Please help finding XP-G2 on 10mm round boards

Flashlight Modding and DIY Parts
1

I’m looking for 3pcs of XP-G2 leds in 4C tint (but 3* or 5* would do ok) on 10mm round PCBs, to update my old but beloved TK45. Until now I had no luck in finding them. :~

Thanks!

2

You should go with direct copper boards for the much better thermal management, from eBay to can get 10mm XP Sinkpads

http://m.ebay.com/itm/191063997233?nav=SEARCH

You’ll have to reflow the emitters yourself but that’s not really anything hard, you won’t mess the boards up but if it’s your first time reflowing maybe pick up an extra emitter.

3

Thanks, I’ve never reflowed any LED, and I’m afraid to mess things up, but will give it a shot eventually!

About this: why to buy those PCBs instead of reflowing directly on original ones?
I don’t think the TK45 is driven hard at all, so thermal management should be a non-issue (…unless there’s some resistor-mod I’m not aware of that a n00b like me would be able to perform).

P.S.
I like your nick!

4

They’re not in the exact tint you asked about, but IS has them, but not sure if they ship to Italy (you can email or PM them):

Cree XP-G2, 10mm Round MCPCB, R5, 1D Tint (6500K)

http://illuminationsupply.com/pcb-mounted-cree-leds-c-52_36_89/cree-xpg2-10mm-round-mcpcb-r5-1d-tint-6500k-p-215.html

Cree XP-G2, 10mm Round MCPCB, R5, 3D Tint (5000K)

http://illuminationsupply.com/pcb-mounted-cree-leds-c-52_36_89/cree-xpg2-10mm-round-mcpcb-r5-3d-tint-5000k-p-251.html

5

You will see an improvement at anything over 1.2A, I’m sure your fenix is driver atleast that hard.

6

900+ lumens from an XP-G2 LED?! mA up to 4000? :open_mouth: That seems a bit too much to me.

Anyway, the TK45 was rated for 760 lumens output with R5 XP-Gs, I don’t think they are driven hard at all… I would expect less than 1000mA per LED. Unless there’s a way to pop-up drive level I think a ready-to-go 10mm board with a LED already attached is the way to go.

Nichia 219B are tempting too, they should be near the efficiency of XP-G2 in the same tint.

Edit:
selfbuilt measured the drive levels:
Turbo: 1.012A
Hi: 290mA
Med: 77mA
Lo: 5mA

I suppose those are per LED…?

7

Direct heat bonding to stars ARE much better for emitters…plain and simple

Even the XP-G(G2) benefit

I have two XP-G on 16mm sinkpad in a Ultrafire 602C and they get VERY hot even at 1400mA
Of course I had to reflow them…it is actually very easy

First ones I did I used a stainless steel frying pan on my stove…now that I have a hot air rework station it makes it all that much easier

8

http://www.ebay.com/itm/191063997233 this guy can send you an already reflowed led on copper just message him.