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Digitally controlled improved THD and power factor single-stage flyback LED driver with active input-current wave-shaping

机译:具有有源输入电流波形整形的数字控制改进型THD和功率因数单级反激式LED驱动器

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摘要

This paper presents single-stage constant-current high-brightness light-emitting-diode (HB LED) driver with flyback topology based power-factor-corrector (PFC) section operating in transition-mode or boundary conduction-mode. Active input-current shaping technique is employed to improve total-harmonic-distortion (THD) and power-factor (PF). A digital output-current regulator and a digital phase-locked-loop (PLL) algorithm is developed using an 8-bit microcontroller to achieve the stated goal. Mathematical analysis and experimental results are presented to demonstrate the proposed scheme.
机译:本文提出了一种单级恒流高亮度发光二极管(HB LED)驱动器,该驱动器具有基于反激拓扑的功率因数校正器(PFC)部分,可在过渡模式或边界传导模式下工作。有源输入电流整形技术用于改善总谐波失真(THD)和功率因数(PF)。使用8位微控制器开发了数字输出电流调节器和数字锁相环(PLL)算法,以实现所述目标。给出了数学分析和实验结果以证明该方案。

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