DocumentCode :
1762048
Title :
Prediction of Subharmonic Oscillation in 
Controlled Buck Converters in CCM
Author :
Chung-Chieh Fang
Author_Institution :
Sunplus Technol., Hsinchu, Taiwan
Volume :
30
Issue :
7
fYear :
2015
fDate :
42186
Firstpage :
4035
Lastpage :
4036
Abstract :
A recent paper proposed I2 average-current control with constant switching period (CSP) or constant on-time (COT) operation in continuous conduction mcontinuous conduction modeode (CCM). The small-signal analysis was presented, but only for the COT case. No instability or its condition was reported. In this note, unified subharmonic oscillation conditions are derived for both CSP and COT buck converters. The effects of feedback gain, turn-off delay, and stabilizing ramp slope are considered. The results can be extended to other converters or control schemes.
Keywords :
electric current control; harmonic oscillators; power convertors; stability; CCM; COT buck converters; CSP; I2 average-current control; I2 controlled buck converters; buck converters; constant on-time operation; constant switching period; feedback gain; stabilizing ramp slope; subharmonic oscillation prediction; turn-off delay; Delays; Electronic mail; Generators; Oscillators; Stability analysis; Switches; Critical condition; critical condition; instability; subharmonic oscillation;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2014.2361636
Filename :
6917037
Link To Document :
