Abstract
A new driving method for synchronous rectifier (SR) in LLC resonant converter is presented. By adding a zero-crossing noise filter (ZCNF) to the drain and source of the SR FET, the false-triggering of the SR can be effectively eliminated. Moreover, the resistor and the capacitor in the filter can be used as a compensator to solve the duty-cycle loss issue caused by the trace inductance of the MOSFET package. Only three passive components are needed in the proposed filter, which makes it reliable and easy to implement. Simulation and experimental results show that the ZCNF can significantly improve the reliability as well as the efficiency of the power circuit. A prototype of 400 V to 12 V 600-W half-bridge LLC resonant converter is built to verify the advantages of the ZCNF. An efficiency improvement of 0.8% is achieved by the ZCNF.
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.
