Work

An Adaptive Zero Current Switching Control Technique for Multi-Resonant Switched-Capacitor Converters

Year: 2025

Type: conference-paper

Abstract: Combining energy dense capacitors with efficient switch utilization, resonant switched-capacitor (ReSC) converters have gained popularity due to their ability to simultaneously achieve high efficiencies and high power densities. Multi-phase ReSC converters, here referring to topologies that operate with more than two operating circuit states, are especially attractive as they can achieve high conversion ratios with a fewer number of capacitors and switches than conventional two-phase ReSC converters. However, the topological complexity of these converters, combined with real-world circuit non-idealities, make the phase timings required to operate at resonance challenging to estimate with precision. Here, we present an adaptive control technique that can dynamically track and converge to zero current switching (ZCS) operation to achieve high performance, and facilitate larger scale adoption of these topologies. The concept was validated on a high-performance 48-to-6 V hardware prototype, where the proposed active control technique achieved nearly 20% reduction in power loss at the highest tested load (30 A) when compared with conventional open-loop control.

Source: IEEE Applied Power Electronics Conference and Exposition (APEC)

DOI: 10.1109/apec48143.2025.10977221

Authors: Haifah B. Sambo, Rose A. Abramson, Sahana Krishnan, Robert C. N. Pilawa-Podgurski

Institution: University of California, Berkeley

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: green

Funder: National Science Foundation