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LM36923H

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高效三灯串白光 LED 驱动器

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数据表

LM36923H

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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) 37 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 92 LED current per channel (mA) 30 Peak efficiency (%) 92 Topology Boost, Current Sink, Multi-Channel Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, Enable/Shutdown, I2C control, OVP, 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) 37 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 92 LED current per channel (mA) 30 Peak efficiency (%) 92 Topology Boost, Current Sink, Multi-Channel Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, Enable/Shutdown, I2C control, OVP, 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, Temperature
  • 3% Current-Sink Accuracy Across Process, Voltage, Temperature
  • 11-Bit Dimming Resolution
  • Up to 90% Solution Efficiency
  • Drives from One to Three Parallel LED Strings at up to 38 V at 25 mA per String
  • 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, 24 V, 31 V, 38 V)
  • Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA,
    1500 mA)
  • Thermal Shutdown Protection
  • Externally Selectable I2C Address Options via ASEL Input
  • 1% Matched Current Sinks Across Process, Voltage, Temperature
  • 3% Current-Sink Accuracy Across Process, Voltage, Temperature
  • 11-Bit Dimming Resolution
  • Up to 90% Solution Efficiency
  • Drives from One to Three Parallel LED Strings at up to 38 V at 25 mA per String
  • 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, 24 V, 31 V, 38 V)
  • Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA,
    1500 mA)
  • Thermal Shutdown Protection
  • Externally Selectable I2C Address Options via ASEL Input

The LM36923H is an ultra-compact, highly efficient, three-string white-LED driver designed for LCD display backlighting. The device can power up to 12 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 with noise-free operation from 50 µA to 25 mA.

Other features include an auto-frequency mode, which can automatically change the frequency based on load current in order to optimize efficiency.

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

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

The LM36923H is an ultra-compact, highly efficient, three-string white-LED driver designed for LCD display backlighting. The device can power up to 12 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 with noise-free operation from 50 µA to 25 mA.

Other features include an auto-frequency mode, which can automatically change the frequency based on load current in order to optimize efficiency.

The device operates over the 2.5-V to 5.5-V input voltage range and a –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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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 LM36923H Highly Efficient Triple-String White LED Driver 数据表 (Rev. B) PDF | HTML 2016-10-7
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 Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight 2016-10-14

设计与开发

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评估板

LM36922EVM — LM36922 高效双灯串白光 LED 驱动器评估模块

LM36922 评估模块 (LM36922EVM) 旨在全面评估 LM36922 高效双灯串白光 LED 背光驱动器。  LM36922EVM 包含 LM36922，具有 2p8s 白光 LED 灯串，并带有跳线，可实现 1p2s 至 2p8s 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
支持的产品和硬件
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评估板

LM36923HEVM — LM36923H 高效三灯串白光 LED 驱动器评估模块

LM36923H 评估模块 (LM36923HEVM) 旨在全面评估 LM36923H 高效三灯串白光 LED 背光驱动器。LM36923HEVM 由 LM36923H 以及三灯串白光 LED（每串含13 个 LED）组成。配置跳线提供各种 LED 灯串配置。可在各 LED 灯串中测量 10Ω 电阻的压降来验证 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
支持的产品和硬件
有库存
限制：
??asset.out-of-stock-ti_zh_CN??
无货
评估模块 (EVM) 用 GUI

SNVC193 — LM36923HEVM/LM36922HEVM 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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