modelling class d amplifiers in simulink

hye guys, I'm looking to model a class d amplifiers in simulink, any idea on how I can do that? I had already built the PWM generator, but I don't know how to connect it to the half bridge configuration (MOSFETS). I really need help here as I had been stucked doing this for days. Any tips or links will be very helpful. I dont expect much, just that I want to know where to begin.

Thanks in advance for any help.