| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device in which heating is reduced while a device size is decreased. SOLUTION: The power supply device comprises a battery, and both a function for stepping down a prescribed voltage from a battery voltage and a function for stepping up the prescribed voltage from the battery voltage. It has a function for detecting an overcurrent of the output current of the power supply device and a function for limiting the current when overcurrent. The overcurrent detection value has a set value when step down which is different from that when step up. COPYRIGHT: (C)2004,JPO
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