Thermal Design, Optimization, and Packaging of Planar Magnetic Components

Dede, Ercan M.; Gao, Yucheng; Zhou, Yuqing; Sankaranarayanan, Vivek; Zhou, Feng; Maksimović, Dragan; Erickson, Robert W.

doi:10.1109/tcpmt.2021.3105003

Cited by 17 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method enables the computation of a detailed temperature distributions. Many authors have used the FEM to study the thermal performance of planar magnetics [65] - [80].…”

Section: ) Finite Element Modelingmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

2023

View full text Add to dashboard Cite

High-frequency and high-power density converters are essential for many applications such as automotive and more electric aircraft. To improve power density, planar magnetic components are increasingly used in power electronic converters owing to their advantages, such as less high-frequency losses, repeatability, and better thermal performance compared to conventional wound components. Considerable attention has been paid to their electrical performance. However, the thermal aspects are essential for enhancing completely their performance. Currently, there is an increasing interest in these critical aspects of high-density power converters. This paper presents a literature review of studies on the thermal modeling of planar magnetics. The papers were organized according to the model type and analyzed to highlight their merits and limitations. A multicriteria comparison of the studied papers was performed. Moreover, the key points and issues related to the thermal modeling are addressed to guide designers in enhancing the thermal aspects of planar magnetic components.INDEX TERMS Planar magnetics, High frequency magnetics, Thermal modeling, high power density.

show abstract

“…This method enables the computation of a detailed temperature distributions. Many authors have used the FEM to study the thermal performance of planar magnetics [65] - [80].…”

Section: ) Finite Element Modelingmentioning

confidence: 99%

“…A set of ten planar magnetics designed for a 125 kW automotive boost converter was studied in [80]. This study focuses on the packaging and thermal management of magnetic components.…”

Section: ) Finite Element Modelingmentioning

confidence: 99%

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

2023

View full text Add to dashboard Cite

show abstract

“…The electrical parameters of the equivalent electrical circuit are calculated as follows [16][17][18]; (17) tgap is the spacing between primary and secondary coils, relative permittivity of Si3N4 equals to 6.…”

Section: Primary and Secondary Turn's Number Np Nsmentioning

confidence: 99%

“…[17] presented a dimensioning and thermal modelling of a multilayer capacitor at low temperature cofired ceramic intended to be inserted in a low voltage converter. [18] performed a detailed study for designing an integrated structure with a dual-layer microtransformer model associated with two layers of magnetic cores. Their research focused the impact of thickness of a planar coil on the inductance value.…”

mentioning

confidence: 99%

Flyback Micro-Converter Design with an Integrated Octagonal Micro-Transformer for DC-DC Conversion

Derkaoui,

Benhadda

2023

IJEER

View full text Add to dashboard Cite

The work presented in this paper concerns the design of an integrated flyback DC-DC micro-converter operating at high frequencies. The flyback converter consists of only one transformer. The integrated micro-transformer in the flyback micro-converter is composed of two planar stacked coils with spiral octagonal geometry. Basing on Mohan’s method, the geometrical parameters are evaluated. The different parasitic effects created in the stacked layers are grouped perfectly in the equivalent electrical circuit that summarizes all parasitic effects. The integrated micro-transformer is characterized by scattering parameters extraction. The thermal and electromagnetic effects generated in the micro-transformer are illustrated, using finite elements method on COMSOL Multiphysics 5.3 software. To validate the electrical model, the simulation of the flyback micro-converter containing the equivalent electrical circuit of the micro-transformer is established, using PSIM 9.0 software. The gap between the coils is considered as an integrated MIM capacitor created at high frequencies leads to create a low pass micro-filter with the secondary coil.

show abstract

“…The planar topology seamlessly incorporates an air gap in the path of magnetic flux, the air gap causing reluctance to magnetic flux in the core, thereby increasing saturation current and reducing core losses. In the past, the dual-core planar inductors have mainly been demonstrated and studied at the board level [10] [11]. There are only a few dual-core spiral power inductors embedded in the package [12] or interposer [13].…”

Section: Introductionmentioning

confidence: 99%

Design and demonstration of dual-core spiral package-embedded inductors for 48V-to-1V and 12V-to-1V Integrated Voltage Regulators

Avula,

Murali,

Swaminathan

2024

Preprint

View full text Add to dashboard Cite

Integrated voltage regulator (IVR) based power delivery is becoming a necessity in high-performance computing systems. Embedded inductors are key components in such power delivery architectures. In this paper, novel package-embedded inductors using the dual-core spiral topology are designed and demonstrated for 48V-to-1V and 12V-to-1V power conversion applications. This topology consists of a spiral-shaped conductor winding layer sandwiched between dielectric and magnetic core layers. The conductor and dielectric layers separate the cores and act as an air gap for the magnetic flux of the spiral inductor. The air gap causes an increase in the saturation current performance of the inductor. In addition to the single spiral winding, two advanced spiral inductor configurations, namely two spiral windings in series and parallel, are explored. To enable design, monomial analytical expressions for inductance calculations are provided. To evaluate the performance of these designs, three inductors are fabricated with two different magnetic core materials and air gaps. For the large-signal characterization of the fabricated inductors, a current probe-based small-signal resistance scaling methodology is presented. Overall, packageembedded dual-core spiral inductors with a performance of 115 nH inductance with 5 A saturation current and 300 nH inductance with 3.5 A saturation current, occupying a 9 mm 2 area and having 75% to 80% efficiency, are demonstrated.

show abstract

Thermal Design, Optimization, and Packaging of Planar Magnetic Components

Cited by 17 publications

References 20 publications

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

Flyback Micro-Converter Design with an Integrated Octagonal Micro-Transformer for DC-DC Conversion

Design and demonstration of dual-core spiral package-embedded inductors for 48V-to-1V and 12V-to-1V Integrated Voltage Regulators

Contact Info

Product

Resources

About