Experimental Study of a 6.5kV MOS Controllable Freewheeling Diode

A 6.5 kV controllable freewheeling diode (CFD) has been realized for the first time. A forward voltage V
_F
up to 2.5 V (66 A/cm
²
) and a V
_F
rising over 1.8 V between gate off state and gate on state at 125degC temperature was realized. A reduction of the recovery charge Q
_rr
and consequently reverse recovery energy E
_rec
of more than 35% have been achieved in comparison with a state of the art 6.5 kV emitter controlled diode.