Digital Architecture for Driving Large LED Arrays with Dynamic Bus Voltage Regulation and Phase Shifted PWM
作者： Montu Doshi , Regan Zane
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摘要: This paper introduces a digital architecture suitable for driving large number of High Brightness Light Emitting Diodes (HB-LEDs) with improved system efficiency and reduced EMI. Key advantages are achieved by combining coordinating control the power converter LED strings, resulting in deterministic load behavior. Uniform phase shifting strings is performed to minimize current variations, output capacitance, string voltages detected online used feedforward path dynamic bus voltage scaling, at low dimming levels. Experimental results presented 15 W boost FPGA based 64 array 8 strings.
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