Inicio Administración de potencia Controladores LED Drivers LED RGB
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Administración de potencia
Controladores LED
Drivers LED RGB

LM3549

ACTIVO

Controlador LED secuencial de alta potencia

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LM3549

ACTIVO
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Detalles del producto

Number of channels 3 LED current per channel (mA) 235 LED configuration Parallel Program memory Yes Topology Boost Programmable ramp control Yes Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 0.72 Features I2C control Iq (typ) (mA) 1.6 Shutdown current (ISD) (typ) (µA) 1 Operating temperature range (°C) -30 to 85 Rating Catalog
Number of channels 3 LED current per channel (mA) 235 LED configuration Parallel Program memory Yes Topology Boost Programmable ramp control Yes Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 0.72 Features I2C control Iq (typ) (mA) 1.6 Shutdown current (ISD) (typ) (µA) 1 Operating temperature range (°C) -30 to 85 Rating Catalog
WQFN (RTW) 24 16 mm² (4 mm × 4 mm)
  • 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM3549 High Power Sequential LED Driver datasheet (Rev. A) 3/05/2013
Informe Common LED Functions and LED Driver Design Considerations 21/09/2020
Nota sobre la aplicación How to Select a RGB LED Driver 8/08/2019
EVM User's guide AN-2062 LM3549 Evaluation Kit (Rev. A) 30/04/2013

Diseño y desarrollo

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Placa de evaluación

LM3549SQEVNOPB — Módulo de evaluación LM3549

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 (...)

Guía del usuario: PDF
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