| 摘要 |
A power converting device includes a filter filtering an AC input voltage to generate a filtered voltage, a power factor corrector boosting the filtered voltage to generate a boosted voltage, and a step-down converter reducing the boosted voltage to generate a DC output voltage. The power factor corrector includes a capacitor, an inductor, two diodes and two switches. The inductor has a first terminal coupled to the filter, and a second terminal. The diodes are coupled in series across the capacitor. A common node between the diodes is coupled to the second terminal of the inductor. The switches are coupled in series across the capacitor. A voltage across one of the switches serves as the boosted voltage. |
| 主权项 |
1. A power converting device comprising:
a filter adapted to receive an alternating current (AC) input voltage, and filtering out high frequency noise from the AC input voltage to generate a filtered voltage; a power factor corrector coupled to said filter for receiving the filtered voltage therefrom, said power factor corrector boosting the filtered voltage to generate a boosted voltage, and including
a boost capacitor,a boost inductor that has a first terminal coupled to said filter, and a second terminal,first and second diodes that are coupled in series across said boost capacitor, a common node between said first and second diodes being coupled to said second terminal of said boost inductor, andfirst and second switches that are coupled in series across said boost capacitor, a voltage across said second switch serving as the boosted voltage; and a step-down converter coupled to said power factor corrector for receiving the boosted voltage therefrom, said step-down converter reducing the boosted voltage to generate a direct current (DC) output voltage. |
