• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2019, Volume: 12, Issue: 17, Pages: 1-10

Original Article

Boundary Conduction Mode Modified Buck Converter with Low Input Current Total Harmonic Distortion


Buck Power Factor Correction (PFC) converter is widely used for a broad range of AC/DC applications because of its many advantages like protection against short circuit, high efficiency at universal input voltage, low output voltage, less voltage stress on the switch, low inrush current and low component cast. However the inherent dead zone introduces a large harmonic distortion in the average input current, resulting in a low Power Factor (PF) and high Total Harmonic Distortion (THD). A constant on-time controlled Boundary Conduction Mode (BCM) buck-flyback converter is introduced in this paper. It can achieve low input current THD and high PF. The operating principle of the traditional and proposed converter is discussed and the effectiveness of proposed topology is evaluated by simulation results.

Keywords: Boundary Conduction Mode (BCM), Buck Converter, Power Factor (PF), Total Harmonic Distortion (THD) 


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