I don’t know about that. Careful battery selection can limit the current draw making it okay to use FET drivers. I’ve got a FET in my L6 and I could swap in a 50.2 and see if my protected KeepPowers would limit current draw to 10 amps or under. They do with the older xhp70. Maybe some protected cells with a lower current limit would be better, like 7 or 8 amps?
Yes, I was estimating what the xhp70.2 would do since it has a much lower Vf then the current gen.
The driver should put out the same current with the same sense resistor, the LED should not have anything more then a minor effect on this if at all.
From my experience, with the batteries we have today, if the heat path is good and you keep the LED reasonably cool, they can generally handle whatever the battery can put out after it runs through a FET driver and reasonable wires (aka, ~20awg or smaller, I tend to use 24awg for these type of LED’s and make them as long as I want).
In fact I have yet to instantly kill one of these latest flip chip LED’s with a battery or on the bench. Only killed them with extended high temp use that ended up burning the silicone or die itself.
That’s what I thought as well since the FX30 is a constant current driver, but I got a big bump up in current from the xhp70 to xhp50.2.
It was suggested that maybe this was due to me using a wire across the sense resistors instead of an actual resistor. Like the wire made the driver go direct drive or something. Does that sound like a possibility?
So maybe the K60 would NOT get a boost in output just by swapping emitters.
Correct, the wire makes it go direct drive, there is no sense resistor in your case. If you instead go with an actual sense resistor then it will regulate the current instead of direct driving the LED.
Okay, that makes sense.
Dang, I was hoping a simple LED swap would give a boost to all drivers to a certain degree.
Oh well, we are back to looking at better bins to get higher output in that K60. Or get an L6 with fet and blow that K60 into the weeds. Lol
Well, you can still resistor mod it without going full direct drive. Although you will be “limited” to around ~7-8A, which is about perfect for most situations honestly.
The XHP70.2 should give a bit more output all else being the same and quite a bit more efficient wile doing it vs the last gen xhp70.
I like a P2 5000K upgrade. For that alone. I wanna see what they do in a MT03 - got one on the way.
P2 5000k 70 or 70.2? I have not seen either of these. Only seen the P2 in the cooler tints.
I think Tom have ordered a XHP70.2 from KD :
http://kaidomain.com/p/S026863.Cree-XHP70_2-P2-3B-Neutral-White-5000K-LED-Emitter
Interesting, high price and sad it is a 3B instead of a 3D but interesting for sure. What is the obsession with the B and C tints? It seems to be way to hard to find the A and D tints.
nice, looks to be designed to minimize that doughnut-hole syndrome of the past XHP-70. Hope they offer it in high-CRI N/W
I think the FX30 driver (Convoy L6) can be beefed up with a more substantial coil.
Correct. I have the XHP-50 Armytek Viking Pro and you almost can’t see the donut hole. With proper focus, this should be easy to correct—much more now with the .2 versions of these powerhouses!!!
What coil? I don’t think I’ve seen one on there.
The Inductor, the square thing a ma jig!!!
Oh, I got ya. I never knew what that was. I’ve never heard of anyone ever replacing it though.
Got a XHP70.2 today - 5000K P2 3B. Has anyone else rcv'd one yet? Debating where to put it. I'd like to try it in the Convoy L6 I have the TA driver in with the SMI reflector, or would also like to try it the MT07, but don't have a custom driver in it, but do have it resistor modded.
A member sent it to me from overseas, along with a SinkPAD. I'll post some pics.
If you use it with the TA driver, be sure to use very long and very thin wires, 24AWG is the largest I would use.
You will need some extra resistance for sure.
Uhh - what am I not understanding about this new LED? Can it be over amped and fried?
Under UV:
Under UV:
The MCPCB is not a SinkPAD, slightly thinner at 1.52 mm, but the traces are wider by far.