High-efficiency peak-current-control non-inverting buck-boost converter using mode selection for single Ni-MH cell battery operation
- Authors
- Kim, Jong Seok; Yoon, Jin-O; Lee, Jaeyun; Choi, Byong-Deok
- Issue Date
- Nov-2016
- Publisher
- Kluwer Academic Publishers
- Keywords
- Buck-boost converter; DC-DC converter; Switch-mode power supply; Mode selection; Peak-current control
- Citation
- Analog Integrated Circuits and Signal Processing, v.89, no.2, pp.297 - 306
- Indexed
- SCIE
SCOPUS
- Journal Title
- Analog Integrated Circuits and Signal Processing
- Volume
- 89
- Number
- 2
- Start Page
- 297
- End Page
- 306
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/21422
- DOI
- 10.1007/s10470-016-0787-0
- ISSN
- 0925-1030
- Abstract
- 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 mu m CMOS technology, and the chip area is 2.31 mm(2). 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.
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