PCA9532 Overview
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...
PCA9532 Key Features
- 16 LED drivers (on, off, flashing at a programmable rate)
- 2 selectable, fully programmable blink rates (frequency and duty
- 256 brightness steps
- Input/outputs not used as LED drivers can be used as regular
- Internal oscillator requires no external ponents
- I2C-bus interface logic patible with SMBus
- Internal power-on reset
- Noise filter on SCL/SDA inputs
- Active-LOW reset input
- 16 open drain outputs directly drive LEDs to 25 mA