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Single‐stage single‐switch PFC converter for wide‐input extreme step‐down voltage applications
Author(s) -
Ismail Esam H.,
AlSaffar Mustafa A.,
Sabzali Ahmad J.,
Zerai Adel A.
Publication year - 2013
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.813
Subject(s) - voltage , buck converter , buck–boost converter , topology (electrical circuits) , duty cycle , power (physics) , electronic engineering , computer science , boost converter , power factor , electrical engineering , control theory (sociology) , engineering , physics , control (management) , quantum mechanics , artificial intelligence
SUMMARY This paper presents a new single‐stage single‐switch high power factor correction AC/DC converter suitable for low‐power applications (< 150 W) with a universal input voltage range (90–265 V rms ). The proposed topology integrates a buck–boost input current shaper followed by a buck and a buck–boost converter, respectively. As a result, the proposed converter can operate with larger duty cycles compared with the existing single‐stage single‐switch topologies, hence, making them suitable for extreme step‐down voltage conversion applications. Several desirable features are gained when the three integrated converter cells operate in discontinuous conduction mode. These features include low semiconductor voltage stress, zero‐current switch at turn‐on, and simple control with a fast well‐regulated output voltage. A detailed circuit analysis is performed to derive the design equations. The theoretical analysis and effectiveness of the proposed approach are confirmed by experimental results obtained from a 100‐W/24‐V dc laboratory prototype. Copyright © 2011 John Wiley & Sons, Ltd.