I been looking around for drivers to run 6-volt MT-G2 or XHP70 leds, particularly single-mode and two mode, but not having much luck finding the driver i am looking for. (for one of the many projects in progress.)
Do anyone have links to suppliers, or experience with such a driver?
What kind of host are you planning on using it in? If you are going for 2S setup, any of the FET “direct drive” with zener mod on mtn should do the trick I think?
Not any traditional flashlight host, or using traditional LiIon cells at all. As mentioned above, i need a driver that can run from a 12 volt DC source, ( like a SLA battery or car batery to drive a 6 volt emitter such as a MT-G2 or XHP70 on copper in a large reflector housing.
Ah, sorry… I’m just going to make stuff up until someone that knows better shows up then! 
I thought the XHP70 was 6 or 12V, so it might be possible to direct drive that? Or two MT-G2 in… uh… series (?) would also give you 12v dd possibility?
http://intl-outdoor.com/cree-xhp70-n4-3a-bare-led-6v12v-p-893.html
http://www.mtnelectronics.com/index.php?route=product/product&path=63_111&product_id=437
The MT-G2 is available in two voltage ratings actually, both 6 volt and 12 volt versions. ( i believe the same for the XHP series) Though it woul;d be a bad idea trying to run the 12-volt versions of these emitters from 12 volts without current-limiting drivers or even a resistor (as a car battery or SLA cell is capable of very high current before the voltage drops to safe levels for the LEDs.
How much current to the LED?
Maybe one of the meanwell drivers and a 12v emitter?
If you need 3A or less, use these: http://www.ebay.com/itm/10Pcs-DC-DC-LM2596-Step-down-Adjustable-Power-Supply-Module-CC-CV-LED-Driver-/331798401732
If you need two levels (and have the space) use two boards per LED. Set one for the low, one for the high, switch between them with a on/off/on toggle.
I didn’t know the MT-G2 came in 12v rating. Where do you get that?
Anyway, if you were to use a ~12v emitter (or two ~6v in series) with a ~12v source, couldn’t you just use a zener-modded Qlite to drive it? The driver would regulate current to the LED (s) so shouldn’t be any problem.
Richards buck driver?
3 amps average, give or take a few. if a two mode then the high can be higher.
sorry i meant to say 6/12v for the XHP70 and 6/9v for the MTG
Re-thinking it, for a ‘low’ mode you don’t need a full size DC-DC board, one of the little CV-only postage stamp sized ones will work fine. At lower current heat and falling vF/rising current won’t be an issue. Just adjust the voltage to give the output you need for the low. For the high mode, an adjustable CC source isn’t a terrible idea.
good points. I’m surprised to not find many simple, single-mode drivers to run a 6 volt LED like a MT-G2, XHP50/70 series from a constant 12 volt DC source in the average range of between 1.5 and 3.5 amps at the LED. (as there are many sources for 12 volts DC, Cars, Trucks, RVs, boats, Marine systems, Solar off-grid systems, remote systems, etc. 12 volts DC is the most common consumer electricity standard below 120/240 volts AC household grid power.
What are you looking for? They’re everywhere. They just aren’t called ‘12VDC LED drivers’.
See here, posts #64 & 65, for homemade automotive LED stuff using two different style DC-DC converters. They both have about the same specs, both are CV-only but still work great. The LEDs have vF of 9.5-10V at 1A.
As a workaround you could use a 12V powerbrick and a car cigarette lighter inverter (or there are hardwired car inverters as well)
I already have tons of those drivers that work great for driving lower voltage LED’s like XM-Ls, but when i tried them on an MT-G or XHP70 some don’t work at all and others drive the LED at a lower output.
cool, i would be interested in some of these drivers
A while back i was at Canada computers hand they had 6-12V power bricks (for security cameras i think) being sold for under $20 each, i assume they still have them since they were not on sale or clearance, might do well for XHP50/70