{HEAD ~ Transformer leakage inductance energy} is applied to drive {TAIL ~ the pulse width modulator} and the main power switch in a run mode after start up 
is applied to drive
{ HEAD ~ Transformer leakage inductance energy } is applied to drive { TAIL ~ the pulse width modulator } and the main power switch in a run mode after start up
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH