| 摘要 |
PROBLEM TO BE SOLVED: To shut down an electronic apparatus quickly after a main switch is turned off.SOLUTION: In a power supply device 1, during a normal operation mode, a first DC/DC converter 16 generates a first operating voltage V1 for an engine load 4 from an output of a first capacitor 15. A second capacitor 18 is, in the normal operation mode, charged by the output of the first capacitor 15. In the normal operation mode, a second DC/DC converter 19 generates a second operating voltage V2 for a control load 52 and the like from an output of the second capacitor 18. At a transition to a low power mode, a CPU 51 stops the first DC/DC converter 16 and turns off a relay 111. A second diode bridge 17 rectifies supplied AC power to feed the second capacitor 18. The CPU 51 quickly discharges the second capacitor 18 when a main switch 3 and the like are turned off in the low power mode. |
