More New Cree Goodness coming....

Like excess solder beads? You can remove them with a razor blade

I think these have to be filled but not sure how much is needed because its in the way of the centering ring. See the two beads one on each side of the LED its below the J? Its meant to be there but it would be better of in a different place.

Even if you put solder in the R position its a bad spot for the centering ring.

Ahhh. Yes. Poor placement indeed. I’d take a mini flat file or even an emery board and sand the solder blobs down a bit. Also, while it may be a pita, grooves could be filed into the centering ring. At least they are 180° apart, so the second idea is probably best

Or drill holes, probably easier.

I would use a scalpel with curved edge to cut away the solder.

Certainly bad board design, at least for flashlight users. It can be converted to 4S or “12V” voltage, but the connection points on the MCPCB are also rather close to the emitter and this could also cause problems with wide base reflectors.

Reflowing the emitter is also a choice, but of course only if you are able and have spare boards. Being thrifty, long ago I chose these

Desoldering pump should do the trick.

Micro shears Just snip the tops off

Has anyone tested the 50.3 emitters in a direct drive setup yet? If so what kind of current did you get?

According to the XHP50.3 datasheet the voltage is the same as XHP50.2 except that the thermal performance of the 50.3 is significantly better so the Vf should be just slightly higher due to that.

Speaking of the thermal performance: the XHP70.3 datasheet says .2° C/W thermal resistance! And the P4 bin will be available. This sucker might hit 10,000 lumens.

That will be exciting. My L6 might need an upgrade.

I Will be buying a couple new convoys JUST to use this emitter in them. Very exciting

I don't mean to sound dumb, but are there DD drivers for 6v/12v emitters? I didn't even know this existed...

There are 3V emitters…

There are. My L6 has one for the XHP70.2. As I recall, the 6V 50s tended to roast under direct drive.

Definitely there are. We use an LDO in place of the D1 diode to knock the voltage down to run the MCU. The 7135's have a problem handling higher voltage at higher amps - I know, I smoked a few. This is why TA went with a resistor bank instead of a 7135 for the low channel -- works excellent with 6V designs, like he did for the BLF GT70 and others. I believe there are other 6V high output FET designed drivers as well.

I miraculously have a 7135 working in my L6 but haven’t been able to replicate the experience in my SP70 - have blown a few, they all failed wide open interestingly. In the L6 the behavior is weird though, the 7135 channel is dimmer the higher the battery (input) voltage. Funny when fresh cells give a super-dim moonlight but when they’re low I can’t look directly at it anymore!

Poor little chip :cry:

Haha it will be a sad day when it quits on me!

Thanks for the advice i ended up using a razor blade, i tried to put one of the XHP50.3 HI in a C8 and i shorted it and killed the boost driver sigh. Its not a great design for flashlights those few extra mm on a normal MCPCB really help. My solder joints where really low but i put tape on the reflector to be safe and the solder undone the tape lol. I also had a really low LED gasket in place and thickish gauge wire. I will reflow the LED onto another MCPCB.

On another note first time i have bought brand name solder and its great, a hardware store here is selling Weller solder 100g 1mm thick for like $10, on par with what i would pay from China for no name stuff. The solder joint was so shiny amazing stuff lol.