Title :
A novel constant on-time bi-frequency control technique for switching dc-dc converters
Author :
Wang, Jinping ; Xu, Jianping ; Zhang, Fei ; Qin, Ming
Author_Institution :
Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu, China
Abstract :
A novel constant on-time bi-frequency (COT-BF) control technique for switching dc-dc converters operating in discontinuous conduction mode (DCM) is proposed in this paper. The proposed COT-BF control technique realizes the output voltage regulation of switching dc-dc converters by adjusting the combination of high-frequency control pulse and low-frequency control pulse. COT-BF control technique is simple to implement, features with fast transient response. Buck converter operating in DCM is taken as an example to illustrate the application of COT-BF control technique. A prototype of COT-BF controlled buck converter is implemented and experimental results verify the theoretical analysis results.
Keywords :
DC-DC power convertors; frequency control; voltage control; buck converter; constant on-time bi-frequency control technique; discontinuous conduction mode; high-frequency control pulse; low-frequency control pulse; output voltage regulation; switching DC-DC converters; Buck converters; Circuits; DC-DC power converters; Electromagnetic interference; Pulse amplifiers; Pulse width modulation; Sliding mode control; Switching converters; Transient response; Voltage control; bi-frequency control; constant on-time control; discontinuous conduction mode (DCM); switching dc-dc converter;
Conference_Titel :
Industrial Electronics and Applications (ICIEA), 2010 the 5th IEEE Conference on
Conference_Location :
Taichung
Print_ISBN :
978-1-4244-5045-9
Electronic_ISBN :
978-1-4244-5046-6
DOI :
10.1109/ICIEA.2010.5515826
