| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform high-efficiency power saving during the sleep of a vehicle. <P>SOLUTION: The power source system is equipped with a step-converter 13 which is interposed between electric loads 18 to 20 and a battery 11, and converts to a lower output voltage than an input voltage, a semiconductor relay 14 connected in parallel to the step-own converter 13, a current sensor 15 detecting that it becomes a sleep state where a battery discharge current amount is reduced after a predetermined time elapses from a door lock after key OFF, and a control circuit 16 which opens the semiconductor relay 14 and turns the step-down converter 13 to ON when the sleep state is detected by the current sensor 15 while closing the semiconductor 14 and turning the step-down converter 13 to OFF in a non-sleep state. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
