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首页> 外文会议>2015 IEEE IAS Joint Industrial and Commercial Power Systems/ Petroleum and Chemical Industry Conference >A PFC modified-Landsman converter based PWM-Dimmable RGB HB-LED driver for large area projection applications
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A PFC modified-Landsman converter based PWM-Dimmable RGB HB-LED driver for large area projection applications

机译：基于PFC修改过的朗德曼转换器的PWM可调光RGB HB-LED驱动器，用于大面积投影应用

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摘要

This paper presents a modified-Landsman converter fed power factor correction (PFC) based light emitting diode (LED) driver. The application is targeted for high brightness (HB) projection application with brightness control of high brightness red-green-blue (HB-RGB) LED. A pulse width modulation (PWM) technique is used for current control to achieve brightness control of LED driver without compromising the efficiency. The modified-Landsman PFC converter is used to feed a dual output flyback DC-DC converter which supplies power to the forced cooling unit and the LED module with galvanic isolation. The brightness control of LED is performed by synchronous-buck converter. The PFC based modified-Landsman converter is designed to operate in discontinuous output inductor current mode for PFC at universal AC mains. A hardware prototype of the proposed LED driver is developed for experimental verification. The performance of the proposed driver is evaluated at full and light load condition for universal AC mains (90-265V) over a full range of brightness control. The power quality indices are found within the acceptable limits of international harmonic power quality standard IEC 61000-3-2 for universal AC mains.
机译：本文提出了一种基于改进的朗德曼转换器的功率因数校正（PFC）的发光二极管（LED）驱动器。该应用程序针对高亮度（HB-RGB）LED亮度控制的高亮度（HB）投影应用。脉冲宽度调制（PWM）技术用于电流控制，以在不影响效率的情况下实现LED驱动器的亮度控制。改进的Landsman PFC转换器用于为双输出反激式DC-DC转换器供电，该转换器以强制隔离的方式向强制冷却单元和LED模块供电。 LED的亮度控制由同步降压转换器执行。基于PFC的修改过的Landsman转换器被设计为在通用AC电源上以不连续的输出电感器电流模式工作，用于PFC。开发了所提议的LED驱动器的硬件原型，用于实验验证。在整个亮度控制范围内，针对通用交流电源（90-265V）在满载和轻载条件下评估提出的驱动器的性能。电能质量指标在通用交流电源的国际谐波电能质量标准IEC 61000-3-2的可接受范围内。

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