I'm currently designing a PCB that's powered through Power-over Ethernet. It's my first time working with ethernet on a PCB. I've based the schematic on a Development board by Espressif (Link : https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-ethernet-kit.html).
I know that the data line (pin 1 ,2 ,3 & 6 on RJ45) on Ethernet must have impedance matching at 100Ω differential. When it come to the other pin used for the PoE, I didn't find if they need impedance matching (differential) or not?
Thanks for the help