A Pattern-Based Analytical Method for Impedance Calculation of the Power Distribution Network in Mobile Platforms

A power distribution network (PDN) is essential in electronic systems to provide reliable power for load devices. With faster load transient current and lower voltage tolerance margin for microprocessors in mobile platforms, it is crucial to optimize the printed circuit board (PCB) design to satisfy...

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Bibliographic Details
Published inIEEE transactions on electromagnetic compatibility Vol. 63; no. 3; pp. 912 - 921
Main Authors Sun, Jingdong, Wang, Hanfeng, Wu, Ken, Fan, Jun
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Capacitors
Cell phones
Circuit boards
Circuit design
Design methodology
Design optimization
Electric power distribution
Electronic systems
Equivalent circuits
Impedance
Inductance
Integrated circuit modeling
Layout
Mathematical analysis
Microprocessors
Mobile handsets
mobile platform
Modelling
Pattern analysis
pattern-based analytical modeling
Platforms
power distribution network (PDN)
Printed circuits
Transient current
via inductance extraction
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Summary:A power distribution network (PDN) is essential in electronic systems to provide reliable power for load devices. With faster load transient current and lower voltage tolerance margin for microprocessors in mobile platforms, it is crucial to optimize the printed circuit board (PCB) design to satisfy the strict target impedance. Conventional modeling methods become impractical in mobile platforms due to the characteristics of high-density interconnect PCB and limited layout space. To overcome these issues, a pattern-based analytical method for the PDN impedance calculation is presented in this article. Based on the localized patterns formulated by the relative relationships between the adjacent vias, parasitic elements are analytically determined for different regions of the entire PCB structure. With the assistance of this method, a practical modeling methodology is developed to construct an equivalent circuit with one-to-one correspondence to the PCB's physical geometry. As a result, the PDN design can be efficiently optimized, especially in the predesign stage, to accelerate the development process. Finally, the proposed method is validated by measurements and full-wave simulations using a real mobile phone PCB in production.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2020.3026048