The driver is the one for the DQG Tiny, the triple with 26650 that’s so small. They sell it separately. I did have to remove the e-switch and swap it over I think, as the new driver didn’t come with one installed.
I merely cut a small place for the corners of the larger die substrate, removing the very minimum from the reflector base. After the XHP-70’s came out, I put one of those in this light in place of the MT-G2.
My JM26 is nice, very well finished and clean as a whistle. I like it’s style, am still thinking about putting a kill switch in the tail for lockout as it DOES have a drain that will sap the big cell over time.
It is a 2A boost driver ( meaning MT-G2 will get 2A output at 6V from 3.6-4.2V input source). So of course it is is not a 6A boost output as the title implies, I guess it was specified/targeted towards people who are are not familiar with step up and step down drivers, but with linear drivers. But well, I am talking only based on specs, I mean what makes the specs accurate? only testing the output current for various LED voltages 6V, 9V, 12V.
It is 2A(*3) on turbo. Designed to give 2 amps to each emitter on a triple setup. So it will give 6 amps to a single emitter in turbo mode give or take.
Am I way off here? Seeing some of Dale’s flashlights, I seriously doubt he would settle for 2A in a Xhp70
I just took a current reading with a Gold King Kong 4000mAh cell and got 2.67A. I don’t think I did anything to bump the output, but that’s asking a lot of my memory if I did that 5 months ago.
Usually that’s correct, I wouldn’t settle for that low of a current. But if the light impresses me and it’s difficult to repair or place the driver then I tend to play it safe and just enjoy the light. I’ve got plenty of hot rods and dragsters, sometimes it’s nice to just have a smooth ride.
if the 3 original LEDs are switched in parallel and get each 2A then the driver delivers 6A… (at 4V)
if they are in series it just boosts the Voltage up to 12V to get 2A over the led
Yes you are, but a boost driver cannot work with LEDs that need less voltage that the cell has (LED in parallel, for that you need linear drivers or certain buck drivers)
If my cell were fully charged it would probably be very close to 3A on the XHP-70, which of course is a 6V emitter, so that would be the equivalent of a 6A current to a 3V emitter, right?
Regardless, it works, and with a single cell to what is otherwise a dual cell emitter. So it’s magical, special, unique, and a winner. Beat the dead horse if you will, it’s not ALWAYS about maximum output. (I said that? really? I better go lay down for awhile….)
The original DQG Tiny Triple XP-G2 is wired in series, making the emitters need 9.xxV to run. And this is done through the single 26650 cell by this very large and complicated driver.
Edit: Sorry, I see what you did there. The boost driver has to push current to emitters that need a higher voltage than the power supply, hence “boost”. This is why they’re wired in series. Got it.
3V* 6A = 18W (parallel LEDs)
9V* 2A = 18W (series LEDs)
Same amount of power, which is all that matters.
It's boost driver, so you need to measure the output current of the driver, as the input need to be higher, because you have 6V at the LED but the input is 4.2V so the driver needs to use extra current to boost the voltage, thus input current is higher than output current on a boost driver. So that is why it is totally unlike a direct drive circuit or a linear circuit.
So a “boost” driver Steps up the voltage, resulting in lowered output current (vs input current) Reading this it sounds like the JM35 isn’t going to work on 2+ cells?
This is probably a dumb question i’m sure but are/were all MT-G2 emitters 6v? How does the driver work to put the correct voltage to the LED in multi cell MT-G2 lights, (for example the JM30 that can run on 2 or 3 cells)
Yes in essence, more current is drawn to boost the voltage.
That would mean the voltage is over that the LED requires, cannot be boosting, but of course that should result in burning the driver or nothing to happen if there is protection added.
Some MT-G2 are 9V, but I am not sure if any manufacturers uses those.
The driver does not put correct voltage, the driver puts constant current and the LED's voltage is maintained based on that current. If the input is ok with both 2 or 3cells then mostly likely the driver is buck.
I used 3 of the 9V MT-G2 in the BTU Shocker, with it’s 3 cell carrier. I figured the 3 cell configuration had too much current for the 6V emitter, overhead would be too far above, but with the 9V emitters and in 3 parallel it works out quite well.
I seriously considered the JM30 but the lack of a side switch and not being able to use one 26650 cell were the deal breakers for me. This really looks nice!
The Shadow JM35 has arrived to Banggood with MT-G2 or XHP-50 option for $49.95, although it isn’t expected to be actually in stock till 17th of May. I didn’t know it also had a tail switch as well, the Banggood page confuses me. Link here Banggood
