I folks. I thought I'd come here and ask for some advice on a new project after reading some of the posts here to give me various ideas.
Basically I'm building a fiber-optic Daytime Running Light (DRL) kit for a vehicle.
I'm using CREE XML T6 modules (4 in total) and after reading some posts on this forum I've decided to use a Taskled driver.
Just to backtrack a minute, I initially tried a hipCC driver and ran two of the T6 LEDs in series. The driver and the first LED unfortunately blew up within a second of applying power. Something must have shorted out on me, but I'm sure that the circuit design was fine. Anyway, I've got a replacement H6CC driver coming from Taskled but I'm keen not to repeat my costly little mistake, so before starting again with some fresh bits, I wanted to clear up some questions I had and I'm hoping people can give me some advice here.
- OK.. input power is straight from the car (i.e. 12-14v avg.). Do I need to consider anything before hooking that straight into the H6CC?
- I want to be able to run 4 T6 LEDs. Now if I run them all in series, my combined vf would probably be around 14-15v in which case that's probably no good in combination with the H6CC right? So the question I had is whether it's feasible to run the LEDs as 2x2 (twin series LEDs connected in parallel) from the one driver or is it better to get two drivers and just run 2 T6 modules in series (as per my original test) ?
From everything I've read, I know that running the LEDs in parallel is bad voodoo due to the uneven current matching, but are there exceptions to this rule?
Thanks for any advice or hints on a reliable driver design for on running a quad XML-T6 in a vehicle application.