Yupard 3x16340 XM-L light - Driver photo. Solved

Flashlight Modding and DIY Parts
1

So, here's the stock driver out of one of the Yupard 3x16340 XM-L light.

Any ideas on what can be done with it, if possible, to bring the amperage up? Don't ask me the stock amp draw. I have to go set one up and test it to see. Sorry, I will do that tomorrow night... Anyone seen my brain lying around?

Anyhow, I will find out what the driver does stock and let you know.

I wouldn't bother, but I ran out of DrJones drivers and I won't be getting any more for a while, so I need to do something with these stock ones.

EDIT:

The amps to the led on the stock driver are:

1700mA on high

530mA on medium

100mA on low

I removed the R500 resistor right next to the White wire and bridged it and the amps were:

2180mA on high

600mA on medium

110mA on low

I also went and removed the other R500 resistor and bridged that, but I got the same amps readings.

The readings were right off the led. My meter was in the circuit with the positive from the driver to the positive of the led.

2

since I didn’t put any copper under the star… I only put R330 parallel on one of the R500 resistor
didn’t measure the Amp but it surely brighter than the stock :slight_smile:

3

is 3x16340 parallel ? or series connected ?

driver looks like Buck regulator.

4

Parallel

5

that buck regulator may be limit (dropping) current because tight in-out voltage difference

idea:
Directly connect LED negative to supply negative

6

Here's a back-lit photo. Maybe it helps see the circuits.

7

IMO the small “010” or “01C” resistor could be the current sensing element

8

That 01C mean it 10K resistor. that FET (2300) near 01c resistor drive LED PWM.

two R500 resistors are parallel. this is why no further current change after one R500 bridged. current is drop because buck regulator power switch drop.

don’t bridge R500 and connect LED positive wire to supply positive. then you can measure current improvement.

9

Tried that on the other driver. 3 amps, but it comes on when hooked up and no modes and no way to shut it off.

Replacing them with 7135 drivers when I get some. Easier and better UI.