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LM3549

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高功率顺序驱动 LED 驱动器

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LM3549

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产品详情

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 x 4
  • 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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类型 标题 下载最新的英语版本 日期
* 数据表 LM3549 High Power Sequential LED Driver 数据表 (Rev. A) 2013年 5月 3日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日
应用手册 How to Select a RGB LED Driver 2019年 8月 8日
用户指南 AN-2062 LM3549 Evaluation Kit (Rev. A) 2013年 4月 30日

设计和开发

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评估板

LM3549SQEVNOPB — LM3549 评估模块

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 (...)

用户指南: PDF
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封装 引脚 下载
WQFN (RTW) 24 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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