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Are your LED in series or parallel?

I would normally put one resistor in series with each LED with the LEDs
in parallel to the supply.


+24v DC  ------------------
              \           \
              /           /
              \           \
              /           /
              |           |
              |           |
             ___         ___
             \ /         \ /
              v           v
             ___         ___
              |           |
              |           |
0v DC    ------------------             

_______________________________________
 
Roy Hopkins
New Zealand
_______________________________________
 
> 
> i'm new to power-led design area. I have to design a led strip with 6
> white
> power led. I chose Luxeon
> III Emitter White leds for my application. I have prepared the pcb and
> proper heatsink for my design.
> The strip will be sourced with 24V DC Meanwell smps. (this smps has
max
> 10A
> drive capability) So i
> calculated required resistor value for driving the strip at 1A which
is
> 24-6Vf = R (The datasheet of
> Lux III Emtter notes that it has 3.90 forward voltage at 1A) So i have
> chosen the Resistor value
> 0,75R / 5W. But when i conntected the serie to the power supply i only
get
> 500mA and the value
> increased slowly to the 650mA and after that no increasing in current.
> 
> I looked the luxeon datasheets and application notes over and over but
> still
> i havent found where is
> the problem? Do i need to design a specific smps with different
topologies
> or else?
> (Datasheets and application notes can easily found on www.luxeon.com)

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