP11B-MASA-B-A-EMU2) used.
What did you apply PoE(PD) module?
Could you please send us your schematic or datasheet for poe module?
If possible, I will check your schematic.
I have attached the schematic. Here is a link to the datasheet for the POE module.
Let me know if you need anymore information.
schematic.pdf (78.3 KB)
…Did you check FET(FQP30N06L) turn on status when PG signal is High?
I have checked your schematic. But I wasn’t able to find incorrect-point.
I think your schematic is fine.