Patent ID: 8373304
Filing Date: 2013-02-12
Classification: H02M,H05B

Abstract:
1. A current-sharing supply circuit for driving a first set of DC loads and a second set of DC loads, said current-sharing supply circuit comprising: a current providing circuit for receiving an input voltage and generating a driving current or a driving voltage; a first output rectifier circuit connected with said first set of DC loads for rectification, thereby generating a first output current to said first set of DC loads; a second output rectifier circuit connected with said second set of DC loads for rectification, thereby generating a second output current to said second set of DC loads; a first current-sharing transformer having a secondary winding coil connected with said first output rectifier circuit; a second current-sharing transformer having a secondary winding coil connected with said second output rectifier circuit; a first current-sharing circuit serially connected with a primary winding coil of said first current-sharing transformer and output terminals of said current providing circuit; and a second current-sharing circuit serially connected with a primary winding coil of said second current-sharing transformer and output terminals of said current providing circuit; wherein said first output current and said second output current are substantially identical by adjusting the equivalent impedance values of said first current-sharing circuit, said second current-sharing circuit, said primary winding coil of said first current-sharing transformer and said primary winding coil of said second current-sharing transformer.