PCA9957 Description
The PCA9957 is a daisy-chain SPI-patible 4-wire serial bus controlled 24-channel constant current LED driver optimized for dimming and blinking 32 mA Red/Green/Blue/Amber (RGBA) LEDs. Each LED 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 100 % to allow the LED to be set to a specific brightness...
PCA9957 Key Features
- 24 LED drivers. Each output programmable at
- 8 bits programmable LED brightness
- 8 bits programmable group dimming/blinking mixed with individual LED brightness
- Programmable LED output delay to reduce EMI and surge currents