POWER SUPPLY DEVICE AND LIGHTING FIXTURE

摘要

PROBLEM TO BE SOLVED: To provide a power supply device and a lighting fixture capable of supplying a stable AC output or DC output which is suitable for a discharge lamp or an LED element as a light source.

SOLUTION: A light source determination part 202 of a control part 20 determines whether the light source is the discharge lamp 30 or the LED lighting lamp 32, on the basis of a resistance value of a filament 302 of the discharge lamp 30 and a resistance value of resistance elements 34 (35) arranged on the LED lighting lamp 32. If determined that the light source is the discharge lamp 30 on the basis of this determined result, a high frequency AC output is supplied to the discharge lamp 30 by forming an inverter circuit with an output generation circuit 21. If determined that the light source is the LED lighting lamp 32, a DC output is supplied to the LED lighting lamp 32 by forming a step-down chopper with the output generation circuit 21.

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