Lexels driver compilation

With my Tail FET board you dont need a driver for DD, just a contact board

The MP3429 is rated 30W constant output while the 3431 50W, not sure what exactly is the difference but I would not gamble

Datasheets of both say exactly the same: “Supports 30W Average Power Load and 40W Peak Power Load from 3.3V”.
Though 3431 has an circuit with 50W consumption among examples. Just from 6V, not 3.3V.

Ok the difference is for the MP3431 to have programmable input current limit, which is good to set for flashlight use

Uh wait… hold on?? ?:

Are you (Lexel) saying I can drive the XHP70.2 (with just one 18650) directly?

I thought I needed a boost driver (or board) to get the power up from one battery (or even “turn on” the XHP70.2).

He means that if you just want to drive the LED directly (either 3V LEDs with 1S or 6V LEDs with 2S) with no modes in a Direct Drive way, you can just turn on the LED directly with the tail switch, FET or not.

Sorry, need more coffee…

- so for a single 18650 I can NOT drive an XHP.XX without boosting up to 6V— correct? Isn’t this why the “boost drive” is in the works?

Sorry guys, I am good at ideas and I do not mean to sound nuts. As I don’t (really) understand the chip problem Lexel is having (getting them), I thought IF there were something (he or loneoceans had) already in the hand (no UI needed- but to JUST boost- with chips IN the hand put on a 21mm board)— I could use it for my C8 gun light project (with my XHP70.2 and one high drain 18650) sooner than waiting for the final boost drive (and also act as a beta- I’d be willing to pop a few LEDs for the cause) :smiley:

received very nice Lexel driver, highly recommended

Those look like my NarsilD’s Lexel sold me for use in my C8Fs. I had to grind my retaining ring at about a 35 degree angle on the side contacting the driver to keep it from catching on those chips on the spring side. Dremel is your friend :wink:

Also, that negative LED connect point does NOT ground to the round outer trace (I found out the hard way)- So I ended up running a touch of flux on it to keep my solder from “running” over to the outer ground trace (outer ring). FYI

You can drive 6V LED with 2 18350 1200mAh cells without driver

Or wait for my boost driver which will be not cheap

You know… I want to buy the FIRST (21mm) boost driver you sell Lexel :+1: :beer:

I was just slummin’ around :sunglasses: for something that might have been doable with available parts since I don’t need a UI- because OF your FET tail switch!

I just want RAW POWER from an 18650 in a C8 with an XHP70.2 (is all) :innocent:

Thanks for entertaining my ideas (and educating me) guys!

Not cheap as in $20-30 or as in $30+?
Either way I’m still in for at least one

about 21€

Mouser managed to restock the chips so I bought now 100

Thanks again Loneoceans (and Lexel)… I (again) appreciate your time and patience as you both educated me here on this post.

I’ll try loneocean’s idea: using TWO 18350s in my C8(s) host I am building up next. I’ll run them DD’ed through a board (with no chips/driver “parts” on it- just a bare board AND Lexel’s FET tail switch).

Lexel just said (in a PM to me just now) that I could run a (shaved) XHP50.2 about as good as it’s gonna’ get for throw (given my form factor and it’s limitations with the C8 and using either DD or his driver)— that was also something I wondered about.

So changing gears from the XHP70.2 to the XHP 50.2 in a high tint— so when I shave the dome, it will fall down to about 5k(ish).

I will also still buy one of Lexel’s drivers when he gets them done too— I LOVE my NarsilDs in my C8Fs.

Love the options guys! You BOTH rock :+1: (… best I can do, no little smily with an air guitar available)

I’m so going to wait for boost driver :slight_smile:

But is it long wait lexel?

Lexel can you make a Buck driver for Convoy L2 to drive a dedomed XP-G2 with 6A and with 2S battery config? Or for maximum throw I will be more happy with one of your Osram black flat drivers in my L2 with a black flat led and 1S battery config? How much current a black flat can handle?

Buck drivers:

Input 2S-25V
Output 1-8A as requested

20mm
4 layer for better thermal properties

Black flat draws too much current from a high drain 26650, better to go with a Buck driver 2S on 4.5A

Hmm. I just like the Short L2 :smiley: But I don’t want to use 26350-s. How much is the too much current? I don’t really care about runtime. Just max throw in a compact form. Or the current will be too much for the driver? Or like the XP-G2 the forward voltage going too high? Sorry for lot question but Soon I will be ordering from you some boards or complete drivers. :money_mouth_face:

DD driver with high drain 26650 and bypassed spring can kill a Black Flat, just too much current

The MOSFET can handle like 30-40A or so on the board thermally

Ah now it is clear! Or I need to make a lot 7135 driver to give the led about 4,5A and I can keep it in single cell form.

stacking 7135s is one option
the other is to have enough resistance from Cell PCB and springs