Modeling and Experimental Verification of a Single-Switch Quadratic Boost DC–DC Converter with High Voltage Gain for Energy Harvesting

Niloufar Dizangian, Slavisa Jovanovic and Philippe Poure ()
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Niloufar Dizangian: Université de Lorraine, CNRS, IJL, F-54000 Nancy, France
Slavisa Jovanovic: Université de Lorraine, CNRS, IJL, F-54000 Nancy, France
Philippe Poure: Université de Lorraine, CNRS, IJL, F-54000 Nancy, France

Energies, 2025, vol. 18, issue 20, 1-31

Abstract: This paper presents an enhanced non-isolated single-switch quadratic boost DC-DC converter. The proposed topology employs a single active switch, two inductors, two capacitors, and three diodes. The proposed design improves system reliability by replacing one of the active switches in a conventional cascaded boost converter with a diode. Two key features of this converter are its single switch, which simplifies operation, and the use of a lifting capacitor for voltage step-up. The reduced switch count and the use of Schottky diodes minimize switching losses and enhance overall efficiency. Comprehensive theoretical steady-state analysis under continuous conduction mode (CCM) is carried out to characterize the converter’s performance. Notably, at a 50% duty cycle, the converter achieves a voltage gain of four, while at a 70% duty cycle, it can reach a voltage gain of approximately 11. The proposed topology is validated through extensive simulations in MATLAB/Simulink (2023). In addition, a prototype with a 5 V input and 20 V output at a switching frequency of 50 kHz was constructed and tested. The experimental unit achieved an efficiency of about 85% at a 5 V input. The results confirm that the converter achieves high voltage gain and improved efficiency, making it well-suited for IoT and energy harvesting applications.

Keywords: non-isolated DC-DC converter; cascaded converters; quadratic boost converter; single-switch topology; high voltage gain; voltage stress; energy harvesting; CCM; converter efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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