Cree XHP70 up to 4022 Lumens and XHP50 up to 2546 lumens - Multi-die leds.

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DB Custom
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Someone put their XHP70 on the star backwards! Silly

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Impressive, I think you missed your calling, Cree should be hiring you as an engineer

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Silly

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DBCstm wrote:
Silly

In a Tesla that should not be a problem :bigsmile:

The Journal of Alternative Facts TM

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wight
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DBCstm wrote:
Look what I found…

The solder wire above it is .031” Kester EP256, beside it is a capacitor from C1 of an FET board.

nice

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
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LinusHofmann
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Nice!
Man, if only they could squeeze those dies just a little closer together! Silly

We just need a tiny cuttoff wheel on a dremmel, split the four dies carefully along the seams and sand them down a bit, then superglue them back together without the gap, who’s going to try it first? Dale? Party

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I was thinking JB Weld. I spoke to the guy in Honey-I-shrunk-the-kids and he’s pretty sure if we shrunk it on a horizontal plane it’d come out XM-L sized with XP-G sized dies crammed together snug. Think it’s worth a shot?

Apparently the pack-rat in me wouldn’t let me throw it away. It was in the depression under the handle of my 10 drawer kit box. I thought I’d tossed it so I wouldn’t be tempted to Play with a 12A blacklight…

Edit: Pretty compact little XP-L Quad isn’t it? :bigsmile:

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Ok, so let me ask this… since you can plainly see that there are 4 plates to the substrate and since there are 4 connections on the bottom of the emitter to verify they are wired separately, is it not feasible that we could de-dome this array and then airwire it 4P to run on a single 18650 at 3V? A dedicated quad XM class as it were? If not airwire, then modify the star? If I can get my hands on some more of these I think I’m gonna try it…

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In case y’all are wondering why it’s so fugly, I de-domed it hot, running at 12.15A. Then, when some phosphor pulled off one of the dies, I scraped the rest off while it was on and played with the UV mega light for a bit. Wink Most of that was done looking at it through a welders lens while on at full power.

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DBCstm wrote:
Ok, so let me ask this… since you can plainly see that there are 4 plates to the substrate and since there are 4 connections on the bottom of the emitter to verify they are wired separately, is it not feasible that we could de-dome this array and then airwire it 4P to run on a single 18650 at 3V? A dedicated quad XM class as it were? If not airwire, then modify the star? If I can get my hands on some more of these I think I’m gonna try it…

Haha now that would be quite a mod!
Very cool idea, not sure how feasible it is to fiddle with those tiny bond wires though. I remember there was a thread a while ago regarding repairing dead leds by reconnecting the burnt out bond wires. Not sure how successful any of that was though.

wight
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LinusHofmann wrote:
DBCstm wrote:
Ok, so let me ask this… since you can plainly see that there are 4 plates to the substrate and since there are 4 connections on the bottom of the emitter to verify they are wired separately, is it not feasible that we could de-dome this array and then airwire it 4P to run on a single 18650 at 3V? A dedicated quad XM class as it were? If not airwire, then modify the star? If I can get my hands on some more of these I think I’m gonna try it…
Haha now that would be quite a mod! Very cool idea, not sure how feasible it is to fiddle with those tiny bond wires though. I remember there was a thread a while ago regarding repairing dead leds by reconnecting the burnt out bond wires. Not sure how successful any of that was though.
I think I can tell why we can’t do that.

The 4 contact points available after dedoming are the same as the 4 connections available on the bottom of the emitter, nothing extra is available by dedoming. That leaves 4 contact points unavailable to us, they are already connected in pairs. Where are they you ask? In DBCstm’s picture they are connecting the upper left and lower left emitter in series and the upper right and lower right emitter in series. I think it’s very reasonable to assume that this connection is happening directly under the dies.

I hadn’t paid much attention to the subject previously, but in the recommended 12v configuration in Cree’s datasheet the thermal pad is not isolated.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
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Well, it might prove of interest that I realized the comparison shots against my other 2 Eagle Eye X6’s was a bit skewed. The Triple and Quad are running on FET drivers, while the XHP70 had a PZL driver with 7135 regulation chips doling out 5.45A regardless of cells used. A pair of Sony C5’s had the exact same pull as a pair of Red Efest V2 button top 18350’s.

So, I unchained the beast! :bigsmile:

The A17DD-S08 Zener modified driver is now running the show. The pair of Purple Efest IMR18350 allow 7.45A on the top end, with 7 mode levels for easy battery life control.

0.01A for 11.385 lumens
0.10A for 66.93 lumens
0.21A for 158.7 lumens
0.54A for 489.555 lumens
1.86A for 1328.25 lumens
3.81A for 2421.90 lumens
7.45A for 4426.35 lumens
at 30 seconds, after running the other tests, it’s still holding 3650.1 lumens. Considering the small batteries this ain’t too shabby…

I think this solidly surpasses my Triple XP-L now. Smile

Reckon I’ll have to do the beamshot comparison shot’s all over again…

Edit: For chits and grins I stuck the pair of Sony C5’s (waiting for a charge) in the X6 and tried it on the lightbox, using the 14” long 12Ga Turnigy lead to make ground contact. The light box showed me a brief 5530 lumens. Smile Crazy stuff man!

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djozz wrote:

 

 

Thanks Djozz! Nice to see some easily comparable graphs. Always nice to see some graphs and hear your thoughts.

