Using UCC3808X to get ~25% duty pulse train at 120kHz?

[cupoftea]

Hello,
Is it possible to use the UCC38086 to produce an approx. 25% duty cycle pulse train at 120kHz?
(eg by using the inbuilt slope compensation thing)

This (attached) sync circuit needs that….the CD74HC123 shortens the pulses to 400ns.
Sync pulses go into RDM pin of UCC28070A

 

[dick_freebird]

Why not just increase the '123 pulse width setting passive
component values? That could be a 1-line BOM change?

 

[cupoftea]

Thanks, yes youre right, i intend for the '123 to set the pulse width.
But i want to avoid the UCC38086 going to nearly 50% duty at each output......as i think problems could ensue in this cct if it does.....so i picked 25% duty...though is that poss by just using the slope comp feature?