Efficiency of Samsung LM561C diodes?

M

magus66

Member
Hi!

I need to calculate the heat watts / heat dissipation of Samsung LM561C diodes as I try to figure out what heat sink I need to get (in Germany).

Background:
I basically follow growmow5 on youtube

And my goal is to do this: Samsung F-Series LT-F562B 2′ LED Strip Build – 2’x2′ according to the LEDgardener's blog post.

The only thing is that I want to get a heat sink locally. Thus I have to do the calcs myself.

Any numbers? - the data sheets are not very informative - or I am blind or stupid or both
 
boilingoil

boilingoil

Well-Known Member
Use 3.4 btu's per watt to figure your cooling, but it really depends on how hard you are driving them as far as cooling goes.
 
M

magus66

Member
@sethimus Thanks. Are your Samsungs are about the same energy consumption?
I wonder why LEDgardnener recommends a heatsink... just for affiliate purposes?

@Observe & Report nice idea. Indeed I bought more strips, but by accident.
But how does that help me if my strips overheat and this I reduce their usage time and/or max power?

@boilingoil Thanks. I am afraid I did not yet dig deep enough into this topic. But I can't figure out how your answer can help. Do you have a link where I can obtain more insights into this?
 
Observe & Report

Observe & Report

Well-Known Member
Spreading the same power over more strips lowers the temperature of the diodes, if it is low enough you don't need heat sinks.
 
10WeekFlushBro

10WeekFlushBro

Well-Known Member
8w/ft of strip needs no cooling. In europe it's cheaper to run strips softer because everything is usually in increments of 50cm, i.e., just too short or too long. You'll have to order custom sizes or waste material due to the fact that all the strips come in feet, because, as we all know, the imperial system is the most widely used in the world and it is easy to understand immediately. :roll:
 
S

sethimus

Well-Known Member
the more i order from my metal supplier the cheaper the price per kg gets, even with custom length u profiles. you pay by the kg and per cut, that‘s why i recommended gemmel.
 
OLD MOTHER SATIVA

OLD MOTHER SATIVA

Well-Known Member
aluminum will hold strips straight but is not needed for the cooling..

panels are easier because they don't bend .but i prefer making a u profile frame for anything..and also to attach the fans to

Just room fans work if you have enough airr movement..as long as it is running over them

attached active led panel/strip fans are my fave because you don't have to worry if your room fan

stops
 
ANC

ANC

Well-Known Member
magus66 said:
@OLD MOTHER SATIVA And where do you attach the fans?
@ANC Cool build. Seems you are using u profiles as well?
Click to expand...
I use aluminium square stock and equal leg straight edges., They are cheap enough, straight, solid and rigid yet very thin and light.
The square stock took a bit of engineering as I used to build these with plastic trunking.

I think you may be better off using LM301b strips if you want minimal framing, they have metal-backed PCBs so are more efficient at getting the heat from the diodes to the back of the board.
 
ChiefRunningPhist

ChiefRunningPhist

Well-Known Member
magus66 said:
Hi!

I need to calculate the heat watts / heat dissipation of Samsung LM561C diodes as I try to figure out what heat sink I need to get (in Germany).

Background:
I basically follow growmow5 on youtube

And my goal is to do this: Samsung F-Series LT-F562B 2′ LED Strip Build – 2’x2′ according to the LEDgardener's blog post.

The only thing is that I want to get a heat sink locally. Thus I have to do the calcs myself.

Any numbers? - the data sheets are not very informative - or I am blind or stupid or both
Click to expand...
57% effeciency at 150mA and while maintaining 25°C.
 
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