2A Single Mode Driver - 17mm - 3-12V

[wight]

@Ouchyfoot

http://i67.tinypic.com/vse802.jpg
Once I get this installed and running with better heat sinking, and find it runs steady at 2.2-2.5A, how would I go about lowering the current to 2.A.
It’s probably fine as it is, but I wouldn’t mind playing with some options. Like I said, once I deal with the heat sag from my quickie tests, I may be dealing with a slightly higher current.

At a glance it looks like the venerable and common QX9920 buck IC, same as used by Solarforce and many others. Here is an example of SF’s application with pictures and some small amount of discussion.

@Ouchyfoot

How do you think a red XP-E2 will handle … 2.5A?

I think I built a flashlight like that. Red XP-E2 on a Noctigon with a 7x7135 driver for around 2.45A. Seemed fine to me. See here: djozz - blue and green XP-E2, output tests