Samsung F Series (underrated)

So I'm building another sammy f series gen 3 light. And was looking at ledgardners strip calc took. Got to looking. On the Samsung data sheet. It says max current is 1800mA at 24.2vdc pushing 43.56w per strip. The datasheet says 27.1w not sure how they got that. Bc 24.2 x 1.8 is 43.56 not 27.1

But anyway ledgardner says for (4) strips 100% max to use a HLG-185H-24 driver. Which is maxed out at 24.4vdc and 7.8a which run in parallel is 1.950a or 1950mA and run at 24.4vdc is 47.58w per strip. So is the datasheet from Samsung way underrated when they say 1800mA is max current? By the way I'm using f562b strips. Single row 560mm(2 footers)

I'm running 7 strips total. (3) in 3k and (4) in 4k and ledgardner says to use the HLG-150H-24 for 100% max for the 3 strips. And the hlg-185h-24 for the 4 strips. Both run in parallel. So my question is, are they that underrated or is the Samsung calculator wrong on ledgardners site. I already have the HLG-150h-24 driver. But I'm not sure if it's too much for 3 strips. Pushing 6.3a over 3 strips @24vdc run at 2100mA per strip and 50.4w

What's your thoughts @Randomblame

So I think I figured it out. It says 5.4a 24.4vdc the strips will only draw their max which is 1800mA. Even though the driver is 6.3a the strips will only pull what they can handle which from that driver is 1766mA is that right @Randomblame

Probably. It you limit the voltage you also limit current flow. At 200mA each diode would need up to 3,2v @25°C and 3,1v @65°C. As long as you limit the voltage to a maximum of 25v it would be safe and the strips can only get ~1,8amps. Same goes for min./max. watts.
The min./max. voltage you see in the datasheet is for 1120mA(highest voltage at 25°C, lowest voltage at 95°C) To know the voltage each diodes needs at max. current have a look at the LM561c datasheet. A1 voltage bin means 2,8-2,9v at 65mA and 3,1-3,2v at 200mA.

whytewidow said:

So I think I figured it out. It says 5.4a 24.4vdc the strips will only draw their max which is 1800mA. Even though the driver is 6.3a the strips will only pull what they can handle which from that driver is 1766mA is that right @Randomblame

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whytewidow said:

So I'm building another sammy f series gen 3 light. And was looking at ledgardners strip calc took. Got to looking. On the Samsung data sheet. It says max current is 1800mA at 24.2vdc pushing 43.56w per strip. The datasheet says 27.1w not sure how they got that. Bc 24.2 x 1.8 is 43.56 not 27.1

But anyway ledgardner says for (4) strips 100% max to use a HLG-185H-24 driver. Which is maxed out at 24.4vdc and 7.8a which run in parallel is 1.950a or 1950mA and run at 24.4vdc is 47.58w per strip. So is the datasheet from Samsung way underrated when they say 1800mA is max current? By the way I'm using f562b strips. Single row 560mm(2 footers)

I'm running 7 strips total. (3) in 3k and (4) in 4k and ledgardner says to use the HLG-150H-24 for 100% max for the 3 strips. And the hlg-185h-24 for the 4 strips. Both run in parallel. So my question is, are they that underrated or is the Samsung calculator wrong on ledgardners site. I already have the HLG-150h-24 driver. But I'm not sure if it's too much for 3 strips. Pushing 6.3a over 3 strips @24vdc run at 2100mA per strip and 50.4w

What's your thoughts @Randomblame

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Nope, they are not underrated. All these number are for 1120mA. With min./max. watts its the same like with min./max. voltage. The numbers are for 25° and 95°C at nominal current of 1120mA.
HLG-150 and 185 would work and when you use the voltage regulator to nail the voltage to 25°C it would be save.

Randomblame said:

Probably. It you limit the voltage you also limit current flow. At 200mA each diode would need up to 3,2v @25°C and 3,1v @65°C. As long as you limit the voltage to a maximum of 25v it would be safe and the strips can only get ~1,8amps. Same goes for min./max. watts.
The min./max. voltage you see in the datasheet is for 1120mA(highest voltage at 25°C, lowest voltage at 95°C) To know the voltage each diodes needs at max. current have a look at the LM561c datasheet. A1 voltage bin means 2,8-2,9v at 65mA and 3,1-3,2v at 200mA.

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If the strips didnt cost so much I'd put my hlg240 on 4 of them. 24a series. So I could adjust both the current and and voltage. And see if the strips hold 2500mA each @24.4vdc with really good cooling. 61w per strip on a f562b x4 strips 244w I bet the Sammy's would take it if cooled really well. I'd almost bet they are underrated in their max 1800mA. They have 72 diodes. I have some 96 diode sunboards. With lm561c s03 diodes. Short fat strips. Two rows of 48. 700mA typ and 900mA max per row. And max is 1800mA per strip. And I put 2000mA on them on good heat sinks. And they are still rocking. So i bet the f562b would hold atleast 2amps as well. I'd like to test them to see how they hold up. I've seen posts with the 96 diode sunboards I have being run at 2.5a but they got hot so he backed them off.

Randomblame said:

Nope, they are not underrated. All these number are for 1120mA. With min./max. watts its the same like with min./max. voltage. The numbers are for 25° and 95°C at nominal current of 1120mA.
HLG-150 and 185 would work and when you use the voltage regulator to nail the voltage to 25°C it would be save.

