| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a DC/DC power converter capable of reducing a loss in low load condition even if small and light inductor having low inductance value is used. <P>SOLUTION: The DC/DC converter comprises: two or more switching units consisting of two semiconductor switching elements Sa and Sb, in which each semiconductor switching element S1a, S1b, S2a, or S2b is connected in series; an energy transition capacitor C1 for charging and discharging; an inductor L and a controller. The controller operates in four kinds of switching mode according to the input/output voltage ratio and current direction of the power converter, and performs current discontinuous operation in which inductor current becomes zero during switching operation in the low load condition. <P>COPYRIGHT: (C)2012,JPO&INPIT |
