[原创] NXP SSL5511T 60W(145 V－400 mA)LED驱动方案

NXP公司的SSL5511T是离线可调光LED控制器,支持反激,降压和降压-升压拓扑,可选择低THD或低LED电流波纹模式,模拟IEC60929输入或数字控制输入调光,集成了起动JFET,具有多种保护,主要用在100 V (AC), 120 V (AC)和230 V (AC) LED照明.本文介绍了SSL5511T主要特性和优势,框图,反激应用电路,以及演示板SSL5511DB1274主要特性,电路图和材料清单.

The SSL5511T is an offline dimmable controller IC, intended to drive dimmable LEDs ingeneral lighting applications, like remote-controlled luminaires and smart lamps.

The main benefits of this IC include:
• Dim level control with either an analog or a digital control input
• 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)
• Various converter topologies supported

The IC drives an external switch for easy power scaling. It has been designed to start updirectly from the High-Voltage (HV) supply by an internal high-voltage current source.

Flyback, buck and buck-boost circuit topologies are supported. Primary side sensingprovides accurate output current control.
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