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So you would need the A series with both pots to run the hlg185 on 4 strips. Bc its 7.8a max. And if max is 1800mA per strip, that's only 6.3a across 4 strips.And 7.8a max hlg185 driver which is 1950mA per strip. 150mA over the max. So using the A series you could adjust the current down to 6.3a of the 7.8 it has. Right?

Yeah, they can handle more when cooled properly but it will shorten their lifetime even with 65°C case temps.

At 2,5a each strip would need at least 27v or so because each diode would probably need up to 3,4v. The 24,2v is the maximum voltage at 25°C, 23v it would be with 65° and 21,9v it would be at 95°C.

You have 8 diodes in series 9 times in parallel. 2,5amps drive current means 277mA per string and the max. voltage would go up to 3,3-3,4v per diode, so with 8 diodes in series the voltage would be between 26,4 and 27,2v.

So actually the HLG-150H-24 is 6.3a is too much for 3 strips. Bc that's over the 1800mA max. Its 2100mA and it's the B series driver external pot. I'll have to hook the pot up and crank it all the way down. And hook my meter up to it and bring it up 1800mA/strip or 5.4A and leave it there so they dont get over driven. I'll do the samething with the Hlg185 over the 4 strips of I go with that driver. If not I gotta use the hlg150 over the 4 strips to stay under the 1800mA max and use a hlg120 for the 3 strips bc its rated at 5amps which would be 1666mA per strip.

whytewidow said:

So you would need the A series with both pots to run the hlg185 on 4 strips. Bc its 7.8a max. And if max is 1800mA per strip, that's only 6.3a across 4 strips.And 7.8a max hlg185 driver which is 1950mA per strip. 150mA over the max. So using the A series you could adjust the current down to 6.3a of the 7.8 it has. Right?

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Nope! The B version is set to 24v and the voltage goes only above that when the driver compensates a little voltage droop. In this case you would see a slightly higher voltage. But its impossible to max out the strips. If you want to drive them at max. current you need the A version drivers and set a higher voltage.(both drivers)

whytewidow said:

So actually the HLG-150H-24 is 6.3a is too much for 3 strips. Bc that's over the 1800mA max. Its 2100mA and it's the B series driver external pot. I'll have to hook the pot up and crank it all the way down. And hook my meter up to it and bring it up 1800mA/strip or 5.4A and leave it there so they dont get over driven. I'll do the samething with the Hlg185 over the 4 strips of I go with that driver. If not I gotta use the hlg150 over the 4 strips to stay under the 1800mA max and use a hlg120 for the 3 strips bc its rated at 5amps which would be 1666mA per strip.

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Nope! The strips don't get the max. current at 24v! This screeny is from LM561c and shows how LM561c behave with different drive current and case temps and the used voltage bin is AZ mid bin/2-7-2,8v. With A1 bin you can add 0,1v.


Edit:
To get 200mA on each diode you need at least 24,8-25,6v and therefor you need either the A version or you need the HLG-150/185H-27B's but with this driver the strips would use all the current available

So I think to be the most efficient way for this light I should go run em like this.

(4) strips on HLG-150H-24 6.3a max @ 1575mA on 24v 37.8w per strip for 151.2w of 4k

(3) strips on HLG-120h-24 5.0a max @ 1666mA on 24v 40w per strip for 120w of 3k

And my two cxa3050s in 4k on the 1800mA CC driver I'm using running 900mA at 35v for 31.5w for a total of 63w

Total wattage of light 334.20w in my 32x32 tent which is roughly 2.666×2.666= 7.107 square feet
And around 47.02w/sqft that should flower fairly well.

Now you got it, bro! Thats exactly what you can expect using B version drivers!

Randomblame said:

Nope! The B version is set to 24v and the voltage goes only above that when the driver compensates a little voltage droop. In this case you would see a slightly higher voltage. But its impossible to max out the strips. If you want to drive them at max. current you need the A version drivers and set a higher voltage.(both drivers)

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Well I already have the hlg-150-24b driver. So I wanna use it. So prob best to run it on the 4 strips and get either another hlg150 24a drivee fir the 3 strips and max them out that way. Or drop down to the hlg120 driver. To keep them under the 1800mA max. Bc of already having the b series driver.

Randomblame said:

Now you got it, bro! Thats exactly what you can expect using B version drivers!

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Yeah I didnt even think about it when I ordered the b series driver. Should went with both A series drivers. That way I couldve set both current and volt. And run them at max 1800mA a strip but I got all part ordering happy. And didnt pay attention.

Edit: and I kindve like the external pot bc I mount my drivers in a box.on the wall. And put the pots through the door. With a label under it as to what n which they control. And using a series I have to open the door to adjust it.

HLG-120 for 3 and HLG-150 for 4 strips would work perfect and its already a lot of light!

@Randomblame I super appreciate your time and knowledge man. You have been extremely helpful. Every question I've had. You've answered and given excellent info and right info. Which on here is far and few inbetween. I owe you man. Thank you again.

Yeah, thanks man!
All these different datasheets can easily be misinterpreted because each manufacturer cooks their own soup and make different mistakes and it takes a while to fully understand all the functionality and how all these features work together.

Samsung for instance should have separated the min./max. voltage and wattage numbers or at least mentioned additional info(about drive current + temps).
You are not the first one stumbled on this numbers...

gonna max out 2 hlg 480c 2100b with 15 fb22b each in a 3p5s config