Please check the attached document.
We use UC2844 as Gate Driver.
We want to fix the frequency(50kHz) and Duty(25%).
We think that This IC can fix the duty cycle if we connect VFB pin and VREF pin. Because voltage of Vref is 5V fixed.
So It is not affected by voltage fluctuation.
Please tell us the value of R1 and R2 when Duty is 25%.
Best regards,
Takahiro Nishizawa