| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply isolation device that is constructed with less parts count compared with that in the prior art and can reduce EMI. Ž<P>SOLUTION: In a power supply isolation device, when a first switch group 12 is turned ON and a second switch group 14 is turned OFF by a first ISL signal 18 output from a controller 16, electric power from a DC power supply is accumulated in a first capacitor C1. Then, when a second ISL signal 20 which is an inverted first signal ISL signal 18 is output from the controller 16 and the first switch group 12 is turned OFF and the second switch group 14 is turned ON, the electric power accumulated in the first capacitor C1 is supplied to a second capacitor C2 via the second switch group 14 and the output electric power is extracted from the second capacitor C2. The first switch group 12 and the second switch group 14 are not turned ON at the same time, thereby the DC power supply and the output are isolated from each other. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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