Non-Isolated Ultra-High Step-Up DC-DC Converter Topology Using Coupled-Inductor-Based Inverting Buck-Boost and Voltage Multipliers

Duong, Van-Tinh; Waheed, Zeeshan; Choi, Woojin

doi:10.3390/electronics14132519

Open AccessArticle

Non-Isolated Ultra-High Step-Up DC-DC Converter Topology Using Coupled-Inductor-Based Inverting Buck-Boost and Voltage Multipliers

by

Van-Tinh Duong

,

Zeeshan Waheed

and

Woojin Choi

^*

School of Electrical Engineering, Soongsil University, Seoul 06978, Republic of Korea

^*

Author to whom correspondence should be addressed.

Electronics 2025, 14(13), 2519; https://doi.org/10.3390/electronics14132519

Submission received: 23 May 2025 / Revised: 16 June 2025 / Accepted: 19 June 2025 / Published: 20 June 2025

(This article belongs to the Special Issue Advanced DC-DC Converter Topology Design, Control, Application)

Download

Browse Figures

Versions Notes

Abstract

This paper introduces a non-isolated ultra-high voltage gain topology using the combination of the coupled-inductor-based inverting buck-boost converter (IBB) and voltage multiplier (VM) structure. In the proposed converter, an ultra-high step-up voltage gain can be achieved with a small duty cycle thanks to a coupled inductor and VMs. The voltage stress and the losses of the switches in the proposed converter are even less than other conventional topologies. Unlike other coupled-inductor topologies, a large voltage spike caused by the leakage inductance of the coupled inductor is smoothed by the capacitor in the voltage multiplier. In addition, zero-voltage switching (ZVS) turn-on for the switches and zero-current switching (ZCS) turn-off for the diodes can be achieved with the energy stored in the leakage inductance. A 360 W (40 V/380 V) prototype converter is implemented to prove the advantages of the proposed converter, with a maximum efficiency of 98.4%.

Keywords: coupled inductor; inverting buck-boost; non-isolated dc–dc converters; ultra-high step-up; ultrahigh voltage gain; voltage multiplier

Share and Cite

MDPI and ACS Style

Duong, V.-T.; Waheed, Z.; Choi, W. Non-Isolated Ultra-High Step-Up DC-DC Converter Topology Using Coupled-Inductor-Based Inverting Buck-Boost and Voltage Multipliers. Electronics 2025, 14, 2519. https://doi.org/10.3390/electronics14132519

AMA Style

Duong V-T, Waheed Z, Choi W. Non-Isolated Ultra-High Step-Up DC-DC Converter Topology Using Coupled-Inductor-Based Inverting Buck-Boost and Voltage Multipliers. Electronics. 2025; 14(13):2519. https://doi.org/10.3390/electronics14132519

Chicago/Turabian Style

Duong, Van-Tinh, Zeeshan Waheed, and Woojin Choi. 2025. "Non-Isolated Ultra-High Step-Up DC-DC Converter Topology Using Coupled-Inductor-Based Inverting Buck-Boost and Voltage Multipliers" Electronics 14, no. 13: 2519. https://doi.org/10.3390/electronics14132519

APA Style

Duong, V.-T., Waheed, Z., & Choi, W. (2025). Non-Isolated Ultra-High Step-Up DC-DC Converter Topology Using Coupled-Inductor-Based Inverting Buck-Boost and Voltage Multipliers. Electronics, 14(13), 2519. https://doi.org/10.3390/electronics14132519

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

Non-Isolated Ultra-High Step-Up DC-DC Converter Topology Using Coupled-Inductor-Based Inverting Buck-Boost and Voltage Multipliers

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI