How hard can you push the samsung F series gen 3 strips?

thetr33man

thetr33man

Well-Known Member
Viceman666 said:
Watt = volt x current
So if youre getting 43w at 23v it means you have 1.86A current

To get to 60 W you would need 2.5A

I have no idea if the strip can take it but thats the simple math
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This driver is only 89% efficient so the strip is only getting 38w Im guessing, and thats if it was running full power, its likely less efficient in the current config. If you figure 38w and 1.4 amps then U get 27v which I suppose is my problem. Didnt expect the voltage to climb so fast, or else there is an issue with this specific strip...
 
thetr33man

thetr33man

Well-Known Member
wietefras said:
Is there perhaps a dimmer pot on the driver which you can adjust to get it to full power?
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Nope, at first I had the pot hooked up and thought maybe there was an issue with the resistance of the pot, but I removed it and it measures exactly the same...
 
Randomblame

Randomblame

Well-Known Member
That's a 24v constant voltage driver, it puts out constant 24v you need probably 27-28v to max out the strip current. But if you go above its rated voltage the current will be lowered to avoid damage. That's the reason. You will need another driver.
 
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Randomblame

Randomblame

Well-Known Member
A PLD-60-1750B can be used to max out your strip @1750mA or if you realy want to reach the strip limits you can use a PLD-60-2000B. PLD-60-2400B's voltage range is too low with 25v max. but the 2A version could also be too much already. You do it at your own risk.

Screenshot_20180214-170442.png
 
Randomblame

Randomblame

Well-Known Member
The datasheet from PWM-60 is a bit missleading by claiming to run all kind of LED strips. But they actually mean all constant voltage strips, mainly seen as flex strips with 12 or 24v CV.
The F-Series strips use a constant current design and for a single strip you need a CC driver. You could use two strips in parallel to max out the driver. That's the only way I see to get the full 60w out of this CV driver using the 2ft. F-strips.
 
thetr33man

thetr33man

Well-Known Member
How would you calculate approximately what V this strip will be at if one were to push 2a into it? 2.5a? Is there a graph somewhere. I didnt see anything in the data sheet for the strip on the site it was ordered from...
 
nfhiggs

nfhiggs

Well-Known Member
thetr33man said:
So I put my light together last night. Im a little disappointed because the 60w driver is only pulling 43w at the wall. Must have gone over voltage, its rated for 24v and this strip is supposed to be 23v @ 1120? Not as bright as I was hoping and it barely gets my heatsink warm. I mounted it with screws and thermal paste. I measured and its pulling about 1400ma from a driver thats supposed to put out 2500... :(
View attachment 4089467
View attachment 4089468
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That's probably a good thing. Samsung spec sheet says 24.2V gets you the rated max of 1800 mA for the F562B strips. Trying to run them at 2.5 amps is almost 40/% above max current. That gets you rather poor efficiency and a short lifespan. The driver and strips are performing exactly as they should.
 
Randomblame

Randomblame

Well-Known Member
thetr33man said:
Ordered one of these badboys, free shipping and cheaper than the other stupid driver I had bought... https://www.arrow.com/en/products/hlg-60h-24a/mean-well-enterprises Too bad I didnt see them earlier.
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Mate, that's again a CV driver. It run only in CC mode, when the voltage is lower as 24Vdc. BUT it has a voltage regulator, which means it can work with up to 27v. I recommend to use at least 2 strips in parallel to avoid damage on the strip. 2,5A is way more as 1800mA.
 
Randomblame

Randomblame

Well-Known Member
nfhiggs said:
There is nothing wrong, everything is working as it should.
View attachment 4089890

Run them over max at your own risk...
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Hey, mate!

The voltage from F-Series datasheet(21,9 - 24,2v) is the min./max. at 1120mA(@25-85°), coresponding to the wattage of 24,5 - 27,1w(21,9 x 1,12A= 24,5w min. @85°, 24,2v x 1,12A= 27,1w max. @25°).
At 1,8A the voltage should be around 25-25,5v depending on Ts. temps.
The datasheets of the sammy strips are pretty shitty compared to those used by Bridgelux for the old EB series. But the new ones for gen.2 are not much better either, unfortunately!

Screenshot_20180215-073000.png

That's a screenie from LM561c datasheet current vs. voltage. The graph shows probably the AZ mid voltage bin(2,75v@65mA) not A1, that means, the graph shifts a good bit to the right for A1 bin. A1 should be at ~2,85v @65mA(2,8-2,9V), so 3,1-3,2v@200mA.

Screenshot_20180215-073746.png
 
thetr33man

thetr33man

Well-Known Member
Got new driver hooked up. Full power it pulls 83w at wall. Strip didn't seem to mind. Turned it down to 60w at wall and let run for several hours didn't get to hot at heatsink. Didn't measure actual strip temp.20180220_221003.jpg
 
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