Modeling and Operation of Resonant Switched-Capacitor DC-DC Converters Regulated by Switch Conductance under Overdamped Conditions

Adrian Gehl; Bernhard Wicht

doi:10.1109/COMPEL57166.2025.11121263

Modeling and Operation of Resonant Switched-Capacitor DC-DC Converters Regulated by Switch Conductance under Overdamped Conditions

Adrian Gehl^*
, Bernhard Wicht

^*Corresponding author for this work

Institute of Microelectronic Systems

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Abstract

Switch conductance regulation is used in favor over dynamic off-time modulation in resonant SC DC-DC converters due to its smaller output voltage ripple and operation at a constant frequency. However, at light load the resonant oscillations are significantly damped because of the increased on resistance R_dson of the power switches. A modeling approach is presented and experimentally verified showing that under these conditions it is beneficial to scale both R_dson and the switching frequency f_switch to further reduce switching losses while still maintaining a reasonably small output voltage ripple.

Original language	English
Title of host publication	2025 IEEE 26th Workshop on Control and Modeling for Power Electronics, COMPEL 2025
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9798331527020
ISBN (Print)	979-8-3315-2703-7
DOIs	https://doi.org/10.1109/COMPEL57166.2025.11121263
Publication status	Published - 22 Jun 2025
Event	26th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2025 - Knoxville, United States Duration: 22 Jun 2025 → 26 Jun 2025

Conference

Conference	26th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2025
Abbreviated title	COMPEL 2025
Country/Territory	United States
City	Knoxville
Period	22 Jun 2025 → 26 Jun 2025

Keywords

DC-DC converter
regulation
resonant
switch conductance
Switched-capacitor

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering
Control and Optimization
Modelling and Simulation

Access to Document

10.1109/COMPEL57166.2025.11121263

Cite this

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title = "Modeling and Operation of Resonant Switched-Capacitor DC-DC Converters Regulated by Switch Conductance under Overdamped Conditions",

abstract = "Switch conductance regulation is used in favor over dynamic off-time modulation in resonant SC DC-DC converters due to its smaller output voltage ripple and operation at a constant frequency. However, at light load the resonant oscillations are significantly damped because of the increased on resistance Rdson of the power switches. A modeling approach is presented and experimentally verified showing that under these conditions it is beneficial to scale both Rdson and the switching frequency fswitch to further reduce switching losses while still maintaining a reasonably small output voltage ripple.",

keywords = "DC-DC converter, regulation, resonant, switch conductance, Switched-capacitor",

author = "Adrian Gehl and Bernhard Wicht",

note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 26th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2025, COMPEL 2025 ; Conference date: 22-06-2025 Through 26-06-2025",

year = "2025",

month = jun,

day = "22",

doi = "10.1109/COMPEL57166.2025.11121263",

language = "English",

isbn = "979-8-3315-2703-7",

booktitle = "2025 IEEE 26th Workshop on Control and Modeling for Power Electronics, COMPEL 2025",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

address = "United States",

}

Gehl, A & Wicht, B 2025, Modeling and Operation of Resonant Switched-Capacitor DC-DC Converters Regulated by Switch Conductance under Overdamped Conditions. in 2025 IEEE 26th Workshop on Control and Modeling for Power Electronics, COMPEL 2025. Institute of Electrical and Electronics Engineers Inc., 26th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2025, Knoxville, Tennessee, United States, 22 Jun 2025. https://doi.org/10.1109/COMPEL57166.2025.11121263

Modeling and Operation of Resonant Switched-Capacitor DC-DC Converters Regulated by Switch Conductance under Overdamped Conditions. / Gehl, Adrian; Wicht, Bernhard.
2025 IEEE 26th Workshop on Control and Modeling for Power Electronics, COMPEL 2025. Institute of Electrical and Electronics Engineers Inc., 2025.

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

TY - GEN

T1 - Modeling and Operation of Resonant Switched-Capacitor DC-DC Converters Regulated by Switch Conductance under Overdamped Conditions

AU - Gehl, Adrian

AU - Wicht, Bernhard

PY - 2025/6/22

Y1 - 2025/6/22

N2 - Switch conductance regulation is used in favor over dynamic off-time modulation in resonant SC DC-DC converters due to its smaller output voltage ripple and operation at a constant frequency. However, at light load the resonant oscillations are significantly damped because of the increased on resistance Rdson of the power switches. A modeling approach is presented and experimentally verified showing that under these conditions it is beneficial to scale both Rdson and the switching frequency fswitch to further reduce switching losses while still maintaining a reasonably small output voltage ripple.

AB - Switch conductance regulation is used in favor over dynamic off-time modulation in resonant SC DC-DC converters due to its smaller output voltage ripple and operation at a constant frequency. However, at light load the resonant oscillations are significantly damped because of the increased on resistance Rdson of the power switches. A modeling approach is presented and experimentally verified showing that under these conditions it is beneficial to scale both Rdson and the switching frequency fswitch to further reduce switching losses while still maintaining a reasonably small output voltage ripple.

KW - DC-DC converter

KW - regulation

KW - resonant

KW - switch conductance

KW - Switched-capacitor

UR - https://www.scopus.com/pages/publications/105015989914

U2 - 10.1109/COMPEL57166.2025.11121263

DO - 10.1109/COMPEL57166.2025.11121263

M3 - Conference contribution

AN - SCOPUS:105015989914

SN - 979-8-3315-2703-7

BT - 2025 IEEE 26th Workshop on Control and Modeling for Power Electronics, COMPEL 2025

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 26th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2025

Y2 - 22 June 2025 through 26 June 2025

ER -

Modeling and Operation of Resonant Switched-Capacitor DC-DC Converters Regulated by Switch Conductance under Overdamped Conditions

Abstract

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this