DocumentCode :
1195470
Title :
Open-loop power-stage transfer functions relevant to current-mode control of boost PWM converter operating in CCM
Author :
Bryant, Brad ; Kazimierczuk, Marian K.
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
Volume :
52
Issue :
10
fYear :
2005
Firstpage :
2158
Lastpage :
2164
Abstract :
This paper presents the analysis of open-loop power-stage dynamics relevant to current-mode control for a boost pulsewidth-modulated (PWM) dc-dc converter operating in continuous-conduction mode (CCM). The transfer functions from input voltage to inductor current, from duty cycle to inductor current, and from output current to inductor current are derived. The delay from the MOSFET gate drive to the duty cycle is modeled using a first-order Pade´ approximation. The derivations are performed using an averaged linear small-signal circuit model of the boost converter for CCM. The transfer functions can be used in modeling the complete boost PWM converter when current-mode control is used. The theory was in excellent agreement with the experimental results, enforcing the validity of the transfer functions derived.
Keywords :
DC-DC power convertors; current-mode circuits; electric current control; open loop systems; switched mode power supplies; transfer functions; MOSFET; Pade approximation; boost PWM converter; continuous-conduction mode; current-mode control; dc-dc converter; delay; duty cycle; open-loop power-stage dynamics; small-signal circuit model; switch-mode power supply; transfer functions; Circuits; Delay; Diodes; Inductors; Open loop systems; Pulse width modulation; Pulse width modulation converters; Switches; Transfer functions; Voltage; Boost converter; continuous-conduction mode (CCM); current-mode control; delay; pulsewidth-modulated (PWM) power converters; small-signal transfer functions; switch-mode power supply;
fLanguage :
English
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-8328
Type :
jour
DOI :
10.1109/TCSI.2005.852919
Filename :
1519629
Link To Document :
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