DocumentCode :
3621784
Title :
All-digital DPWM/DPFM controller for low-power DC-DC converters
Author :
Kun Wang;N. Rahman;Z. Lukic;A. Prodic
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fYear :
2006
fDate :
6/28/1905 12:00:00 AM
Abstract :
A digital controller for dc-dc switching converters used in battery-powered handheld devices is introduced. The controller can operate in two modes and encompasses designs of a digital pulse-width modulator (DPWM) and an all-digital pulse-frequency modulator (DPFM). The DPWM has a high resolution and can operate at very-high constant switching frequency (tens of MHz). The DPFM features very-low power consumption, programmable on-time and control over switching frequency range. An experimental FPGA prototype and an application-specific IC that employ controller architecture are built around 3.3 V, 3W, 6 MHz buck power stage and successful operation of the digital controller in both modes is verified. The low power consumption has been also verified on a chip implemented in a standard CMOS 0.18/spl mu/m process.
Keywords :
"DC-DC power converters","Pulse modulation","Digital control","Digital modulation","Switching frequency","Energy consumption","Switching converters","Handheld computers","Space vector pulse width modulation","Field programmable gate arrays"
Publisher :
ieee
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2006. APEC ´06. Twenty-First Annual IEEE
Print_ISBN :
0-7803-9547-6
Type :
conf
DOI :
10.1109/APEC.2006.1620618
Filename :
1620618
Link To Document :
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