| 摘要 |
<P>PROBLEM TO BE SOLVED: To make voltages of an electricity-storing unit switchable even if passing electric power between the electricity-storing unit and a load portion is large. <P>SOLUTION: This power supply device, which has the electricity-storing unit capable of outputting at least two voltages and a current regulation portion that regulates currents passing through the electricity-storing unit and in which the electricity-storing unit is connected to the terminals of the load portion via the current regulation portion, includes a voltage switching means that alternately operates a first voltage output means S110 and a second voltage output means S140 to repeatedly switch the voltage of the electricity-storing unit between a first voltage V<SB>1</SB>and a second one V<SB>2</SB>in such a way that the terminal voltage of the load portion is lowered to less than the second voltage from the state that the output voltage of the electricity-storing unit and the terminal voltage of the load portion are the second voltage. <P>COPYRIGHT: (C)2008,JPO&INPIT |
