The demand for smaller, lighter, and more efficient AC/DC USB power delivery (PD) chargers is always a challenge for power-supply design engineers. Below 100 W, the quasi-resonant flyback is still the ...

Abstract: This paper investigates the behaviour of DC earth faults and their consequences on the AC side transformer(s) for AC earthed TN-S and IT grids. In hybrid AC/DC grids, a LVDC designer can ...