HI
I have just received a prototype of a design using the MP8009A PoE controller. The design I used is as shown in the MP8009A evaluation board documentation, and I have attached it below. The only difference is the transformer used; I used a Coilcraft POE300F-12LD. I have issues with startup where it looks like it is starting up but then appears to go into over-voltage protection. The trace on startup is below: channel 1 is Vsw, channel 2 is VDD, and channel 3 is Vout. At the moment, I am driving a 330R load. Do you have any idea what may be happening?
Thanks
