samsung hard strips
- Thread starter caretak3r
- Start date
robincnn
Well-Known Member
Were you able to adjust the voltage so that you can run even a single strip on that hlg-185h-48a
I use a 24V 3A rated power supply. I use it for my Aamsung strip and it runs at 1A. It does not run at 3A because strip wants more voltage for higher current and my Constant voltage drivers does not give more than 24.X V.
Strips are fine with constant voltage. When you design just check current and the max voltage that the driver is willing to push. With A type drivers limiting voltage is easy so i think hlg-185h-48a can even power a single 48V strip. Limiting voltage and running Cobs in parallel safely was Supra's Idea.
Do share more pics when you add more strips. Looks great.
robincnn
Well-Known Member
@OneHitDone
Plenty of optics with Voltage, Pitch, mounting style, width, length. Digikey has enough options to confuse anyone. Google 'Digikey LED Lighting - COBs, Engines, Modules '
The samsung strips come in different LED pitch size. Choose a longer pitch if you do not need as much light.
Even Lumileds has hard strips. Their flexible strips come in different pitches too.
Plenty of optics with Voltage, Pitch, mounting style, width, length. Digikey has enough options to confuse anyone. Google 'Digikey LED Lighting - COBs, Engines, Modules '
The samsung strips come in different LED pitch size. Choose a longer pitch if you do not need as much light.
Even Lumileds has hard strips. Their flexible strips come in different pitches too.
caretak3r
Well-Known Member
added 2nd strip. this time I used the HLG-185h-48A to drive 2 strips in parallel. I confirmed that the driver can act in CC mode, adjusting voltage as needed (observed as low as 22V). I dialed in the current so that it showed 67W on my killawatt and let it run with 2X strips for 20 minutes. Highest temp reading with the infrared thermometer was 101F and that was again directly behind either of the two strips. As you move laterally way from the mounting point, the temperature drops fast (I'm trying to point out that the whole baking sheet isn't anywhere near 100F, only close to where the strips are mounted). The strips are mounted about 1.5" apart or so, will measure later. In this particular situation, my 14 x 18 sheet can only handle 2 of these strips mounted diagonally and I only have 2 to test with anyway. It appears that one could extend this out as long as you are mounting 1.5 to 2" between strips and be just fine.
edit - strips are mounted a hair less than 1" apart
edit - strips are mounted a hair less than 1" apart
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caretak3r
Well-Known Member
reviewed in-stock influx models on verical - the L04 and L09 are the cheapest available per LED. Verical has all 4 color options available in the L04 (33W) for only $8.89 minimum quantity 3.
https://www.verical.com/s/3n80l1ww/
I originally entertained the idea of using the shorter S02s but I think I'm going to go with either the L09 or L04
https://www.verical.com/s/3n80l1ww/
I originally entertained the idea of using the shorter S02s but I think I'm going to go with either the L09 or L04
caretak3r
Well-Known Member
I don't have a great answer, but I believe you don't need a ton. For the two strips I mounted (22" or so), I tried to apply a thin line of TIM right behind the leds, and when I mounted it to the pan/sink, i pushed it around to thin out the paste before putting the screws in. I used up 1 complete tube (4g) of mx4 for the two strips. If I were mounting more, I'd definitely buy something in larger quantity than 4g tube. There's another thread with recommendations of TIM that come in larger quantities for reasonable prices.
robincnn
Well-Known Member
561B
55 -85 Tc 10000hrs 96.5 lumen% maintenance
104 Tc 10000hrs 85% lumen maintenance
I did not use any TIM
Used only screwed for the 22in board on heatsink.
Samsung made this recommendation
It is depending on your design but in most cases, it does not require thermal interface material in between the F-series module and the fixture.
55 -85 Tc 10000hrs 96.5 lumen% maintenance
104 Tc 10000hrs 85% lumen maintenance
I did not use any TIM
Used only screwed for the 22in board on heatsink.
