Full-Range Regulation Method for Half-Bridge Series Resonant Converter

The half-bridge series resonant converters (SRCs) are concerned about stepping down the output voltage to achieve a full-range regulation method. One of the best methods used to achieve a full-range regulation is a fixed on-time modulation method (FTM). The FTM's method main characteristics or features are low current stress and high efficiency. Additionally, zero voltage switching (ZVS) is used to turn-on the transistors and zero current switching (ZCS) is applied to turn-off diodes. Performance analysis is applied by using a MATLAB simulation and theoretical study to get the voltage gain curves, current stresses, and efficiency. Other alternative methods have been implemented, like frequency modulation (FM) and the asymmetrical pulse modulation method (APWM), to compared with our study the FTM method and decide which method can be the best one used in the half-bridge SRC to achieve a full-range regulation.