Are there any 17mm buck drivers?

Flashlight Modding and DIY Parts
1

Hi everyone,

I was just wandering if anyone knows where to get some decent buck drivers that are 17 ish mm. Ideally a direct swap for a 7135 base driver or something close. 2.8A or more would be great. Nice 3 mode maybe???

Anything close?

I am trying to find a driver that will be a direct swap for the nanjg type boards so I can use them in my Maglite dropins.

2

Not a direct swap, but the circuit board of this from IO measures in at just a smidgen over 18mm.

With a careful bit of file work I’m sure that it could be reduced to under 18mm, but not quite 17mm…… :frowning:

3

It has a contact board of 20.5mm, aren't there any components on the contact board?

4

The driver board is double sided, but the contact board has no components. It is linked to the driver board by two stiff wires.

This could easily be reduced in size without any probs

5

I don't know that driver specifically but be careful, most of the 'LD-xx' drivers are not buck drivers, but constant current drivers that are made for multi-cell input voltage. If that's the case with this one it'll run a single 3v LED, but not multiples in series or a 6v MTG2 even when the input voltage is higher than the Vf.

6

What kind of current do you get off that board on only one cell?

7

What led are you planning on driving it with and what battery?

8

Its for an XML2 in one of these.

That is why I would like to find a driver with a wider voltage range so I can use it for larger mags, or for li-ion setups.

9

That’s a hard one. :~
The driver linked from IO might have problems with the low voltage step down with the various voltage options. I don’t have the driver, so I cant be sure. That’s a lot of different voltage options your trying to fill. I don’t know of any solution.
You need it to still accept a voltage of 8.4v correct?
Have you tried running 4 Nimh’s with a amc7135 board and a XM-L2? With the higher vf it might work.

10

So, what voltage range are you aiming for? I doubt there are drivers that work well for 2+ LiIon cells AND single cells.. so for single cell applications just stick with the good old Nanjg, for anything else.. depends on the number of cells.

http://www.videofoundry.co.nz/ianman/laboratory/research/driverlist.php?sku=&retailer=&price_min=&price_max=&stock=any&type=any&purpose=any&v_in_min=&v_in_max=8.4&voltage=any&leds=1&leds_incl=any&i_min=2400&i_max=24000&modes=any&size_min=&size_max=&order=drivername

There are quite a few. ;D

11

I dont really need one that spans the gap between the 3-4D cell. I only asked about what kind of current is gotten from that board because it said it would work. If I can just find a buck driver that swaps out for 5 or 6+ volts that would work.