As the input voltage VIN 602 increases to a certain level that the duty cycle reaches a maximum threshold level , {HEAD ~ the maximum duty cycle detection logic} 340, which comprises a digital comparator, responds to this condition and sets {TAIL ~ the signal MAX D} to a logical “high” level 
As the input voltage VIN 602 increases to a certain level that the duty cycle reaches a maximum threshold level , { HEAD ~ the maximum duty cycle detection logic } 340 , which comprises a digital comparator , responds to this condition and sets { TAIL ~ the signal MAX D } to a logical “ high ” level
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH