Lynk Labs announces AC LED module that delivers 2000 lm with dim-to-warm technology

[slebans]

http://ledsmagazine.com/news/10/1/10
Mid-power LEDs on the new SnapBrite SR114 module combined with Lynk Labs AC-drive technology deliver 100 lm/W efficacy and dim-to-warm operation for SSL lamps or luminaires.

 

[Illum]

cool, now if they can get rid of the 120Hz flicker...

 

[Steve K]

Is the "dim to warm" feature a pretty new concept? I guess I've heard of something like this on a Philips bulb, maybe?? Interesting concept, and I wonder if I'd notice it or not.

I was reading the article looking for some details regarding what they do to try to minimize the flicker or improve the power factor. All I saw was "Miskin said in the SR114 that all of the LEDs are powered at the same time.", although it was part of a paragraph that mentioned that some manufacturers led the LEDs handle the rectification of the power, where half of the LEDs handle the positive portion and the other half handle the negative portion of the AC wave.

On a related note, I finished up my little project with the Seoul Acrich 2 modules. I'm happy to say that I'm quite pleased with the level of flicker.... i.e. none that I can detect! A batch of pictures documenting the build process is here:
http://www.flickr.com/photos/kurtsj00/sets/72157632507952012/

a photo of the completed assembly:

and a photo of the light compared to a 26W CFL:

 

[Steve K]

on a related note.... I just ran across a couple of IC's from SuperTex.. CL8800 and CL8801. These are "sequential linear LED drivers". They do essentially what the control IC on the Acrich 2 modules do, but with more sub-groups of LEDs. Pretty nice if you want to select your own LEDs, set your own current levels or switch points, etc. Very handy!
http://www.supertex.com/pdf/misc/CL8801_PSS.pdf

About the only thing I don't like is that the package is QFN, which makes it about impossible for someone to etch their own circuit board. Does anyone make a little prototype adapter board for QFN's?