LM3407
- Input Operating Range 4.5 V to 30 V
- Output Voltage Range: 0.1 VIN to 0.9 VIN
- Accurate Constant Current Output
- Independent Device Enable (CMOS Compatible) and PWM Dimming Control
- Converter Switching Frequency Adjustable From 300 kHz to 1 MHz
- No External Control Loop Compensation Required
- Supports Ceramic and Low ESR Output Capacitors
- Input Undervoltage Lockout (UVLO)
- Thermal Shutdown Protection
- MSOP-8 PowerPAD Package
The LM3407 device is a constant current output floating buck switching converter designed to provide constant current to high-power LEDs. The device is ideal for automotive, industrial, and general lighting applications. The LM3407 has an integrated power N-channel MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converter output voltage to adjust as needed to deliver constant current within 10% accuracy to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for low-power shutdown. An exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LM3407 350-mA, Constant Current Output Floating Buck Switching Converter for High-Power LEDs 数据表 (Rev. C) | PDF | HTML | 2016年 11月 15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 | |||
用户指南 | LM3407 Component Calculator (Rev. A) | 2016年 5月 23日 | ||||
应用手册 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 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 | ||||
EVM 用户指南 | AN-1763 LM3407 Evaluation Board Reference Design (Rev. A) | 2009年 1月 21日 | ||||
应用手册 | Application Note 1763 LM3407 Evaluation Board Reference Design (cn) | 2009年 1月 21日 | ||||
应用手册 | Application Note 1656 Design Challenges of Switching LED Drivers (cn) | 最新英语版本 (Rev.A) | 2007年 10月 18日 |
设计和开发
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LM3407EVAL — 350mA,恒流输出浮动降压开关稳压器评估板
The LM3407 evaluation board contains a Pulse-Width-Modulation (PWM) floating buck converter with an integrated N-Channel power MOSFET and is designed to provide a constant current output for driving high power LEDs, such as the Lumileds Luxeon® power LEDs and OSRAM Golden DRAGON® LED.
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
HVSSOP (DGN) | 8 | Ultra Librarian |
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