A Novel PWM/PFM Control Technique for Transient Improvement and High Efficiency Over a Wide Load Range in Buck DC-DC Converter

2018 IEEE 3rd International Conference on Integrated Circuits and Microsystems (ICICM) Pub Date : 2018-11-01 DOI:10.1109/ICAM.2018.8596546

Kai Luo, Han Wang, Chao Gou, Kewu Peng, Feng Yang, Yonggui Hu

{"title":"A Novel PWM/PFM Control Technique for Transient Improvement and High Efficiency Over a Wide Load Range in Buck DC-DC Converter","authors":"Kai Luo, Han Wang, Chao Gou, Kewu Peng, Feng Yang, Yonggui Hu","doi":"10.1109/ICAM.2018.8596546","DOIUrl":null,"url":null,"abstract":"This paper presents a novel pulse width modulation (PWM) and pulse frequency modulation (PFM) control technique to improve the transient response when the converter transition from PFM mode to PWM mode and improve efficiency over a wide load range. The proposed PWM/PFM control technique used multiplexers combines PWM modulator and PFM modulator together to simplify the circuit. There are two parallel paths to realize the transition from PFM mode to PWM mode for improving transient response. The first path dominates mode transition when the load current changes from light to 120mA-260mA, the second path dominates mode transition when the load current changes from light to 260mA-1A. Simulation results demonstrate that the proposed PWM/PFM control technique can realize auto-mode transition between PWM mode and PFM mode. The undershoot voltage is 75.8mV and recovery time is $3.3\\mu\\text{s}$ when the load current changes instantaneously from 10mA to 1A. Meanwhile, above 80% conversion efficiency can be reached over a load current range of 10mA-1A.","PeriodicalId":220324,"journal":{"name":"2018 IEEE 3rd International Conference on Integrated Circuits and Microsystems (ICICM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 IEEE 3rd International Conference on Integrated Circuits and Microsystems (ICICM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICAM.2018.8596546","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 4

Abstract

This paper presents a novel pulse width modulation (PWM) and pulse frequency modulation (PFM) control technique to improve the transient response when the converter transition from PFM mode to PWM mode and improve efficiency over a wide load range. The proposed PWM/PFM control technique used multiplexers combines PWM modulator and PFM modulator together to simplify the circuit. There are two parallel paths to realize the transition from PFM mode to PWM mode for improving transient response. The first path dominates mode transition when the load current changes from light to 120mA-260mA, the second path dominates mode transition when the load current changes from light to 260mA-1A. Simulation results demonstrate that the proposed PWM/PFM control technique can realize auto-mode transition between PWM mode and PFM mode. The undershoot voltage is 75.8mV and recovery time is $3.3\mu\text{s}$ when the load current changes instantaneously from 10mA to 1A. Meanwhile, above 80% conversion efficiency can be reached over a load current range of 10mA-1A.

查看原文本刊更多论文

一种新的PWM/PFM控制技术用于Buck DC-DC变换器的暂态改善和宽负载范围内的高效率

本文提出了一种新的脉宽调制(PWM)和脉频调制(PFM)控制技术，以改善变换器从PFM模式转换到PWM模式时的瞬态响应，并在宽负载范围内提高效率。本文提出的PWM/PFM控制技术采用多路复用器将PWM调制器和PFM调制器组合在一起以简化电路。为了提高暂态响应，有两条并联路径实现从PFM模式到PWM模式的转换。当负载电流由轻到120mA-260mA时，第一路径主导模式转换，当负载电流由轻到260mA-1A时，第二路径主导模式转换。仿真结果表明，所提出的PWM/PFM控制技术可以实现PWM模式与PFM模式之间的自动模式转换。当负载电流从10mA瞬间变为1A时，欠冲电压为75.8mV，恢复时间为3.3\mu\text{s}$。同时，在10mA-1A负载电流范围内，转换效率可达到80%以上。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2018 IEEE 3rd International Conference on Integrated Circuits and Microsystems (ICICM)

自引率

0.00%

发文量