Title :
Use of state trajectory prediction in hysteresis control for achieving fast transient response of the buck converter
Author :
Leung, Kelvin K S ; Chung, Henry S H ; Hui, S.Y.R.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
A dynamic hysteresis control of the buck converter for achieving high slew-rate response to disturbances is proposed. The hysteresis band is derived from the output capacitor current that predicts the output voltage magnitude after a hypothesized switching action. Four switching criteria are formulated to dictate the state of the main switch. The output voltage can revert to the steady state in two switching actions after a large-signal disturbance. The technique is verified with the experimental results of a 50W buck converter.
Keywords :
DC-DC power convertors; hysteresis; switching convertors; transient response; 50 W; buck converter; dynamic hysteresis control; large-signal disturbance; slew rate; state trajectory prediction; switching criteria; transient response; Buck converters; Circuits; Hysteresis; Inductors; Regulators; Steady-state; Switches; Trajectory; Transient response; Voltage;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205050
