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A Novel Phase-Shedding Control Scheme for Improved Light Load Efficiency of Multiphase Interleaved DC–DC Converters

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2 Author(s)
Jen-Ta Su ; Ind. Stand. Server, Hewlett-Packard Co., Taipei, Taiwan ; Chih-Wen Liu

In this paper, a novel phase-shedding control scheme for multiphase interleaved dc-dc converters is proposed to improve the light load efficiency. The proposed phase-shedding scheme is based upon power efficiency estimation with a numerically constructed lookup table and a phase configuration selector to automatically determine the load current point of phase shedding for the minimization of the power loss during the light load condition. The proposed scheme is verified on a three-phase-interleaved dc-dc synchronous buck converter with a 12 V input and 1.2 V, 60 A output. Experimental results are presented to demonstrate the effectiveness of the proposed scheme.

Published in:

Power Electronics, IEEE Transactions on  (Volume:28 ,  Issue: 10 )

Date of Publication:

Oct. 2013

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