{HEAD ~ a first switching element} coupled to {TAIL ~ the power supply conversion circuit} and switching the power supply conversion circuit into one of an active state and an inactive state, 
coupled to
{ HEAD ~ a first switching element } coupled to { TAIL ~ the power supply conversion circuit } and switching the power supply conversion circuit into one of an active state and an inactive state ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH