Nichia 144A and 229A series: bigger dies, more output, 90CRI included,.......but no thermal slug :-(

clemence · September 1, 2016, 3:56pm

djozz:

A thermal pad is needed because you want to thermally connect the led to the flashlight with no non-metal obstructions, and the electrical pads can not be used for a direct metal connection. The output advantage of a direct thermal path only starts at an out-of-spec current (under 3A a XM-L2 shows hardly an advantage) and gets more when current increases. What would work really well as a non-DTP board would be a non-DTP board like this: !https://farm2.staticflickr.com/1666/25785416473_72a29f05fd_m.jpg! (orange is the copper-poor, blue is the exposed copper for soldering) If the MCPCB is made with an as thick copper-poor as can be produced, the heat will spread sideways fast and have then enough surface area to cross the dielectric layer efficiently. This board can be used with all the two-pad leds that are out there and boost their performance compared to the common boards. No-one makes these, perhaps we can ask Hank to have a Noctigon version of this board designed.

Already made several MCPCB specially designed for this one! You can crash test the LEDs and the MCPCB (I got several CCTs) after Maukka spectral tested them all ;)

The samples took off the factory in Japan in 160829. Don't know how long until they get here.

I created a thread HERE (copied from my thread in CPF), because I didn't know you did it first Worth take a look for some comparison with popular CRI90 Crees. Well, at least spec by spec in the high 90CRI domain, it's superior than comparable XHP50 (colour and performance).

Cheers,

Clemence