Footprint wise they are the same as a XHP70, with the same ability to be used in 2 different voltage configurations. Sadly internally they are wired to 3V per string, unlike XHP70 with 6V per string which is nicer imo.
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Oh, for a quad LED setup it totally makes sense. Which LEDs are those? LHP531?
Well spotted! Indeed, LHP531!
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4 of them is crazy, what’s the lumen estimate you’re getting?
Dunno, I think no one measured the 20A buck driver yet? But if it’s really 20A, we should be getting 8K lumens, which is 1K more than the LHP73B if mr Koef is correct (in Koef we trust).
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oh there are a lot of lumens here but i don’t like the black hole in the middle
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That’s what the orange peels are for my good sir!
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Yep, for emitters that are not uniform, I now prefer OP reflectors.
maybe a TIR?
5A drivers (both linear and buck) don’t use PWM to drive the LED, they both include an adjustable current regulator circuit:
- 17mm 3V 5A 12groups linear LED driver for SST40 - Convoy flashlight
- 17mm 3V 5A BUCK driver - Convoy flashlight
They still use some PWM inside the circuit to drive the regulators, though. But I can’t hear any sound from them at all.
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Kaidomain does sell a 12V XHP70 PCB though?
No need to have any manufactured.
This type foes not work in most flashlights though. It shorts out the light.
Someone (I think MTN?) also sold the correct kind, but with very thin traces looping around, my approach was to make the loop with a short wire instead.
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@BlueSwordM The FC40 MCPCB has the same construction as above, with the series junction being the same as the thermal pad.
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Unfortunately an OP reflector won’t fix a donut hole of this severity. Your best bet is heavy diffusion film on the lens.
It holds in general that OP reflectors are worse at diffusion/mixing than diffusion film.
Unless heavily diffused, a TIR won’t do either; plus, one of this size would be heavy.
Ah ok ok. So we’d need someone to actually make a 12V MCPCB for the LHP73B instead.
I just realized the XHP70.X also has that same design, which means there should be a compatible MCPCB somewhere…
If that’s the case, why the crap is Kaidomain selling an “7070 12V compatible” MCPCB if only one LED works with it?!!
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I believe Mtn has it, but for $2.85 and prohibitively high shipping if you are not getting other stuff (or outside US).
I guess the merged thermal pad design technically works as long as the host is designed in such a way that the MCPCB shelf is insulated, and there is no risk of something electrical touching the MCPCB. Still, poor engineering, and I think it would cause issues with FC40 too if used in some hosts. I guess it’s cheaper than manufacturing a PCB that has a series junction that is separate from the thermal pad…
Update: thanks to Simon being awesome as always, I’ve received a replacement 5A T3 driver after a more important component fell off after a drop. It also exhibits flickering on moonlight when used with NiMH, which makes me think it has nothing to do with the missing component, and that I just didn’t notice it before.
The weird thing is, during a mode group change the light goes into brief bursts of low output (between the flashes), and that output is (1) lower than the actual moonlight and (2) perfectly stable.
Has anyone else observed the moonlight flickering on NiMH, on either the old or new T3 driver?
P.S. I’ve conformal-coated the small SMD components with UV resin, to make sure that they will never fall off again.
Ohhhh I didn’t know it had split pads!
Guess I’ll need to order some new MCPCB and another M21B or maybe M21A…
There is any usb-c charged 18350 accu that fit into S2+ with 18350 reduction?
I bought Nitecore 5A 1600mAh and it’s not fit even with trimmed springs. My hood is unscrews maybe is sealed but it loose electricity often 