Forward boost power converters with tapped transformers and related methods

摘要

In a switching mode power converter coupled between first and second terminal pairs, a first circuit path includes a first inductance and a first switch. A tapped transformer has a first winding coupled across the first inductance and a tapped second winding with a tapped winding portion. A second circuit path includes a capacitance coupled to a second inductance, and the second circuit path is coupled to the first inductance through the tapped winding portion in a third circuit path and through the second winding in a fourth circuit path. During their respective conduction periods, the first switch couples the first inductance across the first terminal pair, a second switch completes a circuit between the second terminal pair and the second circuit path or the third circuit path, and a third switch completes a circuit that includes another of the second circuit path and the fourth circuit path.

主权项

1. A switching mode power converter coupled between a first terminal pair and a second terminal pair, the converter comprising:
a first inductance coupled to a first switch in a first circuit path across said first terminal pair, said first switch coupling said first inductance across said first terminal pair during a conduction period of said first switch; a tapped transformer having a first winding coupled across said first inductance and a second winding, said second winding having a tapped winding portion; a capacitance coupled to a second inductance in a second circuit path, said second circuit path being coupled to said first inductance through said tapped winding portion in a third circuit path and coupled to said first inductance through said second winding in a fourth circuit path; a second switch and a third switch, said second switch operated to be in a non-conducting state when said third switch is in a conducting state and said third switch operated to be in a non-conducting state when said second switch is in a conducting state, said second switch completing a circuit between said second terminal pair and one of: said second circuit path and said third circuit path through said tapped winding portion during a conduction period of said second switch, said third switch completing a circuit comprising another of: said second circuit path and said fourth circuit path through said second winding during a conduction period of said third switch.