LM3401
- Hysteretic Control for Speed and Simplicity
- Input Operating Range of 4.5V-35V
- 1.5MHz Maximum Switching Frequency
- Low 200mV Reference Voltage
- Programmable Current Limit
- High speed CMOS Compatible Enable/Dimming
- Adjustable Hysteresis
- Input UVLO
- No output Capacitor Required
- 8-pin VSSOP Package
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The LM3401 is a switching controller designed to provide constant current to high power LEDs. The LM3401 drives an external P-MOSFET switch for step-down (Buck) regulators. The LM3401 delivers constant current within ±6% accuracy to a wide variety and number of series connected LEDs. Output current is adjusted with an external current sensing resistor to drive high power LEDs in excess of 1A.
For improved accuracy and efficiency, the LM3401 features dual-side hysteresis, very low reference voltage, and short propagation delay. A cycle by cycle current limit provides protection against over current and short circuit failures. Additional features include adjustable hysteresis and a CMOS compatible input pin for PWM dimming.
技术文档
| 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 | LM3401 Hysteretic PFET Controller for High Power LED Drive 数据表 (Rev. C) | 2013-5-2 | |||
| 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 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013-5-3 | ||||
| 应用手册 | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013-4-23 | ||||
| 用户指南 | LM3401 MR16 Reference Design for Non-Dimming & Dimming LED Application Usr Guide | 2012-1-27 | ||||
| 应用手册 | Application Note 1657 LM3401 Demo Board (cn) | 2008-7-29 |
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）。
LM3401-MR16DEMO — 用于不可调光和可调光 LED 应用的 LM3401 MR16 灯泡参考设计
This reference design was based on the released LM3401 evaluation board and associated application note AN-1657. The circuit and BOM was modified to optimize performance in MR16 solutions. A PCB was created that fits into the MR16 cavity. For fast bench set-up, the LM3401 evaluation board can be (...)
LM3401EVAL — 用于高功率 LED 驱动的 LM3401 滞后 PFET 控制器评估模块
The LM3401 is a switching buck regulator derived current source designed to drive a series string of high power, high brightness LEDs. The LM3401 controls an external P-FET, allowing the user to select a power device for the desired level of forward LED current. The LM3401 demo board can supply (...)
LED-CIE1931-COLOR-CALCULATOR — Accurately Plot LED Colour from a Power Spectrum (Excel)
Excel spreadsheet outlining LED color calculations performed in the article Accurately Plot LED Colour from a Power Spectrum by Donald Schelle. Includes calculations to plot LED color on a CIE 1931 xyY chart from its LED power spectrum.
LM3401DESIGN-CALC — LM3401 元件计算器
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
订购和质量
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