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

led4power · 2021-07-25T08:54:09.000Z

MZs are out of stock and discontinued, listing was on page for a long time.

uselessuser · 2021-10-02T19:51:38.000Z

I’m having lots of trouble reflowing Osram CULPMs to the aluminum 4x4040 boards on led4power.com. No matter how careful I am, I always end up with current leaking from + to the bottom of the PCB and the LEDs won’t light up.

I don’t think there is anything wrong with my technique, it’s worked well for over 50 LEDs so far. Leaded solder, not too much, plenty of flux, controlled heat, etc. I feel like there’s something about the board that doesn’t play nice with the LEDs, so could someone confirm that the LEDs and the board are indeed compatible?

Scallywag · 2021-10-02T19:50:45.000Z

CULPM1 is indeed 4040 footprint. Should work

djozz · 2021-10-02T20:22:09.000Z

I’m not sure what is going on with this particular board, but when I have shorts after reflow, I re-heat the board and one by one slide leds off sideways with fine tweezers and then slide them in postion again. That helps removing solder bridges.

Edit: if this is a MosX board it is more surprising even: none of the solder pads should be connected to the core, even not the thermal pads. In that case you may have a defective board where somewhere the +pads are connected to the core. Can you see any dents that could have caused that?

uselessuser · 2021-10-04T13:50:05.000Z

djozz:

I’m not sure what is going on with this particular board, but when I have shorts after reflow, I re-heat the board and one by one slide leds off sideways with fine tweezers and then slide them in postion again. That helps removing solder bridges.

I’ve done that, no luck.

djozz:

Edit: if this is a MosX board it is more surprising even: none of the solder pads should be connected to the core, even not the thermal pads. In that case you may have a defective board where somewhere the +pads are connected to the core. Can you see any dents that could have caused that?

They aren’t, they are connected to the + pad. This whole undertaking has been an exercise in frustration, I have no idea why the LEDs don’t work. Looking at it through a magnifying glass I get the impression that the pads for the LEDs don’t align well with the LEDs themselves at all but I don’t have a short between the + and - pad so that’s probably not it either. The website says the boards can be used without the MOSFET but recommends shorting the footprint in that case, but that just creates a short between + and - so I’m not sure what’s up with that.
By now I’ve probably reflowed some of the LEDs 10 or 15 times. These aren’t even reliable anymore. I think I’ll just abandon the project.

Has anyone successfully used one of the 4x4040 mosX boards?

MascaratumB · 2021-10-04T14:14:08.000Z

Im not sure if this helps but I guess I used on in my OL contest build in 2019.
Check the photos here:

MascaratumB’s entry – Old Lumens Contest 2019 - Modified Light Category [FINISHED on 8th February 2020] Giveaways and Contests

Well, yesterday another thing arrived: the Luxeon V 4000K 70CRI on a quad mosX from led4power!! And I put my hands at work I mounted soldered the driver wires to MCPCB. Here’s how it looks before soldering. Please note that with everything on the right place in with the mosX MCPCB, the gap when the bezel is screwed is smaller, although it still exists. However, I will not file the pill more than I already did. [image] [image] The soldering process was a bit hard, I guess I need a new…

I am not sure if I have more with details, but I will check my G. Photos!

EDIT:

uselessuser · 2021-10-04T14:59:20.000Z

Thanks! Yeah, I definitely was unable to get t anything to light up in that configuration.

Scallywag · 2021-10-04T15:06:56.000Z

uselessuser:

djozz:

I’m not sure what is going on with this particular board, but when I have shorts after reflow, I re-heat the board and one by one slide leds off sideways with fine tweezers and then slide them in postion again. That helps removing solder bridges.

I’ve done that, no luck.

djozz:

Edit: if this is a MosX board it is more surprising even: none of the solder pads should be connected to the core, even not the thermal pads. In that case you may have a defective board where somewhere the +pads are connected to the core. Can you see any dents that could have caused that?

They aren’t, they are connected to the + pad. This whole undertaking has been an exercise in frustration, I have no idea why the LEDs don’t work. Looking at it through a magnifying glass I get the impression that the pads for the LEDs don’t align well with the LEDs themselves at all but I don’t have a short between the + and - pad so that’s probably not it either. The website says the boards can be used without the MOSFET but recommends shorting the footprint in that case, but that just creates a short between + and - so I’m not sure what’s up with that.
By now I’ve probably reflowed some of the LEDs 10 or 15 times. These aren’t even reliable anymore. I think I’ll just abandon the project.

Has anyone successfully used one of the 4x4040 mosX boards?

I have one in use. I had to solder LED+ to the pad that the mosfet would be on, iirc.

led4power · 2021-12-18T17:33:28.000Z

Important note to customers:

there is a final extra 10% discount for everything in store (code L4P2021) and it's valid until 29.12.2021.

Currently all items in store are bought and sold over my first smaller company, which I will close on 31.12.2021., and switch my business to 2nd LTD company (which I've used for lager customers and some other work).

Because I cannot mix parts bought over 1st company with stock of 2nd company, everything you see in store except for Osram LEDs is available only until 29.12.2021.

