Patent ID: 7005761
Filing Date: 2006-02-28
Classification: H02M

Abstract:
1. A circuit configuration for off-load switching, comprising: an energy storage capacitor disposed between first and second supply potentials; a controllable power switch connected in parallel with said energy storage capacitor and having a load path; a diode connected back-to-back in parallel with said load path of said power switch; a resonant circuit connected in series with said load path of said power switch and having a conductance and a capacitor; a semiconductor body holding said power switch and having a first surface, an inner zone of a first conductance type, a base zone of a second conductance type embedded in said inner zone and adjacent said first surface of said semiconductor body, an emitter zone of said first conductance type disposed in said base zone, a field stop zone of said first conductance type adjacent said inner zone and having a higher doping concentration than said inner zone, and a collector zone of said second conductance type adjacent said field stop zone.