A separate controller PWMs {TAIL ~ the second switch} generating the output at {HEAD ~ the secondary side} of the transformer 
A separate controller PWMs { TAIL ~ the second switch } generating the output at { HEAD ~ the secondary side } of the transformer
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH