LP5891 datasheet(23/69 Pages) TI

Part #	LP5891

Description	LP5891-Q1 Automotive 48 Current Sources, 64 Scans, Common Cathode LED Matrix Driver

PDF	69 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

Logo

23 / 69 page

Controller

LP5891-Q1

Step1: Send Read LSD_LINE_WARN command

Return LSD_LINE_WARN (FC18/FC19)

Step2: Send LSD_LINE_CMD (number y scan line)

Return the 48 channels LSD informa on(FC21) of number y scan line

Controller

checks FC18

and FC19,

nd the ‘1’

posi on,

suppose y.

LP5891-Q1

latches the short

detec on result

to FC21 while

scanning to

number y line

Step3: Send Read FC21 command

Figure 8-14. Steps to Read LED Short Information

8.3.5.4.3 LSD Caterpillar Removal

Figure 8-15 shows the LSD caterpillar issue caused by short LED. Suppose the LED0-1 is a short LED. When it

scans to the line1 and the OUT1 is turned off, the OUT1 voltage is the same with scan line0 voltage because of

the short path of the LED0-1. At this time, there is a current path from the line0 to the GND through the LED1-1

and SW1-1, which causes LED1-1 light unwanted.

www.ti.com

LP5891-Q1

SNVSC61A – AUGUST 2022 – REVISED DECEMBER 2022

Submit Document Feedback

Product Folder Links: LP5891-Q1

LP5891 Datasheet(PDF) 23 Page - Texas Instruments