TI TPS92551 450mA 23W恒流微模块LED驱动解决方案
TI公司的TPS92551是恒流降压LED驱动微型模块,最大驱动电流450mA,功率23W,能驱动多达16个LED/串.器件集成了包括电源指示器的所有功率元件,电源效率高达95%,输入电压4.5V-60V,LED电流从300mA到450mA可调整,开关频率800kHz,主要用在通用照明如台灯,装饰灯,街灯,建筑照明如水下照明,壁龛照明和聚光灯等.本文介绍了TPS92551主要特性和封装亮点,方框图,典型应用电路和相应的材料清单,评估板PCB布局图.
The TPS92551 Constant Current Buck LED Driver Micro-Module drives maximum 450mA LED current up to 16 LEDs in a single string (maximum 23W). It integrates all the power components including the power inductor. The TPS92551 provides a full turn-key, highly efficient solution for wide range of single string LED lighting applications with up to 95% power efficiency. It accepts an input voltage ranging from 4.5V to 60V and delivers a 350mA LED current as default. The LED current is adjustable from 300mA to 450mA by charging a single external resistor.
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