Improvement of the Dynamic Performance of a Buck Converter using Controlled Current Source as an Additional Energy Path

Svikovic, Vladimir and Oliver Ramírez, Jesús Angel and Alou Cervera, Pedro and García Suárez, Oscar and Cobos Márquez, José Antonio (2012). Improvement of the Dynamic Performance of a Buck Converter using Controlled Current Source as an Additional Energy Path. In: "Actas del 19th Seminario Anual de Automática, Electrónica Industrial e Instrumentación (SAAEI)", 11/07/2012 - 13/07/2012, Guimaraes (Portugal). pp. 1-5.

Description

Title: Improvement of the Dynamic Performance of a Buck Converter using Controlled Current Source as an Additional Energy Path
Author/s:
  • Svikovic, Vladimir
  • Oliver Ramírez, Jesús Angel
  • Alou Cervera, Pedro
  • García Suárez, Oscar
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: Actas del 19th Seminario Anual de Automática, Electrónica Industrial e Instrumentación (SAAEI)
Event Dates: 11/07/2012 - 13/07/2012
Event Location: Guimaraes (Portugal)
Title of Book: Seminario Anual de Automática, Electrónica Industrial e Instrumentación 2012 (SAAEI’12)
Date: 2012
Subjects:
Faculty: Centro de Electrónica Industrial (CEI) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This work is related to the improvement of the dynamic performance of the Buck converter by means of introducing an additional power path that virtually increase s the output capacitance during transients, thus improving the output impedance of the converter. It is well known that in VRM applications, with wide load steps, voltage overshoots and undershoots ma y lead to undesired performance of the load. To solve this problem, high-bandwidth high-switching frequency power converter s can be applied to reduce the transient time or a big output capacitor can be applied to reduce the output impedance. The first solution can degrade the efficiency by increasing switching losses of the MOSFETS, and the second solution is penalizing the cost and size of the output filter. The additional energy path, as presented here, is introduced with the Output Impedance Correction Circuit (OICC) based on the Controlled Current Source (CCS). The OICC is using CCS to inject or extract a current n - 1 times larger than the output capacitor current, thus virtually increasing n times the value of the output capacitance during the transients. This feature allows the usage of a low frequency Buck converter with smaller capacitor but satisfying the dynamic requirements.

More information

Item ID: 20879
DC Identifier: http://oa.upm.es/20879/
OAI Identifier: oai:oa.upm.es:20879
Official URL: http://saaei.org/edicion12/
Deposited by: Memoria Investigacion
Deposited on: 20 Nov 2013 17:19
Last Modified: 22 Sep 2014 11:21
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