| 摘要 |
PROBLEM TO BE SOLVED: To drive a plurality of loads by one load driving circuit without having problems of heat generation and insufficient load driving. SOLUTION: A first load 16 for driving the insertion/exclusion of a display and a second load 17 for driving information storage mediums are connected to an aluminum electrolytic capacitor 14. The voltage (second voltage) of the junction between a first resistor R3 and a second resistor R4, and the voltage (first voltage) of the junction between the second resistor R4 and a third resistor R5 are selected as a reference voltage with a selector 15. By doing this way, the state of control of a switch 11 by a switching power source control IC 12 is adjusted, and charging voltage is changed. Specifically, the first voltage is selected and appropriate voltage is obtained by charging as driving voltage for the first load 16, when the first load 16 is driven. The second voltage is selected and appropriate voltage is obtained by charging as driving voltage for the second load 17, when the first load 16 is not driven. |
