I'm designing a circuit using an LED driver that is intended for RGB LEDs and uses a resistor to set the current for the constant current supply.
On the LED datasheet, each color is tested at different forward currents
- Red @ 20mA (max 25mA)
- Green @ 15mA (max 25mA)
- Blue @ 10mA (max 20mA)
It would be wise to stay away from the absolute maximum ratings. One priority is designing for longevity / lifetime of LEDs.
If I set the current to 10mA per channel, with 2 LEDs per channel, how do I calculate the ballast resistors (high side)?