DocumentCode :
3622597
Title :
Multimode digital SMPS controller IC for low-power management
Author :
N. Rahman;A. Parayandeh; Kun Wang;A. Prodic
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fYear :
2006
fDate :
6/28/1905 12:00:00 AM
Abstract :
This paper introduces a novel low-power digital controller for high frequency dc-dc switch-mode power supplies (SMPS) that is well-suited for integration in power management systems of small handheld devices. The controller operates at programmable constant switching frequencies up to 20 MHz and can change mode of operation to improve the overall SMPS efficiency. The key elements of the controller are a high frequency digital pulse-width modulator (DPWM), based on a segmented ring oscillator, and a signal-race based digital pulse-frequency modulator (DPFM). The controller is implemented in a standard CMOS 0.18 mum process and its operation verified both through simulations and experiments
Keywords :
"Switched-mode power supply","Digital control","Digital integrated circuits","Pulse modulation","Power system management","Frequency","Digital modulation","Control systems","Energy management","Handheld computers"
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Print_ISBN :
0-7803-9389-9
Type :
conf
DOI :
10.1109/ISCAS.2006.1693836
Filename :
1693836
Link To Document :
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