Datasheet Summary
INTEGRATED CIRCUITS
PCA9532 16-bit I2C LED dimmer
Product data Supersedes data of 2003 Feb 26 2003 May 02
Philips Semiconductors
Philips Semiconductors
Product data
16-bit I2C LED dimmer
DESCRIPTION
The PCA9532 is a 16-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps for Red/Green/Blue (RGB) color mixing and back light applications. The PCA9532 contains an internal oscillator with two user programmable blink rates and duty cycles coupled to the output PWM. The LED brightness is controlled by setting the blink rate high enough (> 100 Hz) that the blinking cannot be seen and then using the duty cycle to vary the amount of time the LED is on...