| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply controller for vehicle, capable of achieving the maximum reduction effect of power consumption and performing switching operations between DC driving and PWM driving of a load at such timing that a user does not sense the switching operations.SOLUTION: The power supply controller for vehicle includes determination means 5 for determining whether or not detected voltage values of on-vehicle power supplies 1, B are higher than a threshold value and, when the determination means 5 is determined to be higher than the threshold value, PWM-controls voltages of the on-vehicle power supplies 1, B to a target voltage value lower than the threshold value and transmits the PWM-controlled voltage to a load, and further includes means 7, 8, 9 for detecting a power value consumed by the load and means 5, 5a for changing the threshold value to be low or high according to the magnitude of the power value detected by the detecting means 7, 8, 9. |
