Title :
Open-loop peak voltage feedforward control of PWM buck converter
Author :
Kazimierczuk, Marian K. ; Edström, Anders J.
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
fDate :
5/1/2000 12:00:00 AM
Abstract :
DC and small-signal analyses are given for an open-loop buck pulse-width modulated (PWM) DC-DC converter with peak-voltage-modulation (PVM) feedforward control. A DC model is used to derive the DC input-to-output voltage transfer function taking into account parasitic components, such as the MOSFET on-resistance, diode forward resistance, and diode offset voltage. A small-signal model is used to derive the audio susceptibility and the input impedance. It is shown that ideally the audio susceptibility is zero and the input impedance is frequency independent and negative for the buck converter with PVM feedforward control
Keywords :
DC-DC power convertors; PWM power convertors; electric impedance; equivalent circuits; feedforward; network analysis; transfer functions; DC analysis; DC input-to-output voltage transfer function; DC model; MOSFET on-resistance; PWM buck converter; audio susceptibility; diode forward resistance; diode offset voltage; input impedance; open-loop peak voltage feedforward control; parasitic components; peak-voltage-modulation; pulse-width modulated DC-DC converter; small-signal analysis; Buck converters; DC-DC power converters; Diodes; Impedance; MOSFET circuits; Open loop systems; Pulse width modulation; Pulse width modulation converters; Transfer functions; Voltage control;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
