The PCA9632 is an I2C-bus controlled 4-bit LED driver optimized for
Red/Green/Blue/Amber (RGBA) color mixing applications. The PCA9632 is a drop-in
upgrade for the PCA9633 with 40′ power reduction. In Individual brightness control mode,
each LED output has its own 8-bit resolution (256 steps) fixed frequency Individual PWM
controller that operates at 1.5625 kHz with a duty cycle that is adjustable from 0 % to
99.6 % to allow the LED to be set to a specific brightness value. In group dimming mode,
each LED output has its own 6-bit resolution (64 steps) fixed frequency Individual PWM
controller that operates at 6.25 kHz with a duty cycle that is adjustable from 0 % to 98.4 %
to allow the LED to be set to a specific brightness value. A fifth 4-bit resolution (16 steps)
Group PWM controller has a fixed frequency of 190 Hz that is used to dim all the LEDs
with the same value.