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Buck power factor correction (PFC) converter is widely used for a broad range of AC/DC applications because of its many advantages However, the traditional discontinuous conduction mode (DCM) buck power factor correction converter (PFC) operates on constant duty-cycle control (CDCC) scheme, due to which its input power factor (PF) is low. For improving PF near to unity, a variable-duty-cycle control (VDCC) method has been proposed. Fitting duty-cycle method is also introduced to make circuit implementation easier. For verifying the validity of proposed technique, the simulation results are carried out.

Achieving high input power factor for DCM Buck PFC converter by variable Duty-Cycle control