PCA9957 - 24-channel SPI serial bus 32mA/5.5V constant current LED driver
The PCA9957 is a daisy-chain SPI-compatible 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
PCA9957 Features
* 24 LED drivers. Each output programmable at:
* Off
* On
* 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
* Gradation control for all ch
