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LP5891 Datasheet(PDF) 20 Page - Texas Instruments

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Part # LP5891
Description  LP5891 48 Current Sources, 64 Scans, Common Cathode LED Matrix Driver
PDF  74 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LP5891 Datasheet(HTML) 20 Page - Texas Instruments

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Figure 7-10. Steps to Read LED Open Information
7.3.5.3.3 LED Open Caterpillar Removal
Figure 7-11 shows the caterpillar issue caused by open LED. Suppose the LED0-1 is an open LED. When line 0
is chosen and the OUT1 is turned on, the OUT1 voltage is forced to approach to VLED because of the broken
path of the current source. However, the voltage of the un-chosen lines are below the Vclamp which is much
lower than VLED, causing all LEDs which connect to the channel OUT1, light unwanted.
LP5891
SLDS269A – MARCH 2022 – REVISED MAY 2022
www.ti.com
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