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LM3530

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具有可编程环境光感应功能的高效白光 LED 驱动器

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数据表

LM3530

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产品详情

Number of channels 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 500 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features I2C control Operating temperature range (°C) -30 to 85 Rating Catalog
Number of channels 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 500 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 88 Topology Boost Features I2C control Operating temperature range (°C) -30 to 85 Rating Catalog
DSBGA (YFQ) 12 2.52000000000000018 mm² (— mm × — mm) DSBGA (YFZ) 12 2.52000000000000018 mm² (— mm × — mm)
  • Drives up to 11 LEDs in series
  • 1000:1 Dimming Ratio
  • 90% Efficient
  • Programmable Dual Ambient Light Sensor Inputs
    with Internal ALS Voltage Setting Resistors
  • I2C Programmable Logarithmic or
    Linear Brightness Control
  • External PWM Input for Simple Brightness
    Adjustment
  • True Shutdown Isolation for LEDs and Ambient
    Light Sensors
  • Internal Soft-Start Limits Inrush Current
  • Wide 2.7-V to 5.5-V Input Voltage Range
  • 40-V and 25-V Overvoltage Protection Options
  • 500-kHz Fixed Frequency Operation
  • 839-mA Peak Current Limit
  • Drives up to 11 LEDs in series
  • 1000:1 Dimming Ratio
  • 90% Efficient
  • Programmable Dual Ambient Light Sensor Inputs
    with Internal ALS Voltage Setting Resistors
  • I2C Programmable Logarithmic or
    Linear Brightness Control
  • External PWM Input for Simple Brightness
    Adjustment
  • True Shutdown Isolation for LEDs and Ambient
    Light Sensors
  • Internal Soft-Start Limits Inrush Current
  • Wide 2.7-V to 5.5-V Input Voltage Range
  • 40-V and 25-V Overvoltage Protection Options
  • 500-kHz Fixed Frequency Operation
  • 839-mA Peak Current Limit

The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.

The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.

The LM3530 operates over the −40°C to 85°C temperature range.

The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.

The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.

The LM3530 operates over the −40°C to 85°C temperature range.
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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM3530 High-Efficiency White-LED Driver with Programmable Ambient Light Sensing Capability and I2C-Compatible Interface 数据表 (Rev. L) PDF | HTML 2014-12-23
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020-9-21
选择指南 电源管理指南 2018 2018-7-31
应用手册 Analog PWM Dimming in White-LED Drivers 2016-12-21
应用手册 Inductor Selection in Boost Converters for LCD Backlight Applications 2016-10-24
应用手册 Schottky Diode Selection in Asynchronous Boost Converters 2016-9-6
用户指南 AN-1991 LM3530 Evaluation Kit (Rev. A) 2013-4-30

设计与开发

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）。

驱动程序或库

LM3530SW-LINUX — LM3530SW-LINUX

The Linux driver supports the LM3530 White LED Driver. 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:

  • lm3530

 

Linux Source Files

The files (...)

支持的产品和硬件
评估模块 (EVM) 用 GUI

SNVC045 — LM3530 Graphical User Interface

支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
DSBGA (YFQ) 12 Ultra Librarian
DSBGA (YFZ) 12 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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