一款高效率、三模式、低EMI的同步整流型Buck DC-DC转换器OA
High-efficiency,tri-mode,low-EMI synchronized buck DC-DC converter
基于国产 55 nm CMOS(Complementary Metal-Oxide-Semiconductor)工艺,设计了一款适合低电磁干扰(Electromagnetic Interference,EMI)应用,峰值效率为 92.95%的三模式Buck DC-DC转换器芯片.在不同负载条件下,该DC-DC芯片可以在脉冲宽度调制(Pulse Width Modulation,PWM)、脉冲频率调制(Pulse Frequency Modulation,PFM)以及跳脉冲调制(Pulse Skip Modulation,PSM)间无缝切换,优化了效率与纹波表现.芯片基于扩频调制技术(Spread-Spectrum Frequency Modulation,SSFM),通过实现35%频率抖动的扩频调制,使得Buck转换器的输出电压频谱峰值降低 22 dB,显著抑制了DC-DC转换器产生的电磁干扰.
This paper presents a tri-mode buck converter designed using the 55 nm Complementary Metal-Oxide-Semiconductor(CMOS)process,which offers a peak efficiency of 92.95%for low-EMI applications.The converter employs a seamless transition between pulse-width modulation(PWM),pulse-frequency modulation(PFM),and pulse-skip modulation(PSM)modes under various load conditions,which optimizes the efficiency and ripple performance from light to heavy loads.By implementing spread-spectrum frequency modulation with 35%frequency dithering,the converter reduces the peak of the output voltage spectrum by 22 dB,thus significantly reducing the EMI emission spectrum.
丁世翔;郝松茂;石春琦
华东师范大学 微电子电路与系统研究所,上海 200241华东师范大学 微电子电路与系统研究所,上海 200241华东师范大学 微电子电路与系统研究所,上海 200241
信息技术与安全科学
Buck转换器低EMI扩频调制多工作模式高效率
buck converterlow-EMIspread spectrum frequency modulation(SSFM)multiple operating modeshigh efficiency
《华东师范大学学报（自然科学版）》 2026 (2)
82-94,13
上海市科委资助项目(22DZ2229004)中央高校基本科研业务费专项资助项目(40500-20103-222178)
评论