| 摘要 |
<p>A resonant DC-DC converter for converting a d. c. input voltage (Vin) into a predetermined d. c. output voltage (Vout) comprises main switching means (3) for switching said d. c. input voltage under control of switching pulses (Vg1, Vg2) to supply an a. c. voltage to a primary side of a transformer (4), a rectifier circuit (6) connected to a secondary side of said transformer for rectifying an a. c. voltage derived from said secondary side to produce a rectified voltage, and a smoothing circuit (7) connected to said rectifier circuit for smoothing said rectified voltage to produce a smoothed voltage as said predetermined d. c. output voltage, wherein the converter further comprises: a resonant circuit (5, 11) provided at least one of said primary and said secondary sides of said transformer; and a clamp circuit (2) connected to said main switching means and comprising a first capacitor (2-1) and an auxiliary switching means (2-2) serially connected to said first capacitor, said main and said auxiliary switching means being alternately put into an on state under control of said switching pulses. <IMAGE></p> |
