Title :
Dynamic hysteresis band control of the buck converter with fast transient response
Author :
Leung, Kelvin Ka-Sing ; Chung, Henry Shu-Hung
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
fDate :
7/1/2005 12:00:00 AM
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 50 W buck converter.
Keywords :
DC-DC power convertors; circuit stability; hysteresis; switching convertors; transient response; 50 W; DC-DC power conversion; boundary control; buck converter; dynamic hysteresis band control; fast transient response; high slew-rate response; large-signal stability; state trajectory prediction; Buck converters; Capacitors; Hysteresis; Inductors; Kelvin; Paramagnetic resonance; Steady-state; Switches; Transient response; Voltage control; Boundary control; DC–DC power conversion; large-signal stability; state trajectory prediction;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2005.850411
