High power led drive reduction voltage regulator circuit diagram

Published:2011/8/22 22:31:00 Author:Rebekka | Keyword: High power , led driver , reduction voltage regulator | From:SeekIC

The input voltage in the whole series or series-parallel LED system is higher than the the maximum forward voltage, the best option is the standard power buck regulator topology. Because it has the output sensor, andit is ideal for constant current drive. In the three standard DC-DC converters(buck, boost and buck - boost), only the buck converter LED driver average load current or IF is equal average inductor current. No matter which controlling method you use, in fact, the output current will not have transient change in any part of the switching loop. This makes it easier to convert the constant voltage source to constant current source. To be more specific, many step-down converters based on constant current circuit can run without output capacitor.



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