Hopefully the thermal resistance is not a game-ender and we’ll still get some good output out of it. The XPG2 thermal resistance is 4C/W.
Yes. This is high compared to the latest 3535 or larger LEDs, but it’s on par with the XQ-E which shares the footprint. Thermal resistance though only matters proportionally to the chips thermal derate curve (think xhp.2 increased performance with equiv °C/W) . According to the datasheets, the improvement in high temperature efficacy (vs XPg2) of the XD16 should offset the higher temps it will see, making it very similar to the XPG2. ALSO, the Vf curve/value will affect the extrapolation of the Flux v Amps as what we should really be comparing in these cases are Flux vs Watts (but circular dependencies arise here so yikes…). Of course this is only eyeballed and napkin type calculations, I’d expect peak output ~6A and 1400 lumens. Sounds too good to be true. But so does the rest of it, at least in my eyes. YMMV.
I still keep imagining 9000 lumens @ ~90lm/W from a 3x3 array (~XML footprint) with amazing throw (XPL HI levels?) and minimal tint shift. Artifacts similar to MTG2, which I find hardly offensive.
@TexasAce
The only thermal values that floated around before were 5°C/W that I remember, so this isn’t a huge departure from that. Let’s also keep in mind the Luxeon V and Nichia E series that claim super low <1 °C/W yet are not crazy impressive (or pathetic for the Nichia) at high currents.
Time will tell.
All good points.
I also would love to see a 3x3 array of these dies done in the same fashion as the xhp35. Or even a 5x5 as a replacement for the xhp70.
Not mentioned yet, the peak efficacy exceeds 170 lm/W. That enables a light that is both high-efficacy (multi-die) flooder and high throw-efficient (1 die) thrower. You can’t do that with Blackie as it’s both larger and way less efficient.
A 3x3 array actually seems to be a practical limit, as it is already RATED at 54W. The XHP70.2 is “rated” at 29W. As you’ve just been realizing that’s a very extreme heat flux to deal with (overdriven) in even the largest air/convection cooled application. We could go 5x5 and run each LED more efficiently, but then we’d lose the throw advantages to gain lumens/W and a larger hotspot (would be nice for a floody, HiCRI, long runtime light). 3x3 seems the best replacement for most aggressively driven existing setups, especially in throwers.
A 3x3 maxed out in Giggles would be amazing. ~XHP35HI throw with greater than 70.2 lumens? Anyone? 
You have convinced me, JaredM. I’m planning on getting some when they are available and putting together a makeshift MCPCB from copper square rod to make a 3x3 array.
Did anyone tried that? 
Are they for sale anywhere?
Where would you get an mcpcb? Would the djozz mcpcb’s work?
Where is Djozz?
He’s busy.
Here. I have something better than my mcpcb, I have a few of clemence’s two-pad mcpcb, it should perform like a DTP-board, or even better.
But first we need a seller
I think this emitter will be potent performer, and his higher forward voltage will make it one of the best led emitters for single cell FET driver configurations.
Then there are these: http://led-mounting-bases.com/new-version/en/actualites/news/new-star-boards-tri-xq-and-quad-xq
This is interesting… http://led-mounting-bases.com/en/led-mcpcb/16853-star-pcb-for-4-leds-cree-xq-e.html
Wonder how hard it’ll be to convince them to make a 3x3
Have you checked out they boards Clemence had made? Perhaps he could whip up a 3x3 after we try this in a 2x2 config.
When I can get the XD16, I will test it on one of his boards
I hardly wait for your review :+1:
2 pc XD16 will fit perfectly on VR16S1. Up to 4 pcs in 4p config (scraping required). Not so with the VR16SP4….
E21A on VR16SP4 (rev. 2)
XD16 on VR16SP4
Zoomed in
The XD16 pads oversized the E21A pads by 0,17mm (at three sides), and the gaps is 0,3 mm as opposed to 0,2 mm with E21A. The board can be used but not a perfect match.
- Clemence
Please make single pad dtp board in classic size (17 and 20 mm). Even if it will not reach surface brightness(probably it will not but fingers crossed) of lets say old version XP-G2 it should be very good performer for single cell fet flashlight(especially aspherical version)
Hope someone will send them to Djozz for testing and of course with your DTP board.
Just regurgitating stuff here, but this was in a email from LpN this morning:
“Cree Launches Industry’s First Extreme Density LED — LED professional - LED Lighting Technology, Application MagazineFREE+Information+Service&utm_campaign=47c4f03172-LED+professional+Newsletter%28LpN%29+Dec+15%2C+2017&utm_medium=email&utm_term=0_ff8d2246a5-47c4f03172%5BLIST_EMAIL_ID%5D&ct=t%28LED+professional+Newsletter%28LpN%29+Dec+15%2C+2017%29&mc_cid=47c4f03172&mc_eid=%5BUNIQID%5D”:Cree Launches Industry’s First Extreme Density LED — LED professional - LED Lighting Technology, Application MagazineFREE+Information+Service&utm_campaign=47c4f03172-LED+professional+Newsletter%28LpN%29+Dec+15%2C+2017&utm_medium=email&utm_term=0_ff8d2246a5-47c4f03172%5BLIST_EMAIL_ID%5D&ct=t%28LED+professional+Newsletter%28LpN%29+~~+Dec+15%2C+2017%29&mc_cid=47c4f03172&mc_eid=%5BUNIQID%5D
http://www.cree.com/led-components/media/documents/ds-XD16.pdf