Design of a BUCK Converter Achieving TCM-ZVS via V2C Control
DOI:
https://doi.org/10.61173/v1h6vw34Keywords:
BUCK converter, Triangular Current Mode (TCM), V2C Control, zero-voltage switching (ZVS)Abstract
By analyzing the simplified MOSFET equivalent output capacitance (Coss) model, the minimum reverse current required for soft switching and the corresponding dead time in a synchronous BUCK converter operating in Triangular Current Mode (TCM) are calculated. A readily implementable peak-current control strategy is adopted to achieve zero-voltage switching (ZVS) under TCM. Furthermore, a V2C control method is employed to introduce appropriate slope compensation to the control voltage, effectively eliminating subharmonic oscillations when the duty cycle D>0.5 . The calculated values are verified through simulations in MATLAB/Simulink. Ultimately, a synchronous BUCK converter with a wide output voltage range is designed, which achieves ZVS across the entire operating range in TCM, minimizes inductor current ripple, and features a simple control scheme.
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