Hi,Not only are you trying to change the duty cycles. You are also trying to change the width of the signal when it is high and low. I am not sure that PWM can do that.
I need to give fire signals to 2 transistors where each signal have the same frequency and duty cycles but shifted around half of the frequency period to each other.
the interleaved boost converter needs a square pulses each one have the same duty cycle but each one is shifted about half of the conduction period like this (check the attachments):