I am designing a Isolated Flyback SMPS with input range upto 1KV and output of 20W. I couldn't found any flyback controller which will support this range.
I found one offline PWM controller named STCH03 which is having limited 650V start-up.
So is it possible to extend the HV pin range of this controller upto 1KV by adding series resistors ?
Or is there any better controller that I can start working with ?
