LM3444
- Application Voltage Range: 80 VAC to 277 VAC
- Capable of Controlling LED Currents
Greater than 1 A - Adjustable Switching Frequency
- Low Quiescent Current
- Adaptive Programmable Off-Time Allows for
Constant Ripple Current - Thermal Shutdown
- No Flicker at 120 Hz
- Low-Profile 10-Pin VSSOP Package
or 8-Lead SOIC Package - Patented Drive Architecture
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC undervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.
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 | LM3444 AC-DC Offline LED Driver 数据表 (Rev. D) | PDF | HTML | 2015-12-31 | ||
| 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 | |||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013-5-3 | ||||
| 应用手册 | AN-2097 LM3444 - 230VAC, 8W Isolated Flyback LED Driver (Rev. F) | 2013-5-1 | ||||
| 应用手册 | AN-2082 LM3444 -120VAC, 8W Isolated Flyback LED Driver (Rev. E) | 2013-5-1 | ||||
| 用户指南 | AN-2083 LM3444 A19 Edison Retrofit Evaluation Board (Rev. C) | 2013-5-1 | ||||
| 应用手册 | An Improved Line Regulation Solution Used in LM3444/5 Non-Isolated LED Lighting | 2012-10-25 | ||||
| 用户指南 | LM3444 MR16 Buck-Boost Reference Design (Rev. A) | 2012-2-17 | ||||
| 用户指南 | LM3444 MR16 Boost Reference Design User Guide (Rev. A) | 2012-2-13 |
设计与开发
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |