MTN Electronics: LEDs - Batteries - Lights - Chargers - Hosts - Drivers - Components - 1-Stop-US Source

[JasonWW]

@Yourrid

Question for you guys:

I currently have a C8 with a XHP50.2 and a RMM FET with 2 18350’s in it. What do you suppose one of these new boost drivers would do to the output of a XHP50.2 when changing over from 18350’s to a single, high drain 18650 (30Q/VCT5) and one of these drivers?

(Obviously these aren’t out yet, so no one knows exact specs. It’s all conjecture at this point)

How have you not burned out the 50.2 yet? Those leds don’t like FET drivers. Are you running very low drain 18350’s?

[KawiBoy1428]

@JasonWW

@Yourrid

Question for you guys:

I currently have a C8 with a XHP50.2 and a RMM FET with 2 18350’s in it. What do you suppose one of these new boost drivers would do to the output of a XHP50.2 when changing over from 18350’s to a single, high drain 18650 (30Q/VCT5) and one of these drivers?

(Obviously these aren’t out yet, so no one knows exact specs. It’s all conjecture at this point)

How have you not burned out the 50.2 yet? Those leds don’t like FET drivers. Are you running very low drain 18350’s?

FM

[eas]

@EasyB

These boost drivers will be a hit, assuming they work well. These will offer multi-emitter performance without the work of making a spacer and finding suitable reflectors. I plan to put a sliced XHP70.2 or XHP50.2 in an emisar D1S.

They are also useful for running triples and quads in series configs. Particularly if one wants to mix emitters with different forward voltages.

[Yourrid]

@JasonWW

@Yourrid

Question for you guys:

I currently have a C8 with a XHP50.2 and a RMM FET with 2 18350’s in it. What do you suppose one of these new boost drivers would do to the output of a XHP50.2 when changing over from 18350’s to a single, high drain 18650 (30Q/VCT5) and one of these drivers?

(Obviously these aren’t out yet, so no one knows exact specs. It’s all conjecture at this point)

How have you not burned out the 50.2 yet? Those leds don’t like FET drivers. Are you running very low drain 18350’s?

• 2 Efest 18350’s (Purple 2017?)
• Let the batteries rest a good while after charging (don’t just pop them in)
• RMM FET with bypassed driver spring, stock spring on the tailcap
• 20ga leads
• Pure luck

I got the clear anodizing C8… its a fun and good looking light!

BlueSword - thanks for the detailed explanation! I may have to get in on your spring group buy!

[Yourrid]

Well I guess I jinxed myself. I was using the above C8 tonight, since we were talking about it… all of a sudden it decided it only wants to use moonlight mode for all levels of intensity. Low is like 1 lumen, medium 10 lumens, high 50 lumens.

Looking at the led on low, one of the arrays is brighter than the other 3. Did I finally blow the emitter?

[vinte77]

So I just checked mountain’s website and I see an out of stock listing for a 17mm boost driver!

[JasonWW]

@vinte77

So I just checked mountain’s website and I see an out of stock listing for a 17mm boost driver!

What, no link? Lol

17mm boost driver

This boost driver (input voltage is lower than output voltage) can drive 6V LEDs, such as the XHP50.2/70.2 from a single rechargeable lithium-ion battery at an output current of up to 4.2A. It can also drive a 12V LED, such as the XHP35, at up to around 1.3A. The MTN-BST2 uses a highly efficient synchronous boost converter squeezed into a tiny 17mm form factor.

Unlike most of the high power boost drivers out there, this driver can achieve a wide dimming range and utilize popular firmwares.

This driver takes up to 10 business days to be built, tested, and shipped. Your order will not ship until the driver is completed.

Battery & Host Requirements:

In stock form, this driver will pull just over 10A peak current, therefore a 10A+ continuous rated battery is required (unless you reduce the input current limit). The more voltage the battery can hold under load, the better the driver will perform. Your switch, springs, etc. must be able to handle the 10A+ input current; this means that you must have high performance or bypassed springs in your light.

