PWM Model for LTSpice

[Scei]

Hello all,

I'm a beginner at LTSpice, and I'm trying to simulate a circuit using the LT3796 Buck Converter with the program; however, I do not now how to simulate a PWM in LTSpice. I'm trying to analyze the PWM control's effects on the current across our diodes.

Could someone point me in the right direction of making a PWM and controlling it? (Possibly simulate it based on a PIC24H series PWM output as that's our current plan)

 

[ronsimpson]

In LTSpice there should be an example circuit for the LT3796.
Looks at /jigs/3796.asc I just tried it. Looks good.