I was wondering if such thing existed.
I mean it can be done on 1.5v AA boosted to 3-4v for common leds
why not 4.2v 18650 boosted to 6v for mtg2/xhp/xpl?
or maybe I’m not doing my homework properly
Others here have used this to drive an MTG-2. Not at 6 amps though. A search should find it.
wow thanks for the find 
The link says this:
Current: Low (2) > Mid (30)>High (1.2A*3)
So, the High mode would be 3.6A? If so, with what would be the calculated watts look like?
4.2V input x 3.6A = 15.2watts?
Might be for series LEDs instead and you wouldn’t use volts in and amps out. If this is the case then it would be
At 1.2A xml2 is not quite 3V so power out would be a bit under 9V x 1.2A = 10.8W or for MT-G2 which has a Vf of ~5.6V at 1.2A about 5.6V x 1.2A or 7.2W
Edit- should be 6.1W.
The reason I question this is that you wouldn’t spec a boost regulator for a situation where input voltage is above output voltage which is what you describe with 3 emitters in parallel.
I would be very interested in this for my MTG2’s, which I typically run at 8.4V input with 5A~6A tailcap draw….40 to 50 watts.
With this Driver and 4.2V input with MTG2. What current draw can we expect/paper math? What raw lumens?
Thank you kindly and sorry for hijacking the thread
bigC
If my understanding is correct ( who know’s?) then output current is 1.2A and raw lumens should be ~750 depending on binning. Very floody but could be a nice EDC tube style or moderately driven C8 with a tail cap current still under 3A. I’m curious to see what actually happens with this but not enough to order one myself.
Yes, such driver already existed in Fenix PD40.
If you are talking about buying such a driver for modding purpose then I am not quite sure about it at the moment.
Maybe somebody can let us know whether the LD-40 can be used as a boost driver or not.
Good news! Looks like I’m wrong again.
I reckon you'd be close with amperage at the led. The readings were at the tailcap in the other thread.