Abstract
This study proposes a power factor correction (PFC) flyback converter, which uses film capacitors with longer lifespans instead of the existing electrolytic capacitor. Additionally, it adopts a coupled inductor and an LC resonance filter to mitigate the output ripple, which is inevitably generated by a film capacitor, and applies discontinuous conduction mode (DCM) for power factor correction. In contrast, this study measures the input and output voltages of the PFC flyback converter and the switching current for the DCM control and proposes a duty split method by adding a comparator and triangle wave to the control algorithm to reduce the current stress imposed on the components. Therefore, to validate the usefulness of the proposed DCM flyback converter with the coupled LC resonance filter, this study models the proposed DCM flyback converter and implements a test device with the same configuration, and subsequently evaluates the simulation and test results.
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