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Product details

Parameters

Channels (#) 3 LED current per channel (mA) 235 LED configuration Parallel Program memory Yes Programmable ramp control Yes Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Iout (Max) (A) 0.72 Iq (Typ) (mA) 1.6 Features I2C Control Shutdown current (Typ) (uA) 1 Peak efficiency (%) 95 Operating temperature range (C) -30 to 85 open-in-new Find other RGB LED drivers

Package | Pins | Size

WQFN (RTW) 24 16 mm² 4 x 4 open-in-new Find other RGB LED drivers

Features

  • Over-Current Protection
  • Over-Temperature Protection
  • I2C Compatible Interface
  • Under-Voltage Lockout
  • LED Open and Short Protection and Detection
  • 95% Peak Efficiency Buck-Boost Converter
  • NVM Memory for Calibration Data and Standalone Usage without I2C Control
  • Soft Start

Key Specifications

  • Integrated buck-boost Converter
  • Programmable LED Drivers
  • 700 mA Maximum Drive Current
  • ±6% Current Accuracy Over Temperature
  • 24-pin WQFN Package

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open-in-new Find other RGB LED drivers

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 driver output current settings can be stored to integrated non-volatile memory which allows stand-alone operation without I2C interface. Non-volatile memory is rewritable so current setting can be changed if needed.

The 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 I2C interface.

Total brightness can be controlled with PWM input or with master fader register if I2C interface is used.

open-in-new Find other RGB LED drivers
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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet LM3549 High Power Sequential LED Driver datasheet (Rev. A) May 03, 2013
White paper Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Application note How to Select a RGB LED Driver Aug. 08, 2019
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Technical articles Solving the automotive EMI issues in new cars with all the screens Sep. 10, 2014
User guide AN-2062 LM3549 Evaluation Kit (Rev. A) Apr. 30, 2013

Design & development

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Hardware development

EVALUATION BOARD Download
LM3549 Evaluation Module
LM3549SQEVNOPB
149
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 driver output current (...)

Features
  • Over Current Protection
  • Over Temperature Protection
  • I2C Compatible Interface
  • Under-Voltage Lockout
  • LED Open and Short Protection

Design tools & simulation

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PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
WQFN (RTW) 24 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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