BOOSTING CHOPPER DEVICE, POWER SUPPLY DEVICE, DISCHARGE LAMP LIGHTING DEVICE, AND LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce power loss by an output voltage detection means and at the same time miniaturize circuit components. SOLUTION: A-boosting chopper device has a main circuit 3 that includes a boosting inductor and a switching means in series and a smoothing means 4 that is connected between both terminals of a switching means 3b, and switches the switching means 3b by a control means 5. In this case, a voltage that is proportional to an output voltage is applied to an output voltage detection means 6 from a feedback power supply 7 that is electromagnetically coupled to the boosting inductor. Since the output voltage detection means 6 operates with a low voltage, power loss can be reduced. Also, since circuit components are compact, an entire device can be miniaturized.