A small-signal circuit model for PWM dc-dc converters operated in discontinuous conduction mode DCM is pre- sented. The model is composed of controlled current sources, and resistances. The principle of energy conserva- tion approach is utilized to take into account parasitic re- sistances of the transistor and diode and the diode thresh- old voltage. The proposed model is suitable for small-signal, frequency-domain representation of the con- verters. This model is used to derive the expressions for a buck-boost converter control-to-output transfer function, input-to-output voltage transfer function, input impedance, and the output impedance. Bode plots are also given for these transfer functions.
Computer aided small-signal analysis for PWM DC-DC converters operated in discontinuous conduction mode / A. Reatti; M. Balzani. - STAMPA. - (2005), pp. 1561-1564. (Intervento presentato al convegno IEEE MWSCAS 2005 tenutosi a Cincinnati (OH) nel 7-10 Agosto 2005) [10.1109/MWSCAS.2005.1594413].
Computer aided small-signal analysis for PWM DC-DC converters operated in discontinuous conduction mode
REATTI, ALBERTO;
2005
Abstract
A small-signal circuit model for PWM dc-dc converters operated in discontinuous conduction mode DCM is pre- sented. The model is composed of controlled current sources, and resistances. The principle of energy conserva- tion approach is utilized to take into account parasitic re- sistances of the transistor and diode and the diode thresh- old voltage. The proposed model is suitable for small-signal, frequency-domain representation of the con- verters. This model is used to derive the expressions for a buck-boost converter control-to-output transfer function, input-to-output voltage transfer function, input impedance, and the output impedance. Bode plots are also given for these transfer functions.File | Dimensione | Formato | |
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B39_PWM switch model of a buck-boost converter operated under discontinuous conduction mode.pdf
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