At full drive, the converter is working in block mode, and in {HEAD ~ the rest} of the modulation range {TAIL ~ the converter} is working in pulse mode 
At full drive , the converter is working in block mode , and in { HEAD ~ the rest } of the modulation range { TAIL ~ the converter } is working in pulse mode
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH