I need to design a AC-DC isolated PFC supply similar to the HR1211 eval board except the output needs to be 500-600VDC approx 1amp. Can you suggest the changes to the HR1211 reference design and do you have any support for the transformer design: core, material, inductance, gap etc?
PFC stays the same output transformer goes from 3:1:1 to 3:10:10 and don’t bother with synchronous rectification just use some good SiC diodes. also of course use higher voltage rated caps.