We are implementing a 100Mb 803.3af (13W) PoE PD device, power over two twisted signal pairs and 2 spare pairs. This is feeding from PoE Ethernet cable into a "industry standard" Pulse electronics H2019 PoE transformer, as used in numerous TI reference designs.
Do the signals from the PoE Ethernet cable go to the choke side of the H2019 or the transformer side of the H2019 ?
TI reference designs eg SLUA469 "Practical Guidelines to Designing an EMI Compliant PoE Powered Device...." show PoE cable into choke side of H2019 and PMP11107 "Dual Output Class 3 PoE Converter" show PoE cable side into the transformer side.
My feeling is PoE cable to choke side of the H2019 to limit EMI to/from the cable ?