Abstract
Active-clamp flyback converter is very popular as soft-switching technique is realized at very high frequency. In most conditions, opto-coupler, which suffers the non-linearity and temperature drift, is applied to realize feedback of the output signals. To eliminate the opto-coupler and simplify the control, an output current prediction scheme is proposed for primary-side regulation active-clamp (PSRAC) flyback converter in this paper. In this scheme, the integration of the auxiliary winding voltage is adopted to emulate the magnetizing current and the accurate output diode current can be acquired by subtracting the primary current from the magnetizing current. The proposed PSR control scheme, which contains the detailed output current prediction strategy and estimation circuit, is presented. Finally, a 21V/3A laboratory prototype has been built up and experimental results show that the flyback prototype can achieve±3% accuracy of output current.
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.
