Patent ID: 6166927
Filing Date: 2000-12-26
Classification: H02M

Abstract:
A push-pull converter for converting a predetermined input voltage received across an input comprising a first input terminal and a second input terminal to a selectable output voltage at an output terminal, said push-pull converter comprising:a first switch having a first terminal connected to said first input terminal and a second terminal;a transformer comprising a first primary winding having a first terminal connected to said second terminal of the first switch and a second terminal connected to said second input terminal, and a second primary winding having a first terminal connected to the first input terminal and a second terminal;a second switch having a first terminal connected to said second input terminal and a second terminal connected to the second terminal of the second primary winding;a control circuit having a first output connected to a control terminal of said first switch and a second output connected to a control terminal of said second switch, for cyclically activating said first and said second switches; anda capacitor having a first terminal connected to said second terminal of said first switch and a second terminal connected to said second terminal of said second switch, for clamping a voltage across said first and said second switches to approximately twice said predetermined input voltage when said second and said first switches are activated, respectively.