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.
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).
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! :smiling_imp:
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.
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…