I'm trying to find what I thought would be very simple:
A PWM controller that can do 0-100% Duty Cycle and has an error amp WITHOUT VREF connected (i.e. I can supply VREF). I've checked every major supplier up and down with no luck.
I can get around current-mode control by summing OSC ramp with current comparator.
Something like SG1524 that does 0-100% duty cycle would be perfect. Any suggestions?