原标题：NXP SSL2101 7.5W反激LED驱动参考设计

　　采用nxp公司 SSL2101 的7.5W 120V可调光的LED驱动器的参考设计采用反激式转换器，提供隔离的解决方案。参考设计支持5个LED(输出电流470mA)和7个LED(输出电流340mA)负载，输出功率大约为7.5W，效率大约为72%，适合于GU10灯。本文介绍了7.5W反激LED驱动参考设计主要指标，驱动5个和7个LED的演示板电路图以及相应的材料清单和PCB布局图。

　　SSL2101 120 V 7.5 W GU10 flyback reference board

　　This document explains the operation and application of a 7.5 W 120 V dimmable LED driver featuring the SSL2101. The demo board has a form factor that is compatible with the base of a GU10 LED lamp. The board employs a flyback converter to provide an isolated solution for mains-dimmable LED recessed-light applications.

　　The board is available in two different versions, designed to support both a 5-LED and 7-LEDs load with an output power of approximately 7.5 W. The board operates at approximately 45 kHz and produces a regulated output current of 470 mA for the 5-LED load or 340 mA for the 7-LED load, with an efficiency of around 72 %. Both versions are fully compliant with EMC regulations. Key features of the board include:

　　• Deep dimming capability

　　• Wide dimming compatibility

　　• Small form factor tailored to fit a GU10 lamp

　　• Cost effectiveness

　　图1。SSL2101演示板外形图(顶视图)

　　7.5W反激LED驱动参考设计主要指标：

　　图2。驱动5个LED的演示板电路图

　　图3。驱动7个LED的演示板电路图

　　5个LED负载的SSL2101 120 V 演示板材料清单：

　　7个LED负载的SSL2101 120 V 演示板材料清单：

　　图4。演示板元件布局图

　　图5。演示板变压器主要指标