Patent ID: 6191957
Filing Date: 2001-02-20
Classification: H02M

Abstract:
A power converter comprising:a power transformer having a primary winding and a secondary winding of a given turns ratio;input means for receiving an input voltage;output means for providing an output voltage;an inductor coupled between the input means and the primary winding of said transformer;first and second power switching means coupled between said inductor and said transformer and operative in an on and off state according to a given duty cycle for controllably causing a flow of current from the primary winding;unidirectional conduction means coupled to the transformer secondary winding for rectifying flux-coupled energy to provide an output voltage Vo to the output means;means for controlling said duty cycle of said first and second power switching means to maintain the output voltage Vo at a preselected level; andmeans coupled to an output terminal of the inductor for providing a current path for discharging the inductor during a predetermined time interval according to the duty cycle of said power switching means.