The intermediate voltage across the capacitor is feedback to the controller which in turn changes {HEAD ~ the PWM signal} to regulate {TAIL ~ the intermediate voltage} 
to regulate
The intermediate voltage across the capacitor is feedback to the controller which in turn changes { HEAD ~ the PWM signal } to regulate { TAIL ~ the intermediate voltage }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL