| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a charging device capable of easily realizing miniaturization and low costs without deterioration of a power factor. <P>SOLUTION: A charging device 1 comprises an AC-DC conversion part 2 and a DC-DC conversion part 3. The AC-DC conversion part 2 comprises an input rectification circuit 21 for generating an input rectification voltage by full-wave rectifying an AC input voltage, and a smoothing capacitor 23 for generating a DC voltage input to the DC-DC conversion part 3. The DC-DC conversion part 3 comprises a switching circuit 31 for generating a pulse primary voltage, a transformer 32 for generating a pulse secondary voltage, an output rectification circuit 33 for generating a pulse rectification voltage, and an output smoothing circuit 34 for generating an output voltage. The switching circuit 31 is controlled to provide the output voltage with a pulsating flow by adjusting a time ratio of the pulse primary voltage, and to synchronize a waveform of the output voltage with a waveform of the AC input power from an AC power source 12. <P>COPYRIGHT: (C)2013,JPO&INPIT |
