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

Other Types of Lights LED Light Bulbs
1

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
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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
https://budgetlightforum.com/t/-/56393/31

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
https://budgetlightforum.com/t/-/57759

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[Clemence]

2

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

3

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]

4

I am talking of indipendant LED positive pads for each tint

5

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

[Clemence]

6

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)

7

Really want to buy a light bulb made with this. :laughing:

8

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

9

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

10

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 :+1:

11

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

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]

12

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:

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[Clemence]

13

Cool board! Contemplating an Optisolis flooder now :slight_smile:

14

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

15

Yes, a flooder like the Amutorch AT40 (but that one will be just a bit too small)

16

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. :slight_smile:

17

Would it work in a sofirn sp36?

18

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.

19

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?

20

Oh my… :person_facepalming:

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?