help to drive 6x Cree MC-E with a LiPo battery

I need a very very powerful light for short (<1 min.) usages.

I bought:
- 6x Cree MC-E LEDS (total of 24 die)
- a (2200mAh) 7.4V LiPo (2 cells in series) battery that supports max loads of 12C (with a discharge graph similar to the attached one)

I would like to drive each die at 700mA (forward Voltage for MC-E at this mA: 3.4V) and I found this wizard to calculate the resistors and circuit that I need: http://led.linear1.org/led.wiz

Since it's my first time for such a big circuit, could some expert please confirm that I am doing the correct thing? and is there a way to use less resistors (without burning them)?

Lipo cells usually start at 4.2 volts off the charger, so you'd need to use that as your max voltage to calculate resistors.

Ideally though you would use a proper constant current driver circuit.

Foxx510 said:

Ideally though you would use a proper constant current driver circuit.

Click to expand...

I don't think there are constant current drivers equipped to run 6 MCEs at once....so best chance goes to pairing them in parallel

12 700ma AMC7135 regulators? You would give every 2 dies wired in series one of them. Actually, you could probably use 6 1400ma ones and cut a couple traces to split them into 12 700ma regulators.