Paper Info
Title
A Flyback Converter With Novel Active Dissipative Snubber
Abstract
The active clamp flyback converters (ACF) can provide features of high power density and high power efficiency. However, ACF is usually applied to in the applications of medium-to-high power range. For a low power application, the ACF may not be a cost-efficient choice. The flyback converter with a lossless snubber can provide high efficiency for low-power application, but it needs an additional inductor and generates more electromagnetic interference (EMI) emissions. The circuit designers also consider the balance between conversion efficiency, size, and cost. Based on the reasons above, the flyback converter with dissipative RCD snubber is still popular in the applications of low-to-medium power range. When the dissipative snubber is adopted to reduce EMI in the power converters, it increases the loss and hence reduces the efficiency. In this paper, a new concept, called active dissipative snubber, is proposed to suppress the resonance in the discontinuous conduction mode (DCM). In the proposed active dissipative snubber, the digital controller activates the dissipative snubber only when the EMI noise is occurring, then disabled after the noise is decayed or disappears. Digital logic makes the passive snubber smart, which can selectively absorb the EMI noise. Since the proposed snubber is not connected to the main circuit all the time, it can provide lower power loss, but still performs better EMI emissions and maintains conversion efficiency.
Year
DOI
Venue
2022
10.1109/ACCESS.2022.3204872
IEEE ACCESS
Keywords
DocType
Volume
Snubbers, Electromagnetic interference, Buck converters, Clamps, Switches, Integrated circuits, Windings, Energy efficiency, Density measurement, Inductors, Dissipative snubber, lossless snubber, flyback converter, EMI
Journal
10
ISSN
Citations 
PageRank 
2169-3536
0
0.34
References 
Authors
0
2
Name
Order
Citations
PageRank
Yeu-Torng Yau100.34
Tsung-Liang Hung200.34