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