How do I implement dimming with BCR601 and BCR602?
Both devices have a fairly simple analog dimming interface. The LED current is reduced from 100% of nominal when you apply 3.3 V to pin MFIO down to 3% when MFIO voltage is 0.2 V. Operation is linear between these two points. Below 0.1 V the LEDs are completely off.
You may as well connect a variable resistor since there is an internal current source that drives it.
Finally, BCR602 will also accept a PWM signal that controls the LED current.