Good source for 20mm 4-5A driver?

trailhunter · 2019-12-23T11:32:12.000Z

Mtnelectronics is out of line of their drivers in this range. Anyone seen a good driver for this limited range?

The_Fat_Controller · 2019-12-23T11:38:25.000Z

what voltage ?

trailhunter · 2019-12-23T11:45:07.000Z

The_Fat_Controller:

what voltage ?

Ah yes, 3v

The_Fat_Controller · 2019-12-23T11:54:22.000Z

best one is probably the Convoy driver there is not much available in 20mm you can add a little resistance to drop it to 5A

trailhunter · 2019-12-23T11:58:54.000Z

The_Fat_Controller:

best one is probably the Convoy driver there is not much available in 20mm you can add a little resistance to drop it to 5A

thanks!

Jerommel · 2019-12-23T12:19:28.000Z

Don’t add ‘some resistance’.
This is a constant current regulated driver.
You can either get the 5 Ampere version https://www.aliexpress.com/item/33007449093.html, but it’s only in 17mm,
or you can change the R010 on the 17mm or 20mm 6 Ampere version into R015 (stack 2x R030 if you have those)
You can find adapter rings from 17 to 20 mm on Kaidomain.

The_Fat_Controller · 2019-12-23T13:36:21.000Z

^ better option ^

Have you got a link to the 6A 17mm version? , thought they only went upto 5A

trailhunter · 2019-12-23T13:50:40.000Z

Jerommel:

Don’t add ‘some resistance’.
This is a constant current regulated driver.
You can either get the 5 Ampere version 1.12€ 83% OFF|17mm Fahrer für SST40 ,4 modi 0.1% 3% 30% 100%, max strom ausgang 5000mA, Temperatur schutz management innen|Taschenlampen| - AliExpress, but it’s only in 17mm,
or you can change the R010 on the 17mm or 20mm 6 Ampere version into R015 (stack 2x R030 if you have those)
You can find adapter rings from 17 to 20 mm on Kaidomain.

Are those adapter rings threaded? They appear smooth like for a press fit

Jerommel · 2019-12-24T03:01:28.000Z

The idea is to solder the ring on the driver and then place it like you would a 20mm driver.
This depends on the light, of course, but usually there’s a retainer ring.

Nachtfeuerzeug · 2019-12-28T20:49:40.000Z

Jerommel:

Don’t add ‘some resistance’. This is a constant current regulated driver.

I thought it was a pure FET driver. I guess I'm only looking for 7135s.

Do you know which level runs at 100% regulated? 3%?

Nevermind. I messaged Simon and he confirmed all modes are regulated.

trakcon · 2019-12-24T04:25:39.000Z

I’ve never used one, but I’ve been planning to use this for an upcoming L2 build: https://led4power.com/product/ld-a4-20-2-12amp-20mm-constant-current-led-flashlight-driver/

Any thoughts?