Implementation of DC-to-DC Isolated Converter by Using dpa425r for EV Drive

Roshan, M. Maria and Lakshmi, D. and Anand, V. Antony Sahaya (2026) Implementation of DC-to-DC Isolated Converter by Using dpa425r for EV Drive. Journal of Innovation and Technology, 2026 (08). pp. 71-76. ISSN 2805-5179

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Abstract

Electric vehicle (EV) auxiliary systems require compact and efficient isolated DC–DC converters to power low-voltage electronics from intermediate DC buses. This paper presents the implementation of a 30 W isolated forward DC–DC converter using the DPA425R integrated switcher IC for EV auxiliary applications. The converter operates over a 36–75 V DC input range and provides a regulated 5 V isolated output suitable for battery management systems, sensors, and communication modules. The proposed design utilizes the integrated MOSFET, pulse-width modulation control, soft-start operation, thermal shutdown, undervoltage protection, and auto-restart features of the DPA425R to improve reliability under EV operating conditions. Mathematical modelling is incorporated for transformer and output-stage design. Simulation and experimental validation demonstrate output voltage regulation within ±2%, output ripple below 50 mV, and peak efficiency of approximately 88%. Comparative analysis with conventional flyback converters shows improved efficiency, reduced ripple, and better thermal performance. The proposed converter therefore provides a compact and reliable auxiliary power solution for EV applications.

Item Type: Article
Uncontrolled Keywords: Electric vehicle, DC–DC converter, DPA425R, forward converter, auxiliary supply
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Depositing User: Unnamed user with email masilah.mansor@newinti.edu.my
Date Deposited: 13 May 2026 03:48
Last Modified: 13 May 2026 03:48
URI: http://eprints.intimal.edu.my/id/eprint/2323

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