Patent ID: 7035118
Filing Date: 2006-04-25
Classification: H02M

Abstract:
1. Means for controlling a power supply circuit for providing electric power to a load ( 7 ), comprising: a power supply stage having an LC circuit with an inductor ( 4 ) and filter capacitors ( 5 ) and ( 6 ), and a control stage for creating a special switch sequence, wherein the power supply stage comprises a bridge circuit ( 1 ) including two semiconductor members ( 2 , 3 ) connected in series between positive (+V 0 ) and negative (−V 0 ) power supply rails, each semiconductor member comprising a switchable member for conducting current to or from the load ( 7 ) in the forward direction of the semiconductor member under control of a control drive circuit, with a free-wheel diode connected in parallel with the switchable member for conduction of current in the opposite direction; wherein the control stage comprises a monitor circuit for monitoring the bridge voltage (E) of the connection between the two semiconductor members ( a drive circuit adapted to provide a firing pulse to one of said switchable members of said semiconductor members for initiating the conduction thereof; said drive circuit being adapted to terminate the conduction of said switchable member when said first comparator (