Title :
Comparison of Wide- and High-Frequency Duty-Ratio-to-Inductor-Current Transfer Functions of DC–DC PWM Buck Converter in CCM
Author :
Kondrath, Nisha ; Kazimierczuk, Marian K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Minnesota Duluth, Duluth, MN, USA
Abstract :
Wide- (WF) and high-frequency (HF) small-signal models are presented for pulsewidth-modulated dc-dc buck converter power stage. An exact duty-ratio-to-inductor-current transfer function is derived using the WF model and compared to an approximate transfer function derived using the HF model for the buck converter power stage in continuous conduction mode. The theoretical results are validated using experimental results.
Keywords :
DC-DC power convertors; PWM power convertors; transfer functions; DC-DC PWM buck converter; approximate transfer function; continuous conduction mode; duty-ratio-to-inductor-current transfer functions; high-frequency small-signal models; pulsewidth-modulated dc-dc buck converter power stage; wide-frequency small-signal models; Converters; Current measurement; Delay; Inductors; MOSFET circuits; Pulse width modulation; Transfer functions; Current-mode control; dc–dc converters; power-stage transfer function;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2011.2134053
