| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED power supply device capable of suppressing malfunction to momentary drop.SOLUTION: A no-load detection circuit 3 comprises an inductance 30, and impedance element 31, and a switch circuit 32. The inductance 30 is inserted between a choke coil 11 and an output terminal 100 on the high potential side, and configured so as to be magnetically coupled to the choke coil 11. The impedance element 31 is connected in series between one end of the inductance 30 and the output terminal 100 on the high potential side. The switch circuit 32 is configured so as to be turned on when the potential of the output terminal 100 on the high potential side exceeds a prescribed reference value. A control circuit 2 is configured so as to stop switching control when the switch circuit 32 is on. |
