| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a transmission loss and the weight of wiring when power supply from an on-vehicle battery is boosted to be provided to a circuit. SOLUTION: A battery 120 and a boosting type DC-DC converter 142 are installed in an engine room 110, and a circuit load 144 is installed in a trunk room 130. Power is supplied from the battery 120 to the boosting type DC-DC converter 142, and the voltage of the boosted power is supplied to the circuit load 144. A power supply line (a) between the battery 120 and the boosting type DC-DC converter 142 is short, a power supply line (b) between the boosting type DC-DC converter 142 and the circuit load 144 is long. By setting the power supply line (a) for supplying a large current to be short, a voltage reduction on this power supply line (a) is small and the power supply line (b) is set thin. Thus, power supply efficiency is increased, and a weight is reduced.</p> |
