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

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giorgoskok
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Cool
Jensen567
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Neat. Could the LD-4B be used in theory with 4 separate MOSLED PCBs in something like the Q8, so each emitter has it’s own MOSFET, or would that cause issues on the gate drive? Honestly I’ve never really tested to see how consistent MOSFETs are part to part.

Really liking the new PCBs though, going to have to pick up some 4040 triples and quads at least, likely some others as well to go with the LD-B4HV once it is live. Will there be an LD-A4HV at any point?

led4power
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Mosfets like many semiconductor parts have relatively wide tolerances, so separate mosfets with only one control signal is not best idea,at least in theory (just like parallel LED connection is not recommended), but it may work. Better solution would be one big mosfet (can be on separate PCB if there is enough space) and LEDs in parallel. For example, in Q8 you could use normal copper DTP board(s) for LEDs and have mosfet on its own mcpcb mounted on bottom side of the shelf (glue,screws...), all controlled with one LD-B4(HV).

For Luxeon V triples and quads you can use existing LD-B4,if you have clicky hosts of course. There will be no LD-A4HV because even on single cell, heat management is not easy with most new low Vf LEDs; dissipation in mosfet with most of 6V-12V LEDs is over what mosfet mounted on FR4 pcb could handle.

Jerommel
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Hey, good news you’ll make e-switch drivers again. Thumbs Up

Q

khas
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I had a bit of time to play with the MosX 20mm MCPCB and the LUXEON V emitter.

First I tried it in a EE X6 with a BLF A6 driver, I got 8.56 A draw on turbo but I couldn’t find a centering I thought fitted properly.

I ended up with a Sofirn C8 host and a MTN-17DDm driver giving 9.31 A draw on turbo

I used one of these Convoy centering rings reamed out to fit the emitter

The think the MCPCB’s are great, but it does take a lot more heat to solder the wires. The amp draw is very high so I will be ordering a LD-B4 6Amp driver and a ILC-0 Illuminated tailcap.

TWN
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led4power wrote:

1S-4S, PCB prepared for e-sw support also, but first it will be clicky switch only.


Waiting for these driver, finally… Big SmileCool
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TWN wrote:
led4power wrote:

1S-4S, PCB prepared for e-sw support also, but first it will be clicky switch only.


Waiting for these driver, finally… Big SmileCool

+1

 

led4power
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Maybe next year Smile

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led4power wrote:
Maybe next year Smile

About when next year? Thumbs Up

Neven I’m down to (3) LD-2 M2’s ( one of which is going into one of two BLF GT’s) and (3) LD-2’s I have been saving as back ups, stop torturing us/me! Big Smile

KB1428 “Live Life WOT”

led4power
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Clicky version very soon, e-switch after that.

Megapanda66
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When will you have the Luxeon V on 16mm board back in stock?
Im wanting to build a new EDC light for the coming year with LD-A4, ILC-1, thermal kit for S2+, and Luxeon V. Everything is my cart but the Luxeon

led4power
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ETA on new boards is 3-4 weeks. I have few pieces left - added 2pcs in stock on website,so you can order.

 

doubleone44
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Would it be possible to order the 3XP 4040 board with the luxeons already soldered on it? If so, please PM with information about additional costs etc.
Thanks in advance!

led4power
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Please add board and leds separately,and just leave me a note in order about soldering, no extra fees.

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Mike C
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Yeah, I just saw that… deleted my post but wasn’t fast enough Smile

hannesremo
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So how does this work, for instance if you use a 4-6A driver does that mean that 4-6 is max current? How much current does the other modes have then? What's the lowest it will go to? What's the mode percentages? Would the ld-4 work with xhp50.2/70.2? aswell how about triples in parallel? For example s2+ with triple xp-g3? 

emarkd
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hannesremo wrote:

So how does this work, for instance if you use a 4-6A driver does that mean that 4-6 is max current? How much current does the other modes have then? What’s the lowest it will go to? Would the ld-4 work with xhp50.2/70.2? aswell how about triples in parallel? For example s2+ with triple xp-g3? 

The 4-6 A driver has a high mode that’s configurable over a range from 4 to 6 amps. In the programming, you can set it to be either of those values, or anywhere in between in 250mA steps.

The lower modes are then percentages of that maximum. Lowering the max lowers them all, so they stay visually linear. I’m not sure what the actual output current is for each mode.

The lowest is the “special” moonlight mode, which is independent of the others (in other words does not scale with the maximum) and is instead fixed at either 2.5mA, 5.0mA, or 7.5mA. Or you can turn it off. Its very dim.

The LD4 currently only works with 3v emitters, so no XHP-series stuff. Its great on multi-emitter setups though, as long as its 3v emitters in parallel. I’ve got them on several triples.

led4power
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Well explained emarkd, thanks:)

I will just add that 6V-12V version of LD-B4 will be available soon.

hannesremo
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So if I do a triple xp-g3 and a triple nichia 219 in s2+ what driver would you recommend how much current is good for triple parallel? 

hannesremo
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what percentage do the modes have? How many amps per mode? Depending on max current they change of course but what wouls they be in general?

emarkd
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hannesremo wrote:

what percentage do the modes have? How many amps per mode? Depending on max current they change of course but what wouls they be in general?

The percentages for each mode are all in the datasheet, which is linked from led4power’s website. I’ll link it instead of retyping it all.

https://led4power.com/wp-content/uploads/2017/12/LD-4-datasheet-1.1.pdf

hannesremo
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oh yeah I must read it through thank you! Btw what do you think is suitable max amps for a triple s2+? What would be best ? how far can you push it? I know it gets hot and should only use high amps in short bursts but what do you think?

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9-12Amps total is what most people use for high power builds, driver should be B4 variant in combination with mosled or mosx metal core PCB.

1C3
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Just for information and maybe a suggestion, have you thought about making a triple mosled board for the E21A? These leds seem like a perfect fit for LD-B4, they have a very low Vf, work well with optics, are avaiable in very interesting tints and are best driven at ~2A, which would make for 6A total max current which I find ideal for small triples. I know Clemence is already making some boards but I would prefer the more traditional/well known triple layout and I don’t think I’m the only one, though I don’t really know how much of a market there would be for something like that.

By the way, I’ve been using my triple X6 with LD-A4 and the LD-B4 E2L a lot lately and I’m really enjoying the amount of configuration options and the ease of use of the configuration menu, after memorizing the menu it becomes really easy to customize the driver on the spot depending on my needs.

steel_1024
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+1

Sorry for my poor english.

led4power
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Are those nichias compatible with carclo optics? They are very thin and domeless, I'm not sure they would work well with standard optics.

 

 

1C3
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They are compatible for sure as there are official numbers for cd/lm and efficiency on the carclo website ( example ), and they seem more or less in line with the usual 3.45mm domed leds though efficiency looks a bit worse.

djozz
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led4power wrote:

Are those nichias compatible with carclo optics? They are very thin and domeless, I’m not sure they would work well with standard optics.


 


 


I’d guess that the focus would be a bit off, the optic should be a bit closer to the board. A bit of filing of the legs to extend the narrow bit should solve that but it does complicate the mod.
Apart from that, the attractiveness of such a board is a bit dependent on those nice offerings from Clemence, I hope that he is able to keep getting those nice leds.

That said, a triple E21A board sounds pretty cool to me. Smile

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khas wrote:

I used one of these Convoy centering rings reamed out to fit the emitter

I use those too, but i pushed a square diamond coated file through it, so you have 4 corners filed away.
Perfect fit.

Q

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