采用NXP公司 SSL2101 的7.5W 120V可調光的LED驅動器的參考設計采用反激式轉換器，提供隔離的解決方案。參考設計支持5個LED（輸出電流470mA）和7個LED(輸出電流340mA)負載，輸出功率大約為7.5W，效率大約為72%，適合于GU10燈。本文介紹了7.5W反激LED驅動參考設計主要指標，驅動5個和7個LED的演示板電路圖以及相應的材料清單和PCB布局圖。

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

圖1。SSL2101演示板外形圖（頂視圖）
7.5W反激LED驅動參考設計主要指標：



圖2。驅動5個LED的演示板電路圖

圖3。驅動7個LED的演示板電路圖
5個LED負載的SSL2101 120 V 演示板材料清單：


7個LED負載的SSL2101 120 V 演示板材料清單：



圖4。演示板元件布局圖

圖5。演示板變壓器主要指標
詳情請見：
http://www.nxp.com/documents/user_manual/UM10479.pdf