PCA9959 Description
PCA9959 is a daisy-chain SPI-patible 4-wire serial bus controlled 24-channel constant preset current LED driver, optimized for dimming and blinking 63 mA Red/ Green/Blue/Amber (RGBA) LEDs. Each LED output has its own 6-bit resolution (64 steps) preset current configuration, with an absolute accuracy of ±8 %. PCA9959 supports up to four groups of LED gradation control, with each LED channel assigned to one of the...
PCA9959 Key Features
- 24 LED drivers, each output programmable at
- 6 bits programmable LED brightness
- Programmable LED output delay to reduce EMI and surge currents
- Gradation control for all channels
- Each channel can assign to one of four gradation control groups
- 64 grids for gradation control for each channel
- Programmable grid duration time
- Four preset current options for each channel during gradation control
- 24 constant preset current output channels can sink up to 63 mA, and tolerate up to 5.5 V when OFF
- Output preset current adjusted through an external resistor (REXT input)