Title :
A Dynamic Voltage Scaling Controller for Maximum Energy Saving Across Full Range of Load Conditions
Author :
Wei, Guowen ; Trescases, Olivier ; Ng, Wai Tung
Author_Institution :
Laboratory for Low-Power Management and Integrated SMPS, The Edward S.Rogers Sr.Dept. of Electrical and Computer Engineering, University of Toronto,10, King´´s College Road, Toronto, ON, Canada, M5S 3G4. weig@vrg.utoronto.ca
Abstract :
For devices operating mainly in the standby or low power mode, energy saving from dynamic voltage scaling (DVS) is limited due to very poor efficiency of the PWM DC/DC converter operating at light load conditions, resulting in shorter than expected battery life. This paper first presents the design of a DVS controller - realized on a Xilinx CoolRunner 2 CPLD - having a 25μs worst case transient response and 15 mV average Vddstep size across an 1.30-1.90 V range. Next a scheme is proposed in which the DVS controller automatically selects between the PFM and PWM mode DC/DC conversion to realize maximum power saving across full range of load conditions.
Keywords :
Automatic control; Batteries; DC-DC power converters; Dynamic voltage scaling; Pulse width modulation; Pulse width modulation converters; Size control; Temperature control; Transient response; Voltage control;
Conference_Titel :
Electron Devices and Solid-State Circuits, 2005 IEEE Conference on
Print_ISBN :
0-7803-9339-2
DOI :
10.1109/EDSSC.2005.1635284
