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首页> 外文期刊>Journal of Low Power Electronics >A High Power Switch-Mode LED Driver with an Efficient Current Sensing Scheme
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A High Power Switch-Mode LED Driver with an Efficient Current Sensing Scheme

机译:具有高效电流感应方案的大功率开关模式LED驱动器

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摘要

A high power buck-boost switch-mode LED driver delivering a constant 350 mA with a power efficient current sensing scheme is presented in this paper. The LED current is extracted by differentiating the output capacitor voltage and maintained by a track and hold. The circuit has been fabricated with a standard 0.35-μm AMS CMOS process. Measurement results demonstrated that the power-conversion efficiency of the design is over 90% with a line regulation of 8%/V for an input voltage of 3.3 V and a current output between 200 mA and 350 mA.
机译:本文介绍了一种高功率降压-升压型开关模式LED驱动器,该驱动器可提供恒定的350 mA电流,并具有高效的电流感应方案。通过区分输出电容器电压提取LED电流,并通过跟踪保持。该电路采用标准的0.35μmAMS CMOS工艺制造。测量结果表明,对于3.3 V的输入电压和200 mA至350 mA的电流输出,该设计的电源转换效率超过8%/ V,线路调节率为90%以上。

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