Achieving High Input PF for CRM Buck-Buck/Boost PFC Converter

When the on-time is constant during a line cycle, the input power factor (PF) of critical conduction mode buck-buck/boost power factor correction converter is low. A variable on-time control (VOTC) scheme is put forward in this paper to realize high PF. By utilizing the input and output voltage to m...

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Veröffentlicht in:	IEEE access 2018, Vol.6, p.79082-79093
Hauptverfasser:	Memon, Abdul Hakeem, Baloach, Mazhar Hussain, Sahito, Anwar Ali, Soomro, Amir Mahmood, Memon, Zubair Ahmed
Format:	Artikel
Sprache:	eng
Schlagworte:	Buck converters Buck-buck/boost converter constant on-time control (COTC) Converters critical conduction mode (CRM) Customer relationship management Electric potential Harmonic analysis Harmonic distortion Inductors Power factor Power harmonic filters Switches Switching circuits variable on-time control (VOTC) Voltage
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Beschreibung
Zusammenfassung:	When the on-time is constant during a line cycle, the input power factor (PF) of critical conduction mode buck-buck/boost power factor correction converter is low. A variable on-time control (VOTC) scheme is put forward in this paper to realize high PF. By utilizing the input and output voltage to modulate the on-time of buck and buck/boost switch, we can realize high-input PF with low-total harmonic distortion within the universal input voltage range. The operating principles and the comparative analysis of the converter with conventional constant on-time control (COTC) and VOTC are analyzed. The proposed control scheme achieves high PF and efficiency as compared with the COTC. A 100-W prototype was built up to verify the effectiveness of the proposed control strategy.
ISSN:	2169-3536 2169-3536
DOI:	10.1109/ACCESS.2018.2879804