Samsung made this recommendation
It is depending on your design but in most cases, it does not require thermal interface material in between the F-series module and the fixture.
JorgeGonzales
Well-Known Member
Couldn't hurt to use TIM though
I decided to go a different direction, but made this for myself (all gen2 numbers):
No influx series. They are cheaper, but less efficient, and these were cheap enough for my purposes. I chose A,B, or C based on which was the better deal. These are all 3000K models, running at test currents.
Does anybody know what actual LEDs are used? I swear I read that somewhere on Samsungs site, maybe it was a brochure. I'd like to see the spectrums and temperature vs efficiency charts. Might be able to do better than 50C test points.
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caretak3r
Well-Known Member
LM561B for M-series -- found here:
http://www.samsung.com/global/business/business-images/led/file/product/lighting/201407/Data_Sheet_M552_series_Rev.1.7.pdf
JorgeGonzales
Well-Known Member
Sorry those are all gen2 above, I didn't use model numbers because Samsung is not very consistent with naming. 4ft M-series was about all they seem to call them, for instance, but I will clarify above.
So, actually here:
http://www.samsung.com/global/business/business-images/led/file/product/lighting/201604/Data_Sheet_M562_Gen2_Rev.2.0.pdf
But neither have spectrum or much data outside of their test currents. At least gen2 has current vs efficiency data, but since we were talking about cooling, I thought it would be fun to see the temp vs efficiency charts.
I mean these are just individual leds strung together, I'm assuming the pertinent data is with their documentation.
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caretak3r
Well-Known Member
yep - that pdf you referenced says they are lm561b+ (plus)
so
http://www.samsung.com/global/business/business-images/led/file/product/lighting/201506/Data_Sheet_LM561B_Plus_Rev.1.0.pdf
JorgeGonzales
Well-Known Member
Ah, I see it now under structure. I knew I saw it somewhere. Thanks! I didn't realize LM561B was the led, I thought it was the strip model. M561/M562...thought it was mm when Robin mentioned it. That was so confusing.
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MrTwist1
Well-Known Member
That's interesting to hear. I actually just received my Samsung Influx L09s just now. Having just run out of TIM I decided to try mount one on a heatsink with cable ties (really tightly held down) and hook it up to a COB string that had space left @1050mA. I ran it dimmed to about 500mA for a few minutes and I barely felt any heat at all. I ran it closer to 1050mA and I felt a little heat, but not much. I did not want to push it so I left the experiment there, but it's good to hear that you did the same and it runs fine.
It's interesting to hear that Samsung make this recommendation. Looking at the different materials on these compared to ceramic COBs, it does seem like they're not really designed for TIM.
MrTwist1
Well-Known Member
I just tried an L09 on a (non-dimmable) 1.4A COB string. The LED strip and the 22" HSUSA 2.09 inch heatsink with no TIM both got pretty hot after a few minutes and I lost my nerve. I guess there must be pretty good contact for the heatsink to get so hot.
I need to do this again and take some temp readings. It seems like this heatsink should be good for dissipating about 42W of heat, and I think the L09 should be around 30-35W (Anyone know how to get efficiency expressed as a percentage from lm/W?) at this current... but I am in no hurry to blow my shiny new LED strips. More testing needed.
I need to do this again and take some temp readings. It seems like this heatsink should be good for dissipating about 42W of heat, and I think the L09 should be around 30-35W (Anyone know how to get efficiency expressed as a percentage from lm/W?) at this current... but I am in no hurry to blow my shiny new LED strips. More testing needed.
JorgeGonzales
Well-Known Member
Hmm...something seems off there. 42W seems like an awful lot for that...let's see.
Yeah, only 1848cm2, so aim for more like ~16W of heat. So if you are anywhere near 30-35W thats going to be blazing hot, back of the napkin maybe 60C above ambient? Not awesome. Those particular strips are a beast.
How are these installed in real life? I know the testing temp is 65C at the test point, but the density is so high on the L09.