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Dimming with Constant Current LED Power Supply

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lmagalhaes:
Hey there,

I have a HLG-320H-C700B LED Power supply and I wanted to have a custom PCB with 4 rows of LEDs of different colors. Then, I'd like to have 4 controls of 0-10V to dim each row individually. Is this at all possible?

With an opamp sensing a resistor on the beggining of each LED string would this be possible? I'm not used to working with constant current supplies. How would it handle this situation ? How would it determine the output voltage ? Would adding another resistor in order to drop the remaining voltage be enough ? It has a maximum of 700mA in total, but they could be distributed, in theory, in anyway for those 4 LED rows right?

Let me know if I'm just wasting time trying to figure this one out.

Luís

Marco:
This is just making life unnecessarily hard on yourself, use a constant voltage power supply and 4 adjustable buck led drivers.

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