A Single-Inductor Multiple-Output Auto-Buck-Boost DC-DC Converter With Autophase Allocation
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摘要A single-inductor multiple-output (SIMO) converter with auto-buck-boost feature is presented in this paper. A seamless auto-buck-boost scheme for SIMO dc-dc converter using time-multiplexing control is proposed. Additionally, with the proposed first-order phase-locked loop (FOPLL) and autophase allocation, this circuit solves the problem of unbalanced loadings of different channels, and it also keeps the locking time of the inductor current sufficiently short to minimize average inductor current for attaining higher efficiency. By combining with all channel controllers, FOPLL not only allows fast load-transient response without degrading the power efficiency, but it also reduces controller order of the frequency control loop, attenuates the noise injected from charge pump, and achieves robust stability. The scheme enables the dc-dc converter to operate from wide input and output ranges. Implemented in a 0.35-mu m CMOS technology, the chip area is 5000 mu m x 1850 mu m, including ESD test pads. The switching frequency is fixed at 0.25 MHz. The load-transient response time is less than 100 mu s. The proposed converter achieves a peak efficiency of 89% and maximum output power up to 1.46 W with efficiency of 70%.
著者Zheng YQ, Ho M, Guo JP, Mak KL, Leung KN
期刊名稱IEEE Transactions on Power Electronics
詳細描述Vol. 31, No. 3,
出版年份2016
月份3
日期1
卷號31
期次3
出版社IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
頁次2296 - 2313
國際標準期刊號0885-8993
電子國際標準期刊號1941-0107
語言英式英語
關鍵詞Auto-buck-boost; single-inductor multiple-output (SIMO) dc-dc converters; time-multiplexing control
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic

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