Calculating led build with flux typ.min.max

Geert

Active Member
Right now i'm planning my build with the samsung H series,
The have a calculator, but i dont know what the yellow flux data means.
I can choose the following:
Flux:
VF
Flux Factor:

Can someone help me out calculating this?

View attachment 4912476

Does anybody know wich one i have to choose?

Do i need flux min., Typ. OR max.
Do i need vf. Min, typ OR max?

In run the soft at 480ma
 

Rocket Soul

Well-Known Member
Does anybody know wich one i have to choose?

Do i need flux min., Typ. OR max.
Do i need vf. Min, typ OR max?

In run the soft at 480ma
Not sure but this might help you. Not sure if it calculates for H strips but you can get the diodes of the h strips.
In the data sheet there is usually a graph of vf against current, this will tell you what voltage. If you're running the strips at nominal current use typ. Max; maybe if they are really cold. This to the best of my guess and understanding
 

MedicinalMyA$$

Well-Known Member
Does anybody know wich one i have to choose?

Do i need flux min., Typ. OR max.
Do i need vf. Min, typ OR max?

In run the soft at 480ma
In the datasheets notes it says 'Samsung maintains a measurement tolerance of: Luminous flux: ±7 %, CRI: ±3.0, Voltage: ±0.3 V, Power Consumption: ±0.3W'
If using the 'Flux' options for example, if you toggle between Min. Typ.and Max. it changes the lm result.
I think it's not a 'setting', it just shows the results for worst to best case depending on the manufacturing variations within your bunch of strips.
So for Flux, Min. would be the least lm you could expect, Typ. would be the typical average, and Max. would be the most you could get.

This is also just a guess
 

end_of_the_tunnel

Well-Known Member
My take on the engine calculator is possibly mistaken. Note that datasheets for their "engines" list values of "Min", Typ" and "Max" for a given current. The current is denoted with "If". I guess this is to show the range of performance for the product. The "Min", Typ" and "Max" apply for luminous flux and also luminous efficacy.

Besides comparing different strips you can demonstrate the difference between product with same make of diodes that are maybe lower performing. See attached picture. Case A uses diodes with typical values for flux and Vf (forward voltage). Case B has diodes that run at a higher Vf. Case B is less efficient.
A versus B.png
 

end_of_the_tunnel

Well-Known Member
The engine calculator lets me select for Vf @ Max as in Case B. I always thought the min and max values displayed in samsung strip datasheets implied the variance in the binnings of the diodes used. Datasheet states forward current 960mA @ 50°C.

Perhaps the least ambiguous way to use the engine is to keep Flux and Vf at "Typ". In the Module Performance window, ramp Current up or down to see how consumption and output are affected.
 
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