Non-Isolated Direct AC-DC Converter Design with BCM-PFC Circuit

This paper proposes two types of non-isolated direct AC-DC converters. First, it shows a buck-boost converter with an H-bridge, which requires few components (three switches, two diodes, one inductor and one capacitor) to convert AC input to DC output directly. This circuit can handle a wide range of output voltage. Second, a direct AC-DC buck converter is proposed for lower output voltage applications. This circuit is analyzed with output voltage of 12V. We describe circuit topologies, operation principles and simulation results for both circuits.

Authors:

• Y. Kobori
• L. Xing
• H. Gao
• N.Onozawa
• S. Wu
• S. N. Mohyar
• Z. Nosker
• H. Kobayashi
• N. Takai
• K. Niitsu

Keywords:

• AC-DC converter
• Buck-boost converter
• Buck converter
• PFC
• BCM PFC circuit.

References:

[1] L. Xing, H. Gao, Y. Kobori, N. Okamoto, M. Ohshima, K. Wakabayashi,
T. Okada, M. Onozawa, H. Kobayashi, N. Takai and K. Niitsu , "Novel
DC-DC Converter Design," IEE Japan, Papers of Technical Meeting on
Electronic Circuits, ECT-11-047, July 2011, pp. 59-64 (Japanese)
[2] K. Harada, T. Ninomiya and B. Ko, Fundamentals of Switched-Mode
Converters, Corona Publishing Co., LTD. (2004)