Nice, thanks for the emptienth time
Iāve done a bit of research on led4power drivers and they look great. Do they have an online store?
Yes, Led4power LD-3 heās on version 3 now and a member here at BLF.
Thanks. So the LD-25 is also a led4power driver?
Wow, Iām so impressed with this LD-3 driver. It has everything Iām looking for and more. The configurability is simply AWESOME!
Iāll be ordering the 3A version, so hereās another question please. The efficiency at 6A based on HKJās review is about 95, while the 1.2A medium mode starts at 70.
So at 3A, would you expect the initial efficiency to be closer to 95% or 70? The LD-25 starts at 80 (4.2V in) so this LD-3 is probably much more efficient, but how much?
Also, I take it it will work just fine with both XM-L2 & XP-L2, right? Will the lower Vf of the XP-L2 be an issue for efficiency when coupled with that LD-3, considering that it stays in regulation for much longer?
Oh, I think I finally managed to parse that. So you were essentially saying that replacing the mosfet for a better one, one with a lower āON resistanceā could improve the driverās performance.
This is the mosfet in the LD-25 http://www.onsemi.com/pub/Collateral/NTD70N03R-D.PDF. What would be a good replacement?
OK guys, so I followed your lead and Iām very happy with both the LD-3 driver (really awesome) and the XP-L2 HD emitter (Vf @ 3A measured at 3.24V vs 3.55V for my XM-L2) in terms of performance
The only issue is that the XP-L2 HD is smaller and seems to be out of focus because itās producing an ugly tint shift between the hotspot and the spill, where the spill is much warmer. In short, The hotspot looks good, the spill is noticeably warmer, and the flood (the outer portion of the beam) tends to cool white.
Iāve been googling for a solution but couldnāt find anything. I think getting the emitter a bit further down would improve focus, but I may lose output in the process. Are there XP specific reflectors with a smaller emitter hole?
Thanks in advanced