LP5522

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SNVS488 – JUNE 2007

LED Driver Typical Performance Characteristics

Output Current vs Input Voltage

(ISET Connected To VDD)

Output Current vs Headroom Voltage

Line Regulation

LED Startup

Control Interface Operational Description

LP5522 has one digital control input, CTRL. Threshold levels of CTRL input are fixed to enable control from low

voltage controller. CTRL signal is used to control the mode of the circuit. A rising edge of the CTRL signal

activates the circuit and starts a command entering period. During the command entering period all rising edges

are counted. After command entering period there is a blank period when no rising edges are allowed. If CTRL is

left high after command entering period, the consequent command is performed right after the blank period.

Note that timing diagrams are not on scale!

Copyright © 2007, Texas Instruments Incorporated

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Product Folder Links: LP5522