Virence VS35SP36 MCPCB - cost effective (High CRI) General Lighting solution

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clemence
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Virence VS35SP36 MCPCB - cost effective (High CRI) General Lighting solution

Coming SOON!

Application example (simulated)

Nichia NF2W757GR-V3 R70 (6V)

Condition: 350mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 1000 lm
Efficacy = 191 lm/watt
Wattage = 5,5 watt

Condition: 700mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 2000 lm
Efficacy = 179 lm/watt
Wattage = 11,4 watt

Condition: 1400mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 3900 lm
Efficacy = 160 lm/watt
Wattage = 24,4 watt

Condition: 2800mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 7100 lm
Efficacy = 133 lm/watt
Wattage = 53,9 watt

——————————
Nichia NF2W757GR-V3 R8000 (6V)

Condition: 350mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 940 lm
Efficacy = 172 lm/watt
Wattage = 5,5 watt

Condition: 700mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 1800 lm
Efficacy = 162 lm/watt
Wattage = 11,4 watt

Condition: 1400mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 3500 lm
Efficacy = 145 lm/watt
Wattage = 24,4 watt

Condition: 2800mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 6570 lm
Efficacy = 122 lm/watt
Wattage = 53,9 watt

——————————
Nichia NF2W757GR-V3 R95 (6V)

Condition: 350mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 720 lm
Efficacy = 135 lm/watt
Wattage = 5,3 watt

Condition: 700mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 1400 lm
Efficacy = 125 lm/watt
Wattage = 11,2 watt

Condition: 1400mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 2670 lm
Efficacy = 110 lm/watt
Wattage = 24,3 watt

Condition: 2800mA, CC driver, 3S12P (18V), 85°C Tsp
Output = 4800 lm
Efficacy = 89 lm/watt
Wattage = 54,5 watt
————————————————-

Nichia NF2W757-F1/Optisolis (3V)

Condition: 350mA, CC driver, 3S12P (9V), 85°C Tsp
Output = 340 lm
Efficacy = 127 lm/watt
Wattage = 2,7 watt

Condition: 700mA, CC driver, 3S12P (9V), 85°C Tsp
Output = 680 lm
Efficacy = 122 lm/watt
Wattage = 5,6 watt

Condition: 1400mA, CC driver, 3S12P (9V), 85°C Tsp
Output = 1300 lm
Efficacy = 113 lm/watt
Wattage = 11,6 watt

Condition: 2400mA, CC driver, 3S12P (9V), 85°C Tsp
Output = 2100 lm
Efficacy = 103 lm/watt
Wattage = 21 watt

—————————————————-

UPDATE 190617:
5700K (18x sm503 rfc00 & 18x sm653 rfa00) Optisolis module (9v configuration) prepared for testing in Finland

—————————————————-

UPDATE 190628: Maukka’s preliminary test result with Optisolis
http://budgetlightforum.com/comment/1522199#comment-1522199

—————————————————-
UPDATE 190707: Soldering Tips

You can solder this MCPCB with almost any common solder paste, as long as it contains active flux (no expired). HASL surface finish makes solder wet readily on it. Sn63Pb37 or Sn96,5Ag3Cu0,5 works best.

The correct and easiest method to apply solder paste is to use solder paste stencil. Although you can get away with solder wires, it’s a mess to work with and dosing would not be accurate (larger pads will hold more solder). I have found the best stecil dimension for my application using laser cut 0,15mm thick polyimide sheet. You can download the DXF file here.

Adjust the aperture size according to your preferred stencil thickness. Thicker stencil requires smaller aperture area. Never use the “tapping” method to solder Nichia 757 on this MCPCB. It’s a bad practice and should never be used anyway. Tapping will only make the excess solder balls to short circuit neighboring LEDs. Almost all 757 Nichias have exposed contact points at their four sides, solder balls will cling to it.

—————————————-

UPDATE 190729: Test Result
http://budgetlightforum.com/node/68213

—————————————-

.

[Clemence]

Edited by: clemence on 07/28/2019 - 17:05
Lexel
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what about tint mixing on this board with separate LED pads for 2 colors
like one column cw one WW and separate pads for both colors?

Bridgelux or different COBs can do the same like this multi emitter board

clemence
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Lexel wrote:
what about tint mixing on this board with separate LED pads for 2 colors like one column cw one WW and separate pads for both colors?

You can tint mix freely in any places with almost all 757 family except Optisolis. Mixing between CW/WW Optisolis can only be done between series strings.

[Clemence]

Lexel
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clemence wrote:
Lexel wrote:
what about tint mixing on this board with separate LED pads for 2 colors like one column cw one WW and separate pads for both colors?

You can tint mix freely in any places with almost all 757 family except Optisolis. Mixing between CW/WW Optisolis can only be done between series strings.

[Clemence]

I am talking of indipendant LED positive pads for each tint

clemence
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Lexel wrote:
clemence wrote:
Lexel wrote:
what about tint mixing on this board with separate LED pads for 2 colors like one column cw one WW and separate pads for both colors?

