原标题：NXP SSL5301T 12W调光LED电源解决方案

　　nxp公司的SSL5301T 是可调光控制器,具有高可调光兼容性,调光范围大,单级拓扑PCB占位面积小,集成了起动JFET,可选择模式以得到高功率系数或低波纹,使得LED电源较宽,主要用在通用LED照明.本文介绍了SSL5301T主要优势和特性,框图,几种典型应用电路以及12W评估板SSL5301DB1213主要指标,电路图,材料清单,PCB元件布局图和变压器T1电路与主要指标..

　　The SSL5301T is a mains dimmable controller IC, intended to drive dimmable LEDs in general lighting applications.

　　SSL5301T主要优势:

　　• High dimmer compatibility

　　• Selectable modes for high power factor or low ripple, allowing a wide LED power range

　　• Large dimming range

　　• Single stage topology for small PCB footprint

　　• Ease of design-in

　　• Integrated start-up JFET

　　• Low electronic Bill Of Material (BOM)

　　• Supports multi-lamp applications

　　• Various converter topologies supported

　　The IC drives an external switch for easy power scaling. It has been designed to start up directly from the High-Voltage (HV) supply by an internal high-voltage current source. Flyback, buck and buck-boost circuit topologies are supported. Primary side sensing provides accurate output current control.

　　The IC can detect all known mains dimmer types and translate the dimmer setting to a continuous LED current in multiple ways. It can operate in three switching modes at two switching frequency ranges. It offers tradeoffs between the output current ripple, the mains current Total Harmonic Distortion (THD) and the application size. The IC incorporates all required protection features.

　　SSL5301T主要特性:

　　 LED controller IC for driving strings of LEDs or high-voltage LEDs from rectified mains

　　 High-efficiency switch mode buck, flyback or buck-boost controller driving an external power FET

　　 Two maximum switching frequencies for highest efficiency or smallest application size

　　 Zero current switching at switch turn-on

　　 Zero voltage or valley switching at switch turn-on

　　 Selectable low THD or low LED current ripple modes

　　 Leading, trailing and intelligent dimmer detection

　　 Two built-in dim curves

　　 LED current accuracy within 4 % across variations in components and conditions

　　 No binning on LED forward voltage required

　　 Built-in Protections:

　　 UnderVoltage LockOut (UVLO)

　　 Leading-Edge Blanking (LEB)

　　 OverCurrent Protection (OCP)

　　 Internal OverTemperature Protection (OTP)

　　 Brownout protection

　　 Output short protection

　　 Output open protection

　　 Mains synchronization loss protection

　　 Bleeder dissipation protection

　　 Low component count LED driver solution

　　 Compatible with wall switches with built-in indication light during standby

　　 Operates well in multiple-lamp arrangements

　　 IC lifetime matches or surpasses LED lamp lifetime

　　SSL5301T应用:

　　 Compact mains dimmable LED lamps with accurate, dimmable current output for single mains voltages, including 100 V (AC), 120 V (AC) and 230 V (AC). External components determine the power level. The power level ranges from 4 W to over 25 W. Applications fit in common form factors like PAR, GU10, A19, and the candle form factor

　　图1. SSL5301T框图

　　图2. SSL5301T降压-升压转换器电路图:低波纹,输入=230VAC,输出=90V/50mA

　　图3. SSL5301T反激转换器电路图:低波纹,输入=230VAC,输出=36V/250mA

　　图4. SSL5301T降压转换器电路图:低波纹,输入=120VAC,输出=37V/290mA

　　12W评估板SSL5301DB1213

　　This user manual describes the operation of the SSL5301DB1213 230 V 12 W dimmable LED driver featuring the SSL5301 using a flyback topology. The SSL5301DB1213 demo board has a form factor that is compatible with the base of an A19 LED lamp fitting used in Solid State Lighting (SSL) applications.

　　The SSL5301DB1213 demo board input is connected to the 230 V mains. Avoid touching the board while it is connected to the mains voltage and when it is in operation. An isolated housing is obligatory when used in uncontrolled, non-laboratory environments.

　　Galvanic isolation from the mains phase using a fixed or variable transformer is always recommended.

　　The board is optimized for a 230 V/50 Hz mains supply. In addition to the mains voltage optimization, the board is designed to work with multiple LEDs or an LED module with a 40 V forward voltage. The mains connection of the SSL5301DB1213 demo board is different from other general evaluation/reference boards.

　　12W评估板SSL5301DB1213主要指标:

　　图5. 12W评估板SSL5301DB1213外形图

　　12W评估板SSL5301DB1213材料清单:

　　变压器T1指标: