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LM36923

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高效三串 30V 同步白光 LED 驱动器

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数据表

LM36923

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数据表 立即订购

产品详情

Number of channels 3 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 29.5 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 92 Topology Boost Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, Enable/Shutdown, I2C control, OVP, PWM control, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 3 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 29.5 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 92 Topology Boost Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, Enable/Shutdown, I2C control, OVP, PWM control, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YFF) 12 2.52000000000000018 mm² (— mm × — mm)
  • 1% Matched Current Sinks Across (Process, Voltage, Temp)
  • 3% Current Sink Accuracy Across (Process, Voltage, Temp)
  • 11-Bit Dimming Resolution
  • Up to 91.6% Solution Efficiency
  • Drives from One to Three Parallel LED Strings at up to 28 V
  • PWM Dimming Input
  • I2C Programmable
  • Selectable 500-kHz and 1-MHz Switching Frequency with Optional –12% shift
  • Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
  • Four Configurable Overvoltage Protection Thresholds (17 V, 21 V, 25 V, 29 V)
  • Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA, 1500 mA)
  • Thermal Shutdown Protection
  • 1% Matched Current Sinks Across (Process, Voltage, Temp)
  • 3% Current Sink Accuracy Across (Process, Voltage, Temp)
  • 11-Bit Dimming Resolution
  • Up to 91.6% Solution Efficiency
  • Drives from One to Three Parallel LED Strings at up to 28 V
  • PWM Dimming Input
  • I2C Programmable
  • Selectable 500-kHz and 1-MHz Switching Frequency with Optional –12% shift
  • Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
  • Four Configurable Overvoltage Protection Thresholds (17 V, 21 V, 25 V, 29 V)
  • Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA, 1500 mA)
  • Thermal Shutdown Protection

The LM36923 is an ultra-compact, highly efficient, threestring white-LED driver designed for LCD display backlighting. The device can power up to 8 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.

The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies and noise-free operation.

The device operates over the 2.5-V to 5.5-V input voltage range and -40°C to 85°C temperature range.

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

The LM36923 is an ultra-compact, highly efficient, threestring white-LED driver designed for LCD display backlighting. The device can power up to 8 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.

The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies and noise-free operation.

The device operates over the 2.5-V to 5.5-V input voltage range and -40°C to 85°C temperature range.

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

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LM36922 正在供货 高效双串 30V 同步白光 LED 驱动器 This product is a 3 string backlight driver with 11-bits of exponential dimming.

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 LM36923 Highly Efficient Triple-String White LED Driver 数据表 (Rev. A) PDF | HTML 2016-10-7
应用手册 How to use the LM3697 Device to Design a Backlight Unit in a Smartphone PDF | HTML 2021-4-15
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
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 Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight 2016-10-14
应用手册 Schottky Diode Selection in Asynchronous Boost Converters 2016-9-6

设计与开发

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评估板

LM36923EVM — LM36923EVM 高效三灯串白光 LED 驱动器 EVM

LM36923 评估模块 (LM36923EVM) 旨在全面评估 LM36923 高效三灯串白光 LED 背光驱动器。  LM36923EVM 包含 LM36923，具有 3p8s 白光 LED 灯串，并带有跳线，可实现 1p2s 至 3p8s LED 灯串配置。  通过在各 LED 灯串中测量 10 欧姆电阻两端的压降可验证 LED 灯串电流。  该评估套件附带 USB2ANY 接口和 GUI，可直接用于评估。

用户指南: PDF
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评估模块 (EVM) 用 GUI

SNVC167 — LM36923EVM/LM36922EVM GUI Software

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

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