Title :
A new PWM/PFM control technique for improving efficiency over wide load range
Author :
Chen, Chi-Lin ; Hsieh, Wei-Lun ; Lai, Wei-Jen ; Chen, Ke-Horng ; Wang, Ching-Sung
Author_Institution :
Dept. of Electr. & Control Eng., Nat. Chiao Tung Univ., Hsinchu
fDate :
Aug. 31 2008-Sept. 3 2008
Abstract :
This paper proposed a novel controlling technique of pulse width modulation (PWM) mode and pulse frequency modulation (PFM) mode to keep the high efficiency within width range of loading. The novel control method is using PWM and PFM detector to achieve two modes switching appropriately. The controlling technique can make the efficiency of current mode DC-DC buck converter up to 88% at light loading and this paper is implemented by TSMC 0.35 mum CMOS process.
Keywords :
DC-DC power convertors; current-mode circuits; pulse frequency modulation; pulse width modulation; CMOS; PWM/PFM control; current mode DC-DC buck converter; pulse frequency modulation mode; pulse width modulation mode; size 0.35 micron; Buck converters; DC-DC power converters; Energy consumption; Inductors; Latches; Power generation; Pulse width modulation; Pulse width modulation converters; Strontium; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on
Conference_Location :
St. Julien´s
Print_ISBN :
978-1-4244-2181-7
Electronic_ISBN :
978-1-4244-2182-4
DOI :
10.1109/ICECS.2008.4675015
