| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To maximize power supply efficiency of a device adaptively to the operating state thereof to save the power, whereas current consumption characteristic of a logic module is fluctuated depending on the operating state of the device to fluctuate the power efficiency of the device. <P>SOLUTION: A DC-DC power source 100 changes depending on values of input voltage Vm and output current Io. Power Pi at the time of change of Vm of an AC-DC power source 2 is calculated by a control part 21 and an output current measuring part 22 provided in the power source 2, and an algorithm for operation at Vm where the power Pi is minimized is started by operating state information from an autonomous or logic module, whereby delicate optimization control is executed. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
