Distributed sinusoidal resonant converter with high step-down ratio

Abstract

A novel zero-current switching transformer-based sinusoidal resonant converter topology for point-of-load DC-DC conversion is presented in this paper. A sinusoidal resonant converter within a distributed power system, where high step-down ratios are required, is challenging due to the large parasitic impedance seen by the primary stage. A sinusoidal resonant converter with a distributed topology is introduced here to reduce the transformer turns ratio while maintaining a high step-down ratio. A power efficiency of 89.8% is achieved. The proposed distributed converter is highly scalable and exhibits sinusoidal current and voltage waveforms with low current spikes. Application to systems-in-package, wireless devices, and IoT is expected due to the low EMI and high efficiency characteristics of this distributed converter system.