Any thoughts on it with the MT-G2. Multiple Li-ion ability. 6 amps. take the switch off and wire it to an exterior switch. Might be a cheap choice, compared to all the $20 drivers out there.
Anyone?
I ordered two of those last week, currently in transit, so I guess I will know in about 6 weeks or so? lol
What host? That is a large driver
Interesting O-L. I would think from the specs it would work well. Says its CC circuit so it should hold the current at 6 amps if the input voltage is higher than vf plus driver overhead and battery sag factored in. It may even be moddable for more current if those 2 parallel resistors are current sense resistors (R200 & R082). Pretty big driver at 28mm diameter. Who’s going to order one. UPDATE: Comfychair is on the ball as usual, ordered before this thread even started. I’m not buying anything from DX ( I have my reasons). I’ll try to find some other supplier.
Was looking at DX, the other evening, and the same idea crossed my mind, give it a go…
It looks good on the spec. One would have to have to keep in mind that it is advertised as it seems 28mm in diameter and 21mm tall.
http://www.lck-led.com/38mm-side-switch-5000ma-driver-sst50-p-1102.html?cPath=37_135
Even bigger at 38mm but I'm sure it will fit in something.
ID of a D-cell Maglite tube is a hair over 34mm...
I just received one yesterday. I don't think it will work with the MT-G2.
I hooked it up to an MT-G2 with 3S NCR18650's. It worked for couple minutes and then started smoking. I didn't get a chance to measure at 3S. I could not turn it off with the switch.
I then tried to run it with 2S cells. It would only stay in one mode (1.1 amps). After many attempts it changed to a higher mode. It pulled 2.4ish amps, but then started fluctuating and then amperage dropped. Driver became quite hot and I could not turn it off with the switch.
I haven't looked to see what component was smoking yet.
EDIT: I just looked at the driver and tried it out again. Still doesn't want to change modes. Looks like 2 resisters in different areas burned up.
The driver shouldn't be able to tell the difference between a single MTG2 and 2 XMLs in series, right?
The driver would not care if it was an MT-G2 or XM-L in series. I would say that in order to power the driver, you would need a minimum of three Li-ions to give enough voltage under load. If it's like most buck drivers, it needs at least one more volt above what the driver needs, so for 6 amps on an MT-G2, with resistance and sag, I would think the driver would need at least 8 volts minimum to work right. 3xLi-ions.
I would say OL is probably right. 6 amps is going to be quite a strain on most 18650 li-ions.
From Djozz testing it took all most a forward voltage of 7v to reach 6 amps. Factor in the other variables, no way it will work from 2 Li-ions at 6 amps.
So 3 is probably needed to stay in regulation.
There seems to be conflicting info in the ad. It says multiple xml in parallel, but then is shows output of of 3.3 - 10 volts. The inductor doesn't seem like a thick enough gauge.
| Brand | N/A |
| Color | Black |
| Quantity | 1 |
| Material | ENIG PCB |
| Operating Voltage | 7~18V |
| Current | Max. 6A |
| Mode Arrangement | Hi / Mid / Low / Fast Strobe |
| Board Size | 28 x 28 x 2mm |
| Mode Memory | No |
| Functions | Smart driver board |
| Other Feature |
Input voltage: 7~18V; Output voltage: 3.3~10V; Output current: Max. 6A; Working efficiency: 90%; Suitable for multiple Cree XM-L or SSC-P7 emitters in parallel, or SST50; 4-Mode: Hi / Mid / Low / Fast Strobe; With reverse polarity protection; High quality MCU, constant current circuit; A: High light, current: 6000mA 100%; B: Mid light: current: 4000mA, 66%; C: Low light: current: 2000mA, 33%; With 3-second power on memory |
| Packing List |
1 x Driver board 1 x Rubber button |
It does seem like the specs are incorrect. I went by the voltage statement. If that is true, then it would be XM-L in series, not in parallel.
Comfy, I may need to ask you to read a couple of the resistor labels when you get your driver. I can't read the burnt ones. I will try to clean them and see if that helps first. If I do need the info, I'll take a photo and point them out to you.
That will not work with an MT-G2 it can't output more than 3.9V
That's an awful lot of components going to waste then, there are much simpler ways to run a single 3v LED at that output. We'll know soon enough, I guess.
Im sorry to hear about the driver failing ImA4Wheelr. Hope you get it up running again. And thanks for taking one for the team! :beer:
Phew! I almost ordered three. I’m still hopeful though. Perhaps ImA4Wheelr got a faulty one. I’ll be keeping my eye on this thread.
Edit: did you remove the built in switch to connect it? I’m wondering if the switch can’t handle 6A.