Innovative Single Stage Isolated AC/DC Converter with Power Factor Correction

The actual market of low and middle power battery charging power converters is mainly based on two-stage concepts combining PFC and DC/DC converter. The efficiency and power density of those systems are being improved by newer semiconductor technology with higher switching frequency and reduced appearance of switching losses. Adversely newer transistors represent a significant share of device cost and have a negative impact on total cost in case of a sole transistor exchange. This paper describes a perspective way how to minimize the dimension and optimize cost of isolated AC/DC converters by adapting to modern topologies.