LED Driver IC 16 Output Linear PWM Dimming 25mA 5.5V 28-TSSOP
PCA9685PW,118 is a 16-channel, 12-bit PWM LED controller with an I²C interface designed for LED dimming, RGB/RGBA lighting, and servo motor control applications. It provides independent PWM control for up to 16 outputs, allowing precise brightness or position control while minimizing MCU GPIO usage. The device supports Fast-mode Plus I²C communication up to 1 MHz and operates from a 2.3 V to 5.5 V supply range. It is commonly used in robotics, LED backlighting, automation systems, and PWM expansion modules for microcontrollers such as Arduino, ESP32, and Raspberry Pi.
Key Features
16 independent PWM output channels
12-bit PWM resolution (4096 steps)
Programmable PWM frequency from approximately 24 Hz to 1526 Hz
I²C Fast-mode Plus compatible interface up to 1 MHz
Six hardware address pins allowing up to 62 devices on one I²C bus
Programmable open-drain or totem-pole outputs
Output capability:
25 mA sink current
10 mA source current
Internal 25 MHz oscillator with optional external clock input
Individual programmable LED ON/OFF timing for reduced EMI and current surges
Supports software reset and group addressing (All Call/Sub Call)
5.5 V tolerant inputs and outputs
Operating voltage range: 2.3 V to 5.5 V
Package: 28-pin TSSOP (PW suffix)
