| 摘要 |
PROBLEM TO BE SOLVED: To provide a switching power supply device and a method of controlling the same, capable of detecting frequency characteristics of an output filter including an external capacitor, and of automatically adjusting control response characteristics of a feedback loop.SOLUTION: A switching power supply device comprises: a drive pulse output circuit 36 outputting an analysis drive pulse Vg (B) so that voltage fluctuation caused by frequency characteristics of an output filter 12 appears in an output voltage Vo during a filter characteristic analysis time period; filter characteristic analysis means 40 acquiring time series data of the output voltage Vo at the time when the analysis drive pulse Vg (B) is outputted, and analyzing the frequency characteristics of the output filter 12 on the basis of the acquired output voltage time series data; and control response characteristic determination means 42 determining control response characteristics for a part other than the output filter 12, of a feedback loop, on the basis of the analysis result of the filter characteristic analysis means 40. The drive pulse output circuit 36 outputs a normal operation drive pulse Vg (T) on the basis of the control response characteristics determined after the filter characteristic analysis time period. |
