| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device and an illuminating fixture capable of appropriately executing a protection operation while dealing with a wide-range load voltage. ! SOLUTION: A lighting device 100 comprises an input terminal 102, a noise suppression circuit 1, a rectification circuit 2, a step-up chopper circuit 3, a step-down chopper circuit 4, a load voltage detection circuit 5, a control circuit 6, a detection voltage variable circuit 8, and an output terminal 104. The detection voltage variable circuit 8 receives an input signal from a terminal C of the control circuit 6, converts a load voltage VF into a voltage having a different level depending on the input signal, and outputs the voltage as a protection voltage Vs. The control circuit 6 receives the protection voltage Vs outputted from the detection voltage variable circuit 8 at its terminal D, and performs a protection operation on the basis of the level of the protection voltage Vs. The control circuit 6 biases the input signa |
