采用随机脉冲位置调制的数字控制低电磁干扰开关变换器

Jui-Chi Wu, Chin-Wei Mu, Chun-Hung Yang, Chien-Hung Tsai
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引用次数: 12

摘要

结合RPPM(随机脉冲位置调制),我们改进的混合DPWM(数字脉冲宽度调制器)和AEDPWM(面积效率DPWM)方案,提出了一种全数字控制的低电磁干扰开关转换器,以减少面积和功耗实现低电磁干扰。设计了一个fpga控制的开关频率为1mhz、输入电压为1.8 V、输出电压为0.6-1.2V的降压变换器样机。由此产生的开关噪声抑制能力平均可达18 dB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Digitally controlled low-EMI switching converter with random pulse position modulation
A fully digital controlled low-EMI switching converter combining RPPM (Random Pulse Position Modulation), our improved version of Hybrid DPWM (Digital Pulse Width Modulator) and AEDPWM (Area-Efficient DPWM) schemes is proposed to achieve low-EMI (Electromagnetic Interference) with reduced area and power consumption. A FPGA-controlled prototype buck converter operating at 1 MHz switching frequency with 1.8 V input voltage and 0.6–1.2V output voltage is presented to demonstrate the technique. The resulting switching noise suppression capability is up to 18 dB in average.
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