原标题：NXP SSL2101 12W调光LED驱动方案

　　nxp公司的SSL2101是开关电源(SMPS)控制器,可直接从火线整流电压工作,并集成了相位调光器.器件包括高压功率开关,以及允许直接从整流的火线电压工作的电路和给相位调光器供电的高压电路.主要用于高达15W的LED模块驱动.本文介绍了SSL2101主要特性,方框图,典型应用电路图以及12W调光LED驱动器电路,输入电压230VAC和120VAC所用的材料清单(BOM).

　　The SSL2101 is a Switched Mode Power Supply (SMPS) controller IC that operates directly from rectified mains and also in combination with a phase cut dimmer. It is designed to drive LED devices. The device includes a high-voltage power switch and a circuit to allow start-up directly from the rectified mains voltage. Furthermore the device includes high-voltage circuitry to supply the phase cut dimmer.

　　For dimmable applications, integrated dedicated circuitry optimizes the dimming curve.

　　SSL2101主要特性:

　　Easy migration to existing lighting control infrastructure, TRIAC and transistor dimmers

　　Supports majority of available dimming solutions

　　Valley switching efficiency is optimized by built-in dedicated circuitry

　　Built-in demagnetization detection

　　The IC has built-in OverTemperature Protection (OTP)

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

　　The IC has internal VCC generation that allows start-up from rectified mains voltage

　　Natural dimming curve by logarithmic correction

　　SSL2101应用:

　　The SSL2101 is suitable for different power requirements, these include:

　　SSL, retro-fit lamps, e.g. GU10, up to a maximum of 10 W

　　LED modules, separate power supplies, e.g. LED spots, down-lights, up to a maximum of 15 W

　　LED strings, e.g. retail display, up to a maximum of 15 W

　　图1.SSL2101方框图

　　图2.SSL2101反激应用配置框图

　　图3.SSL2101典型的反激应用电路图

　　图4.SSL2101典型的反激应用和元件电路图

　　SSL2101/2102 12W调光LED驱动器

　　The SSL2101/2102 12 W LED driver is a solution for a professional application with multiple high power LEDs that requires galvanic isolation and a safe output voltage. It is mains dimmable for both forward phase (TRIAC) dimmers, and reverse phase (Transistor)dimmers. It can generate up to 16 W output power, which is equal to a 100 W incandescent lamp (at 63 Lumen/W). Examples are shelf lighting, down lighting, LED lighting for bathrooms etc.The design gives an example of how to make a drive that is suitable for small form factor applications like retrofit lamps.

　　The board needs to be connected to mains voltage. Touching the reference board during operation must be avoided at all times. An isolated housing is obligatory when used in uncontrolled, non laboratory environments. Even though the secondary circuit with LED connection has a galvanic isolation, this isolation is not according to any regulated norm. Galvanic isolation of the mains phase using a variable transformer is always recommended.

　　The board can be optimized for a 230 V (AC) (50 Hz) or for a 120 V (AC) (60 Hz) mains source. Besides the mains voltage optimization, the board is designed to work with multiple high power LEDs with a total working voltage of between 9 V and 23 V.

　　The output current can be limited using trimmer R20. On request, a dedicated LED load can be delivered that is to be connected to K3. Connector K2 can be used to attach other LED loads. The output voltage is limited to 25 V. When attaching a LED load to an operational board (hot plugging) an inrush peak current will occur due to discharge of capacitor C6.After frequent discharges, the LEDs may deteriorate or become damaged.

　　图4.12W调光LED驱动器外形图

　　图5.12W调光LED驱动器电路图

　　材料清单(BOM)(230VAC):

　　材料清单(BOM)(120VAC):