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A 40-W Flyback Converter with Dual-Operation Modes for Improved Light Load Efficiency

Title
A 40-W Flyback Converter with Dual-Operation Modes for Improved Light Load Efficiency
Author
유창식
Keywords
Flyback converter; frequency reduction; power efficiency; pulse width modulation (PWM); pulse frequency modulation (PFM); BCDMOS
Issue Date
2015-08
Publisher
IEEK PUBLICATION CENTER
Citation
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, v. 15, NO 4, Page. 493-500
Abstract
A flyback converter operates with either pulse width modulation (PWM) or pulse frequency modulation (PFM) control scheme depending on the load current. At light load condition, PFM control is employed to reduce the switching frequency and thereby minimize the switching power loss. For heavier load, PWM control is used to regulate the output voltage of the flyback converter. The flyback controller has been implemented in a 0.35 mu m BCDMOS process and applied to a 40-W flyback converter. The light-load power efficiency of the flyback converter is improved up to 5.7-% comparing with the one operating with a fixed switching frequency.
URI
http://www.jsts.org/html/journal/journal_files/2015/08/Year2015Volume15_04_08.pdfhttp://hdl.handle.net/20.500.11754/27110
ISSN
1598-1657; 2233-4866
DOI
10.5573/JSTS.2015.15.4.493
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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