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LM3435

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具有 IC 控制接口的紧凑型顺序模式 RGB LED 驱动器

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LM3435

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产品详情

Number of channels 3 LED current per channel (mA) 2000 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 2 Features I2C control Iq (typ) (mA) 5 Shutdown current (ISD) (typ) (µA) 8 Operating temperature range (°C) -40 to 125 Rating Catalog
Number of channels 3 LED current per channel (mA) 2000 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 2 Features I2C control Iq (typ) (mA) 5 Shutdown current (ISD) (typ) (µA) 8 Operating temperature range (°C) -40 to 125 Rating Catalog
WQFN (RSB) 40 25 mm² 5 x 5
  • Sequential RGB Driving Mode
  • Low Component Count and Small Solution Size
  • Stable with Ceramic and Other Low ESR capacitors, No Loop Compensation Required
  • Fast Transient Response
  • Programmable Converter Switching Frequency up to 1 MHz
  • MCU Interface Ready With I2C Bus
  • Peak Current Limit Protection for the Switcher
  • LED Fault Detection and Reporting via I2C Bus

Key Specifications

  • Support up to 2A LED current
  • Typical ±3% LED current accuracy
  • Integrated N-Channel main and P-Channel synchronous MOSFETs
  • 3 Integrated N-Channel current regulating pass switches
  • LED Currents programmable via I2C bus independently
  • Input voltage range: 2.7 – 5.5 V
  • Thermal shutdown
  • Thermally enhanced WQFN package

All trademarks are the property of their respective owners.

  • Sequential RGB Driving Mode
  • Low Component Count and Small Solution Size
  • Stable with Ceramic and Other Low ESR capacitors, No Loop Compensation Required
  • Fast Transient Response
  • Programmable Converter Switching Frequency up to 1 MHz
  • MCU Interface Ready With I2C Bus
  • Peak Current Limit Protection for the Switcher
  • LED Fault Detection and Reporting via I2C Bus

Key Specifications

  • Support up to 2A LED current
  • Typical ±3% LED current accuracy
  • Integrated N-Channel main and P-Channel synchronous MOSFETs
  • 3 Integrated N-Channel current regulating pass switches
  • LED Currents programmable via I2C bus independently
  • Input voltage range: 2.7 – 5.5 V
  • Thermal shutdown
  • Thermally enhanced WQFN package

All trademarks are the property of their respective owners.

The LM3435, a Synchronously Rectified non-isolated Flyback Converter, features all required functions to implement a highly efficient and cost effective RGB LED driver. Different from conventional Flyback converter, LEDs connect across the VOUT pin and the VIN pin through internal passing elements at corresponding LED pins. Thus, voltage across LEDs can be higher than, equal to or lower than the input supply voltage.

Load current to LEDs is up to 2A with voltage across LEDs ranging from 2.0V to 4.5V. Integrated N-Channel main MOSFET, P-Channel synchronous MOSFET and three N-Channel current regulating pass switches allow low component count, thus reducing complexity and minimize board size. The LM3435 is designed to work exceptionally well with ceramic output capacitors with low output ripple voltage. Loop compensation is not required resulting in a fast load transient response. Non-overlapping RGB LEDs are driven sequentially through individual control. Output voltage hence can be optimized for different forward voltage of LEDs during the non-overlapping period. I2C interface eases the programming of the individual RGB LED current up to 1,024 levels per channel.

The LM3435 is available in the thermally enhanced 40-pin WQFN package.

The LM3435, a Synchronously Rectified non-isolated Flyback Converter, features all required functions to implement a highly efficient and cost effective RGB LED driver. Different from conventional Flyback converter, LEDs connect across the VOUT pin and the VIN pin through internal passing elements at corresponding LED pins. Thus, voltage across LEDs can be higher than, equal to or lower than the input supply voltage.

Load current to LEDs is up to 2A with voltage across LEDs ranging from 2.0V to 4.5V. Integrated N-Channel main MOSFET, P-Channel synchronous MOSFET and three N-Channel current regulating pass switches allow low component count, thus reducing complexity and minimize board size. The LM3435 is designed to work exceptionally well with ceramic output capacitors with low output ripple voltage. Loop compensation is not required resulting in a fast load transient response. Non-overlapping RGB LEDs are driven sequentially through individual control. Output voltage hence can be optimized for different forward voltage of LEDs during the non-overlapping period. I2C interface eases the programming of the individual RGB LED current up to 1,024 levels per channel.

The LM3435 is available in the thermally enhanced 40-pin WQFN package.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM3435 Compact Sequential Mode RGB LED Driver with I 2 C Control Interface 数据表 (Rev. C) 2013年 5月 2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 AN-1656 Design Challenges of Switching LED Drivers (Rev. A) 2013年 5月 3日
用户指南 AN-2196 LM3435 Evaluation Board (Rev. A) 2013年 5月 3日
应用手册 Application Note 1656 Design Challenges of Switching LED Drivers (cn) 最新英语版本 (Rev.A) 2007年 10月 18日

设计和开发

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评估板

LM3435EVAL — Pico 投影仪 LED 驱动器评估板

The LM3435 Evaluation Board has been designed for evaluating the performance of the device in a typical pico projector application. The end user can interface his own system to the evaluation board to test out the performance of the system. With LM3435, the system requires only single DC-DC (...)

用户指南: PDF
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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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