XHP70 Seanna build

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XZCendence
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XHP70 Seanna build

I’m working on a build with an active cooled XHP70 and a ledil seanna, I wanna know how far I can push my XHP70, I’ve got a driver than can do up to 75W at 30V so power and cooling ain’t an issue, I just wanna know how far I can push em’ before I fry the poor thing.

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Hoop
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The XHP70 (datasheet) can be wired for 6V or 12V. It is rated for 4800mA at 6V and 2400mA at 12V. (~30W) Whether or not the MCPCB is the “direct thermal path” (DTP) type will effect the achievable output. As always, the best thermal path is achieved with a copper DTP MCPCB. If you have an adjustable power supply: use a lux meter or measure the voltage across a photo diode to determine at what current the light output peaks. This will be the absolute max reasonable drive current. You should be using a constant current power supply.

Here is Djozz’s test of an XHP70 on a copper DTP MCPCB: https://budgetlightforum.com/comment/723307#comment-723307

XHP70 is a quad die LED with large gaps between the dies, so it is probably a bad choice for that optic. Also there is the newer XHP70.2 which has much better performance: https://budgetlightforum.com/node/58094

SBT90.2 is the throw/luminance king at this point in time and would be the ideal LED to use.

Enderman
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You can do 10-12A at 6V with appropriate cooling.

XZCendence
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My MCPCB is wired for 12v so what could I pull off with that?

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XZCendence
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I honestly don’t care if the output looks a little ugly as long as I’m getting decent throw and brightness, but that SBT90 does look interesting, what’s the fastest way I can get my hands on one?

If you're gonna do something, do it in style!
If you're gonna light up a city, do it in 95CRI+!

Enderman
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XZCendence wrote:
My MCPCB is wired for 12v so what could I pull off with that?

Half of what I said previously, just take a look at the djozz test Smile
Hoop
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That optic may or may not project an image of the XHP70 die, meaning the beam could be four distinct squares with a dark X in the middle. Usually no one prefers this result. Test it out and let us know how it goes!

Convoy store and intl-outdoor sell the SBT90.2 but they ship from China so it may take a while. The SBT90.2 is a 3V LED and is rated for up to 18 Amps. Your power supply or driver should be chosen accordingly.

XZCendence
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Overall the artifact is not too bad at like 5% power, I’m thinking if I crank the power high enough, most of the cross artifact might die out.
Also I peeked at the photometric sheet for my optic and they tested it with both the XHP70 and .2 variant and it said the XHP70.2 had a 5 degree FWHM while the XHP70 has a 4 degree FWHM; maybe because of the slightly larger LES? The cross artifact goes away the closer the LED Dome is to the TIR’s hole so hopefully I can get rid of it with the way I mount it. Anyway I’ll try my luck with the XHP70 but I still want to get my hands on that SBT90.2 some day, it should give me a way tighter beam. I attached an image of the seanna just sitting on the XHP70 at 5% power and it’s not too bad

If you're gonna do something, do it in style!
If you're gonna light up a city, do it in 95CRI+!