产品详细信息

Input voltage (type) DC/DC Topology Boost, Boost Controller, Buck-Boost Vin (Min) (V) 4.5 Vin (Max) (V) 75 Iout (Max) (A) 5 Iq (Typ) (mA) 1.6 Features Adjustable Switch Frequency, Enable/Shutdown, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
Input voltage (type) DC/DC Topology Boost, Boost Controller, Buck-Boost Vin (Min) (V) 4.5 Vin (Max) (V) 75 Iout (Max) (A) 5 Iq (Typ) (mA) 1.6 Features Adjustable Switch Frequency, Enable/Shutdown, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
HTSSOP (PWP) 14 22 mm² 5 x 4.4
  • LM3429-Q1 is AEC-Q100 Grade 1 Qualified for
    Automotive Applications
  • VIN Range From 4.5 V to 75 V
  • Adjustable Current Sense Voltage
  • High-Side Current Sensing
  • 2-Ω, 1-A Peak MosFET Gate Driver
  • Input Undervoltage Protection
  • Overvoltage Protection
  • PWM Dimming
  • Analog Dimming
  • Cycle-by-Cycle Current Limit
  • Programmable Switching Frequency
  • Low Profile 14-lead HTSSOP Package
  • Thermal Shutdown
  • LM3429-Q1 is AEC-Q100 Grade 1 Qualified for
    Automotive Applications
  • VIN Range From 4.5 V to 75 V
  • Adjustable Current Sense Voltage
  • High-Side Current Sensing
  • 2-Ω, 1-A Peak MosFET Gate Driver
  • Input Undervoltage Protection
  • Overvoltage Protection
  • PWM Dimming
  • Analog Dimming
  • Cycle-by-Cycle Current Limit
  • Programmable Switching Frequency
  • Low Profile 14-lead HTSSOP Package
  • Thermal Shutdown

The LM3429 is a versatile high voltage N-channel MosFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of applications.

Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3429 uses Predictive Off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.

The LM3429 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions. Additional features include analog dimming, PWM dimming, overvoltage protection, undervoltage lock-out, cycle-by-cycle current limit, and thermal shutdown.

The LM3429 is a versatile high voltage N-channel MosFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of applications.

Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3429 uses Predictive Off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.

The LM3429 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions. Additional features include analog dimming, PWM dimming, overvoltage protection, undervoltage lock-out, cycle-by-cycle current limit, and thermal shutdown.

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TPS92691 正在供货 具有轨至轨电流感应放大器的 TPS92691 多拓扑 LED 驱动器 This product is a multi-topology low-side NFET LED controller with rail-to-rail current sense capability.

技术文档

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类型 项目标题 下载最新的英语版本 日期
* 数据表 LM3429/-Q1 N-Channel Controller for Constant Current LED Drivers 数据表 (Rev. H) PDF | HTML 2014年 11月 4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
技术文章 Here's how body electronics and lighting technology are changing the driving experience 2016年 9月 26日
技术文章 LED brightness adjustment: high-frequency PWM dimming 2016年 8月 26日
技术文章 Driving LEDs: topology matters 2016年 2月 26日
技术文章 Take better selfies with innovative LED flashes 2014年 11月 18日
应用手册 AN-1656 Design Challenges of Switching LED Drivers (Rev. A) 2013年 5月 3日
EVM 用户指南 AN-1969 LM3424 Boost Evaluation Board (Rev. A) 2013年 5月 3日
EVM 用户指南 AN-1985 LM3429 Buck-Boost Evaluation Board (Rev. C) 2013年 5月 3日
EVM 用户指南 AN-1986 LM3429 Boost Evaluation Board (Rev. B) 2013年 5月 3日
应用手册 AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) 2013年 4月 23日
用户指南 MR16 or PAR38 LED Bulb Ref Design w/the LM3429 LED Driver User Guide 2012年 1月 27日
应用手册 Application Note 1656 Design Challenges of Switching LED Drivers (cn) 下载最新的英文版本 (Rev.A) 2007年 10月 18日

设计和开发

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评估板

LM3429BKBSTEVAL — LM3429 - N 通道控制器 LED 驱动器降压/升压评估板

This wide range evaluation board showcases the LM3429 NFET controller used with a buck-boost current regulator. It is designed to drive 4 to 8 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 70V.

The evaluation board showcases most features of the LM3429 including PWM (...)

用户指南: PDF
TI.com 無法提供
评估板

LM3429BSTEVAL — LM3429 - N 通道控制器 LED 驱动器升压评估板

This evaluation board showcases the LM3429 NFET controller used with a boost current regulator. It is designed to drive 9 to 12 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 26V.

The evaluation board showcases most features of the LM3429 including PWM dimming, (...)

用户指南: PDF
TI.com 無法提供
仿真模型

LM3429 PSpice Transient Model (Rev. C)

SNVM655C.ZIP (114 KB) - PSpice Model
仿真模型

LM3429 TINA-TI Transient Reference Design

SNVM656.TSC (2199 KB) - TINA-TI Reference Design
仿真模型

LM3429 TINA-TI Transient Spice Model

SNVM657.ZIP (12 KB) - TINA-TI Spice Model
模拟工具

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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。

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  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
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