Author Topic: Dimming with Constant Current LED Power Supply  (Read 440 times)

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Offline lmagalhaesTopic starter

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Dimming with Constant Current LED Power Supply
« on: July 08, 2020, 03:18:03 pm »
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
 

Offline Marco

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Re: Dimming with Constant Current LED Power Supply
« Reply #1 on: July 08, 2020, 10:58:50 pm »
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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