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

O-L, do you plan do diffuse the reflectors to help eliminate the donut hole? Wondering if you’d use your patented clear overspray technique. Been thinking about that…

LEDDNA is pretty quick, and they had bins not available elsewhere. Rock on!

I don't know yet, if I have to, I will. I plan on doing some testing with a few reflectors I have laying around and see what happens. I plan on doing one led raised off the star surface, with copper, so I can try some different heights of reflectors, to see what effect the it has and see if there is any way to minimize the X mark. I will post the results, with photos.

Thanks Djozz, very useful graph as always! Seems like 10A is a pretty decent spot to run these LEDs at.

Would it be possible to also measure the heatsink temperature in your usual test? As it seems to have such a large effect on the output it would be interesting to see how the heatsink temp ramps up in relation to the the current ramp.

I don’t need 90 of them. I only need one. :expressionless:

“Thank you for your quote request, unfortunately I don’t have immediate stock.

Please do note, the factory MOQ is 90.

If you would like me to send in for a quote, I will need the following:

your company name and address
end customer name and location
project name
annual usage

Best Regards,
Hang Tra

Hang Tra
Arrow eCommerce Support”

10861

173 in stock, ready to ship. One at a time or however you like. :slight_smile:

Can anybody guess what 3 XHP70’s do on a A17DD-S08 driver with a high end Toshiba MOSFET?

SupFire M6? Almost dead cells even? (8 Efest IMR18350 Purple)

:bigsmile:

Just a stab in the dark here. 9522 OTF?

What high end Toshiba MOSFET?

I don’t remember any talk about a toshiba MOSFET only NXP or Vishay ones.

And i guess over 10000 :smiley:

G'Day Dale,

I am guessing about 15,000 to 18,000 Lumens OTF (with fully charged 8 Efest IMR18350 Purple)....

Btw, I want one of those..... ;)

Best Regards,

George

When I first tested it the cells were at 3.95V, almost dead, after the lightbox run. I didn’t run it just tested it. The first reading I got was 12,523 lumens.

So of course I charged the little cells!

13,903.5 lumens out the front, even low does 1408.

I lined up the emitters such that the line between dies pointed towards the middle. This put them diagonal to each other. And the donut hole is there at low, but decreases as the brightness goes up. Turbo is a stupid amount of light!

These are the 6500K variant, the first ones out.

This Toshiba is a new release, it has a plate on top like the one on bottom that solders to the driver. This is supposed to help with heat. It’s rated at 150A, 30V.

Can’t help but wonder what a good set of top end 18650’s would do….

Full out belly roll laughter! Damg, my face hurts! :bigsmile:

:bigsmile: :wink: 0:)

What is the exact name for the toshiba? so i can check if it is available on stores thats available to me like farnell.

But it still is a LFPAK56 sized FET? have there been any discussions in any thread’s on it here on BLF?

I saw it when in announcements when I was looking for something else, looked good, bought 5 of em. $3 each.

TPWR8503NLL1QCT-ND

I have no idea if this performs any better than the SIR800 or PSMNO9R or anything else. I’ll be using the SIR800 mostly now but thought I’d try this out. :wink:

That FET might actually do better on a driver like the LD-1.

Thanks i found it, i guess i buy some of the various like the SIR800 & PSMNO9R because farnell don’t got it yet.

I hope one our spec gurus like wight, comfy or Rufusbduck will weigh in on if TPWR8503NLL1QCT-ND is a good option, i have a really hard time wrapping my head around the spec and the math comparisons on MOSFETs……

EDIT and here he comes…… :slight_smile: thanks Rufusbduck

Would you say the SIR800 & PSMNO9R should still be the better options?

I wants it! I wants the precious!

I put that down to your retinas catching fire :wink:

Very impressive looking FET btw, the RdsON graph is solidly at 1mOhm for our usage range. Low threshold voltage as well, looks really good to me.

Is the “thermal pad” on top electrically connected to any of the other pins? I can’t find any info on that in the datasheet.
Cheers

In a much higher application than ours it’s to be set up in contact with the housing or heat sink for maximum cooling. I know when we were working on the Knucklehead, there was a lot of conjecture about how to cool components so this looked like a great idea to me. I intended to make a small copper heat sink to solder to it, but realized even pushing 3 XHP70’s it’s way down on the bottom end of it’s intended use. Maybe 30A? In a component designed to do 150A? Yeah, not really an issue.