Led4power.com : LD-4 CC linear drivers, ILC-0/1 illuminated tailcaps, optics, MOSX, copper DTP MCPCBs...

Thanks everyone for the helpful info.

So in my case, from what I’ve just learned, XHP35 is not a viable option with this driver.

Plenty of people have made hot rod type lights with 4x26350 but if you really want to use XHP35 you may be best served to wait for a good boost driver so you have more battery options. (or go with one of the existing mediocre boost drivers that are out there)

No I meant 4x26500’s, for some reason I thought C’s were the same length as D’s cells just smaller diameter? I have several lights that run 3 cells (18650/32650) and now they run 4x26500’s and 4x18500 with the XHP35HI/HD’s in them, that’s why I stated possibly I wasn’t too sure of it. :slight_smile:

I understand it would work, but I don’t think I’d be happy dealing with 4 cells for only 2000mAh.
But maybe xhp35 is more efficient to run than xhp50.2? Or does the drivers output current rating determine efficiency?

Not sure I’d consider this a “Hot Rod” by today’s standards, but I suppose it could be.

I could get the MTN-MAXlp HP, but this LD-x4(HV) seems to have much more going for it, almost like a “Dream Driver” ?

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Sorry if it’s been mentioned already but does the mosfet create additional heat at the mcpcb?

Ok I see, thanks, ya D cell is about 61mm so about 11mm taller than C.

So now I am back to the original plan of using XHP50.2

I need to decide on which current range to get.

Output current - (wattage)

  • 2-3A (12-18W)
  • 4-6A (24-36W)
  • 7-9A (42-54W)

Are these estimates correct for wattage at the LED? (assuming 8.4v input will reduce to 6v output)

Also I assume the cells must be capable of supplying even higher input currents to enable these output currents?

Cree specs show 3A/18W Max. (I know it can be overdriven though)

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I’m leaning towards 4-6A, any suggestions?

Considerations:

  • Higher wattage = increase lumen output = more heat
  • 1. Body is full sized, tube/neck is very thick (about 5mm) Head is thinner, and no cooling fins.
  • 2. Unsure of power handling capability for the switch.
  • 3. 50W @ LED could melt the TIR optic?

Also, how to run the 3 additional leads through the pill (16mm mcpcb space)

I assume I’d simply enlarge the existing holes? It looks like the mcpcb’s cutouts are wider than usual for this:

Just noticed there doesn’t appear to be a pad for the mosfet on the 16mm mcpcb?

Also just noticed that’s a 4040, and there dosen’t appear to be a 16mm 5050.

I would say go with 3Amp driver and XHP50.2, that light has no cooling fins and questionable switch current capability, everything above 3Amps would be too much for this host.

Thanks, that’s what I was thinking so the light could more usable.

I would compare the light to a Maglite, which I’ve seen modded with 3x xhp50 / 5000lm
https://asflashlights.com/led-upgrades-for-maglite/84-5000-lumen-2-d-size-maglite-choice-of-color.html

But I also see it gets real hot, 225 degrees in 15min. What you got today - #9595 by Terry_Oregon

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Also there’s no 5050 16mm mcpcb with pads to mount the mosfet, so LD-B4HV can be used only with 20mm mcpcb, correct?

Yes, LD-B4(HV) can be used with 20mm boards, on 16mm there is not enough space for anything other than LED.

Output test for OSRAM SFH 4715AS on CU MCPCB vs. mosX: https://budgetlightforum.com/t/-/51198

When can we expect to start seeing these LEDs?

Probably in the next 4-12 months, they are not in production yet.

BLF Q8 4040/5050 copper DTP boards arrived:

I will send two to djozz to check if everything is ok.

Also, 20mm copper DTP 3535 board(70um copper,gold plated top,nickel plated bottom):

Price is: 1,17€/pc , I will list it on web tomorrow (contact for larger quantity discounts).

I can check the Q8 boards but I assume they are ok, they look good. I will check the Q8 board with Luxeon V’s, but I have only two left, could you send 2 Luxeon V leds with the boards? (I will pay for them).

I do not own SST40 leds but I can check the 5050 pads with XM-L2 leds if that is ok with you, for checking the function of the board that should be sufficient. If not I can order some SST40 leds but that will take a while.

exciting

Wow, that’s fast. I expected it that it would be a while before you had the Q8 boards ready. How soon can we expect the triple 4040 32mm boards?

@djozz

I already packed 2 boards and 4 L1V1s. 5050 checking is not necessary, if 4040 are good, 5050 will be too.

~3-4weeks,and not just triples.

That’s some fast turnaround time. I guess I’ll be making another order in a month or so.