| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technology capable of reducing an electric power loss generated in a vehicular power source supply device. <P>SOLUTION: The power source supply device 12 includes a plurality of step-down circuits 23a and 23b mutually different in a conversion efficiency characteristic to an output current value, and a control unit 28 switches the step-down circuits to be put in an electric continuous state with an ECU 13 in response to the output current value of the power source supply device 12. Practically, among the plurality of step-down circuits 23a and 23b, the circuit having the maximum conversion efficiency in the output current value then is selected and put in the electric continuous state with the ECU 13. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
