@misc{10481/87692,
year = {2021},
month = {4},
url = {https://hdl.handle.net/10481/87692},
abstract = {—In this article, a power converter based on an asymmetrical half-bridge flyback topology is analyzed and optimized for
small form factor and fast-charging power adaptors. Two resonant
control methods, taking advantage of the forward and flyback
characteristics of the converter, as well as the benefits of each of
them depending of the operation point are discussed. The analysis
is nourished with the equivalent circuits in each phase of operation
and the equations that define them. Particularly innovative is the
proposed zero voltage resonant valley switching control method for
the mentioned converter; in this case, it is operated similarly to a
flyback converter, allowing safe output voltage ramp up, which is
one of the challenges that has limited the usage of this topology up to
now. The manuscript also describes how to achieve high efficiency
and power density using zero-voltage switching and zero-current
switching techniques over the full range of the input voltage and
the output load. Finally, the advantages of the proposed control
methods are demonstrated in a 65-W adaptor prototype achieving
a peak efficiency over 94.6% and an efficiency of 93.8% @ Vac ≥
100 V at full load over the range of the input voltage, as well as a
world-class power density of 35 W/in3 uncased},
organization = {his work was supported by Infineon Technologies AG by Contract OTRI 3770-05 and Contract OTRI 3770-04},
publisher = {IEEE TRANSACTIONS ON POWER ELECTRONICS},
keywords = {Adaptor},
keywords = {efficiency},
keywords = {flyback},
keywords = {MOSFET},
keywords = {power density},
title = {Advanced control methods for Asymmetrical Half-bridge Flyback},
doi = {10.1109/TPEL.2021.3077184},
author = {Medina García, Alfredo and Romero Maldonado, Francisco Javier and Morales Santos, Diego Pedro and Rodríguez Santiago, Noel},
}