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LM3554

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具有 1.2A 双通道高侧 LED 驱动器和 I2C 兼容接口的同步升压转换器

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LM3554

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产品详情

Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.2 Iq (typ) (mA) 0.63 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 2 Rating Catalog
Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.2 Iq (typ) (mA) 0.63 Features I2C control Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 2 Rating Catalog
DSBGA (YFQ) 16 3.24 mm² 1.8 x 1.8
  • Input Voltage: 2.5 V to 5.5 V
  • Programmable 4.5-V or 5-V Constant Output Voltage
  • Dual High-Side Current Sources
  • Grounded Cathode Allowing for Better Heat Sinking and LED Routing
  • > 90% Efficiency
  • Ultra-Small Solution Size: < 23 mm2
  • Four Operating Modes: Torch, Flash, LED Indicator, and Voltage Output
  • Accurate and Programmable LED Current from 37.5 mA to 1.2 A
  • Hardware Flash and Torch Enable
  • LED Thermal Sensing and Current Scaleback
  • Software Selectable Input Voltage Monitor
  • Programmable Flash Timeout
  • Dual Synchronization Inputs for RF Power-Amplifier Pulse Events
  • Open and Short LED Detection
  • Active High Hardware Enable for Protection Against System Faults
  • 400-kHz I2C-Compatible Interface
  • Input Voltage: 2.5 V to 5.5 V
  • Programmable 4.5-V or 5-V Constant Output Voltage
  • Dual High-Side Current Sources
  • Grounded Cathode Allowing for Better Heat Sinking and LED Routing
  • > 90% Efficiency
  • Ultra-Small Solution Size: < 23 mm2
  • Four Operating Modes: Torch, Flash, LED Indicator, and Voltage Output
  • Accurate and Programmable LED Current from 37.5 mA to 1.2 A
  • Hardware Flash and Torch Enable
  • LED Thermal Sensing and Current Scaleback
  • Software Selectable Input Voltage Monitor
  • Programmable Flash Timeout
  • Dual Synchronization Inputs for RF Power-Amplifier Pulse Events
  • Open and Short LED Detection
  • Active High Hardware Enable for Protection Against System Faults
  • 400-kHz I2C-Compatible Interface

The LM3554 is a 2-MHz fixed-frequency, current-mode synchronous boost converter. The device is designed to operate as a dual 600-mA (1.2 A total) constant-current driver for high-current white LEDs, or as a regulated 4.5-V or 5-V voltage source.

The main features include: an I2C-compatible interface for controlling the LED current or the desired output voltage, a hardware flash enable input for direct triggering of the flash pulse, and dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.

Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to limit the output voltage during LED open circuits, and an output short circuit protection which limits the output current during shorts to GND.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM3554 is a 2-MHz fixed-frequency, current-mode synchronous boost converter. The device is designed to operate as a dual 600-mA (1.2 A total) constant-current driver for high-current white LEDs, or as a regulated 4.5-V or 5-V voltage source.

The main features include: an I2C-compatible interface for controlling the LED current or the desired output voltage, a hardware flash enable input for direct triggering of the flash pulse, and dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.

Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to limit the output voltage during LED open circuits, and an output short circuit protection which limits the output current during shorts to GND.

For all available packages, see the orderable addendum at the end of the data sheet.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM3554 Synchronous Boost Converter With 1.2-A Dual High-Side LED Drivers and I2C-Compatible Interface 数据表 (Rev. C) PDF | HTML 2016年 2月 26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
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
用户指南 AN-1742 LM3554 Evaluation Board (Rev. B) 2013年 7月 23日

设计和开发

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评估板

LM3554TMEEV — 用于 LM3544 的评估板

Synchronous Boost Converter with 1.2A Dual High Side LED Drivers and I2C-Compatible Interface

用户指南: PDF
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驱动程序或库

LM355XSW-LINUX — 用于 LM355X 的 Linux 驱动程序

The Linux driver supports the LM355X series of LED Drivers. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • lm3554
  • lm3556

 

Linux Source Files

(...)

View Options
评估模块 (EVM) 用 GUI

SNVC046 — LM3554 Graphical User Interface

支持的产品和硬件

支持的产品和硬件

产品
照明 LED 驱动器
  • LM3554 — 具有 1.2A 双通道高侧 LED 驱动器和 I2C 兼容接口的同步升压转换器
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封装 引脚 CAD 符号、封装和 3D 模型
DSBGA (YFQ) 16 Ultra Librarian
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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

支持和培训

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