Dual-Bridge LLC Resonant Converter with Fixed-Frequency PWM Control for Wide Input Applications

Abstract

This field proposes a dual-bridge (DB) LLC thunderous converter for wide input applications. The topology is a combination of a half-bridge (HB) LLC circuit and a full-bridge (FB) LLC circuit. The fixed frequency beat width-regulated (PWM) control is utilized and a range of double the base input voltage can be secured. Contrasted and the customary heartbeat frequency regulation (PFM) controlled HB/FB LLC full converter, the voltage gain range is free of the quality factor, and the polarizing inductor has little influence on the voltage gain, which can streamline the parameter determination process and benefit the structure of attractive segments too. Over the full load range, zero-voltage Supply (ZVS). ZVS  can be accomplished for essential switches and auxiliary rectifier diodes, separately.