Digital PWM controller and current estimator for a low-power switching converter

Author

Prodic, Aleksandar ; Maksimovic, Dragan

Author_Institution

Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA

fYear

2000

fDate

2000

Firstpage

123

Lastpage

128

Abstract

This paper describes design and implementation of a digital controller for an experimental low-power converter in a battery-powered system with power management. Multiple operating modes are used to maintain high efficiency over wide ranges of input voltages and loads. A current estimation technique to perform load-dependent mode switching is proposed and tested. A digital PID regulator design example is described, with emphasis on practical limitations imposed by the fixed-point arithmetic and the delay due to sampling and processing

Keywords

PWM power convertors; control system synthesis; digital control; electric current control; parameter estimation; switching circuits; three-term control; current estimation technique; current estimator; digital PID regulator design; digital PWM controller; digital controller; fixed-point arithmetic; high efficiency; input voltages; load-dependent mode switching; loads; low-power converter; low-power switching converter; multiple operating modes; power management; Battery management systems; Control systems; Digital control; Energy management; Performance evaluation; Power system management; Pulse width modulation; Regulators; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Power Electronics, 2000. COMPEL 2000. The 7th Workshop on

Conference_Location

Blacksburg, VA

Print_ISBN

0-7803-6561-5

Type

conf

DOI

10.1109/CIPE.2000.904703

Filename

904703