| 摘要 |
PROBLEM TO BE SOLVED: To minimize as much as possible a loss generate during operation of an converter. SOLUTION: This DC-DC converter converts a DC input voltage to a plurality of DC output voltage. The converter comprises circuit stages (6, 7) including switching elements (2, 3, 4, 5) for converting the DC input voltage (1) to a first AC signal (VAC1), a first resonance circuit (8) for converting the first AC signal (VAC1) to a second AC signal (VAC2) used to form a first DC output voltage (14), a second resonance circuit (16) for converting the first AC signal (VAC1) to a third AC signal (VAC3) used to form the second DC output voltage (14), and a control circuit (24) for setting various power supply modes (usual operation and waiting mode) by setting various frequency ranges (Δ1f,Δ2f) for the first AC signal (VAC1).
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