This includes LD-x4 drivers too - so they'll have obsolete/end of life status. I will not make and sell them over my LTD company, maybe if some larger buyer still needs them, 100+pcs will be min. order, but this is also questionable and depends on chips availability.

That also means there will be a gap regarding drivers availability until new driver generation is ready (and that depends a lot on chips availability, which is terrible currently).

So After New Year things that will be available are new 3030,3535,4040 16 and 20mm DTP PCBs (refreshed design), Osram CSLNM1.TG, CSLPM1.TG and CULNM1.TG, and limited qty of Luminus SFT-40.

Over time I'll add some more items in stock.

Good news is that bare LEDs will be available too, and every item will have better, more aggressive price breaks for larger quantity.

Shipping to UK without 135GBP min. order should be available too.

Orders made until 29.12.2021 which contain driver may be shipped with some delay, because I don't have lot of parts for drivers left, so it will take some time (5-7 days) until parts arrive.

Thank you for your support and I wish you happy Holidays and better New Year!

DarkShot · 2021-12-21T18:28:21.000Z

Do you have any remaining 4xV MCPCBs?

I’d like to build a quad Luxeon MZ but see that the 4 emitter + MCPCB combination is out of stock.

led4power · 2021-12-22T08:14:45.000Z

https://led4power.com/product/mosled-extreme-mosx-ceramic-insulation-4xv-4040-quad-mcpcb-20mm/

MZ LEDs are sold out.

id30209 · 2021-12-22T09:20:32.000Z

Coming home soon and going to check what i still need before the end of the year.

MascaratumB · 2021-12-23T14:04:11.000Z

led4power:

Important note to customers:

there is a final extra 10% discount for everything in store (code L4P2021) and it’s valid until 29.12.2021.

Currently all items in store are bought and sold over my first smaller company, which I will close on 31.12.2021., and switch my business to 2nd LTD company (which I’ve used for lager customers and some other work).

Because I cannot mix parts bought over 1st company with stock of 2nd company, everything you see in store except for Osram LEDs is available only until 29.12.2021.

This includes LD-x4 drivers too - so they’ll have obsolete/end of life status. I will not make and sell them over my LTD company, maybe if some larger buyer still needs them, 100+pcs will be min. order, but this is also questionable and depends on chips availability.

That also means there will be a gap regarding drivers availability until new driver generation is ready (and that depends a lot on chips availability, which is terrible currently).

So After New Year things that will be available are new 3030,3535,4040 16 and 20mm DTP PCBs (refreshed design), Osram CSLNM1.TG, CSLPM1.TG and CULNM1.TG, and limited qty of Luminus SFT-40.

Over time I’ll add some more items in stock.

Good news is that bare LEDs will be available too, and every item will have better, more aggressive price breaks for larger quantity.

Shipping to UK without 135GBP min. order should be available too.

Orders made until 29.12.2021 which contain driver may be shipped with some delay, because I don’t have lot of parts for drivers left, so it will take some time (5-7 days) until parts arrive.

Thank you for your support and I wish you happy Holidays and better New Year!

Order placed

I’ll be looking for some goodies to start the year with some mods

Thanks for the coupon and the materials and I wish you luck in advance for the “new” store I hope we can still buy from it as small customers :innocent: :partying_face:

JaredM · 2021-12-23T17:11:08.000Z

Would it be too much to ask if I suggested that all the out of stock products be removed? Or maybe anything still in stock consolidated into a new category?

Correllux · 2021-12-24T19:15:54.000Z

led4power:

Thank you for your support and I wish you happy Holidays and better New Year!

Happy holidays and a happy New Year to you, Neven!

I don’t need any drivers at the moment but I sure hope you will bring them back sometime in the new company…very much enjoy the ones I have from you! Wish you much success with the new company also and hopefully it will prevent the past headaches with bureaucracy.

led4power · 2021-12-25T08:19:51.000Z

JaredM:

Would it be too much to ask if I suggested that all the out of stock products be removed? Or maybe anything still in stock consolidated into a new category?

Since this final sale will last for just few more days, I'll leave it as is.

luminarium_iaculator · 2021-12-26T21:38:34.000Z

Correllux:

led4power:

Thank you for your support and I wish you happy Holidays and better New Year!

Happy holidays and a happy New Year to you, Neven!

I don’t need any drivers at the moment but I sure hope you will bring them back sometime in the new company…very much enjoy the ones I have from you! Wish you much success with the new company also and hopefully it will prevent the past headaches with bureaucracy.

+1 :+1:

I also enjoy your drivers. They are the best and I could easily say they are the beast

led4power · 2021-12-30T09:01:15.000Z

Note: shop will be closed in about 12 hours.

1stein · 2021-12-30T09:05:21.000Z

Thanks for the info. So you have an idea when drivers availability may be brought back?
I just don’t know how much reserve should I make…

led4power · 2021-12-30T10:06:11.000Z

As I said previously, I will not make LD-4 anymore (maybe if there is custom order with larger qty - maybe).