| 摘要 |
<p>PROBLEM TO BE SOLVED: To light an LED load normally even if instantaneous voltage drop occurs.SOLUTION: A sequence circuit 25 is configured so that a first control section (PFC control section 26) and a second control section (step down control section 21) start a first sequence and a second sequence from the beginning, upon receiving a voltage drop signal from a voltage detector (VDC detector 27). An LED lighting device is configured as mentioned above, and when an instantaneous voltage drop occurs, the sequence circuit 25 resets the first sequence of the PFC control section 26 and the second sequence of the step down control section 21, so as to be executed from the beginning. As a result, the LED lighting device can light an LED load 5 normally even if instantaneous voltage drop occurs.</p> |
