The LP5891 is a highly integrated, common cathode matrix LED display driver with 48 constant current sources and 16 scanning FETs. One LP5891 is capable of driving 16 × 16 RGB LED pixels, while stacking two LP5891 can drive 32 × 32 RGB LED pixels, three LP5891 are capable of driving 48 × 48 RGB LED pixels, and stacking four LP5891 can drive 64 × 64 RGB LED pixels, which simplifies component placement and control. With the common cathode structure, the device supports separated power supplies for the red, green, and blue LEDs to achieve low power consumption. 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 device supports per-channel current from 0.2 mA to 20 mA, with typical 1% channel-to-channel current deviation and typical 1% 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 up to 32 cascaded devices. The device supports up to 50 MHz SCLK (external) and high refresh rate with maximum 160 MHz GCLK (internal). Meanwhile, the device integrates enhanced circuits and intelligent algorithms to solve the various display challenges in Narrow Pixel Pitch(NPP) LED display applications and mini or micro-LED products: dim at the fist scan line, upper and downside ghosting, non-uniformity in low grayscale, coupling, caterpillar caused by open or short LEDs, which make the LP5891 a perfect choice in such applications.

The LP5891 also implements LED open, weak short, short detection and removal during operations and can also report the accurate fault position information out to the accompanying digital processor.