W5500 with POE

Question

Hi, 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. [url]http://www.abracon.com/Magnetics/lan/ARJP11B.PDF[/url] Thanks

peter · Answer

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.

jharris · Answer

Hi, I have attached the schematic. Here is a link to the datasheet for the POE module. [url]http://www.ti.com/lit/ds/symlink/tps2377.pdf[/url] Let me know if you need anymore information. Thank you schematic.pdf (78.3 KB)

peter · Answer

…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.