{"title":"用于低功耗应用的开关电容功率变换器的功率和面积效率提高技术","authors":"Hoi Lee, Zhe Hua","doi":"10.1109/EDSSC.2013.6628143","DOIUrl":null,"url":null,"abstract":"Switched-capacitor (SC) power converters that use capacitors as energy storage elements offer much better power density than switched-inductor counterparts and are thus attractive in low-power area-constrained applications. This paper first reviews the importance of having auto-reconfigurable conversion ratios in the SC power stage in order to enable the regulator to maintain high power efficiency under unstable input voltages. To minimize the required capacitors and power switches in SC power converters, multiple-output SC power regulators can share capacitors and power switches in the power stage for generating multiple regulated outputs and thus improving the converter area efficiency. To simultaneously illustrate above concepts, an auto-reconfigurable dual-output SC power regulator is developed to generate two outputs while saving 1 flying capacitor and 3 power switches compared with using two independent single-output doubler and tripler. The proposed regulator has minimal cross regulation between outputs and achieves a maximum power efficiency of 88% via auto-reconfiguration when the input voltage varies from 1.1V to 1.6V.","PeriodicalId":333267,"journal":{"name":"2013 IEEE International Conference of Electron Devices and Solid-state Circuits","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Power- & area-efficiency enhancement techniques of switched-capacitor power converters for low-power applications\",\"authors\":\"Hoi Lee, Zhe Hua\",\"doi\":\"10.1109/EDSSC.2013.6628143\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Switched-capacitor (SC) power converters that use capacitors as energy storage elements offer much better power density than switched-inductor counterparts and are thus attractive in low-power area-constrained applications. This paper first reviews the importance of having auto-reconfigurable conversion ratios in the SC power stage in order to enable the regulator to maintain high power efficiency under unstable input voltages. To minimize the required capacitors and power switches in SC power converters, multiple-output SC power regulators can share capacitors and power switches in the power stage for generating multiple regulated outputs and thus improving the converter area efficiency. To simultaneously illustrate above concepts, an auto-reconfigurable dual-output SC power regulator is developed to generate two outputs while saving 1 flying capacitor and 3 power switches compared with using two independent single-output doubler and tripler. The proposed regulator has minimal cross regulation between outputs and achieves a maximum power efficiency of 88% via auto-reconfiguration when the input voltage varies from 1.1V to 1.6V.\",\"PeriodicalId\":333267,\"journal\":{\"name\":\"2013 IEEE International Conference of Electron Devices and Solid-state Circuits\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2013-06-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2013 IEEE International Conference of Electron Devices and Solid-state Circuits\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/EDSSC.2013.6628143\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2013 IEEE International Conference of Electron Devices and Solid-state Circuits","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/EDSSC.2013.6628143","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Power- & area-efficiency enhancement techniques of switched-capacitor power converters for low-power applications
Switched-capacitor (SC) power converters that use capacitors as energy storage elements offer much better power density than switched-inductor counterparts and are thus attractive in low-power area-constrained applications. This paper first reviews the importance of having auto-reconfigurable conversion ratios in the SC power stage in order to enable the regulator to maintain high power efficiency under unstable input voltages. To minimize the required capacitors and power switches in SC power converters, multiple-output SC power regulators can share capacitors and power switches in the power stage for generating multiple regulated outputs and thus improving the converter area efficiency. To simultaneously illustrate above concepts, an auto-reconfigurable dual-output SC power regulator is developed to generate two outputs while saving 1 flying capacitor and 3 power switches compared with using two independent single-output doubler and tripler. The proposed regulator has minimal cross regulation between outputs and achieves a maximum power efficiency of 88% via auto-reconfiguration when the input voltage varies from 1.1V to 1.6V.