DTP friendly P channel MOSFET driver
17mm and bigger
did 17mm Oshpark
and 17-24mm Seeed design
Still no reply’s for this revolutionary driver?
Lexel when we can expect it and how much it will cost?
I see MCU there but is it possible that you individually re flash it for costumer demands (I need only Turbo, mid, low without memory effect so it always starts on high.
The parts price will be around 1.3$ less than the other Narsil/Bistro drivers, as the FET is cheaper and no AMCs
The MCU can be Attiny 13a, 25 and 85 or other
Pin 3,5 and 6 are bridged to the single FET, so it is possible to run different 1 channel output firmwares
@Djozz: thank you for testing the Black Flat two years ago! Because of you my big thrower now does 1.7Mcd. We all might have never noticed this LED if you hadn’t tried it.
You’re welcome. But my own first test in a Brinyte B158 made me believe that in practice this led was not so great as the test suggested. Must have been an imperfect reflow. Good that you guys went on with this led. 
I got the first batch 17 and 20mm boards produced
Was it the same LED which you used for the test?
In what distance did you measure the light? You need to be further away compared to the same light with XP-G2 because the LED is smaller.
There might also be another reason. It’s possible that the lens of the Brinyte is not precise enough for such a small LED. You could check this by putting the light into full focus and looking straight at it from a few meters away. The entire lens needs to be yellow (or lit up).
If it’s not, then a fix would be to add a pre-collimator. It makes the LED seem twice as big which “makes it easier” for the lens.
I measured at 7 meter, but an aspheric flashlight measures well at shorter distance just as well.
The Brinyte plastic lens is one of the best I have seen, and much better than any glass lens that I have encountered in various flashlights. The die image is very crisp, if the lens was imperfect you would see the imperfect focus coming from the lens part that gives different focus or chromatic abberations superimposed over the sharp die image. But you don’t see any of that.
Some recent testing with L4P’s Oslon board mafe me realise how sensitive specifically the overdriven Black Flat is for imperfect heatsinking, I really think that it is likely that something like that happened at the time.
I agree, but you never know until you try ;).
Which is the right one to order? What’s 5-pin vs. 2-pin?
https://www.arrow.com/en/products/luwhwqp-8m7n-ebvf46fcbb46-1/osram-opto-semiconductors
https://www.arrow.com/en/products/luwhwqp-8m7n-ebvf46fcbb46-8e8h/osram-opto-semiconductors
All the ones available on mouser and digikey are the 8E8H ones so go with that.
It also says new on arrow, so makes sense to buy the more recent one.
Of course I ordered the wrong ones in a hurry. :person_facepalming:
So, having seen some interesting results from new builds with the Black Flat I just ordered my first ones. I’m thinking about putting 4 in the Sofirn Q8, any reason that won’t work? I don’t need this light to be a lumens boss, but a throwy performance might be very interesting…
They have a very small tab on the outside of each pad, positive and negative, these make up for the 2 additional “pins” so they call it a 5 pin. It mounts the same as all the XP/Nichia/Samsung 3 slot footprints. 
(got this on the data sheet)
The flat black thermal pad is not isolated IIRC, so using it with the Q8 driver could short circuit.
Not sure if it’s a good idea:
That post is a question, maybe I’m missing something. But maybe Q8 reflector is not good for throw.
Sofrin Q8 with XP-L HI is noticably throwier than the BLF Q8. I would expect the Black Flat to produce results of a similar nature.
If the XP-L Hi in the Sofirn Q8 throws 106kcd, as I measured, a Black Flat should throw about 160 kcd, at ~2500 lumen OTF.
If the grounded thermal pad is the only drawback, that can be dealt with. I have Arctic Alumina Thermal Adhesive to make a “mask” between the emitter shelf and MCPCB, I can make polycarbonate screws if need be to ensure the MCPCB doesn’t ground through the mounts. Or I can get ceramic screws. Or nylon ones, whatever. Don’t even need the screws if the MCPCB is glued down in the first place…
djozz? Only 600 lumens per Black Flat? Conservative isn’t it? Reckon I’ll find out, should have the emitters here by end of week and the Sofirn Q8 is en-route… as are new boards from Neven. Of course, the original MCPCB should work fine here…