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Title: Adaptive prediction in digitally controlled buck converter with fast load transient response
Authors: Lee, ATL
Chan, PCH 
Issue Date: 2012
Source: 2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012, 2012, 6251747
Abstract: An adaptive prediction scheme based on linear extrapolation for digitally controlled voltage-mode buck-type switching converter is presented. A major drawback of conventional digitally controlled switching converters is bandwidth limitation due to the additional phase lag in the digital feedback control loop. By predicting the future error voltage, the ADC sampling time delay is compensated in order to achieve a higher bandwidth even with a modest sampling rate. Both simulation and measurement results show that the output voltage settling time of the digitally controlled buck converter is reduced by as much as 28% with the proposed adaptive prediction. The fastest settling time in response to a 600mA load transient is around 15μs, approaching the transient response of the state-of-the-art analog-based controller.
Keywords: Adaptive FIR filter
Adaptive prediction
Buck converter
Digital controller
IIR filter
ISBN: 9781424493739
DOI: 10.1109/COMPEL.2012.6251747
Description: 2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012, Kyoto, 10-13 July 2012
Appears in Collections:Conference Paper

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