A good 1S driver to drive a 6 Volts LED would certainly sell.
Nearly ordered a H1-A from Kaidomain, but it has PWM at a clearly audible 3.6 kHz.
I don’t want PWM at all actually…
Flashlight driver yes, it is same than here:
https://budgetlightforum.com/t/-/21505/37
Driver diameter is 26mm but i can use original as contact plate for smaller driver if needed.
And that over 100W would be only “turbo mode”, this really won’t last long for such high power. 
one cell boost driver for xhp35 that gets at least 2.5 amps.
I now made a PCB for a 1S 2A max buck-boost converter, but somebody needs to write some code for it. It works pretty similar to loneocean’s gxb20: Oshpark Link
would take one for my UV light, a high, medium, low without memory
with tailswitch would be enough
Current range is from 14mA to 2A. Regulator IC is TPS63027, MCU is an ATTiny1634. To build the driver, you need a hot air soldering station or an oven, because the regulator IC is a BGA chip.
to build the driver is the smallest problem
more is which parts it needs and which firmware it runs
This is why I have not pursued making any next gen drivers. We don’t have any firmware for the latest MCU’s. Until a new MCU is selected and firmware is ported over to it, we can’t really improve past what we have been ding sadly. The Attiny’s we have been using are simply too large.
Once some firmware for the 1617 or 1616 mcu comes out, then we can really start moving things forward.
But still, we can make some schematics and collect new ideas
Indeed you are doing good work. It is just sad that it can’t be used due to lack of firmware.
A 22 mm boost driver (2.6-4.3V input, 6V output) with high efficiency (98%+) and high output (6V, 7~8A).
So the real discussion should be what ia the best MCU to adopt?
If people like Mike C, Tom E and Toykeeper can come to a MCU to use with more pins then the AT85 this opens the way for next gen schematics right?
From my non technical and non programmer way of looking at things I hope the costs and availability of the MCU can weigh in for it will make it easier to implement in BLF specials if it is good to source and affordable, each cent helps here.
If that’s the next step and it’s feasible from a costs perspective, make it happen 
Kinda, we have already figured that the latest 1616 or 1617 MCU is the best candidate for the next gen MCU. The issue is the firmware to make it work and being able to program it. Last I knew the programmers had not been updated to flash the new MCU’s yet. Only a matter of time until that happens.
The extra pins are important but the extra space and other features of the latest MCU’s is just as important. Particularly with all the features we are wanting to cram into the firmware now days.
Price is not a big deal, even the latest 1617 mcu is cheaper then the attiny85 IIRC.
Yeah the problem with the 1616/1617 is to program it. It uses the new UPDI interface, and the only programmer right now is the Atmel-ICE.
Meh, i’m probably ‘a stick in the mud’ but who really needs more than 3 or 4 modes spaced like 3% - 10% - 30% - 100% ?
Maybe add a 1% mode and a ‘long press’ to go to the previous mode for lumen canons, but what more do you really need?
You only need low voltage protection to be added, and that’s it as far as i’m concerned.
+1
It would be nice if it could be easily adapted for 3 Amperes though (for Nichia 144). This could be done with the firmware or by changing the ‘sense resitor’
And no PWM ! please…
A 17mm version would be awesome too.
You can change the modes how you like them in the firmware (which doesn’t exist). On my experimental buck-boost board (you shouldn’t order that board, forgot some things), you could have 1024 brightness levels to choose from. But the current difference at the high levels is much bigger (2A -> 1,88A …) than on the low end (14mA> 16mA ->…). That’s just how the circuit works (it’s a voltage divider with an OpAmp, forming a noninverting amplifier).
We probably have to wait for these drivers until there is a public datasheet for the MP3429/MP3431 (thanks Jensen567, nice chip you found). But if someone finds a similar chip, just post it.
Right now we can’t even do this, we have zero firmware for these MCU’s. Once we have some firmware adding all the extra features will be just a matter of porting them from the firmware we already have.
Then maybe stick with the older (cheaper?) MCU for now?
I mean it would be cool if BLF came up with a line of drivers “you want but don’t exist”, like aforementioned 1S to 6 Volts (3 to 6 Amperes) w/o PWM. (i keep mentioning that because i really need one).
Could be fixed by making the mode progression non-linear in time. And one wants visual linearity anyway…