Automotive 48 x 16 matrix LED driver with 16-bits pulse width modulation dimming

The LP5891-Q1 is a

highly integrated, common-cathode LED matrix driver with 48 constant current sources

and 16 scanning FETs. The LP5891-Q1 implements a high

speed rising-edge transmission interface to support high device

count daisy-chained while minimizing electrical-magnetic interference (EMI) and

internal GCLK rate ranges from 40 MHz to 160 MHz. The device also implements LED

open/weak-short/short detections and removals during operations.

The LP5891-Q1 is a

highly integrated common cathode matrix LED display driver with 48 constant current sources

and 16 scanning FETs. Besides driving 16 × 16 and 32 × 32 RGB LED pixels as LP5890, three

LP5891-Q1 devices are capable of driving 48 × 48 RGB LED pixels

and stacking four LP5891-Q1 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-Q1 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-Q1 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 device

supports up to 50-MHz SCLK (external) and up to 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 and micro-LED products: dim at the first scan line, upper and downside ghosting,

non-uniformity in low grayscale, coupling, caterpillar caused by open or short LEDs, which

make the LP5891-Q1 a perfect choice in such applications.

The LP5891-Q1 also implements LED open/weak

short/short detections and removals during operations and can also report those information

out to the accompanying digital processor.