| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device for a flight obstacle light and the like using an LED.SOLUTION: In a power supply device 60, input side rectification parts 62 and 77 rectify an AC input voltage Vin having a first ON time period and a first OFF time period, and respectively output DC voltages V63 and V78. A DC/DC converter 70 receives the DC voltage V63 and performs DC/DC conversion to generate a DC output voltage Vout and a DC output current Iout. Timing signal generation means 80 receives the DC voltage V78, and generates a timing signal S95 having a second ON time period obtained by delaying a fall time of the first ON time period and a second OFF time period shorter than the first OFF time period. A comparator 96 calculates a difference S96 between a measurement result of the DC output current Iout and the first timing signal S95. A constant current controller 100 performs feedback control of the DC/DC converter 70 so that the difference S96 becomes zero. |