You can tint mix freely in any places with almost all 757 family except Optisolis. Mixing between CW/WW Optisolis can only be done between series strings.

[Clemence]

I am talking of indipendant LED positive pads for each tint

Not with this one. This MCPCB designed mainly for cost saving, voltage/LED choice flexibility, and easy application.

[Clemence]

gchart
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Very cool! Now I just need to think of where I’d want to put one (or more… and what to mount it to for cooling and how to best drive it)

SKV89
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Really want to buy a light bulb made with this. LOL

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This is pretty cool! Any ideas on how this can be used in a portable setup?

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Is there any suitable сooler and optics for this dimension?at ali or other shops?

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Pavlo wrote:
This is pretty cool! Any ideas on how this can be used in a portable setup?

Without modification, this would need a 46.6mm diameter cavity in a flashlight to accommodate the board. Obviously, this would be a mule/full-flood setup as any functional optics would have to be massive.

I can imagine a Maglite mod with an Optisolis board is in my future.. maybe even a soda can mod would be cool. I’ve been waiting for a solution like this Thumbs Up

clemence
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AEDe wrote:
Is there any suitable сooler and optics for this dimension?at ali or other shops?

I use simple back frosted 10mm thick square acrylic glued to it

Pavlo wrote:
This is pretty cool! Any ideas on how this can be used in a portable setup?

Use buck driver with 36P or boost driver with 3S12P setup. You don’t need powerful driver with Optisolis, 65mA – 200mA per LED is all it needs

[Clemence]

clemence
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When I said “cost effective” I really meant it. With 5steps R70 or R8000 GR-V3 you can get the MCPCB + 36pcs LEDs for as low as $5 ($7,15 for GR-V3 R95). R95 rank is already very close to Optisolis, especially at warm CCT.
GR-V3 R95 ranked above E21A and below Optisolis. With Optisolis the board will cost $16,24 – $22,4 (MCPCB + 36pcs LED), CCT dependent. Add + $5 per board if you want me to solder them all. But seriously, soldering 757 LED family is very easy unlike E17A or E21A.
You can save your money by using Optisolis only in certain areas. The cost/CRI point is still too high. I held back from trying the new Optisolis COB because it’s very expensive, and as per now, only comes in limited CCT (AFAIK, 3000K/5000K) and 36V only.

CRI comparison:

.
[Clemence]

djozz
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Cool board! Contemplating an Optisolis flooder now Smile

malkoffdevices
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would this be as in a flashlight you mean too?.

djozz wrote:
Cool board! Contemplating an Optisolis flooder now Smile

London !

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optosolis wrote:
would this be as in a flashlight you mean too?.

djozz wrote:
Cool board! Contemplating an Optisolis flooder now Smile

Yes, a flooder like the Amutorch AT40 (but that one will be just a bit too small)
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The format is not very convenient for me but a dense linear module that I could use instead of a flexible strip would be useful. Smile

SKV89
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Would it work in a sofirn sp36?

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R95 in 3000K looks like a great value indeed!

I’d be curious to see a tint mixed R95+Optisolis in the low CCTs. There’s a small chance they may compliment one another in the blue/cyan region.

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It appears there might be a slim possibility to adapt to automotive 12v applications… it seems not designed for 3v emitters in series…am i wrong?

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Oh my… Facepalm

Due to the orientation of the image of the MCPCB, I was reading those pad labels as “d” and “d/s”. I thought there was some cruel calculus joke going on (thinking d/dx). Nope… Those are probably “p” and “p/s” for parallel/series, huh?

clemence
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The boards are still in the making, delivery schedule is 190515. Crash test will follow later. I still have no idea what is the maximum wattage this board can handle. Nothing fancy here, just normal good quality MCPCB.

I’m getting to like mid power LED these days. Spent few weeks designing the boards and browsing through hundreds of pages of data sheets for a project (that led to this VS35SP36). And as I dug deeper, I like the idea even more. I know the idea of high efficiency lighting is not widely appreciated in BLF but here’s my thoughts to share.

The beauty of mid power LEDs are: low power – low cost – high efficiency – power in numbers. Of course you can get the same output from a single XHP70.2 pushed very hard, but there’s no way you can get the efficiency (wattage/output, cost/module) of multiple mid power LED. I don’t see any benefit for manufacturers to use high power LED in general lighting unless smaller form factor is to be desired. Especially driven at below to max OEM rated current for reliable and predictable L70 life. This explains why more than 80% of Nichia’s LED sales come from low to mid power LEDs. I believe the same also applies to Cree and other manufacturers.
With high power LED, you can get slightly higher efficiency than mid power LED if they’re driven at the same low current. But what’s the point? At whooping 10x – 20x the cost? Development in high power LED is very similar to F1 racing. While mid power LED development is closer to 24 hours Le Mans racing. The latter has more real world applications. It would takes years before F1 technology applied to your public bus transport.
High power LED development from version 1 to version x doesn’t attract manufacturers to get the newest LED. For example the move from 319A to 319B, or XHP70 to XHP70.2 only gain marginal efficiency (within OEM spec), too small to think about for most luminaire manufacturers. Perhaps the most significant gain is the beam quality, not the efficiency. On the other hand, flashlighting is very similar to premium super car world. Anything faster or better, even those with decimal point advantages are still the better choice.

