INTEGRATED CONVERTER WITH SINGLE-ENDED CONTROL, POWER FACTOR CORRECTION, AND LOW OUTPUT RIPPLE

摘要

PROBLEM TO BE SOLVED: To provide an integrated converter capable of correcting power factor and reducing output ripple by control of a converter at a subsequent stage without the need of a voltage regulator at an input stage.SOLUTION: Both a filter capacitor 113 and a boost inductor 12 are connected in series to a bridge rectifier 112, and another end of the boost inductor 12 is coupled to a first diode 131 and a second diode 132. One end of an energy storing capacitor 14 is grounded, and another end is coupled to a first transformer T1. A flyback converter 15 includes a second transformer T2, a rectifying diode 153, and a capacitor 154. A primary winding 151 of the flyback converter 15 is electrically coupled to a primary winding 133 of a voltage regulator 13. One end of the rectifying diode 153 is coupled to a secondary winding 152 of the flyback converter 15, and another end is coupled in series to the capacitor 154.