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