主页 电源管理 LED 驱动器 背光 LED 驱动器

LM3509

正在供货

用于白光 LED 和/或 OLED 显示屏的高效升压,具有双路电流阱

产品详情

Number of channels 2 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 21 Type Inductive Switching frequency (max) (kHz) 1250 Duty cycle (max) (%) 90 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features I2C control Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 2 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 21 Type Inductive Switching frequency (max) (kHz) 1250 Duty cycle (max) (%) 90 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features I2C control Operating temperature range (°C) -40 to 85 Rating Catalog
WSON (DSC) 10 9 mm² 3 x 3
  • Integrated OLED Display Power Supply and LED Driver
  • Drives up to 10 LED’s at 30mA
  • Drives up to 5 LED’s at 20mA and Delivers up to 21V at 40mA
  • Over 90% Efficient
  • 32 Exponential Dimming Steps
  • 0.15% Accurate Current Matching Between Strings
  • Internal Soft-Start Limits Inrush Current
  • True Shutdown Isolation for LED’s
  • Wide 2.7V to 5.5V Input Voltage Range
  • 21V Over-Voltage Protection
  • 1.27MHz Fixed Frequency Operation
  • Low Profile 10-Pin WSON Package (3mm x 3mm x 0.8mm)
  • General Purpose I/O
  • Active Low Hardware Reset

All trademarks are the property of their respective owners.

  • Integrated OLED Display Power Supply and LED Driver
  • Drives up to 10 LED’s at 30mA
  • Drives up to 5 LED’s at 20mA and Delivers up to 21V at 40mA
  • Over 90% Efficient
  • 32 Exponential Dimming Steps
  • 0.15% Accurate Current Matching Between Strings
  • Internal Soft-Start Limits Inrush Current
  • True Shutdown Isolation for LED’s
  • Wide 2.7V to 5.5V Input Voltage Range
  • 21V Over-Voltage Protection
  • 1.27MHz Fixed Frequency Operation
  • Low Profile 10-Pin WSON Package (3mm x 3mm x 0.8mm)
  • General Purpose I/O
  • Active Low Hardware Reset

All trademarks are the property of their respective owners.

The LM3509 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED’s. The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels.

All trademarks are the property of their respective owners.

When configured as a dual output white LED bias supply, the LM3509 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation. The maximum current per output is set via a single external low power resistor. An I2C compatible interface allows for independent adjustment of the LED current in either output from 0 to max current in 32 exponential steps. When configured as a white LED + OLED bias supply the LM3509 can independently and simultaneously drive a string of up to 5 white LED’s and deliver a constant output voltage of up to 21V for OLED panels.

Output over-voltage protection shuts down the device if VOUT rises above 21V allowing for the use of small sized low voltage output capacitors. The LM3509 is offered in a small 10-pin thermally- enhanced WSON package and operates over the -40°C to +85°C temperature range.

The LM3509 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED’s. The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels.

All trademarks are the property of their respective owners.

When configured as a dual output white LED bias supply, the LM3509 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation. The maximum current per output is set via a single external low power resistor. An I2C compatible interface allows for independent adjustment of the LED current in either output from 0 to max current in 32 exponential steps. When configured as a white LED + OLED bias supply the LM3509 can independently and simultaneously drive a string of up to 5 white LED’s and deliver a constant output voltage of up to 21V for OLED panels.

Output over-voltage protection shuts down the device if VOUT rises above 21V allowing for the use of small sized low voltage output capacitors. The LM3509 is offered in a small 10-pin thermally- enhanced WSON package and operates over the -40°C to +85°C temperature range.

下载 观看带字幕的视频 视频

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 5
类型 标题 下载最新的英语版本 日期
* 数据表 HE Boost for White LED's / OLED Displays w/ Dual Sinks & I2C Brightness Control 数据表 (Rev. D) 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
技术文章 How energy harvesting can extend the life of your fault indicator on the grid PDF | HTML 2017年 10月 18日
应用手册 Analog PWM Dimming in White-LED Drivers 2016年 12月 21日
EVM 用户指南 AN-1594 LM3509 Evaluation Board (Rev. A) 2013年 4月 30日

设计和开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

评估板

LM3509SDEV — LM3509SD 评估板

The LM3509 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED's. The second outut (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output (...)

用户指南: PDF
TI.com 上无现货
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
参考设计

TIDA-00998 — 适用于高架故障指示灯的能量收集和故障指示灯子系统参考设计

此参考设计展示了多个架构,这些架构可利用从电流互感器 (CT) 或太阳能电池收集能量的二次电池或超级电容器来延长原电池寿命。利用高效的 LED 驱动器来驱动 LED 串联或并联灯串,以控制光亮强度,实现 360° 均匀一致的能见度,从而进行更好的电源管理。
设计指南: PDF
原理图: PDF
封装 引脚 下载
WSON (DSC) 10 查看选项

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

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持和培训

视频