A physics-based modeling methodology for determining the transient current flow path in multi-layer PI designs is given in this paper using a commercial board with a complicated structure as an example. Board structure analysis is done first to provide a physical basis of post-layout analytical and equivalent circuit modeling. A match of the PDN impedance between commercial tool simulation, post-layout analytical calculation, and the physics-based equivalent circuit modeling was achieved to support the model for the transient simulation. By analyzing the current response in all the vias, a clear representation of transient current flow across all via segments can be given layer-by-layer. The maximum current density in vertical vias can also be extracted in this process, providing a reference for preventing transient overcurrent design.
Y. Ding et al., "Physics-Based Modeling for Determining Transient Current Flow in Multi-Layer Pcb Pi Designs," 2022 IEEE International Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMCSI 2022, pp. 244 - 249, Institute of Electrical and Electronics Engineers, Jan 2022.
The definitive version is available at https://doi.org/10.1109/EMCSI39492.2022.9889600
Electrical and Computer Engineering
Keywords and Phrases
Physics-based Modeling; Power Distribution Network (PDN); Transient Current Flow
International Standard Book Number (ISBN)
Article - Conference proceedings
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01 Jan 2022