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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM3401 Hysteretic PFET Controller for High Power LED Drive datasheet (Rev. C) | 2013/5/2 | |||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 應用說明 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013/5/3 | ||||
| 應用說明 | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013/4/23 | ||||
| 使用指南 | LM3401 MR16 Reference Design for Non-Dimming & Dimming LED Application Usr Guide | 2012/1/27 |
設計與開發
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LM3401-MR16DEMO — 適合於非調光和調光 LED 應用的 LM3401 MR16 燈泡參考設計
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 — 用於高功率 LED 驅動的 LM3401 磁滯 PFET 控制器評估模組
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 零組件計算機
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
訂購與品質
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