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LP5522 Datasheet(PDF) 6 Page - Texas Instruments

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Part # LP5522
Description  Programmable LED Driver
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP5522 Datasheet(HTML) 6 Page - Texas Instruments

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LP5522
SNVS488 – JUNE 2007
www.ti.com
TRAINING: In Training mode new blinking sequence can be programmed. LED output follows CTRL signal
during the programming
TSD: If chip temperature rises above 160°C (typ.) device goes into Thermal Shut Down (TSD) mode. In TSD
mode output is disabled but supporting functions are on.
LED Driver Operational Description
The LP5522 LED driver is constant current source. Current can be set with external resistor (RISET) so that the
current ratio between resistor and LED is 1:400. RISET current correlates to ISET reference voltage (VISET).
Consequently, current through LED can be adjusted using equation IOUT = 480/RISET.
Use of external resistor is optional. If external resistor is not connected, default output current is 5 mA. When
external resistor is not used ISET pin should be connected to VDD.
6
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Copyright © 2007, Texas Instruments Incorporated
Product Folder Links: LP5522


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