Crash-testing a XM-L2 and a XP-G2 on copper Sinkpads

Flashlight Modding and DIY Parts
3

I tried to repair a broken bond wire once on a dedomed xpe going wrong and I found it impossible to do. But well, these leds are a bit bigger so I'll give it a try , just dumped them into some Coleman Fuel:

4

Very interesting. Thank you for doing this test and reporting.

5

You Sir is awesome :-)

Thank you for this!

6

Nice test!
In the title, I think it should be “an XM-L2”, with ‘n’.

7

Only if the letter X starts with an E! :p

8

those are some really interesting numbers - sinkpads go along way :slight_smile:

9

Thanks you very much for this info. It was exactly what I have been looking for. I’m planning to spend next months flashlight budget on direct copper bonded emitters and I really was interested to see how far I could push them and at what point I would see diminishing returns as well as failure.

Excellent information and timely too. :slight_smile:

10

Thanks for starting the next round of discussions and for the effort in doing this for the membership. Cheers.

11

Excellent work djozz! Looks like direct-bonding emitters will allow 6-7A drive for flashlight use. I’ve had a few running in the 5.5A territory with no issues. Looks like the die itself is very safe.
Anyone got (access to) a wire-bonding machine? J)

12

I sold mine a few years back. It had a really nice microscope on it…

13

Would be nice to rebond dedomed emitters for 8-9A operation J)

14

Thanks djozz for the information!

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I've resoldered a XPG2 die back onto the substrate, but never tried to mess with the bond wires...

16

Care to try an XML? I wonder if the three wires will raise the ceiling……

17

Why are your PS and DMM voltage measurements off by a volt?

Nice testing, thanks for your efforts! :slight_smile:

18

What an experiment. I am more confident to do 3A for XPG2 now. Thanks.

19

Awesome test! Very informative djozz. I wonder what would happen if you stuck a piece of dry ice under the heat sink :o

20

holy cow.

21

Yes.

Tonight I stuck an XPG2 neutral on a Noctigon inside a Sipik 68. I replaced the driver with a Nanjg 105c with 3 extra regulator chips attached for 4 amps total, running on IMR 14500.

It’s bright, but unfortunately, the focal length is wrong for the new star. I’ll need to file down part of the outside of the pill in order to make it focus properly.

22

As said, the volt reading of the power supply is a bit wacky, in the video it is too low for a while when the actual voltage is higher, then suddenly starts displaying a correct voltage for the rest of the experiment.