Minimum time control for multiphase buck converter: analysis and application

Cheng, Pengming and García Suárez, Oscar and Vasic, Miroslav and Oliver Ramírez, Jesús Angel and Alou Cervera, Pedro and Cobos Márquez, José Antonio (2014). Minimum time control for multiphase buck converter: analysis and application. "IEEE Transactions on Power Electronics", v. 29 (n. 137360); pp. 958-967. ISSN 0885-8993. https://doi.org/10.1109/TPEL.2013.2256798.

Description

Title: Minimum time control for multiphase buck converter: analysis and application
Author/s:
  • Cheng, Pengming
  • García Suárez, Oscar
  • Vasic, Miroslav
  • Oliver Ramírez, Jesús Angel
  • Alou Cervera, Pedro
  • Cobos Márquez, José Antonio
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on Power Electronics
Date: April 2014
ISSN: 0885-8993
Volume: 29
Subjects:
Freetext Keywords: Minimum time control, multiphase converter, voltage variation, charge balance, envelope amplifer
Faculty: Centro de Electrónica Industrial (CEI) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The combination of minimum time control and multiphase converter is a favorable option for dc-dc converters in applications where output voltage variation is required, such as RF amplifiers and dynamic voltage scaling in microprocessors, due to their advantage of fast dynamic response. In this paper, an improved minimum time control approach for multiphase buck converter that is based on charge balance technique, aiming at fast output voltage transition is presented. Compared with the traditional method, the proposed control takes into account the phase delay and current ripple in each phase. Therefore, by investigating the behavior of multiphase converter during voltage transition, it resolves the problem of current unbalance after the transient, which can lead to long settling time of the output voltage. The restriction of this control is that the output voltage that the converter can provide is related to the number of the phases, because only the duty cycles at which the multiphase converter has total ripple cancellation are used in this approach. The model of the proposed control is introduced, and the design constraints of the buck converters filter for this control are discussed. In order to prove the concept, a four-phase buck converter is implemented and the experimental results that validate the proposed control method are presented. The application of this control to RF envelope tracking is also presented in this paper.

More information

Item ID: 26227
DC Identifier: http://oa.upm.es/26227/
OAI Identifier: oai:oa.upm.es:26227
DOI: 10.1109/TPEL.2013.2256798
Official URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6494314
Deposited by: Memoria Investigacion
Deposited on: 12 Apr 2015 11:33
Last Modified: 10 Apr 2019 14:40
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