High-current automotive LED matrix driver has PWM dimming and ultra-low-power

The Texas Instruments LP5892-Q1 is a highly integrated common cathode matrix LED display driver with 48 constant current sources and 16 scanning FETs. One device supports driving 16 × 16 RGB pixels, and two LP5892-Q1 devices support driving 32 × 32 RGB pixels. The device supports separated power supplies for the red, green, and blue LEDs by its common cathode structure to attain low power consumption. Also, the operation power of the driver is greatly reduced by ultra-low operation voltage range (Vcc down to 2.5V) and ultra-low operation current (Icc down to 3.6mA).

The driver implements a high-speed rising-edge transmission interface to support a high device count daisy-chained and high refresh rate while minimizing EMI. The device supports up to 50MHz SCLK (external) and up to 160MHz GCLK (internal). Also, the device incorporates improved circuits and intelligent algorithms to solve the various display challenges in NPP LED display applications and mini and micro-LED products: dim at the first scan line, upper and downside ghosting, non-uniformity in low grayscale, coupling, caterpillar induced by open or short LEDs, which make the device a perfect choice in such applications.

The LP5892-Q1 also implements LED open/weak short/short detections and removals throughout operations and can also report that information to the accompanying digital processor.