LM3450AEV120V30
LM3450A 120Vac 30W 2 级可调光 LED 驱动器
LM3450AEV120V30
概述
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 designed to operate from two different nominal AC input voltages, 120VAC or 230VAC.
The board employs a two stage design with an LM3450A flyback primary stage and an LM3409HV secondary stage. The LM3450A provides an isolated 50V regulated output voltage and a power factor corrected input current. The LM3409HV uses the 50V flyback output as its input and provides a constant current of 700mA to the LED load. This two stage design provides excellent line and load regulation as well as isolation. The board is comprised of two copper layers with components on both sides and an FR4 dielelctric. The two stage design has several key advantages over a single stage design including:
特性
- No 120 Hz LED current ripple.
- Better dimming performance at low dimming levels.
- Better line disturbance rejection.
- Better efficiency using small LED stack voltages.
120VAC 30W Version (This Board)
- Input Voltage Range: VIN = 90VAC - 135VAC
- Regulated Flyback Output Voltage: VOUT = 50V
- Maximum LED Stack Voltage: VLED < 45V
- Regulated LED Current: ILED = 700 mA
- Input Voltage Range: VIN = 180VAC - 265VAC
- Regulated Flyback Output Voltage: VOUT = 50V
- Maximum LED Stack Voltage: VLED < 45V
- Regulated LED Current: ILED = 700 mA
Contents:
- LM3420AEV120V30 120VAC Evaluation Board
- LM3450A Evaluation Board Application Note
照明 LED 驱动器
技术文档
| 类型 | 标题 | 下载最新的英语版本 | 日期 | |||
|---|---|---|---|---|---|---|
| 证书 | LM3450AEV120V30/NOPB EU Declaration of Conformity (DoC) | 2019-1-2 | ||||
| 证书 | LM3450AEV120V30/NO EU Declaration of Conformity (DoC) | 2019-1-2 | ||||
| 用户指南 | AN-2150 LM3450A Evaluation Board (Rev. B) | 2013-5-3 |