Texas Instruments AN-1502 LP5526 User Manual

1 General Description
The LP5526 is a Lighting Management Unit for portable applications. It can be used to drive display
backlight, keypad LEDs, color LEDs and Flash LEDs. The device can drive 2 separately connected strings
of LEDs with high voltage boost converter. The RGB driver allows driving either individual color LEDs or
RGB LED from separate supply voltage, or it can be used to drive FLASH LEDs.
The MAIN and SUB outputs are high-resolution current mode drivers. RGB outputs can be used in switch
mode and current mode. PWM control can be used for any selected outputs.
The device is controlled through 2-wire low voltage I
required connections.
LP5526 is offered in a tiny DSBGA-25 package (2.54 mm × 2.54 mm).
2 Evaluation Kit Overview
LP5526 Evaluation Kit is based on a modular system, where the actual evaluation board is plugged on top
of the PC interface board, see
The kit supports complete functional evaluation of the circuit. The evaluation kit consists of:
• LP5526 evaluation board
• USB interface board
• USB interface cable
• CD including:
– Evaluation software for PC
– LP5526 datasheet
– LP5526 application note
– MicroSMD package application note AN1112
– PCB design application note AN1149
– Evaluation kit document (this document)
3 Evaluation Software
LP5526 evaluation software and some support files are supplied on the delivery CD together with all
available documentation regarding the circuit. You can copy the software and the files to your PC's hard
disk. The program and the support files must be in the same folder. The software is started by double-
clicking its icon. The software does not require any installation.
The evaluation software is organized in tabs according to the main functions of the chip. On the left side of
the tabs is shown the whole register map of LP5526. Below the tabs are shown the registers, which are
affected by the selected tab. Both register displays reflect immediately the changes you make by clicking
the selection boxes or sliders in the tabs. The contents of the tabs should be mostly self-explanatory.
Some example register settings are included in the delivery CD and they can be loaded from the
File/Open menu. You can similarly save your own settings.
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SNVA177B – January 2007 – Revised April 2013
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AN-1502 LP5526 Evaluation Kit
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C compatible interface that reduces the number of
Figure 1. The interface operates through the USB port.
Copyright © 2007–2013, Texas Instruments Incorporated
User's Guide
SNVA177B – January 2007 – Revised April 2013
AN-1502 LP5526 Evaluation Kit
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