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High-efficient inverting buck-boost converter with fully digital-controlled switch width modulation for microdisplays

Title
High-efficient inverting buck-boost converter with fully digital-controlled switch width modulation for microdisplays
Author
권오경
Keywords
microdisplays; power convertors; BIMOS integrated circuits; power integrated circuits; high-efficient inverting buck-boost converter; fully digital-controlled switch width modulation; microdisplay application; discontinuous conduction mode; main power switch; BCDMOS process; voltage-4 V; voltage 1; 8 V; current 20 mA; size 0; 18 mum; efficiency 89; 3 percent
Issue Date
2018-01
Publisher
INST ENGINEERING TECHNOLOGY-IET
Citation
ELECTRONICS LETTERS, v. 54, no. 5, page. 309-311
Abstract
This letter proposes a highly efficient inverting buck-boost converter at light-load for microdisplay applications. The proposed buck-boost converter, which operates in discontinuous conduction mode, achieves high efficiency by modulating the switch width according to the sensed on-duty of the main power switch using the full-digital method. It generates an output voltage of -4 V using an input voltage of 1.8 V for a maximum load current (I-LOAD) of 20 mA. The proposed converter was fabricated in a 0.18 m bipolar CMOS DMOS (BCDMOS) process and measured to verify its performance. The measurement results showed that the proposed buck-boost converter achieved a maximum efficiency of 89.3% at I-LOAD of 20 mA and a high efficiency of up to 81.9% at light-load, where I-LOAD is <5 mA.
URI
https://digital-library.theiet.org/content/journals/10.1049/el.2017.4561http://repository.hanyang.ac.kr/handle/20.500.11754/117171
ISSN
0013-5194; 1350-911X
DOI
10.1049/el.2017.4561
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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