| 摘要 |
<p>According to one embodiment, a power supply device (1, 41, 44, 48) includes a terminal (5) connected to an output of a dimmer (3, 28, 29) connected to an alternating-current power supply (2), a rectifier circuit (10), a switching circuit (17, 42, 45, 49) including an inductor (19), a switching element (21) connected to the inductor (19) in series, and a rectifying element (20), one end of which is connected between the inductor (19) and the switching element (21), and configured to change the switching element (21) to an ON state to feed an output current of the rectifier circuit (10) to the inductor (19), after the dimmer (3, 28) changes from a non-conduction state to a conduction state, when the dimmer (3, 28, 29) is a dimmer (3, 28) of a phase control type, and, configured to change the switching element (21) to the ON state to feed the output current of the rectifier circuit (10) to the inductor (19), after the dimmer (3, 29) changes from the conduction state to the non-conduction state, when the dimmer (3, 28, 29) is a dimmer (3, 29) of an anti-phase control type, , and a DC-DC converter (18) configured to convert the output voltage of the switching circuit (17, 42, 45, 49).</p> |
