DocumentCode :
2797488
Title :
A novel digital capacitor charge balance control algorithm with a practical extreme voltage detector
Author :
Jia, Liang ; Wang, Dong ; Meyer, Eric ; Liu, Yan-Fei ; Sen, Paresh C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada
fYear :
2010
fDate :
12-16 Sept. 2010
Firstpage :
514
Lastpage :
521
Abstract :
Dc-dc Buck converter has a major application for powering integrated circuit under stringent regulation, nowadays. In this paper, a practical digital control algorithm is presented to achieve the optimal response for dc-dc Buck converters without relying on the knowledge of the passive component value (inductance and capacitance). This algorithm introduces the curve fitting analysis for deriving the formulas to optimize the response under different transients from input voltage and load current. An opportunity is also provided for adaptive voltage positioning (AVP) technique under load transients without significant modifications on the original algorithm. Furthermore, an operational amplifier (OPAMP) based peak/valley voltage detector is introduced in place of using a fast or asynchronous ADC, upon which an improved performance and design simplicity can be expected on the entire digital control system. The estimation error of the proposed scheme is simulated and illustrated to provide a design guideline. Finally, simulation and experimental results are provided to validate the proposed schemes.
Keywords :
DC-DC power convertors; curve fitting; digital control; electric current control; transients; voltage control; AVP technique; DC-DC buck converter; adaptive voltage positioning technique; asynchronous ADC; curve fitting analysis; digital capacitor charge balance control; load transients; operational amplifier; voltage detector; Algorithm design and analysis; Capacitors; Detectors; Equations; Mathematical model; Transient analysis; Voltage control; AVP; Capacitor Charge Balance Controller; Dc-Dc Buck Converter; Digital Control; Extreme Voltage Detector; Fast transient performance; Optimal Control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2010 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-5286-6
Electronic_ISBN :
978-1-4244-5287-3
Type :
conf
DOI :
10.1109/ECCE.2010.5617979
Filename :
5617979
Link To Document :
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