Integrating Magnetics for On-Chip Power: A Perspective

Sullivan, Charles R.; Harburg, Daniel V.; Qiu, Jizheng; Levey, Christopher G.; Yao, Di

doi:10.1109/tpel.2013.2240465

Cited by 114 publications

(44 citation statements)

References 83 publications

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“…Air-core magnetics offer the advantages of avoiding magnetic core losses as well as avoiding the need for a fabrication process incorporating special materials [5], [42]- [44]. Planar spiral and solenoidal air-core inductors produce significant external fields which may cause losses in nearby conductors and electromagnetic interference problems, but toroidal geometries can mitigate these concerns.…”

Section: A Toroidal Air-core Inductorsmentioning

confidence: 99%

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A Technology Overview of the PowerChip Development Program

Araghchini

Chen

Doan-Nguyen

et al. 2013

IEEE Trans. Power Electron.

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Abstract-The PowerChip research program is developing technologies to radically improve the size, integration, and performance of power electronics operating at up to grid-scale voltages (e.g., up to 200 V) and low-to-moderate power levels (e.g., up to 50 W) and demonstrating the technologies in a high-efficiency light-emitting diode driver, as an example application. This paper presents an overview of the program and of the progress toward meeting the program goals. Key program aspects and progress in advanced nitride power devices and device reliability, integrated highfrequency magnetics and magnetic materials, and high-frequency converter architectures are summarized.Index Terms-Gallium nitride, high frequency (HF), integrated magnetics, integrated power converter, light-emitting diode (LED) driver, PwrSoC.

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Section: A Toroidal Air-core Inductorsmentioning

confidence: 99%

“…As discussed in [42], thin-film magnetic materials make it possible to reduce the height needed to achieve high efficiency in power magnetics. Most soft thin-film magnetic materials that are attractive for power applications exhibit uniaxial anisotropy, and so must be designed for magnetic flux in only one direction [23].…”

Section: B Magnetic-core Inductorsmentioning

confidence: 99%

A Technology Overview of the PowerChip Development Program

Araghchini

Chen

Doan-Nguyen

et al. 2013

IEEE Trans. Power Electron.

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“…Therefore, thin-film fabricated microinductors and microtransformers are ideal components to be used in high switching frequency applications. Both, microinductors and microtransformers are in many research works fabricated and tested at higher switching frequencies up to 50 MHz [1][2][3][4][5][6][7]. Based on these first results, the implementation of micro devices in power electronic applications is expected to be successful.…”

Section: Introductionmentioning

confidence: 99%

On-chip high performance magnetics for point-of-load high-frequency DC-DC converters

Dinulovic

Shousha

Haug

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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This paper presents the design, fabrication, and characterization of on silicon integrated micro-transformers for high frequency power applications. The microtransformer device is used and tested in DC-DC converter application at high switching frequency. This device has stable L vs. f characteristic up to 50 MHz. The design is improved regarding to the electrical resistance and current capability. The microtransformer shows an inductivity of about 60 nH, resistance of 350 mΩ and can be applied for current up to 1.5 A.

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“…Silicon integrated magnetic components are a key bottleneck in realization of PwrSoC due to the issues associated with quality and integration of magnetic materials in the device structure. Air-core inductors built over the silicon substrate is the simplest solution, but large surface area is needed to fulfill the inductance requirements for the converter, along with issues of EMI [2,3]. Thin-film core inductor has been proposed as a promising technology to achieve high efficiency and area effective solutions, [4,5].…”

Section: Introductionmentioning

confidence: 99%

Large-signal power circuit characterization of on-silicon coupled inductors for high frequency integrated voltage regulation

Kulkarni¹,

Pavlovic²,

Kubendran³

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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This work describes in detail the design, fabrication and characterization of on-silicon coupled inductors. The coupled inductors are fabricated using a double metal layer process for improved performance. Further, the fabricated devices are characterized for small signal, dc bias and large signal testing at high frequencies (up to 15 MHz). The small signal testing includes both impedance analyzer and network analyzer results for inductance, saturation and coupling data on the device. The paper further describes the design and set-up for a large signal testing system allowing for accurate measurement of inductor performance. The parameters are extracted from the ratio between the voltage complex amplitude and the current complex amplitude for sinusoidal excitation. The proposed system is suitable to perform the measurements under different large-signal conditions given by the ac current amplitudes ranging from 0 A to 0.5 A, at frequencies up to 15 MHz. From the impedance analyzer tests, a self-inductance of 50 nH and a dc bias current of 600 mA was measured. From the large signal test, an ac resistance of 1.4 Ω was measured at 15 MHz and ac current amplitude of 0.5 A. The measured data were in line with design parameters.

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Integrating Magnetics for On-Chip Power: A Perspective

Cited by 114 publications

References 83 publications

A Technology Overview of the PowerChip Development Program

A Technology Overview of the PowerChip Development Program

On-chip high performance magnetics for point-of-load high-frequency DC-DC converters

Large-signal power circuit characterization of on-silicon coupled inductors for high frequency integrated voltage regulation

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