Switching power supply

Abstract

To provide a switching power supply device capable of achieving high power without increasing complementary gate drive signals.SOLUTION: A resonance capacitor Crk (k is a natural number of 1 to n) of each circuit element has one end connected in series with a resonance reactor Lr and a primary coil N1 of a transformer T and the other end connected with a resonance capacitor Crk of the other circuit element 10 so that Pk (Pk is an arbitrary natural number) circuit elements 10 configure a multiphase LLC converter having a phase difference of 360° / Pk.SELECTED DRAWING: Figure 1

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