LM3450
- Critical Conduction Mode PFC
- Over-Voltage Protection
- Feedback Short Circuit Protection
- 70:1 PWM Decoded From Phase Dimmer
- Analog Dimming
- Programmable Dimming Range
- Digital Angle and Dimmer Detection
- Dynamic Holding Current
- Smooth Dimming Transitions
- Low Power Operation
- Start-Up Pre-Regulator Bias
- Precision Voltage Reference
All trademarks are the property of their respective owners.
The LM3450/50A is a power factor controller (PFC) with separate phase dimming decoder. The PFC regulates the output voltage while maintaining excellent power factor. The phase dimming decoder interprets the phase angle and remaps it to a 500Hz PWM output. This device is ideal for implementing a dimmable off-line LED driver for 10-100W loads.
The phase dimming decoder has several unique features. The input-output mapping is programmable for design flexibility, while a dynamic filter and variable sampling rate provide smooth uniform dimming. A dynamic hold circuit ensures that the phase dimmer angle is decoded properly while minimizing extra power loss.
The LM3450A is identical to the LM3450 with the exception of one circuit operation. The dynamic hold current is sampled in the LM3450 while it continuously operates in the LM3450A. This difference between the two devices defines the suitable applications for each. The following is a general guideline for choosing the correct device:
- Any 120V designs with POUT > 15W - LM3450A
- Any 230V designs with POUT > 25W - LM3450A
- 120V 2-Stage designs with POUT < 15W - LM3450
- 230V 2-Stage designs with POUT < 25W - LM3450
技术文档
| 类型 | 标题 | 下载最新的英语版本 | 日期 | |||
|---|---|---|---|---|---|---|
| * | 数据表 | LM3450/A LED Drivers with Active Power Factor Correction & Phase Dimming Decoder 数据表 (Rev. D) | 2013年 5月 1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 | |||
| 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 | ||||
| 应用手册 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013年 5月 3日 | ||||
| 用户指南 | AN-2098 LM3450 Evaluation Board (Rev. A) | 2013年 5月 3日 | ||||
| 用户指南 | AN-2150 LM3450A Evaluation Board (Rev. B) | 2013年 5月 3日 | ||||
| 更多文献资料 | LED 照明 灯泡替代及筒灯照明解决方案 | 2013年 3月 28日 | ||||
| 应用手册 | LM3450_A Design Calculator Instructions | 2012年 4月 19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
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）。
LM3450AEV120V30 — LM3450A 120Vac 30W 2 级可调光 LED 驱动器
The LM3450A evaluation board is designed to provide an AC to LED solution for a 30W LED load. Specifically, it takes an AC mains input and converts it to a constant current output of 700 mA for a series string of 1 to 13 LEDs (maximum LED stack voltage of 45V). There are two assembly versions (...)
LM3450AEV230V30 — LM3450A 230Vac 30W 2 级可调光 LED 驱动器
The LM3450A evaluation board is designed to provide an AC to LED solution for a 30W LED load. Specifically, it takes an AC mains input and converts it to a constant current output of 700 mA for a series string of 1 to 13 LEDs (maximum LED stack voltage of 45V). There are two assembly versions (...)
PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®
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。
在 PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点
推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。