Flyback converter
![Fig. 1: Schematic of a flyback converter](/Images/godic/202501/13/Flyback_conventions.svg4605.png")
![Fig. 2: The two configurations of a flyback converter in operation: In the on-state, the energy is transferred from the input voltage source to the transformer (the output capacitor supplies energy to the output load). In the off-state, the energy is transferred from the transformer to the output load (and the output capacitor).](/Images/godic/202501/13/Flyback_operating.svg4605.png")
![Fig. 3: Waveform - using primary side sensing techniques - showing the 'knee point'.](/Images/godic/202501/13/Flyback_converter_PSS_kneepoint_trace4605.png")
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. When driving for example a plasma lamp or a voltage multiplier the rectifying diode of the boost converter is left out and the device is called a flyback transformer.