A Review of Input Current Ripple Reduction Techniques in Non-Isolated DC–DC Boost Converters

Input current ripple reduction in DC-DC boost converters is a persistent challenge because input current ripples are driving up filter requirements, electromagnetic interference (EMI), and stress on sources and loads. This ultimately limits power density and efficiency in many applications, from photovoltaic systems to fuel cells and electric vehicle powertrains. While classical interleaving and passive filtering approaches have been proposed, recent years have brought promising advances in magnetic coupling, higher switching frequency, novel interleaved topologies, and control-based reduction strategies. The current state of the art offers a solid foundation, and further investigations could help enable a more comprehensive comparison and better guide the selection of the most appropriate approach according to performance objectives. An increasing number of recent publications are focusing on the topic of current ripple reduction. Indeed, a recent analysis of international scientific databases shows a steady increase in publications addressing current ripple in DC-DC converters, reflecting both the intensifying demands of modern power electronics applications and the recognition that traditional solutions may not be the most suitable for next-generation converters and systems. This review fills that gap in the case of DC-DC boost converters, where the literature remains fragmented, and a unified comparison of these approaches is still lacking. It compiles, analyses, and compares all current techniques for reducing input current ripple, covering passive filter and inductor sizing methods, component-level improvements such as coupled inductors and wide-bandgap devices, interleaving-based converter architectures, closed-loop control strategies, and hybrid approaches that combine multiple techniques based on papers published over the last decade (2016–2026). More particularly, the dependence of LC filter sizing on the duty cycle and switching frequency is examined, mutual inductance design for ripple cancellation is explored, and the operation of destructive interference in parallel-phase and multilevel converter configurations is compared. The techniques reviewed in this paper highlight remarkable results: A 60–90% ripple reduction by using magnetic coupling at 50% duty cycle, near-zero input current ripple with multiphase interleaving in N-phase converters with optimal phase shift, and dynamic ripple suppression across wide operating ranges through advanced control. The review concludes with a qualitative comparison of the main input current ripple reduction technique families in terms of advantages, limitations, application domains, and reduction potential, and discusses opportunities for hybrid passive–active strategies in next-generation high-efficiency boost converters.