Patent ID: 7639520
Filing Date: 2009-12-29
Classification: H02M,Y02B

Abstract:
1. A power supply, comprising: an input for receiving an alternating current (AC) supply; a first converter, said first converter being coupled to said input, said first converter being suitable for converting the AC supply to a direct current (DC) voltage output; a second converter, said second converter being coupled to said input, said second converter being suitable for converting said AC supply to a direct current (DC) voltage output; and a converter controller that responds to a load supplied by the power supply and enables at least one of a first converter and second converter based upon an amount of load supplied by the power supply, wherein only said first converter out of said first converter and said second converter is operating when said amount of load is less than a particular load percentage of a maximum load supplied by the power supply, said first converter and said second converter have a switching frequency of a percentage of a maximum switching frequency which corresponds to a load percentage of the maximum load supplied by the power supply.