what is a fly back converter
The flyback converter is used in both AC/DC and DC/DC conversion with galvanic isolation between the input and any outputs. The flyback converter is a buck-boost converter with the inductor split to form a transformer, so that the voltage ratios are multiplied with an additional advantage of isolation.herefore the operating principle of both converters is very close: 1  When the switch is closed (top of Fig. 2), the primary of the transformer is directly connected to the input voltage source. 2  When the switch is opened (bottom of Fig. 2), the primary current and magnetic flux drops.