EMI Characterization of a synchronous DC-DC converter for automotive fuel pump application using different power switches
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Author |
Mohammed Elamine Lahlaci, Mohamed Miloudi, Houcine Miloudi, Abdelkader Gourbi, Mohammed Hamza Bermaki, Mohamed Mankour and Abdelber Bendaoud
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e-ISSN |
1819-6608 |
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On Pages
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1814-1822
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Volume No. |
20
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Issue No. |
20
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Issue Date |
January 20, 2026
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DOI |
https://doi.org/10.59018/1025205
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Keywords |
electromagnetic interference (EMI), electromagnetic compatibility (EMC), DC-DC converter, synchronous switching, common-mode and differential-mode disturbances, automotive power electronics.
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Abstract
The integration of power electronic converters in automotive systems has led to increased challenges in managing Electromagnetic Interference (EMI), particularly in components such as fuel pump drive systems. This paper presents an experimental characterization of conducted EMI-both common-mode (CM) and differential-mode (DM), generated by a synchronous DC-DC converter used to supply a 12V DC motor in a vehicle fuel pump. Two types of power switches, MOSFET and IGBT, are analyzed under identical operating conditions to evaluate their influence on EMI performance. The study is conducted using a dedicated experimental test bench that allows for accurate measurement of EMI emissions in real-world conditions. Results reveal distinct EMI profiles depending on the switching device employed, with the MOSFET configuration showing higher DM noise due to faster switching dynamics, while the IGBT offers a more moderate EMI spectrum. This experimental investigation highlights the importance of switch selection in automotive power electronics and contributes to the design of more EMC-compliant and reliable converter systems for fuel pump applications and beyond.
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