原标题：NXP SSL2103可调光LED照明方案

　　nxp公司的SSL2103用于可调光LED照明的开关电源(SMPS)控制器, 是一款多用途AC/DC LED照明控制器, 具有更宽的功率适用范围和更好的调光兼容性，令其适用于可调及不可调LED照明灯。SSL2103针对更高功率的LED照明灯具(PAR20、PAR30 和PAR38)而设计，为LED灯具设计者在功率、外形尺寸及调光控制方面提供完全的灵活性。本文介绍了SSL2103主要特性和优势, 方框图以及降压稳压器配置图和反激电源配置图.

　　SSL2103 is a Switched Mode Power Supply (SMPS) controller IC designed for LED lighting applications. It is an extension of the NXP SSL2101/SSL2102 product platform,allowing easy design of derivative applications.When used in combination with a phase cut dimmer connected directly to a rectified mains, it provides dimmability to the application.In dimmer applications, integrated dedicated circuitry optimizes the dimming curve.

　　• SSL2101: fully integrated LED driver for lamps up to 10 W

　　• SSL2102: fully integrated LED driver for lamps up to 25 W

　　• SSL2103: gives the application designer flexibility permitting the:

　　control of an external power switch to allow the IC to provide any power

　　control of external bleeder transistors to provide extended dimmer interoperability

　　SSL2103主要特性和优势:

　　Easy migration to existing lighting control infrastructures, TRIAC and transistor

　　dimmers

　　Compatible with most dimming solutions

　　Optimized efficiency with valley switching managed by built-in circuitry

　　Built-in demagnetization detection

　　Built-in OverTemperature Protection (OTP)

　　Short-Winding Protection (SWP) and OverCurrent Protection (OCP)

　　Internal VCC generation allowing start-up from rectified mains voltage

　　Natural dimming curve by logarithmic correction, optimized for human eye response,

　　down to 1 %

　　SSL2103应用:

　　The SSL2103 is suitable for various power requirements including:

　　Retro-fit lamps

　　LED modules such as LED spots and down-lights

　　LED strings suitable for retail displays etc.

　　图1.SSL2103方框图

　　图2.SSL2103降压稳压器配置图

　　图3.SSL2103反激电源配置图