Finally the XHP70.2 emerges!

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BobbyMK
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Yeah, the price is a bit high, but that i think is because they are the only shop that sells them at the moment. Wait until few other shops list them, kai will adjust the price.. Well at least that happened with the XHP50.2, initially was over $11, now it is less than $8.

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Enderman wrote:
I extrapolated the two V vs I curves and for the 6v emitters, reaching 12 amps will take approx .75 to 1 volt less on the 70.2
Running 2S direct drive won’t be possible anymore due to extremely high currents at 7.4v that would kill the LED instantly.
Although 3S on a 12V emitter will be excellent for direct drive.

This should be possible. I’m running an XHP50.2 80+ CRI direct drive from 2 sony VTC5’s in series. It’s pulling 10ish amps on fresh batteries then settles down to 8ish. Handles 100% absolutely fine but it does get hot rather quickly, not surprising given its in a C8.

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AlexGT
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Anyone knows what is the current bin of the Acebeam K60 in CW? Just wondering if replacing the old emitter with this new one would make a noticeable difference in brightness…

JasonWW
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Texas_Ace wrote:
The stock driver in the L6 might prove to be a good option for the 70.2. With a resistor mod for around 8-10A it should give great output if the driver can hold up to it.

I tested L6 with the FX30 driver stock, with R100 added and with wire across the resistors using Liitokalas and KeepPower 5200 protected cells. All using an xhp70.

The most I could get out of it was 7.7 amps with the wire and Liitokalas.

When you say resistor mod for 8 to 10 amps are you talking about the current xhp70 or is that what your predicting the xhp70.2 will produce?

I’m guessing that your predicting that. With the wire and Liitokalas I swapped in the 50.2 and got about 8.9 amps. So I imagine the 70.2 would be higher still.

A wire on the driver might not be best, though. We might start out with the stock pair of R082 resistors and see what the new 70.2 will do. Maybe 7 amps? Then add resistors to bump it up and see what it can do.

The protected KeepPower 5200 might also be a good choice as it’s output is always less than the Liitokalas.

For instance, on a FET driver my L6 pulled 12 amps on the Liitokalas, but only 9.6 amps on the KeepPowers. They are rated for 10 amps through the protection circuitry. If that’s their limit then you could run any driver with the 70.2 and it would not go over 10 amps.

We need to form a battery list of what their limits are to find good matches with this new 70.2. Anyone else agree?

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JasonWW
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AlexGT wrote:
Anyone knows what is the current bin of the Acebeam K60 in CW? Just wondering if replacing the old emitter with this new one would make a noticeable difference in brightness…

It should be brighter regardless of bin. The 70.2 will probably cause the amp draw to go up. This is assuming the batteries can handle that.

I don’t know what kind of driver the K60 uses, but I’m guessing it will handle the extra amps. This would be a good question for Acebeam since they know their drivers design.

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JasonWW
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Enderman wrote:
I extrapolated the two V vs I curves and for the 6v emitters, reaching 12 amps will take approx .75 to 1 volt less on the 70.2
Running 2S direct drive won’t be possible anymore due to extremely high currents at 7.4v that would kill the LED instantly.

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?

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Texas_Ace
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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.

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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.

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Texas_Ace wrote:

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.

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.

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Texas_Ace
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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.

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Texas_Ace wrote:
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

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Texas_Ace
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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.

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I like a P2 5000K upgrade. For that alone. I wanna see what they do in a MT03 - got one on the way.

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P2 5000k 70 or 70.2? I have not seen either of these. Only seen the P2 in the cooler tints.

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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.

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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

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I think the FX30 driver (Convoy L6) can be beefed up with a more substantial coil.

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alpg88 wrote:
thijsco19 wrote:
On the picture you can see it still has room between the dies so there might still be a donut hole.. Hope not..

not really the reason, donuts are due to improper focus, i had donuts with xml, and other single die leds. i also have few multi die led lights that have smooth, even beam with no holes or crosses. it is all about the optic,

some optic covers it pretty good, i tried led engin TIR lens, iirc 83mm diameter, i use it with xhp 50, smooth tight beam. splattered maglite reflector removes any imperfections from the beam of P7 led, thou P7’s had different material used for primary optic, some domes are clear, some a bit foggy. iirc xhp xx domes are not crystal clear, that should help a bit with beam profile,

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!!!!

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Jerommel wrote:
I think the FX30 driver (Convoy L6) can be beefed up with a more substantial coil.

What coil? I don’t think I’ve seen one on there.

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JasonWW wrote:
Jerommel wrote:
I think the FX30 driver (Convoy L6) can be beefed up with a more substantial coil.

What coil? I don’t think I’ve seen one on there.

The Inductor, the square thing a ma jig!!!

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KawiBoy1428 wrote:
JasonWW wrote:
Jerommel wrote:
I think the FX30 driver (Convoy L6) can be beefed up with a more substantial coil.

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.

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Tom E
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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.

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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.

Tom E
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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.

 

 

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Tom E wrote:

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.


Yep!
Got both of them yesterday…

S026860 Cree-XHP70_2-P2-1A-White-6000K-LED-Emitter-(1-pc)

S026863 Cree-XHP70_2-P2-3B-Neutral-White-5000K-LED-Emitter-(1-pc)

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Texas_Ace
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Tom E wrote:

Uhh – what am I not understanding about this new LED? Can it be over amped and fried?

The MCPCB is not a SinkPAD, slightly thinner at 1.52 mm, but the traces are wider by far.


 


 

We don’t have a test of the 70.2 to know for sure but we can assume it is at least the same improvement as the 50.2. In which case we can figure it has a Vf of over 1V lower then the old 70.

Seeing as the old 70 could pull 12A a full 1V lower Vf could easily see these 70.2’s pulling upwards of 15-20A+ depending on the cells used. Even if that didn’t pop it you can bet it won’t be making peak lumens up there. I figure it should be around 10A for max lumens, so you want a fair amount of resistance to drop the power that much.

End point is that it running it in DD with low resistance is not a wise idea.

Tom E
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Ahh, ok. Cool KB1428 got some too. Hhmm, Could try it in the MT07 then - that's not DD FET, just little bump over stock.

Heres' that un-labeled MCPCB close-up. You should be able to see the traces:

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Oh yeah, it needs regulation or wimpy batteries!

Well it will take just over 20 amps and live, didn’t turn blue, I don’t know for how long, I didn’t want to push it any farther!!! Big Smile

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instead using thin wires it may be useful to add a resistor to limit the current

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