| 摘要 |
PROBLEM TO BE SOLVED: To implement cost reduction and simplification of wiring for lighting control in an LED power supply device for lighting control output of two systems.SOLUTION: An LED power device (100) includes a first DC power supply circuit (200A) for generating DC first output current from an AC power supply (AC) and supplying the first output current to a first LED (70A), a first drive control circuit (500A) for making the first DC power supply circuit output first output current based on a current target value, a second DC power supply circuit (200B) for generating DC second output current from the AC power source and supplying the second output current to a second LED (70B), a second drive control circuit (500B) for making the second DC power supply circuit output second output current based on a current target value, a lighting control circuit (600) for determining a current target value based on an input lighting-control signal and outputting the current target value to the first and second drive control circuits, and operation holding means for holding the second or first current target value to a predetermined value when the first or second DC power supply circuit stops.SELECTED DRAWING: Figure 1 |
