JAJSOJ3A March 2022 – May 2022 LP5891
PRODUCTION DATA
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The LP5891 is a highly integrated RGB LED driver with 48 constant current sources and 16 scanning FETs. A single LP5891 is capable of driving 16 × 16 RGB LED pixels while stacking four LP5891 devices can drive 64 × 64 RGB LED pixels. To achieve low power consumption, the device supports separated power supplies for the red, green, and blue LEDs by its common cathode structure. Furthermore, the operation power of the LP5891 is significantly reduced by ultra-low operation voltage range (VCC down to 2.5 V) and ultra-low operation current (ICC down to 3.6 mA).
The LP5891 supports 0.2 mA to 20 mA per channel with typical 0.5% channel-to-channel current deviation and typical 0.5% device-to-device current deviation. The DC current value of all 48 channels is set by an external IREF resistor and can be adjusted by the 8-step global brightness control (BC) and the 256-step per-color group brightness control (CC_R/CC_G/CC_B).
The LP5891 implements a high speed rising-edge transmission interface to support high device count daisy-chained and high refresh rate while minimizing electrical-magnetic interference (EMI). The LP5891 supports up to 50-MHz SCLK (external) and up to 160-MHz GCLK (internal).
The LP5891 also implements LED open, weak-short, and short detections and can also report this information out to the accompanying digital processor.