The driver _must_ be soldered into the pill or held firmly in place with a retaining ring. This is required both for adequate thermal and electrical performance. If during use the light turns off and on, the driver is overheating and needs to be switched to a lower mode or turned off and allowed to cool. Continued operation at excessively high temperature will damage the driver (damage from excessive temperature will not be covered under warranty).

Specifications:

Boost Converter (input voltage must be lower than output voltage)
3V - 5.5V input voltage range (suitable for a single lithium-ion battery)
Designed to drive 6V LEDs, such as the XHP50.2 and XHP70.2 at drive currents up to 4.5A
Can also drive 12V LEDs, such as the XHP35 at currents up to around 1.3A
Output voltage range: ~6V —- ~13.8V
Output current range: 6V LED: 1A —- 4.2A
XHP50 / 50.2
XHP70 / 70.2
MT-G2 6V

12V LED: ~1.3A
XHP35 HD / HI

Input Current Limit Option:

If you are running any battery that is not capable of 10A+ continuous discharge current, you must change the input current limit to a lower value.

~10.5A | 4.2A w/ 6V LED maximum recommended output current
~8A | 3.5A w/ 6V LED maximum recommended output currnet
~4A | 2A w/ 6V LED maximum recommended output current

Output Current Option:

The output current is set using one or two sense resistors. You can choose between any of the following output current limit options:

1A
2A
2.5A
3A
3.5A
4.2A

Firmware Options:

Currently only guppy3drv is available. We will have Bistro available as soon as we get it 100% dialed in.

1. guppy3drv (click for more information).

2. Bistro

[contactcr]

I’m hoping the 20-22mm versions will have a bit higher 12v output and support both 1s/2s but either way ill still buy one of the 17mm’s as is I think.

[JasonWW]

@contactcr

I’m hoping the 20-22mm versions will have a bit higher 12v output and support both 1s/2s but either way ill still buy one of the 17mm’s as is I think.

Yes, I’m surprised the 12v is not a bit closer to half the 6v output.

We know that a bigger size driver can do 12v up to about 3A, but I’m not sure if Richards will go that high. He may dial it back a little to get better reliability.

This is just the beginning. More is to come.

[Yourrid]

Richard is about to be flooded with boost driver orders once he lists them in stock

Is there a reference you guys use to determine the proper output for XHP and MT-G2 LED’s. I mean, is there a good output to heat chart for each that shows how many amps it would take to blow an emitter?

I don’t want to be selecting 4.2 amps for a XHP50.2 when it can’t handle it. While I wouldn’t want 1A if it can really handle 4.0A either.

[contactcr]

@Yourrid

Richard is about to be flooded with boost driver orders once he lists them in stock

Is there a reference you guys use to determine the proper output for XHP and MT-G2 LED’s. I mean, is there a good output to heat chart for each that shows how many amps it would take to blow an emitter?

I don’t want to be selecting 4.2 amps for a XHP50.2 when it can’t handle it. While I wouldn’t want 1A if it can really handle 4.0A either.

Check out these examples and look in each of their signatures. I like each member for different information so you should decide for yourself but they basically all test LEDs till they are almost or completely dead.

djozz

Testing a Cree XHP50.2 J4 3A led

[image] [image] A new generation of XHP50 from Cree, they called it XHP50.2 . The appearance of the led is in line with several other recently updated Cree leds, with rougher phosfor layer that is applied differently. Let's test it. I bought two XHP50.2 leds from Kaidomain, of which the J4 3A bin is tested here, so a neutral 5000K tint. The J4 output bin is the highest bin in the datasheet, both for XHP50 and XHP50.2, but at this moment Cutter sells XHP50.2 leds in K2 bin (as often hap…

koef

LED test / review - Cree XLamp XHP70.2 P2 40E (4000 K) - The second generation of extreme overcurrent and light flux capability?