In the future, could you make the 4,5-9 volt range easier to compare when testing emitters in this voltage range?

Do you plan on testing 6v vs 12v configuration some time just to see if there is any difference?

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Thanks also Djozz. It was remiss of me not to comment. Appreciate your hard work as usual.Frown

 

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RaceR86 wrote:

Thanks Djozz! Nice to see some easily comparable graphs. Always nice to see some graphs and hear your thoughts.

In the future, could you make the 4,5-9 volt range easier to compare when testing emitters in this voltage range?

Do you plan on testing 6v vs 12v configuration some time just to see if there is any difference?

I'm not sure what you mean, perhaps that the scaling of the voltage axis can be changed so that the voltages show more accurate? I do not usually do that because then the voltage curves get in the way of the light-output curves, that is why I choose an extended voltage scale, and I choose a max so that the scale fits into the grid that is dictated by the light-output axis. But I realise that the voltage scale does not necessarily have to start at zero, that makes a variant possible that shows the voltage better and still does not obscure the light-output curves completely, is this a better graph?:

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Your latest version is great. Much easier to read. Smile

Beer

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Hmm, I didn’t see the difference in the shape of the Vf plot for MT-G2 vs XHP50 and XHP70 before. (It was there, I just didn’t notice.) It took me a minute to see why they are different. The XHP50 and XHP70 characteristics are compressed on the X-axis vs the MT-G2 because they peak at a lower drive current (in this test at least, maybe things will look different for the XHP70 if djozz is able to test again on a proper MCPCB). That said, I think the shape of the Vf curve may still not be exactly the same. It’s at least a little interseting to me.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
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At a tail measured 7.45A I’m showing 4426 out the front. Considering the small reflector and the nature of the reflector, the losses from that chart make pretty much sense.

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You guys need to pick up the pace with the modding. I’m hankering for a sub $100 16,000 lumen quad XHP70 beast!

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DBCstm wrote:
Someone put their XHP70 on the star backwards! :P

Impressive observation Dale Surprised you're right, I did not have a clue about the polarity of this thing at first, the next reflow of the XHP50 I noticed the symbol on the back. So I guess you looked at the direction of the bond wires on my picture..

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The 4 bond wires in a row are on the positive side. The little symbol on the bottom is a horizontal line intersecting a vertical line (actually a T on it’s side with the horizontal pointing towards positive)

Data sheets are invaluable. Wink

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First shot is the X6 with XHP70 and the new FET Zener modded driver.

Second is the X6 Triple with XP-L V5 2D. I have to correct what I said earlier on the emitters in my Triple. The V6 2C’s are in a different light.

4400 lumens as compared to 3500 lumens. The triple is still the more usable light, in spite of pulling higher amperage. The XHP70 at 7.45A makes some pretty serious heat, pretty fast! And the triple with the CUTE-3 optics has some beam profile to it, with a center spot when seen closer. This XHP70 only has a “hot spot” inside the house at 10-20’ distances.

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I'm waiting for that tree to catch fire one of these nights. XP-L still looks sweeter.

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Old-Lumens wrote:

I’m waiting for that tree to catch fire one of these nights. XP-L still looks sweeter.


We can track LED development by watching the tree dry out in each new picture Dale takes, and the one that sets it on fire will correspond to Cree’s peak stock price. Big Smile

The Journal of Alternative Facts TM

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wight
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DBCstm wrote:
http://imagizer.imageshack.us/v2/1600×1200q90/538/UBjqev.jpg

http://imagizer.imageshack.us/v2/1600×1200q90/538/ugjRtp.jpg

First shot is the X6 with XHP70 and the new FET Zener modded driver.

Second is the X6 Triple with XP-L V5 2D. I have to correct what I said earlier on the emitters in my Triple. The V6 2C’s are in a different light.

4400 lumens as compared to 3500 lumens. The triple is still the more usable light, in spite of pulling higher amperage. The XHP70 at 7.45A makes some pretty serious heat, pretty fast! And the triple with the CUTE-3 optics has some beam profile to it, with a center spot when seen closer. This XHP70 only has a “hot spot” inside the house at 10-20’ distances.

And that’s with the Minnie-M, the tightest Minnie?

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
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CA12881_MINNIE-M

This sits on the heat sink like the one for the triple that Nitro is having made.

The CN10861_IRIS is an Optic that looks like it will sit right on the star and work without it’s holder, no heat sink or anything else required. I don’t have that one mounted in a light as I am out of XHP70’s to try.

Talking about the Eagle Eye X6 as a host still.

wight
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Thanks, just making sure I had my facts straight!

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

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that xhp70 ×6 has a nice beam profile. very smooth and floody with wide spill. it could use a dedome though….
heheh

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DBCstm wrote:

CA12881_MINNIE-M

This sits on the heat sink like the one for the triple that Nitro is having made.

The CN10861_IRIS is an Optic that looks like it will sit right on the star and work without it’s holder, no heat sink or anything else required. I don’t have that one mounted in a light as I am out of XHP70’s to try.

Talking about the Eagle Eye X6 as a host still.


Great work DBCstm. It looks like you found a great simple mod for the X6. The Iris should provide a good increase in throw over the Minnie-M. Especially since you had to cut the Minnie to fit.
_________________________________


Iris

_________________________________


Minnie-M

_________________________________

The Iris for the XHP-50 looks even more interesting and should also fit the host.

wight
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Mmm, FlashPilot I think the Minnie-M did not require cutting: that was the Mirella.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

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