{"title":"一款8Ω 5.5W, 0.006% THD+N, 2×VBAT-Swing全差分线性Buck-Boost拓扑的开关模式音频放大器，总效率为87%","authors":"Ji-Hun Lee, Hyunsik Kim","doi":"10.23919/VLSICircuits52068.2021.9492469","DOIUrl":null,"url":null,"abstract":"This paper presents a fully-differential single-inductor linear buck-boost power topology-based switched-mode audio amplifier. The pro-posed buck-boost topology outputs from 0 to 2× battery voltage while improving efficiency by up to 10% compared to the dual-step conversion of Class-D after the step-up. The inductor-freewheeling with a fixed de-energizing phase linearizes the voltage conversion in the buck-boost. The chip fabricated in 0.18-μm achieves 0.006% THD+N and 87% efficiency at a maximum output power of 5.5W on an 8Ω-speaker.","PeriodicalId":106356,"journal":{"name":"2021 Symposium on VLSI Circuits","volume":"225 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An 8Ω 5.5W, 0.006% THD+N, 2×VBAT-Swing Switched-Mode Audio Amplifier with Fully-Differential Linear Buck-Boost Topology Achieving Total Efficiency of 87%\",\"authors\":\"Ji-Hun Lee, Hyunsik Kim\",\"doi\":\"10.23919/VLSICircuits52068.2021.9492469\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper presents a fully-differential single-inductor linear buck-boost power topology-based switched-mode audio amplifier. The pro-posed buck-boost topology outputs from 0 to 2× battery voltage while improving efficiency by up to 10% compared to the dual-step conversion of Class-D after the step-up. The inductor-freewheeling with a fixed de-energizing phase linearizes the voltage conversion in the buck-boost. The chip fabricated in 0.18-μm achieves 0.006% THD+N and 87% efficiency at a maximum output power of 5.5W on an 8Ω-speaker.\",\"PeriodicalId\":106356,\"journal\":{\"name\":\"2021 Symposium on VLSI Circuits\",\"volume\":\"225 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-06-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2021 Symposium on VLSI Circuits\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.23919/VLSICircuits52068.2021.9492469\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 Symposium on VLSI Circuits","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.23919/VLSICircuits52068.2021.9492469","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An 8Ω 5.5W, 0.006% THD+N, 2×VBAT-Swing Switched-Mode Audio Amplifier with Fully-Differential Linear Buck-Boost Topology Achieving Total Efficiency of 87%
This paper presents a fully-differential single-inductor linear buck-boost power topology-based switched-mode audio amplifier. The pro-posed buck-boost topology outputs from 0 to 2× battery voltage while improving efficiency by up to 10% compared to the dual-step conversion of Class-D after the step-up. The inductor-freewheeling with a fixed de-energizing phase linearizes the voltage conversion in the buck-boost. The chip fabricated in 0.18-μm achieves 0.006% THD+N and 87% efficiency at a maximum output power of 5.5W on an 8Ω-speaker.
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