Ripple cancellation technique applied to a synchronous buck converter to achieve very high bandwidth and very high efficiency envelope amplifier

Díaz López, Daniel and García Suárez, Oscar and Oliver Ramírez, Jesús Angel and Alou Cervera, Pedro and Cobos Márquez, José Antonio (2013). Ripple cancellation technique applied to a synchronous buck converter to achieve very high bandwidth and very high efficiency envelope amplifier. In: "Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE", 17/03/2013 - 21/03/2013, Long Beach (California, USA). ISBN 978-1-4673-4355-8/13. pp..

Description

Title: Ripple cancellation technique applied to a synchronous buck converter to achieve very high bandwidth and very high efficiency envelope amplifier
Author/s:
  • Díaz López, Daniel
  • García Suárez, Oscar
  • Oliver Ramírez, Jesús Angel
  • Alou Cervera, Pedro
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE
Event Dates: 17/03/2013 - 21/03/2013
Event Location: Long Beach (California, USA)
Title of Book: Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE
Date: 2013
ISBN: 978-1-4673-4355-8/13
Subjects:
Freetext Keywords: power amplifiers;power convertors;64QAM signal;current ripple cancellation technique;frequency 4 MHz;large signal bandwidth;ripple cancellation circuit;switching frequency;synchronous buck converter;very high bandwidth envelope amplifier;very high efficiency envelope amplifier
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

This work presents a single stage converter for a high bandwidth and a high efficiency envelope amplifier. The current ripple cancellation technique is applied to a synchronous buck converter to cancel the output current ripple and to decrease the switching frequency without a reduction in the large signal bandwidth. The converter is modeled and the new design with ripple cancellation circuit is detailed. The advantages of the proposed design are presented and validated experimentally. The transfer function of the output filter of the buck converter with ripple cancellation circuit has been modeled and compared to measurements, showing a good correspondence. Experimental validation is provided at 4MHz of switching frequency for DC and variable output voltage for a sinusoidal and a 64QAM signal. Additional experimental validation of the efficiency improvement is provided, compared to the equivalent design (same bandwidth and output voltage ripple) of the conventional buck converter.

More information

Item ID: 30183
DC Identifier: http://oa.upm.es/30183/
OAI Identifier: oai:oa.upm.es:30183
Official URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6520580&isnumber=6520164
Deposited by: Memoria Investigacion
Deposited on: 14 Nov 2014 16:30
Last Modified: 14 Nov 2014 16:30
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