| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power supply device for a vehicle which can prevent a drop of a voltage of a CPU even if a voltage of an in-vehicle power supply instantaneously drops due to the power consumption of a large-power load, and can be reduced in size by making an auxiliary power supply small in capacity, in the power supply device for the vehicle which feeds power to the large-power load such as an actuator, and the CPU which controls the load. <P>SOLUTION: The power supply device for the vehicle feeds power to both the power load and the CPU which controls the power load, and comprises: a first distribution line for feeding power to the power load from the in-vehicle power supply via a bus bar; a second distribution line for feeding power to the CPU from the in-vehicle power supply via the bus bar; an auxiliary power supply which is connected to the second distribution line, and feeds power to the CPU when a voltage of the bus bar drops; and a backflow prevention part for preventing electric charges accumulated in the auxiliary power supply from flowing to the bus bar. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
