Lots of words, this is the only specific information sofar, quote from Cree website:
"The first available family of XHP LEDs is the XLamp® XHP50 LED, delivering up to 2250 lumens at 19 watts from a 5.0 x 5.0-mm package. At its maximum current, the XHP50 provides twice the light output of the industry’s brightest single-die LED, the XLamp XM-L2 LED, at a similar lumens per watt and without increasing the package footprint. By leveraging Cree’s latest reliability innovations, the XHP50 is designed to maintain L90 lifetimes above 50,000 hours even at high temperature and current."
Nothing about exact die size, Vf and so on, and no pictures but this sounds good, doesn't it? I requested a sample, but as a flashlight amateur I'm hardly in a position to have the request granted so I expect nothing from that.
I get the impression that this is the XP-L of XM-L`s if that made sense to anyone. :p Not the successor to XM-L2.
Fingers crossed this will be a nice compromise between XM-L2 and MT-G2 while having full output at 3,3V. ^^ Im guessing its minimum 6v+ for full output though.
Whatever it is, sounds promising..
Which e-mail do we need to spam in order to secure you some samples? J)
I see now at the bottom of of their quite unreadable advert that the voltage will be 6V, or 12V with a different solder pad lay-out :-( . That sounds suspiciously like a multi-die led... And it is all about footprint, not die size, so expect the die to be the full 5x5mm, like they did with the XP-L.
But still, these could become very nice new leds for flashlights!
Multi-die. :Sp I doubt these will be of much use for flashlights. Since the new platform is rated at 105C and can get by with less heat sinking, we should see smaller household LED light bulbs that produce the same lumens as much larger units.
We, and flashlights in general, are not a large enough market for cree to target. None of our LED were designed for flashlights, they just happen fit our use. There is, unfortunately for us, a push toward higher voltage LEDs.
This new LED seems to be more pushing for the Commercial & Residential Lighting applications, ( being 6 & 12 volt config and multiple die set up) definitely not for flashlights. CREE’s most of its market profit likely comes from the general lighting market, while flashlights are only a small percentage.
I think the pad design might cause some shenanagains, from the looks of it there is a positive and negative contact on each side, making the thermal pad ether negative, or positive depending on how it is chosen when running 12v…
My guess is that the die’s can’t actually run at both 6 and 12v but instead the way the center pad becomes hot when in 12v config reroutes the die’s to 2s2p. Or possible each is a 3v die and in 6v they’re 2p2s and in 12v they’re in 4p.
I would not think they would sacrify the neutral thermal path, I'd rather expect that they stuffed an extra diode somewhere on the chip (adding to the Vf?) :
EDIT: this does not explain the polarity independance of the led, hmmm, a complete rectifier in the chips sounds too complex. Who's got the smart solution??
Looking at Flashpilot's picture the combined die-size of the led is indeed larger than the XM-L, testing will reveal the possibilities of this led. And I'm curious about the rest of the XHP-family, perhaps there will be a single-die version with higher luminosity than previous leds.
Going from the picture halo posted the led is on the left, and the solder pads decide the voltage requirement as it sets it between 4s and 2s with 2 channels, i wonder if it could make way for a new rgbw led?
Right now we have MT-G2 which has the same 2250lumen rating for 19W on the Q0 bin. But of course at bigger size than the XHP50
The XHP50 looks like a MK-R 7*7mm (4 dies), especially because know CREE is into using cutting LEDs packages, one of the most notorious one is the 5*5mm XM-L2 refitted into 3.5*35mm XP-L. TheXHP50 is the same theoretical especially due to the cut dome.
CREE is not actually into bringing radical higher brightness LEDs out, but more into re-assigning brightness to lower rated brightness packages.
None of our LED were designed for flashlights, they just happen fit our use. There is, unfortunately for us, a push toward higher voltage LEDs.