{TAIL ~ Field effect transistors} of which ON voltage is lower than {HEAD ~ the forward voltage} of a diode are provided in each of the synchronous rectifier circuits 
{ TAIL ~ Field effect transistors } of which ON voltage is lower than { HEAD ~ the forward voltage } of a diode are provided in each of the synchronous rectifier circuits
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH