Abstract
The critical conduction mode (CRM) boost PFC converter is widely used in low-to-medium power applications due to its low switching loss and simple control. Since input voltage varies sharply near the zero-crossing, where the variable on-time (VOT) control provides a longer on-time to compensate the negative inductor current, it is unprecise to assume that input voltage is constant during the switching period. Aiming at the impact of this unprecise assumption on the input current total harmonic distortion (THD), this paper establishes an accurate VOT table to reduce the input current distortion. Moreover, an input filter capacitor (IFC) current compensation method is also proposed to minimize the phase leading input current (PLIC). The experimental results of the proposed methods are demonstrated on a 160W GaN-based CRM boost PFC prototype. With the proposed methods, the input current THD is only 1.85% at 115VAC and 400Hz input with full load.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
