High-efficiency peak-current-control non-inverting buck–boost converter using mode selection for single Ni–MH cell battery operation
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- 作者：Jong-Seok Kim ; Jin-O Yoon ; Jaeyun Lee…
- 关键词：Buck–boost converter ; DC–DC converter ; Switch ; mode power supply ; Mode selection ; Peak ; current control
- 刊名：Analog Integrated Circuits and Signal Processing
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：89
- 期：2
- 页码：297-306
- 全文大小：1,954 KB
- 刊物类别：Engineering
- 刊物主题：Circuits and Systems
Electronic and Computer Engineering
Signal,Image and Speech Processing - 出版者：Springer Netherlands
- ISSN：1573-1979
- 卷排序：89
文摘
A peak-current-controlled non-inverting buck–boost converter with a mode selection scheme for a single Ni–MH cell battery operation is proposed. In order to extend the run time of a Ni–MH battery, the proposed mode selection circuit automatically puts the converter into a buck, boost, or buck–boost mode by comparing the input and output voltages. Among the three modes, the operation range of the buck–boost mode is designed to be minimized since its power conversion efficiency is lowest. The proposed mode selection circuit is applicable to peak-current control and variable output voltage converters. The frequency compensation circuit is designed to guarantee a sufficient phase margin for all three modes. The proposed converter is implemented in a 0.18 µm CMOS technology, and the chip area is 2.31 mm2. The experimental results show that the maximum power conversion efficiency of the proposed non-inverting buck–boost converter is enhanced to 88 % from 76 % which is that of the conventional non-inverting buck–boost converter.