8.11 A 48V-to-5V Buck Converter with Triple EMI Suppression Circuit Meeting CISPR 25 Automotive Standards

In automotive-used switching regulator applications, the characteristic of extreme conversion ratio (48V to 5V) and high switching frequency (\mathrm{f}_{\mathrm{SW}}) will give rise to considerable electromagnetic interference (EMI) issues, which is a tremendous obstacle to meeting CISPR 25 automot...

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Bibliographic Details
Main Authors: Kao, Yi-Hsiang, Hung, Chieh-Sheng, Chang, Hui-Hsuan, Huang, Wei-Cheng, Guo, Rong-Bin, Tsai, Hsing-Yen, Chen, Ke-Horng, Zeng, Kuo-Lin, Lin, Ying-Hsi, Lin, Shian-Ru, Tsai, Tsung-Yen
Format: Conference Proceeding
Language:English
Subjects:
Electromagnetic interference
Harmonic analysis
Solid state circuits
Switches
Switching frequency
Turning
Voltage control
Online Access:Request full text
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Summary:In automotive-used switching regulator applications, the characteristic of extreme conversion ratio (48V to 5V) and high switching frequency (\mathrm{f}_{\mathrm{SW}}) will give rise to considerable electromagnetic interference (EMI) issues, which is a tremendous obstacle to meeting CISPR 25 automotive standards. As shown in Fig. 8.11.1 (top), if \mathrm{V}_{\text{Battery}} and \mathrm{V}_{\mathrm{SW}} nodes are considered, the EMI problem can be divided into two areas. Region I is caused by \mathrm{f}_{\mathrm{SW}} harmonic tones (
ISSN:2376-8606
DOI:10.1109/ISSCC49657.2024.10454539