SMPS Ringing Noise Modeling and Managing Methodology for RFI Solutions in Mobile Platforms

Abstract

In mobile platforms, RF interference issues caused by the switched-mode power supply (SMPS) ringing noise often arise in the on-the-go mode and the charging mode of the interface power management integrated circuits. In this paper, we introduce the modeling method for the SMPS ringing noise in the conventional two-level dc-dc converters and then, based on the modeling insight from the two-level dc-dc converter, we investigate and validate the modeling of the SMPS ringing noise in the three-level buck converters, which are newly adopted SMPSs for fast charging in mobile devices. To reduce such noise, we propose the novel SMPS noise-managing methodologies that handle the printed-circuit-board-level design optimization in mobile devices.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Mobile platform; RF interference (RFI); Ringing noise; Switched-mode power supply (SMPS)

International Standard Serial Number (ISSN)

2156-3950; 2156-3985

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Apr 2018

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