This seems like the type of question a that could have been answered by a simple google search, however I must be searching wrong, because I've spent a lot of time looking with no luck.I'm trying to figure out what sort of cheap and simple driver I can use to drive 3 or more Cree XML T6 LED's. They have a max current of 3000ma, and I believe a maximum voltage of around 3.35 volts. So if I'm not mistaken, that means that I am to wire the led's in series (I hear this is the best way), that would need a driver that can deliver 3000ma at 10.05 volts. I'm thinking I'd likely use a 3 cell lipo battery to power it, which are around 12 volts. Where could I find a driver for this application?And how about if I wanted to wire say 6 of the LED's in series. I'd need 3000ma at 20.1 volts. How could I find a driver to step up the 12 volts into 20.1 and 300ma?
barely get warm?.. if those cree led's are not producing enough heat to to burn you without a heatsink.... you'll barely hit 100 lumens output!you need a good heatsink and a switching regulator....
A really good, simple and useful current regulator is a simply incandescent light bulb. You can use something like an 1156 backup light bulb. Put a few of those in parallel, and setup your power supply so that you only drop 3 or 4 volts across the bulb. It will give you decent current regulation (i.e. protect your LED modules) and at such a low voltage they will barely get warm and they'll last forever.
I would be very careful about using an incandescent bulb as a current regulator unless I knew that the power supply voltage rises only slowly when switched on. The reason is that an incandescent bulb has a resistance when cold much lower than its resistance when running at normal power - about 10 to 14 times lower for a standard bulb, more for a halogen one. If you are running the incandescent bulb at much less than its rated voltage, the resistance change will be lower, but there will still be a surge of excess current to some degree when you power the system up.