New Luminus SST-20 (3535 size)

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Zelda
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New Luminus SST-20 (3535 size)

Luminus has two new types of 3535 leds, one type is 2700 – 4000k @ cri95!
The other is 5000 to 6500k cri70.
https://www.luminus.com/products/white

Edited by: Zelda on 05/22/2018 - 16:58
DavidEF
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Nice. The specs don’t look too special (compared to CREE), but maybe they can surprise us at higher current?

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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hIKARInoob
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It’s 3V, so maybe more mod friendly compared to 12V XHP35?

Barkuti
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Looks  nice. If its die size is no bigger than ≈2mm² and the quality of its output great, could end up being a great alternative to XP-G3s or 219Cs.

We'll see if it looks special or not, DavidEF. Lots of factors matter, particularly CRI + plus saturated colours rendering performance, efficiency, beam pattern and presence/absence of dome, at least particularly for me.

 

Cheers Party

AlexGT
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Dedomed and FET driven! Cool

Barkuti
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AlexGT wrote:
… and FET driven! Cool

What the fuss? A MOSFET is just a switch, very much like the ones below but “integrated”:

 

LoL!

There's nothing intrinsically cool in connecting a led to an unregulated source. These things work because of the usually well beyond specs max driving current an emitter can tolerate, because of cell maximum voltage limits and because usually people don't straight eliminate all current bottlenecks, although many reports of emitters turning blue and dieing lie around, namely with smaller emitters like these and users who don't know better (one can always start measuring ”tailcap” currents with lower battery voltages).

A MOSFET driver can be current regulated too: https://www.fasttech.com/product/4594600 Gonna test one soon.

 

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DavidEF
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Barkuti, the ‘fuss’ about MOSFETs is that they act exactly as you described. Way back before someone shoe-horned a FET in place of regulator chips on a cheap driver, starting this fun ride, the common way to do direct drive was to have no driver at all, and just wire the LED directly to the battery, with a high-current-capable clicky switch to turn it on and off. The newest offerings of fancy buck, boost, and regulated drivers are no substitute for raw maximum power! Evil

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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mattlward
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Gotta say… hoping it does not have the Cree fried egg look. That would be a blessing!

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Convoy S2+, 6*7135, XM-L2 3D, 10 degree TIR, PilotDog lighted tailcap.
Convoy S2+, H17F, XM-L2 4C, lighted tailcap
Zebralight SC52w-L2
Zebralight SC62w
Olight S1A
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BlueSwordM
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Regulated drivers are a substitute FET drivers… if the boost/buck drivers is dual channel and includes a FET MAXIMUM POWER MODE.

A dual channel buck/boost driver would actually be dope AF, and wouldn’t add much to the cost.

mattlward
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Barkuti wrote:

AlexGT wrote:
… and FET driven! Cool

What the fuss? A MOSFET is just a switch, very much like the ones below but “integrated”:


 



LoL!


There’s nothing intrinsically cool in connecting a led to an unregulated source. These things work because of the usually well beyond specs max driving current an emitter can tolerate, because of cell maximum voltage limits and because usually people don’t straight eliminate all current bottlenecks, although many reports of emitters turning blue and dieing lie around, namely with smaller emitters like these and users who don’t know better (one can always start measuring ”tailcap” currents with lower battery voltages).


A MOSFET driver can be current regulated too: https://www.fasttech.com/product/4594600 Gonna test one soon.


 


Cheers Party

OMG the part count is high on that board… I may have to try one for giggles and grins, see what kind of efficiency it has.

EDC rotation:
Convoy S2+, 6*7135, XM-L2 3D, 10 degree TIR, PilotDog lighted tailcap.
Convoy S2+, H17F, XM-L2 4C, lighted tailcap
Zebralight SC52w-L2
Zebralight SC62w
Olight S1A
Olight S1R

BlueSwordM
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Huh, how does that driver work?

Is it a linear regulator or something?

