It’s a linear FET driver.
I’d love one with a White Flat 1 inside of an Emisar D1S.
How this new 5A driver is different than previous 8A? Is hardware modified or only firmware? What is MCU?
SST40 with 1800 lumens in an S2+. Ooft. Nice.
Not so recently I noticed the switch retaining ring in a Sofirn C8S host to be reverse threaded. I also noticed this in a recently acquired S2+ host: tailcap switch retaining ring reverse threaded.
Sat, 04/27/2019 - 03:55
on sale tomorrow 
yes, keep current constant when voltage drops
i didnt produce 3A version ,sorry ,
20mm driver with 5A current is in production now ,it needs 10-15days.
S2+21700 will be available soon,maybe 3days
C8+ 21700 (M21A) in stock now ,i will add it in my store ASAP
22mm 5A driver in production now
i’m ready to install CSLNM1.TG in L2 21700 (L21A)
YES, you can order the black L2 and note “silver body” in the remarks
I am not so stingy, instead I can know the advantages of other products. 
[quote=Plotthound]
[quote=Simon Mao]
2019/4/26
Before that, everyone felt that the adjustment of the ramping driver was too much trouble. Now I provide a simple mode 0.1–3–30–100,max current output is 5000mA.This mode can meet most people’s needs and is easy to operate. ,
Its biggest advantage is that no frequency can be seen in any mode, and there is temperature management.
It can control the flashlight temperature not to exceed 55 degrees Celsius,
If the flashlight temperature is below 55 degrees Celsius, it will output full current. If it is above 55 degrees Celsius, it will constantly adjust the current so that the flashlight will not overheat.
I plan to install this driver and SST40 LED into the S2+ host, which has brightness of 1800LM, which meets some people’s needs for small and bright flashlights.
[/quoteA
Nice. Simple is good. Will ramping still be available? A lot of us like ramping. Not too much trouble, just the chart was confusing.[/quote]
Yes, both modes will exist
yes ,20mm SST40 driver (max current 6A) is production now ,it needs 10-15days
linear
This is to prevent loose contact caused by looseness.
Simon please make 16mm or 17mm version please
You really hate my wallet, don’t you? Or maybe you really like it 
Lol, fair enough! Kaidomain do some buck drivers, i linked to this one in the PM:
Also, for a ramping option, have you thought about flashing TKs Crescendo firmware onto your Biscotti drivers to provide ramping on 17mm drivers up to 2.8amps?
I am also working on my CC FET driver again
first prototype board failed, seemed odd but 2 prototypes did not want to cooperate
first Prototype 20mm small LDO and MCU did not work out
new bigger board with SOIC8 MCU and SOT23-5 LDO is now powering up
and its regulating current, fairly low with 250mA ATM but first I need to test out a proper ramping table with Moonlight control over 2 channels
as the OPV is fairly slow with 100nF on its power supply so Gigathrower 2 channel Ramping table does not work out
2. Prototype of 22mm with D1S specifications works
still a few things to be addressed, like The not tented Viases next to the LED- Pad that are ground, they are there to get heat from MOSFET note spread but should be below mask
If the price is right, i can see myself buying many of these drivers.
Any plans for a xhp70.2 version of the S11?