| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power supply device that can be downsized by reducing capacitance of a power storage part.SOLUTION: A controller IC1 has a plurality of control modes for controlling a load L, and switches the control mode each time when zero-cross detection means 23 detects interception of commercial AC power supply E by a wall switch SW1 to control opening and closing of switching means 19. While the zero-cross detection means 23 detects the interception of commercial AC power supply E by the wall switch SW1, the controller IC1 stops energization of an internal power supply to the other circuit configuration of a power supply circuit 21 while remaining energization of the internal power supply from the electrolytic capacitor C3 to the controller IC1.</p> |
