D14.9 - High-Frequency Current-Doubler Rectifier-Based Buck Capacitive-Isolated Converter

Thursday, March 26, 2026

12:00 PM - 1:45 PM CT

Location: Hemisfair Ballroom

Technical Dialogue Presenter(s)

Manaya Makino

nagaoka university of technology

Presentation

Co-Author(s)

RK

Rintaro Kusui

nagaoka university of technology
Kodai Nishikawa, PhD (he/him/his)

Nagaoka University of Technology
Hiroki Watanabe, PhD

Nagaoka University of Technology
Jun-ichi Itoh, PhD (he/him/his)

Nagaoka University of Technology
KN

Kenichi Nagayoshi

Dept. of Engineering Electronics Division Toyota Industries Corporation
KN

Koki Nagae

Dept. of Engineering Electronics Division Toyota Industries Corporation
TS

Takehiko Sumida

Dept. of Engineering Electronics Division Toyota Industries Corporation

This paper proposes a buck-type capacitive isolated DC–DC converter without a magnetic transformer. The proposed topology operates as a current-doubler rectifier (CDR) to achieve a high step-down ratio for low DC voltage applications. A design method for the isolation capacitance and output inductance is also presented to achieve MHz operation. The experimental results show the steady-state operation of the proposed converter. Moreover, a maximum efficiency of 89.7% was confirmed with 1 MHz switching frequency.