Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC Converters
A solution architecture for monolithic system-on-chip (SoC) power conversion is in high demand to enable modern electronics with a reduced footprint and increased functionality. A promising solution is to reduce the microinductor size by using novel magnetically-enhanced 3-D design topologies. This...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9863824/ |
| _version_ | 1811274776984944640 |
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| author | Chandra Shetty Daniel C. Smallwood |
| author_facet | Chandra Shetty Daniel C. Smallwood |
| author_sort | Chandra Shetty |
| collection | DOAJ |
| description | A solution architecture for monolithic system-on-chip (SoC) power conversion is in high demand to enable modern electronics with a reduced footprint and increased functionality. A promising solution is to reduce the microinductor size by using novel magnetically-enhanced 3-D design topologies. This work presents the design, modeling, and analysis of a 3-D spiral inductor with magnetic thin-films for power supply applications in the frequency range of 3–30 MHz. A closed-form analytical expression is derived for the inductance, including both the air- and magnetic-core contributions. To validate the air-core inductance model, we implement a 3-D spiral inductor on PCB. The theoretical calculation of air-core inductance is in good agreement with experimental data. To validate the inductance model of the magnetic-core, a 3-D spiral inductor is modeled with Ansys Maxwell electromagnetic field simulation software. A winding AC resistance model is additionally presented. We perform a design space exploration (DSE) to investigate the significance of the 3-D spiral inductor structure. Two important performance parameters are discussed: dc quality factor <inline-formula> <tex-math notation="LaTeX">$(Q_{dc})$ </tex-math></inline-formula> and ac quality factor <inline-formula> <tex-math notation="LaTeX">$(Q_{ac})$ </tex-math></inline-formula>. Also, a 3-D spiral inductor structure with magnetic thin-films is characterized in Ansys Maxwell to estimate its potential, and a novel fabrication method is proposed to implement this inductor. The measured relative permeability (<inline-formula> <tex-math notation="LaTeX">$\mu _{r}$ </tex-math></inline-formula>) and the magnetic loss tangent (<inline-formula> <tex-math notation="LaTeX">$tan~\delta $ </tex-math></inline-formula>) of Co-Zr-Ta-B magnetic thin-films, developed in-house, are used to simulate the proposed structure. The promising results of the DSE can be easily extended to improve the performance of other 3-D inductor topologies, such as the solenoid and the toroid. The numerical simulations reveal that the 3-D spiral inductor with magnetic thin-films has the potential to demonstrate a figure-of-merit (FOM) that is significantly higher than traditional inductors. |
| first_indexed | 2024-04-12T23:26:10Z |
| format | Article |
| id | doaj.art-7d31f9b8b39a4ec5a9b028e46895a62e |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-12T23:26:10Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-7d31f9b8b39a4ec5a9b028e46895a62e2022-12-22T03:12:25ZengIEEEIEEE Access2169-35362022-01-0110921059212710.1109/ACCESS.2022.32003359863824Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC ConvertersChandra Shetty0https://orcid.org/0000-0003-0373-466XDaniel C. Smallwood1https://orcid.org/0000-0001-6244-3374Micro and Nano Systems Centre, Tyndall National Institute, University College Cork, Cork 21, IrelandMicro and Nano Systems Centre, Tyndall National Institute, University College Cork, Cork 21, IrelandA solution architecture for monolithic system-on-chip (SoC) power conversion is in high demand to enable modern electronics with a reduced footprint and increased functionality. A promising solution is to reduce the microinductor size by using novel magnetically-enhanced 3-D design topologies. This work presents the design, modeling, and analysis of a 3-D spiral inductor with magnetic thin-films for power supply applications in the frequency range of 3–30 MHz. A closed-form analytical expression is derived for the inductance, including both the air- and magnetic-core contributions. To validate the air-core inductance model, we implement a 3-D spiral inductor on PCB. The theoretical calculation of air-core inductance is in good agreement with experimental data. To validate the inductance model of the magnetic-core, a 3-D spiral inductor is modeled with Ansys Maxwell electromagnetic field simulation software. A winding AC resistance model is additionally presented. We perform a design space exploration (DSE) to investigate the significance of the 3-D spiral inductor structure. Two important performance parameters are discussed: dc quality factor <inline-formula> <tex-math notation="LaTeX">$(Q_{dc})$ </tex-math></inline-formula> and ac quality factor <inline-formula> <tex-math notation="LaTeX">$(Q_{ac})$ </tex-math></inline-formula>. Also, a 3-D spiral inductor structure with magnetic thin-films is characterized in Ansys Maxwell to estimate its potential, and a novel fabrication method is proposed to implement this inductor. The measured relative permeability (<inline-formula> <tex-math notation="LaTeX">$\mu _{r}$ </tex-math></inline-formula>) and the magnetic loss tangent (<inline-formula> <tex-math notation="LaTeX">$tan~\delta $ </tex-math></inline-formula>) of Co-Zr-Ta-B magnetic thin-films, developed in-house, are used to simulate the proposed structure. The promising results of the DSE can be easily extended to improve the performance of other 3-D inductor topologies, such as the solenoid and the toroid. The numerical simulations reveal that the 3-D spiral inductor with magnetic thin-films has the potential to demonstrate a figure-of-merit (FOM) that is significantly higher than traditional inductors.https://ieeexplore.ieee.org/document/9863824/Power supply on chip (PwrSoC)power supply in package (PwrSiP)3-D spiral inductorpartial inductancedc quality factor (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">Qdc</italic>) |
| spellingShingle | Chandra Shetty Daniel C. Smallwood Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC Converters IEEE Access Power supply on chip (PwrSoC) power supply in package (PwrSiP) 3-D spiral inductor partial inductance dc quality factor (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">Qdc</italic>) |
| title | Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC Converters |
| title_full | Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC Converters |
| title_fullStr | Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC Converters |
| title_full_unstemmed | Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC Converters |
| title_short | Design, Modeling, and Analysis of a 3-D Spiral Inductor With Magnetic Thin-Films for PwrSoC/PwrSiP DC-DC Converters |
| title_sort | design modeling and analysis of a 3 d spiral inductor with magnetic thin films for pwrsoc pwrsip dc dc converters |
| topic | Power supply on chip (PwrSoC) power supply in package (PwrSiP) 3-D spiral inductor partial inductance dc quality factor (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">Qdc</italic>) |
| url | https://ieeexplore.ieee.org/document/9863824/ |
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