D24.10 - Circuit-Balanced Flyback Converter Eliminating the Need for an Isolated Auxiliary Supply for Gate Driver IC

Thursday, March 26, 2026

12:00 PM - 1:45 PM CT

Location: Hemisfair Ballroom

Technical Dialogue Presenter(s)

NM

Naoya Miyata, BEng

Nagoya University

Presentation Paper

Co-Author(s)

Yuta Imaeda

Nagoya University
Silumin Sandaru Seneneyak, MA (he/him/his)

Nagoya University
Sihoon Choi, PhD (he/him/his)

Nagoya University
YY

Yu Yonzawa

Institute of Materials and Systems for Sustainability
JI

Jun Imaoka

Nagoya University
MY

Masayoshi Yamamoto

Institute of Materials and Systems for Sustainability, Nagoya University
HN

Hayato Nakamura

Kawasaki Heavy Industries, Ltd.
NY

Naoki Yoshizawa

Kawasaki Heavy Industries, Ltd.
MS

Masashi Sawada

Kawasaki Heavy Industries, Ltd.

Wide-bandgap devices enable high-frequency operation, though their fast switching generates common-mode (CM) noise. Circuit balancing reduces CM noise in flyback converters by maintaining circuit symmetry. However, the balanced structure causes the source potential of the switching devices to fluctuate, requiring the gate-driver IC to use an isolated auxiliary supply. This not only diminishes the advantages of the flyback converter but also introduces additional noise paths. This paper proposes a balanced flyback converter that eliminates the need for an isolated auxiliary supply by reusing the surge energy absorbed by the snubber circuit. The proposed method is validated through experiments, confirming stable gate-drive operation and effective CM noise reduction.