Open AccessSingle‐switch, integrated DC–DC converter for high‐voltage step‐down applications
Author(s) -
Rodrigues de Oliveira Igor,
Silva de Morais Aniel,
Tofoli Fernando Lessa
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5355
Subject(s) - emi , buck converter , ćuk converter , buck–boost converter , forward converter , capacitor , electronic engineering , flyback converter , computer science , electromagnetic interference , boost converter , filter (signal processing) , voltage , electrical engineering , engineering
An integrated non‐isolated DC–DC converter for applications that demand wide conversion range is proposed in this work. Using a technique known as graft scheme, it is possible to design a single‐switch SEPIC‐buck converter, where both the input current and the current supplied to the output stage composed of the filter capacitor and the load are non‐pulsating when operation occurs in continuous conduction mode (CCM). Therefore, minimised electromagnetic interference (EMI) levels result as a consequence. Besides, the converter requires the use of a single active switch connected to the source reference node, without the need for isolated control circuitry, while it is possible to achieve wider conversion ranges than that provided by the classical buck converter. The qualitative and quantitative analysis of the converter is presented, from which it is possible to design and analyse it. Experimental results are discussed in detail to validate the theoretical considerations.