| 摘要 |
The present invention relates to a power converter for converting power from a first voltage level at an input terminal to a second voltage level across an first and second output terminals, the power converter comprising, a first inductor, with one end connected to the input terminal and another end connected to a point with a switched voltage level, a first switch element with a first terminal connected to the point and a second terminal connected to ground and a second switch element connected in series with a capacitor through a first terminal, and a second terminal of the second switch element being connected to the point and the capacitor being terminated to ground, the first switch element is arranged for being operated with a first duty cycle (D), and wherein the second switch element is arranged for being operated with a second duty cycle (1-D), wherein the first and second switch elements are arranged to operated such that their conducting periods are complementary, wherein the switched voltage level at the point comprises of a first pulse generated when the first switch element conducts and a second pulse generated when the second switch element conducts. A magnetic coupled circuit arranged to transform the switched voltage at the midpoint through a primary inductor to a secondary inductor, a first end of the secondary inductor being connected to a first and second diode with opposite polarity, wherein the first diode is arranged to rectify the first pulse and the second diode is arranged to rectify the second pulse and a series connected output capacitor with a common point being connected between the first and second output terminals, the output of the first diode being connected to the first output terminal, the output of the second diode being connected to the second output terminal and the second end of the secondary inductor being connected to the common point. |
