Advanced Control for Very Fast DC-DC Converters Based on Hysteresis of the C-out Current

Huerta Oliveres, Santa Concepción and Soto de Pecho, Andrés and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and García Suárez, Oscar and Cobos Márquez, José Antonio (2013). Advanced Control for Very Fast DC-DC Converters Based on Hysteresis of the C-out Current. "IEEE Transactions on Circuits and Systems I: Regular Papers", v. 60 (n. 4); pp. 1052-1061. ISSN 1549-8328. https://doi.org/10.1109/TCSI.2012.2209308.

Description

Title: Advanced Control for Very Fast DC-DC Converters Based on Hysteresis of the C-out Current
Author/s:
  • Huerta Oliveres, Santa Concepción
  • Soto de Pecho, Andrés
  • Alou Cervera, Pedro
  • Oliver Ramírez, Jesús Angel
  • García Suárez, Oscar
  • Cobos Márquez, José Antonio
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on Circuits and Systems I: Regular Papers
Date: April 2013
ISSN: 1549-8328
Volume: 60
Subjects:
Freetext Keywords: DC-DC power conversion, dynamic response,non-linear circuits, transient response.
Faculty: E.T.S.I. Industriales (UPM)
Department: Automática, Ingeniería Electrónica e Informática Industrial [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The bandwidth achievable by using voltage mode control or current mode control in switch-mode power supply is limited by the switching frequency. Fast transient response requires high switching frequency, although lower switching frequencies could be more suitable for higher efficiency. This paper proposes the use of hysteretic control of the output capacitor $(C_{out})$ current to improve the dynamic response of the buck converter. An external voltage loop is required to accurately regulate the output voltage. The design of the hysteretic loop and the voltage loop are presented. Besides, it is presented a non-invasive current sensor that allows measuring the current in the capacitor. This strategy has been applied for DVS (dynamic voltage scaling) on a 5 MHz buck converter. Experimental results validate the proposed control technique and show fast transient response from 1.5 V to 2.5 V in 2 $mu{rm s}$.

More information

Item ID: 29495
DC Identifier: http://oa.upm.es/29495/
OAI Identifier: oai:oa.upm.es:29495
DOI: 10.1109/TCSI.2012.2209308
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6324397&sortType%3Dasc_p_Sequence%26filter%3DAND%28p_IS_Number%3A6486561%29
Deposited by: Memoria Investigacion
Deposited on: 11 Nov 2014 15:29
Last Modified: 11 Nov 2014 15:29
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