Patent ID: 6256211
Filing Date: 2001-07-03
Classification: H02M,H02P

Abstract:
A circuit device for driving an a.c. electric load comprising:a rectifying bridge having a first input connected to one terminal of the electric load, and a second input connected to an outlet of an a.c. main supply, and the rectifying bridge having output terminals connected to a power switch which is controlled by an electric signal;first and second circuit loop-back links connected in parallel to the electric load, and being alternately activated by positive and negative half-waves of the a.c. main supply when the power switch is in an OFF state, wherein the first loop-back link comprises a first selection transistor and a first diode connected between input nodes of the electric load, the selection transistor having a control terminal and first and second conduction terminals; anda second diode non-switchably connected between the control terminal and the first conduction terminal of the selection transistor.