driver for 2800ma at 10.8v output?

[kris23]

hey guys, im wondering if theres a place i can get a driver that can handle up to 2800ma at about 9.6-10.8v?

im planning on building a light using 3 MC-Es or P7s in series

im hoping to avoid a direct drive route so i can get the most out of my light without blowing it up...

thanks!

 

[darkzero]

Shark Buck 3A

hipCC

 

[ma_sha1]

Shark Buck 3A

hipCC

Looks like hipCC need minimum 11V input to drive 3 P7

& I am not sure about Shark Buck 3A can drive 3 P7 in series?
If it does, then it'll need >11V input as well, as it's a buck driver.

If you are limitted to use 3 Li ion, then DD may be the only option.
4x Lion should work with hipCC.

 

[Benson]

Off 3 Li-ion, an 8xAMC7135 (low-dropout linear regulator) should work fairly well...

 

[kris23]

8x AMC7135 can run at above 4.8 volts properly?

if so, thats great news for me!

i actually plan to use 9x ni-mh

 

[kris23]

will having LEDs on aluminum stars screwed onto a copper slug result in any significant thermal resistance?

i will use Tunic TX-2 compound (similar compound to MX2 and OCZ freeze better than AS5)

i think i will use Cree MC-Es M bins if i can afford them on 20mm stars

 

[Benson]

8x AMC7135 can run at above 4.8 volts properly?

IIRC it's good for up to 6V, but you can use the other two LEDs to drop the voltage as shown in Download's schematic.

if so, thats great news for me!

i actually plan to use 9x ni-mh

That should work equally well.

 

[kris23]

thought i should just update with a pic of what i have...

3x BOOM MC-E spot reflectors bought 4 just in case i stepped on one

copper slug with fan from TT CPU cooler still needs machining

and a polished aluminum mag whose bezel is shown above

i still need the MC-Es UCL lens and AMC driver

is there any place where i can get M bin MCEs on a 20mm or smaller star board within the US? for a reasonable price? how about the AMC driver?