319B vs GR-V3 (both R70), 3000K, Target OTF output = 3500lm:

Nichia NF2W757GR-V3 R70 (6V)
Condition: 1400mA (116,67mA/LED), CC driver, 3S12P
Output = 3959 lm
Efficacy = 162 lm/watt
Wattage = 24,4 watt
LED# = 36pcs
LED cost* = $4,3
*$0,1176/pc @</=10.000pcs MOQ

Nichia NVSW319BT R70 (3V)
Condition: 1400mA (116,67mA/LED), CC driver, 3S12P
Output = 3914 lm
Efficacy = 179 lm/watt
Wattage = 21,5 watt
LED# = 73pcs
LED cost* = $59,86
*$0,82/pc @</=3500pcs MOQ

To get reasonable cost, we have to change existing driver to match 319B performance. To get at least the same efficacy as GR-V3, thus:
Nichia NVSW319BT R70 (3V)
Condition: 5760mA (480mA/LED), CC driver, 3S12P
Output = 4017 lm
Efficacy = 162 lm/watt
Wattage = 24,8 watt
LED# = 19pcs
LED cost* = $15,58
*$0,82/pc @</=3500pcs MOQ

See? There’s no way high power LED will win over mid power LED in terms of cost or efficacy. And FYI, almost all higher current LED driver are more pricey than their lower current output counterparts.
With such low current and power density, GR-V3 can use any good cheap laminated MCPCB reliably. While 319B with its higher power density is about to enter the DTP zone or at least very good laminated MCPCB
.
[Clemence]

clemence
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Agro wrote:
The format is not very convenient for me but a dense linear module that I could use instead of a flexible strip would be useful. Smile

Can’t please everybody all at once. But don’t worry, I already made a design for linear 150mm x 15mm 757 MCPCB waiting to send to the factory.

SKV89 wrote:
Would it work in a sofirn sp36?

I have no idea what this is

JaredM wrote:
R95 in 3000K looks like a great value indeed!
I’d be curious to see a tint mixed R95+Optisolis in the low CCTs. There’s a small chance they may compliment one another in the blue/cyan region.

Don’t forget Optisolis higher Vf, can only be mixed in the series string

NWoodsman wrote:
It appears there might be a slim possibility to adapt to automotive 12v applications… it seems not designed for 3v emitters in series…am i wrong?

It can be configured to 3V or 9V with 3V LED. 6V or 18V with 6V LED, 12V or 36V with 12V LED

gchart wrote:
Oh my… Facepalm
Due to the orientation of the image of the MCPCB, I was reading those pad labels as “d” and “d/s”. I thought there was some cruel calculus joke going on (thinking d/dx). Nope… Those are probably “p” and “p/s” for parallel/series, huh?

No, no calculus involved in the design, s = series, p = parallel, s/p = series or parallel

.
[Clemence]

Agro
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clemence wrote:
Agro wrote:
The format is not very convenient for me but a dense linear module that I could use instead of a flexible strip would be useful. Smile

I already made a design for linear 150mm x 15mm 757 MCPCB waiting to send to the factory.

Quite wide. Most LED strips are 8 mm. 10 mm is rarer but nevertheless well supported.
It’s not that finding a profile for a 15 mm PCB would be impossible but there are far fewer options.
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Just ordered a host for one of these.

https://www.fasttech.com/p/9664958

Just need to change the lens and swap the driver.

Planning 36 4000k optisolis in parallel.

Is running a 7×7135+fet driver with a 30q battery OK?

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Wait, is this an MCPCB for 3030 LEDs?

If so, I’m interested in getting 1pc for now, since I know what LEDs that I’ll be running Smile

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

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BlueSwordM wrote:
Wait, is this an MCPCB for 3030 LEDs?

If so, I’m interested in getting 1pc for now, since I know what LEDs that I’ll be running Smile


Yes it is. Smile
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BlueSwordM wrote:
Wait, is this an MCPCB for 3030 LEDs?

If so, I’m interested in getting 1pc for now, since I know what LEDs that I’ll be running Smile

And what are they? ?

BlueSwordM
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Was talking about these:
https://www.mouser.ca/Optoelectronics/LED-Lighting/LED-Emitters/High-Power-LEDs-White/_/N-8usfj?P=1yooj8k&Keyword=luminus&FS=True

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

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UPDATE 190617:
5700K (18x sm503 rfc00 & 18x sm653 rfa00) Optisolis module (9v configuration) prepared for testing in Finland

[Clemence]

JaredM
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Excited for the test results!

Also, I see that this board is available in your shop now. Can we get these with pre-mounted emitters? And how about the R95 3000K ?

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Got a test sample of the board populated with 5000K+6500K mixed Optisolis with 3S12P config. It’s beautiful, sunlight on a board. Haven’t tapped a heatsink for it yet but here it is at low power (500mA x ~8V).

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