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.
| Original language | English |
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| Title of host publication | 2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012 |
| DOIs | |
| Publication status | Published - 1 Oct 2012 |
| Event | 2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012 - Kyoto, Japan Duration: 10 Jul 2012 → 13 Jul 2012 |
Conference
| Conference | 2012 IEEE 13th Workshop on Control and Modeling for Power Electronics, COMPEL 2012 |
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| Country/Territory | Japan |
| City | Kyoto |
| Period | 10/07/12 → 13/07/12 |
Keywords
- adaptive FIR filter
- Adaptive prediction
- buck converter
- digital controller
- IIR filter
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Modelling and Simulation