| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply device capable of keeping a required power supply output for a certain time after a power supply input is turned off. <P>SOLUTION: A power supply device includes: a first converter 3 which converts an input voltage into a first voltage; a second converter 4 which converts the first voltage from the first converter into a second voltage; a voltage comparison part 46 which compares the first voltage output from the first converter with a predetermined reference voltage; a voltage comparison result output part 47 which outputs a first signal until the voltage comparison part determines that the first voltage is larger than the predetermined reference voltage and holds an output of a second signal after the first voltage is determined to be larger than the predetermined reference voltage; and a converter control part 48 which controls the second converter to stop when the first signal is output from the voltage comparison result output part and controls the second converter to move when the second signal is output from the voltage comparison result output part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
