Limit-Cycle Based Auto-Tuning System for Digitally Controlled Low-Power SMPS

This paper presents a new method and system for the parameter extraction and dynamic auto-tuning of low power digitally controlled dc-dc switch-mode power supplies (SMPS). During a short-lasting test phase, SMPS parameters, such as output capacitance and load, are estimated by examining the amplitud...

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Bibliographic Details
Published inTwenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06 pp. 1143 - 1147
Main Authors Zhenyu Zhao, Huawei Li, Feizmohammadi, A., Prodic, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2006
Subjects
Amplitude estimation
Automatic control
Capacitance
Control systems
Digital control
Frequency estimation
Limit-cycles
Parameter extraction
Switched-mode power supply
Testing
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Summary:This paper presents a new method and system for the parameter extraction and dynamic auto-tuning of low power digitally controlled dc-dc switch-mode power supplies (SMPS). During a short-lasting test phase, SMPS parameters, such as output capacitance and load, are estimated by examining the amplitude and frequency of intentionally introduced limit cycle oscillations. Then, accordingly, the digital compensator of SMPS is automatically tuned to improve the output regulation and dynamic performance. The effectiveness of the method is demonstrated on an experimental 200 kHz, 12V-to-5 V, 10 W, digitally controlled buck converter
ISBN:9780780395473
0780395476
ISSN:1048-2334
DOI:10.1109/APEC.2006.1620682