New Cree Leds(XHP70 in HI coming 2022)

Prelim Datasheet
XP-P Datasheet
Cheers

Thanks welight

:+1:

+1

If datasheet is correct, it can't touch Osram at higher currents, and will not be able to handle overdrive like Osram.

Two graphs show this:

1) Flux vs temp - Cree (left) drops significantly more at higher temps:

2) Flux vs current - Cree(left) needs 3,0Amps to double flux measured at 1Amp,Osram needs only about 2.35Amps for the same 200% increase; at 3Amps Osram is at ~250%.

Cree at 3Amps (and that's with pulse testing at 25C) looks already close to its peak output, under real life testing peak would be probably at ~4Amps with lumen output marginally better compared to 3Amps.

Vf voltage is also significantly higher compared to Osram.

Agree - I noticed that flux vs. current chart and thought there's no way you 'd get anything out of 5 amps, maybe a little at 4 amps, if the LED can take 4 amps.

Well I guess I’m too slow on this one… I agree with Tom and L4P that the overdriving isn’t going to be there on this one if the prelim datasheet is accurate. 225% relative output max. At 420lm binning, maybe we see 945 lumens. Might be a more efficient alternative at the 3.5A range. Only one way to know I guess.

Thanks for the data sheet welight and thanks for bringing those charts together Led4power. It is unfortunate that the cslnm1 “handles heat” better than the XP-P. I was hoping the latter would do slightly better than the cslnm1 in that area and be able to be overdriven slightly more. The data sheet has bad news there. The good news is that if we can get top bins then it will still be close with a better color temperature.

The output curve sees to peak at ~225%
Even the best bin only does 400lm at 100%, so max would be 900lm best case scenario.
Still definitely worse than the CULNM1 unfortunately (4040 size), and probably also worse than the CSLNM1 (XP size) when you take into account thermals.

The final version of the datasheet:

Nice! So we can expect 720 lumen at 3A, and 5000K, now see how they compare to the Osram version :slight_smile:

18 of these in an MF01S…hmmm…

agreed. ill take a 800-900 (hopeful) lumen K1 with > 500kcd range and 5000k tint. sign me up. :smiley:
plus, 3 amps sounds to me like good battery life?

yup! or 4 of them in a KR4 or D4. I just sold my beautiful brass d4v2 with W2 because i couldn’t justify the 6500k tint any more… It’d be awesome to have similar range in a 5000k tint!

Even with the highest bin, 800lm at 3A won’t give much more than 900lm at the peak of about 4-4.5A

Still quite short of the 1000-1100 of the CULNM1

CULNM1?

90% of cslnmn and 5k is good for me. 3A makes driver options pretty easy and cheap too.

Yeah sorry, that one :slight_smile:

Seems like the XP-P is ‘here’. As in it’s on Cree’s website. XLamp® XP/XT LEDs - Cree LED

1.05*1.05 mm die though, so it’s going to need some miracles to compete with the white flats on brightness alone. Likely lower cost, better availability, 5000K cct, and 3535 footprint are a big win though. I like how the surrounding silicone pour is below the plane of the phosphor. This should make for cleaner beams / less artifacts. 3A vs 3A, it should hold it’s own. Looks to be not much room for overdriving. Let’s hope we’re wrong about that somehow.

It has a pretty high forward voltage. The 219b/sst-20/LH351D have a forward voltage under 3.3V at 3A. The Xpp has a forward voltage of over 3.6v at 3A on the datasheet. This should be a fet capable emitter but I don’t see it going much over 800 Lumens even when overdriven.

As soon as one is available at reasonable cost I’ll test it and post results. Latest datasheet only shows U5 bin (360lm) available but in all CCTs. Hopefully 5000K rolls out soon and isn’t puke green.

Edit: The Vf looks to be nearly identical to the Osram Black Flat S (HHL532.TK). Running DD from an LG H26 I see a max of about 4.95A in a super low resistance build. So these should run nicely off of 3500mAh 18650s and 5Ah 21700s