Simplified Ripple-Elimination Branch for DC/DC Converters Operating with Constant Duty-Cycle

This paper presents a ripple-free DC/DC converter tailored for fixed duty-cycle applications where current ripple reduction is critical. Conventional interleaved converters achieve ripple mitigation only at specific operating points and require multiple synchronized power legs, while stacked topologies extend cancellation over the full duty-cycle range but rely on series capacitors, large inductors, and high-voltage switches. The proposed solution overcomes these limitations by introducing a ripple cancellation branch that operates without a series capacitor and is electrically decoupled from the main DC-link. This configuration enables the use of small inductors and low-voltage switches while eliminating the need for PWM synchronization. Simulation results confirm that the proposed topology achieves complete ripple suppression with reduced complexity and component stress, making it a compact and efficient alternative for fixed-duty-cycle power conversion.