Barkuti
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The MOSFET part on that driver shows a 7520 inscription, found AON7520 and AM7520 related datasheets. A popular PIC12F683, by the way.

 

Cheers Party

gchart
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Spec sheets look good. Standard 70 CRI looks like it might best the XP-G3 by 10% (according to flux binning at highest bins). Slightly narrower beam. Nearly identical pad footprint. This could be an interesting contender.

mattlward
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Did not look at the prints… does it have a neutral thermal pad?

EDC rotation:
Convoy S2+, 6*7135, XM-L2 3D, 10 degree TIR, PilotDog lighted tailcap.
Convoy S2+, H17F, XM-L2 4C, lighted tailcap
Zebralight SC52w-L2
Zebralight SC62w
Olight S1A
Olight S1R

thijsco19
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Always nice to see new LEDs showing up.

So, who’s gonna test them? Silly

gchart
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mattlward wrote:
Did not look at the prints… does it have a neutral thermal pad?

Yup, and a decent size. Like I mentioned, the footprint is nearly identical to the XP-G3. Technically, it’s offered in two footprints: A120 (main size) and B120 (smaller pads). Click for larger images.

Luminus SST-20-W A120 footprint:

Cree XP-G3 footprint:

Edit: I see that the dome on the SST-20 is smaller than the XP-G3: radius 1.3mm vs 1.53mm, respectively. Which makes me wonder if it has a small die? Also, it looks like it has a similar structure as the SST-40 (that is, not a flip chip design) which is reasonably good news for dedoming prospects. Now to find a vendor for these…

Redlyne22
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I got a good feeling about this new sst-20, simply going off of the success of sst-40 (performance, not cri) This might be our next holly grail!!!

Sometimes being a newb is the best part of a hobbie

DB Custom
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And so has anyone thought of one of these in a GT or it’s equivalent? Wink

Data sheet indicates up to around 4A for some 1200 lumens or better, that’s feasible to stuff under a massive reflector. Worth looking into…

Dale

gchart
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I’ve searched around the usual vendors and haven’t located any. Sad If someone finds some, please chime in!

Zelda
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Pushing the new SST-20 to 9A to replace this one? Evil

@gchart:
A small die size would be nice, I still have a quad Maglite with Seoul P4 LED’s Facepalm who is waiting for small die LED’s.

The_Driver
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http://budgetlightforum.com/comment/1316211#comment-1316211

Wink

The high-cri version ist certainly interesting!

finges
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giorgoskok
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I have a feeling we have a new throw king (when dedomed) …

led4power
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Hardly, it should generate ~1700-1800lm (dedomed) to match black flat, and that requires 8-9Amps which this LED would never achieve.

giorgoskok
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Black flat is kind of a weird led to work with , so even if performance is 15-20% better than xp-g2 it will be awesome Smile

Osram LE UW Q8WP is awesome from my point of view (same performance as OBF but double lumens) but costs 10+$ per led , compared to the 1$ of sst-20 ( link )

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The black flat successor KW CSLNM1.TG will not have any of the problems the black flat does, such as non-neutral thermal pad and cut out corner.

The_Driver
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It’s already in “full production”.

Enderman
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The_Driver wrote:
It’s already in “full production”.

The CSLNM1?
Zelda
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Too bad that the two supplier offers only the SST-20 6500k version, which is for a me a litle too cold.

gchart
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Cold, yes. Colder than I usually prefer. But at least if it’s like the SST-40 (as is expected), then it should be a pure white, not blue or purple. I put a few dedomed SST-40’s in Convoy L2’s and actually don’t mind the tint for a thrower.

I pulled the trigger on the Aliexpress listing last week. I can’t wait to see how they perform sliced / dedomed – should be good. Not that I really needed 10 of them Facepalm but at less than $1 each, oh well

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Just ordered 3 of them.
I agree with the last comments, I don’t mind cold white in a thrower.

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