PCA9955
Description
The PCA9952 and PCA9955 are I2C-bus controlled 16-channel constant current LED driver optimized for dimming and blinking 57 mA Red/Green/Blue/Amber (RGBA) LEDs in amusement products. Each LEDn output has its own 8-bit resolution (256 steps) fixed frequency individual PWM controller that operates at 31.25 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.
Key Features
- 16 constant current output channels can sink up to 57 mA, tolerate up to 40 V when OFF
- Output current adjusted through an external resistor
- Output current accuracy 6 % between output channels 8 % between PCA9952/55 devices
- Open/short load/overtemperature detection mode to detect individual LED errors
- 1 MHz Fast-mode Plus compatible I2C-bus interface with 30 mA high drive capability on SDA output for driving high capaciti
