31 May '13, 9am

iWatt aims at low-cost dimable LED light bulbs

iWatt aims at low-cost dimable LED light bulbs

iWatt aims at low-cost dimable LED light bulbs no comment steve bush 2013/05/31 California-based iWatt has announced an ac-dc power chip for low-cost dimmable LED light bulbs. By analysing the applied waveform using state-machine digital processing, the firm is claiming compatibility with most dimmers intended for incandescent bulbs. Hundreds of dimer types are available, varying widely in quality, and firms designing chips for dimmable bulbs have had to start extensive testing programmes. “For the majority of dimmers, we get down to 1%,” iWatt director of marketing Hubie Notohamiprodjo told Electronics Weekly. “For some odd-ball dimmers, we get down to 5 or 3%. Everyone has problems with some dimmers some of the time.” Dimming is configurable to NEMA SSL 6. Another issue is how early bulbs start to glow when the dimmer is increased from zero: the so-called pop-on setting....

Full article: http://www.electronicsweekly.com/news/components/led-ligh...

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