| 摘要 |
PROBLEM TO BE SOLVED: To prevent instability occurring when changing the number of voltage conversion circuits to be operated in a power supply device configured by connecting a plurality of voltage conversion circuits in parallel. SOLUTION: The power supply device is provided with: voltage conversion circuits of a plurality of channels that synthesize output currents so as to supply the synthesized current to a common load; a load-state calculation means for calculating a value of a current or power supplied to the load; an operating channel number setting means for setting the number of channels of the voltage conversion circuits to be operated; and a signal generating means that controls the voltage conversion circuits in accordance with the number of channels to be set, newly starts at least one voltage conversion circuit and reduces the output currents of the other voltage conversion circuits that are started when increasing the number of channels of the voltage conversion circuits to be operated, and also, stops at least one voltage conversion circuit and increases the output currents of the other voltage conversion circuits that are started when reducing the number of channels of the voltage conversion circuits to be operated. COPYRIGHT: (C)2010,JPO&INPIT
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