PCA9957 driver equivalent, 24-channel spi serial bus 32ma/5.5v constant current led driver.
* 24 LED drivers. Each output programmable at:
* Off
* On
* 8 bits programmable LED brightness
* 8 bits programmable group dimming/blinking mixed with.
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 .
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