NDLI: System design of a 3D integrated non-isolated Point Of Load converter

Content Provider	IEEE Xplore Digital Library
Author	Ball, A. Lim, M. Gilham, D. Lee, F.C.
Copyright Year	2008
Description	Author affiliation: Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA (Ball, A.; Lim, M.; Gilham, D.; Lee, F.C.)
Abstract	Thermal issues in the design of high-power and small-size non-isolated Point of Load (POL) converters have been significant and are becoming more so. If a heat sink is dispensed with, then a large area of multi-layer PCB material with significant amounts of copper is required for necessary cooling. A high-rate cooling fan is also necessary. So what at first seems like a small and elegant converter becomes bulky and challenging to position in the overall system when its thermal management is taken into account. This work finds a solution to these problems and investigates the use of Low- Temperature Co-fired Ceramic (LTCC) for integrating the inductor with the active stage. A buck POL is used to demonstrate these methodologies. The end result is a POL converter that can achieve full 20 A output current with no need for an external heat sink and no need for a cooling fan while providing a large step-down of 5 V to 1.2 V. High light- load efficiency of 92.2% is achieved and a high power density of 156 $W/in^{3}$ including all the necessary thermal management, in natural convection condition, has been demonstrated.
Starting Page	181
Ending Page	186
File Size	923964
Page Count	6
File Format	PDF
ISBN	9781424418732
ISSN	10482334
DOI	10.1109/APEC.2008.4522719
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-02-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heat sinks Thermal management Cooling Ceramics Circuits Copper Electronic packaging thermal management Energy management Switching frequency Inductance
Content Type	Text
Resource Type	Article

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