What sort of LED driver should I get/make?

LowQCab

Joined Nov 6, 2012
4,029
You can put a Current-Regulator on every LED-Chip if You want to go to all the complexity required,
and that would provide the best protection and control,
and eliminate any benefit from the Resistors.

I'm guessing that each 3-LED-Chip will need ~500ma, and may survive as high as ~750ma.,
You have a lot of Chips ........ 500ma, X 4 = 2-Amps,
You need to make sure that your Current-Regulators can easily
supply the amount of Current that will be needed.
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Thread Starter

LikeTheSandwich

Joined Feb 22, 2021
164
You can put a Current-Regulator on every LED-Chip if You want to go to all the complexity required,
and that would provide the best protection and control,
and eliminate any benefit from the Resistors.

I'm guessing that each 3-LED-Chip will need ~500ma, and may survive as high as ~750ma.,
You have a lot of Chips ........ 500ma, X 4 = 2-Amps,
You need to make sure that your Current-Regulators can easily
supply the amount of Current that will be needed.
.
.
.
I've tried running them at a combined 3A, so about 150mA/LED and they get pretty warm with that. I'd be kind of afraid to run them any higher. They are on a large copper board of some kind, and I applied a good amount of CPU thermal paste between it and the heatsink, and the heatsink start to get warm in under a minute at those current levels.
 

LowQCab

Joined Nov 6, 2012
4,029
Watch the Temps with an Infa-Red-Thermometer, or stay very conservative.
Don't exceed around 75-degrees C,
the actual LED-Junctions will be running much hotter than what You can measure on the outside.
.
.
.
 
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