LED test / review EN Cree XLamp XHP70.2 P2 40E, XHP70B-01-0000-0D0BP240E UPDATE --- 06/24/18 --- raw data added! (link) [image] Originally, this (my) test was posted in the English forum of the German Taschenlampen-Forum (TLF). To give you the oppertunity to discuss about this emitter in this forum, I will also publish this test here. I hope this report is helpful for all of those who want to build some lights with this really big LED. The XHP70.2 be…

Texas_Ace

XP-L HI 1A V2 LED Output test by Texas_Ace, Well, you have seen the HD, this is the HI. It is exactly what you expect.

See the title, it is another test. do I really need to explain this everytime? I abuse an LED and see what it does, same as all the rest of my victims subjects. Thanks to CRX for donation. Well, you have seen the XP-L HD test, so here is the HI. It tracks exactly the same as expected, just less output from the lower bin. I could have kept pushing it harder but I saw no reason to blow it. The numbers could be a tad low in the high end as my heatsink fan is messed up and I had to rig something …

[JasonWW]

@Yourrid

Richard is about to be flooded with boost driver orders once he lists them in stock

Is there a reference you guys use to determine the proper output for XHP and MT-G2 LED’s. I mean, is there a good output to heat chart for each that shows how many amps it would take to blow an emitter?

I don’t want to be selecting 4.2 amps for a XHP50.2 when it can’t handle it. While I wouldn’t want 1A if it can really handle 4.0A either.

It’s best to just Google the emitter name and specs. Switch to images and look for charts. I keep a whole folder full of these charts.

For a 6v 50.2 and MT-G2, 4.2A is fine for both.

[DB_Custom (Dale)]

Just so’s ya know, Richard has tested this boost driver of his to death. That’s the way he does things, he won’t release it until he’s very confident it will work reliably. And he’s at that point now. So while we’re just now seeing these he’s been torture testing for quite some time and tweaking to ensure they hold up.

I’ve talked to him about these quite a lot and of course am as eager as anyone to get an order placed. I’m told “Soon”, and I believe they’ll be worth it.

[DavidEF]

@DB Custom

Just so’s ya know, Richard has tested this boost driver of his to death. That’s the way he does things, he won’t release it until he’s very confident it will work reliably. And he’s at that point now. So while we’re just now seeing these he’s been torture testing for quite some time and tweaking to ensure they hold up.

I’ve talked to him about these quite a lot and of course am as eager as anyone to get an order placed. I’m told “Soon”, and I believe they’ll be worth it.

[moderator007]

I just ordered one.
23 more available.

[EasyB]

The 17mm boost driver looks good, but I’m hoping the larger ones will have more power. I’m at a point in my flashaholism that I’m not satisfied with a reasonable amount of power. I need an impractical amount of power.

[JasonWW]

Here’s some pictures. Hmmm, no Atiny85.

[JasonWW]

@EasyB

The 17mm boost driver looks good, but I’m hoping the larger ones will have more power. I’m at a point in my flashaholism that I’m not satisfied with a reasonable amount of power. I need an impractical amount of power.

There’s not a big difference between 4.2A and 6A. So if you wanted a 70.2 in an S2+, 4.2A is still great. You’ll get much longer run time compared to using 2 x 18350.

Maybe you mean the 12v output? That I can understand.

Personally, I’m still waiting for the e-switch versions with ramping.

[vinte77]

I just ordered a boost driver for my S2+ copper edition… I’m planning on using a xhp50 90 cri led that i have on hand for now for the build.

[contactcr]

@vinte77

I just ordered a boost driver for my S2+ copper edition… I’m planning on using a xhp50 90 cri led that i have on hand for now for the build.

Be sure to post your beam shots and stuff with that LED. I ordered a 50.2 80CRI 4K one to try in a miniC8 OP reflector