Texas Instruments LM3549 Evaluation Board LM3549SQEV/NOPB LM3549SQEV/NOPB Manuale Utente
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LM3549SQEV/NOPB
User's Guide
SNVA443A – August 2010 – Revised April 2013
AN-2062 LM3549 Evaluation Kit
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General Description
The LM3549 is a high power LED driver with up to 700mA output current. It has three constant current
LED drivers and a buck boost SMPS for driving RGB LEDs with high efficiency. LED drivers are designed
for sequential drive so only one driver can be enabled at a time.
LED drivers and a buck boost SMPS for driving RGB LEDs with high efficiency. LED drivers are designed
for sequential drive so only one driver can be enabled at a time.
LED driver output current settings can be stored to integrated non-volatile memory which allows stand-
alone operation without I
alone operation without I
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C interface. Non-volatile memory is re-writable so current setting can be changed
if needed.
LM3549 has a fault detection feature that can detect several different fault conditions. In case of a fault
error flags are set and FAULT output sends interrupt to control logic. Error flags can be read through I
error flags are set and FAULT output sends interrupt to control logic. Error flags can be read through I
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C
interface.
Total brightness can be controlled with PWM input or with master fader register if I
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C interface is used.
LM3549 evaluation board is designed to help getting familiarized with the LM3549. It can be used to
measure key parameters of the LM3549 and to speed up design in of the device. The evaluation board
has a microcontroller that acts as an USB to I
measure key parameters of the LM3549 and to speed up design in of the device. The evaluation board
has a microcontroller that acts as an USB to I
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C interface. Microcontroller is also used to manipulate the
digital control signals of the LM3549. LM3549 evaluation board can be powered from the USB interface or
from external power supply. If evaluation board is used to measure the electrical parameters of the
LM3549 or used with high output currents external power supply needs to be used. If evaluation board is
used to check the functionality of the LM3549 with small output currents or to support software
development it can be powered directly from USB interface. This document describes how to get the
LM3549 evaluation board up and running and how to use evaluation software.
from external power supply. If evaluation board is used to measure the electrical parameters of the
LM3549 or used with high output currents external power supply needs to be used. If evaluation board is
used to check the functionality of the LM3549 with small output currents or to support software
development it can be powered directly from USB interface. This document describes how to get the
LM3549 evaluation board up and running and how to use evaluation software.
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What Is Needed
To get started you will need:
•
LM3549 evaluation board
•
LM3549 evaluation software (LM3549.exe)
•
USB cable
•
PC with one free USB port
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SNVA443A – August 2010 – Revised April 2013
AN-2062 LM3549 Evaluation Kit
Copyright © 2010–2013, Texas Instruments Incorporated