This tutorial shows how a common and differential mode input filter interact and work. In the second video, I discuss how an integrated PWM works. I use a simple model to explain the cycle by cycle process of what happens in an integrated PWM.
Part 12 How a input practical input filter works. This video is 38:57 in length
Part 13 How a Pulse Width Modulator (PWM) works. This video is 44:18 in length