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PCA9959
24-channel SPI serial bus 63 mA/5.5 V constant current LED
driver
Rev. 1.3 — 23 May 2022
Product data sheet
1 General description
PCA9959 is a daisy-chain SPI-compatible 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 groups. For each group, PCA9959 supports 64-grid brightness control, with the time duration of each grid adjustable from 2.5 μs to 1 ms. Each LED output can be off or on, set at its individual preset current value within each grid.
PCA9959 Datasheet
