hi
I have design a push-pull 22v to -/+400v supply @20mA each and is stable but when I load the circuit with op amps producing a 0-250v raster at 1Khz then I get a ripple of 1% on my 400v. I require a ripple of 0.25v. the design is in voltage mode, as there is not a large load. Also my sense resistor gets hot, but not my transformer. So I don't think its going into saturation. The CT RT is set at 90Khz for the pwm
part is a UC3825.
Any one got any ideas? I have tried type 2 compensation without success.