A Parametric Conducted Emission Modeling Method of a Switching Model Power Supply (SMPS) Chip by a Developed Vector Fitting Algorithm

Abstract

This paper proposes a modeling method to establish a parametric-conducted emission model of a switching model power supply (SMPS) chip through a developed vector fitting algorithm. A common SMPS chip LTM8025 was taken as an example to explain the modeling process. According to the integrated circuit (IC) electromagnetic modeling (ICEM) standard, the parametric conducted emission model is divided into two parts: IC internal activity (ICIA) and IC passive distribution network (ICPDN). The parameters of ICIA are identified by measured data and correlated with key components; an improved vector-fitting algorithm is proposed to solve the fitting problem of ICPDN without phase information. This parametric model can be used with commercial simulation software together to achieve predictions of conducted emissions from power modules. The experiment results show that the maximum and 90% confidence interval of the forecast errors are 9.677 dB and (−4.56 dB, 6.52 dB) respectively, which achieve the international standard requirements and have sufficient accuracy and effectiveness.

Power Converters in Power Electronics: Current Research Trends

“…In addition to the research in the inverter topologies, this issue has collected important research on isolated [17,18] and non-isolated [19][20][21][22] DC-DC power converters and rectifiers [23,24]. In Reference [17], a comparative evaluation of some wide-range soft-switching full-bridge modular multilevel DC-DC converters is discussed.…”

“…A power-based space vector modulation technique for a matrix rectifier is proposed in [23], where the modulation index and applied phase are calculated, based on the active and reactive power of the rectifier for intuitive power factor control. In Reference [24], a modeling method is introduced to establish a parametric-conducted emission model of a switching model power supply chip through a developed vector fitting algorithm.…”

“…Various power converter topologies for different applications, such as wireless power transfer [25,26], battery charging [27,28], static synchronous compensator (STATCOM) [29], and gate driver [30] are presented in this issue. In Reference [24], an inductive power transfer (IPT) system with three-bridge switching compensation topology is proposed, to achieve the load-independent constant current (CC) and load-independent constant voltage (CV) outputs. In Reference [25], a generalized fractional-order wireless power transmission is established for medium and long-range wireless power transmission.…”

Research on Anti-Radiation Noise Interference of High Definition Multimedia Interface Circuit Layout of a Laptop

“…Currently, there is only limited literature that has focused on the problems caused by electromagnetic interference [1][2][3][4][5], which is a challenge faced by every single electronics developer. The design of electronic devices is subject to various limitations in the initial stage, which increases the difficulty that arises from reaching a balance between the quality of signal and electromagnetic interference.…”