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Efficient method for interfacing TRIAC dimmers and LEDs

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rajuchaluva
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re: Efficient method for interfacing TRIAC dimmers and LEDs
rajuchaluva   8/31/2011 5:41:27 AM
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Nice information! Thanks.

Greggg
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re: Efficient method for interfacing TRIAC dimmers and LEDs
Greggg   7/13/2011 5:02:33 PM
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The problem with that line of thought is the size of the existing install base, and of course the reluctance of consumers to change to LEDs, let alone the existing dimming infrastructure. Cheers, Gregg LightBased Technologies

GREAT-Terry
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re: Efficient method for interfacing TRIAC dimmers and LEDs
GREAT-Terry   7/5/2011 4:30:08 PM
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Interesting sampling scheme. Can this scheme support very low duty dimming? What is the limit of this scheme?

kendallcp
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re: Efficient method for interfacing TRIAC dimmers and LEDs
kendallcp   7/3/2011 2:42:26 PM
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Nice part, nice design trick, great article. I have a reservation about the whole thing, though, which is nothing to do with this device. It's that we really should try to wean ourselves off the triac-based phase cut dimmer. It's a noisy harmonic-spewing monster that turns a high power-factor load - whether it's a resistive filament or a carefully designed PFC'd LED lamp - into about the worst-PF load you could conceive of. And the utility companies have got to deliver all that harmonic current to you. All this alt.energy stuff like solar is only going to make things worse for the utilities. Inverters are regulated to have a pretty clean sinewave output and don't supply the harmonics. So the current the utility sees is only going to keep getting dirtier, unless we impose tough PF constraints on everything that connects to the grid.

Tadeusz
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re: Efficient method for interfacing TRIAC dimmers and LEDs
Tadeusz   6/29/2011 8:24:03 PM
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I find this article very interesting as it shows that apparently simple electronic schemes open an enormously area of problems and then of thinking and being creative. I will recommend it to my students as an excellent example of good engineering job. Paul

EREBUS0
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re: Efficient method for interfacing TRIAC dimmers and LEDs
EREBUS0   6/29/2011 8:10:09 PM
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I agree with Dr DSP, a very interesting perspective for those of us who are not fully intimate with the evolving LED technology. Thanks

DrFPGA
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re: Efficient method for interfacing TRIAC dimmers and LEDs
DrFPGA   6/29/2011 4:17:54 AM
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This is a great overview and helps explain PFC is a real world design. Good job.

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