Improving the efficiency and dynamics of 3D integrated POL

Hou, Dibo; Su, Yipeng; Li, Qiang; Lee, Fred C.

doi:10.1109/apec.2015.7104344

Cited by 18 publications

(2 citation statements)

References 11 publications

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“…The use of wide-band gap power transistors switched at above 1 MHz with soft-switching topology is favorable to reduce the size of passive components and thus to make it possible to embed passives into PCB substrate [3], [4]. Two methods for fabrication of PCB embedded transformers have been reported in [5]- [7]. The first approach introduces the use of a toroidal-shape core inside a PCB.…”

Section: Introductionmentioning

confidence: 99%

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2 MHz high-density integrated power supply for gate driver in high-temperature applications

Perrin

Allard

Buttay

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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International audienceA PCB embedded transformer for harsh environment (i.e., ambient temperature above 200 • C) applications is presented and used in the design of a 2 MHz integrated power-supply prototype for gate driver. The main benefits of using this developed PCB embedding process are the capability to customize the air-gap for the flyback transformer and volume reduction for the converter. The easy modulation of the air-gap distance can be achieved using PCB material in specfic thickness. Moreover, the design of a coplanar-winding transformer structure with very low inter-winding capacitance needs a large winding area and raises the interest for the PCB integration approach. Two-machined ferrite pieces in UI shape were sandwiched into a multi-layer PCB laminate with multiple pressing processes. A converter prototype built with the PCB embedded transformer and other components (GaN transistors, gate driver and passives) mounted above it shows 72% of power efficiency. One thousand thermal cycles between −55 • C and 200 • C were performed on the PCB embedded transformer without observation of any major defects, such as delamination and cracking. The thermal reliability test validates the compatibility between the selected ferrite core and PCB materials as well as the feasibility of this developed transformer embedding method. A three-time volume reduction is achieved when comparing with a benchmark converter prototype using discrete transformer

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Section: Introductionmentioning

confidence: 99%

“…A series of studies have been performed on the realization of [10] ; b) Integrated flyback dc-dc converter built using ferrite-based LTCC materials [11] multi-megahertz integrated POL converter with LTCC planar inductor and GaN devices [3], [7], [9]. Fig.…”

Section: Introductionmentioning

confidence: 99%