Abstract
The objective of this paper is to present a methodology for identifying the current flow in the capacitors of a multiphase buck converter by synchronously measuring the capacitor currents. A multiphase buck converter uses multiple parallel buck converters with different switching times to source a large amount of current. Currents in the primary capacitors of a multiphase buck converter are drawn by all phases of the converter; however, the phases switch asynchronously. Synchronizing to the switching of a specific phase reveals how the current from that phase is distributed among the capacitors throughout a circuit board. The proposed measurement method is illustrated by comparing an initial printed circuit board design to a new design to show the effect of better capacitor placement and the addition of a ground plane. The new design confines the phase currents to the capacitors close to the field effect transistors of the specific phase.
Original language | English |
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Article number | 6880339 |
Pages (from-to) | 1344-1351 |
Number of pages | 8 |
Journal | IEEE Transactions on Electromagnetic Compatibility |
Volume | 56 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Dec 2014 |
Externally published | Yes |
Keywords
- Converter
- dc-dc power converters
- electromagnetic compatibility (EMC)
- electromagnetic interference (EMI)
- magnetic field measurement
- multiphase buck near-field scanning
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering