| 摘要 |
PROBLEM TO BE SOLVED: To balance output currents even if there is the variation of components, by connecting outputs of a plurality of DC/DC converters in parallel.SOLUTION: In a switching power supply device, the outputs of the plurality of DC/DC converters are connected in parallel. Each of the plurality of DC/DC converters includes: a differential amplifier that amplifies a voltage for which an output current is detected by a current detection element, and generates an output current signal; and a current comparator which corrects a differential signal in accordance with the output current signal of the DC/DC converter's own and the output current signal generated by the other DC/DC converter. In accordance with a maximum offset voltage of the differential amplifier which is included in each of the DC/DC converters and generates the output current signal, impedances of first inputs and second inputs of all the differential amplifiers generating the output current signals are changed.SELECTED DRAWING: Figure 1 |
