原标题：NXP SSL2103 17W调光Greenchip LED驱动方案

　　nxp公司的SSL2103是可调光Greenchip LED驱动器,支持大多数调光解决方案,内置的电流具有谷底开关,从而最优化效率,具有去磁检测,超温保护(OTP),绕组短路保护(SWP)和过流保护(OCP),主要用在LED点和串照明以及背光.本文介绍了SSL2103主要特性和优势,方框图, 降压和反激配置图,以及采用SSL2103的230 V (AC) 17 W 可调光LED驱动演示板主要指标,电路图和材料清单.

　　The SSL2103 is a Switched Mode Power Supply (SMPS) controller IC that operates in combination with a phase cut dimmer directly from the rectified mains. It is designed to drive LED devices. The device includes a circuit to allow direct start-up from the rectified mains voltage.

　　For dimmer applications, an 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 to:

　　Use an external power switch to allow the IC to provide any power

　　Use an external bleeder transistors to provide extended dimmer interoperability

　　SSL2103主要特性和优势:

　　 Easy migration to existing lighting control infrastructure

　　 Supports most available dimming solutions

　　 Optimized efficiency with valley switching managed by a built-in circuitry

　　 Demagnetization detection

　　 OverTemperature Protection (OTP)

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

　　 Internal VCC generation allowing start-up from the rectified mains voltage

　　 Natural dimming curve by logarithmic correction, down to 1 %

　　 Suitable for flyback and buck applications

　　SSL2103应用:

　　 SSL applications with various power requirements

　　 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降压配置图

　　图3. SSL2103反激配置图

　　采用SSL2103的230 V (AC) 17 W 可调光LED驱动演示板

　　This user manual describes a demo board for evaluating an AC mains LED driver with a dimmer for 17 W, PAR38 LEDs using the SSL2103. It describes key features and connections to aid the design of LED drivers for typical applications.

　　The demo board operates from an AC mains voltage of 230 V (AC). The resulting design is a trade-off between high-power factor, efficiency and dimmer compatibility, combined with high output stability and ElectroMagnetic Compatibility (EMC) compliance.

　　17 W 可调光LED驱动演示板主要指标:

　　图4.17 W PAR38 LED驱动演示板外形图

　　17 W PAR38 LED驱动演示板(230VAC)材料清单: