| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device which can use an element which is lower than a conventional element in withstand voltage as an element of a secondary side when load requirement voltages are the same, and can be reduced in size and cost as a whole, in the power supply device comprising a converter whose primary side and secondary side are insulated from each other by transformer. SOLUTION: The converter 13 constituting the power supply device 11 comprises a primary-side oscillation part 15 to which high-voltage DC power HV is inputted, and a secondary-side rectification part 16 which is insulated from the primary-side oscillation part 15 by the transformer 12. An output terminal 16a at the positive side of the secondary-side rectification part 16 is connected to a positive-side terminal 14a of a battery 14, and a negative-side terminal 14b of the battery 14 is grounded. That is, the output terminals 16a, 16b at the secondary side of the transformer 12 and the battery 14 are connected to each other in series. The converter 13 is a step-down type converter. COPYRIGHT: (C)2008,JPO&INPIT
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