| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device which can use such a device as the backward movement controller, etc., regardless of the power supply voltage of a vehicle being 12 V or 24 V. SOLUTION: When the power supply voltage Vcc1 of a vehicle is 12 V, the voltage is lowered by means of a second regulator 17, etc., by turning on a switch SW so that a voltage of 5 V may be outputted to a central processing unit. When the voltage Vcc1 is 24 V, on the other hand, the voltage Vcc1 is lowered by means of a first regulator 16, etc., by turning off the switch SW, and then, secondarily lowered by means of the second regulator 17, etc., so that the voltage of 5 V may be outputted to the central processing unit. Therefore, a constant voltage (5 V) can be supplied to the central processing unit regardless of the power supply voltage Vcc1 being 12 V or 24 V. |
