Title :
Voltage-mode controlled switching converter with dual-edge constant off-time modulation
Author :
Xing Chen ; Yiming Chen ; Guohua Zhou ; Ping Yang
Author_Institution :
Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu, China
Abstract :
In order to improve the output-regulation accuracy of the switching converter with conventional constant off-time (CCFT) modulation, dual-edge constant off-time (DCFT) modulation for switching converter is proposed in this paper. The principle of switching converter with DCFT modulation, including leading-triangle constant off-time (LT-CFT) modulation and trailing-triangle constant off-time (TT-CFT) modulation, is introduced, and its steady-state and transient-state performance are analyzed and compared with CCFT modulation. The results show that DCFT modulation improves output-regulation accuracy and transient performance of switching converter. Finally, simulation results validate the correctness of the theoretical analysis.
Keywords :
modulation; switching convertors; CCFT modulation; DCFT modulation; LT-CFT modulation; TT-CFT modulation; conventional constant off-time; dual-edge constant off-time; dual-edge constant off-time modulation; leading-triangle constant off-time; output-regulation accuracy; steady-state performance; trailing-triangle constant off-time; transient-state performance; voltage-mode controlled switching converter; Accuracy; Modulation; Switches; Switching converters; Transient analysis; Voltage control; Buck converter; constant off-time; dual-edge constant off-time; leading-triangle modulation; trailing-triangle modulation;
Conference_Titel :
Electronics and Application Conference and Exposition (PEAC), 2014 International
Conference_Location :
Shanghai
DOI :
10.1109/PEAC.2014.7037859
