Title :
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
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;
Conference_Titel :
Computers in Power Electronics, 2000. COMPEL 2000. The 7th Workshop on
Conference_Location :
Blacksburg, VA
Print_ISBN :
0-7803-6561-5
DOI :
10.1109/CIPE.2000.904703
