I dimly remember the LED forward voltage voltage varies with temperature.
I think you definitely will need a currrent source.
I think the LEDs must all be connected in series.
Do you have LEDs that can carry 3 Amps?
2 serial strings in parallel should also be possible, but then the LEDs
must be selected and matched for forward voltage at a given current,
otherwise they will have different brightness and efficiency
Regerds
Rene Charton
"ce-test,
qualified testing
bv - Gert To
Gremmen" <k...@earthlink.net>,
<g.gremmen@cetest <emc-p...@ieee.org>
.nl> cc
Sent by:
emc-p...@ieee.org Subject
RE: LED Chamber Lighting - drivers
outside the chamber
03/01/2013 10:49
PM
I am building some new 4 x 100 Watt LED
luminaires supplied by 35 Volts DC @ 3 Amps.
I'll LED you know my experiences in a few weeks....
I will try using a voltage stabilizer first.
If the terminal voltage varies much with temperature
a current driver approach may be necessary.
These 10x10 LEDS start at 28 Volts and draw
full current at 37 Volts, and create an awful lot light.
Regards,
Ing. Gert Gremmen, BSc
g.grem...@cetest.nl
www.cetest.nl
Kiotoweg 363
3047 BG Rotterdam
T 31(0)104152426
F 31(0)104154953
�� Before printing, think about the environment.
-----Oorspronkelijk bericht-----
Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens Cortland Richmond
Verzonden: Friday, March 01, 2013 3:19 PM
Aan: emc-p...@ieee.org
Onderwerp: Re: LED Chamber Lighting - drivers outside the chamber
You need a constant-current source; how about an adjustable 3 terminal
regulator set up as one?
Cortland Richmond
On 3/1/2013 0900, Rene Charton/Twn/TUV wrote:
> ...ideas to generate a clean DC current?
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