PCA9957 Datasheet - NXP

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

PCA9957-NXP.pdf