TI TPS6118x白光LED驱动方案
TI 公司的TPS6118x是媒体LCD背景光高度集成的解决方案,有内置的集成了1.5A/40C功率MOSFET的高效升压稳压器,6个高精度电流和匹配的稳压器,器件支持总数高达60个白光LED(WLED).此外,升压稳压器的输出能根据自动WLED的正向压降来调整,以提高效率. TPS6118x的输入电压5 V 到24 V,100:1的PWM亮度调整,可广泛应用于笔记本电脑和UMPC LCD显示器背景光,以及各种媒体尺寸的LCD显示器背景光.本文介绍了TPS61180/1/2的主要性能, 功能方框图, 典型应用电路图, 评估板电路图和材料清单(BONM)以及音频降噪电路和多种高亮度LED串驱动电路图.
The TPS61180/1/2 ICs provide highly integrated solutions for media size LCD backlight. These devices have a built-in high efficiency boost regulator with integrated 1.5A/40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLED. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.
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