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Small-Signal Transfer-Function Expressions of N-Connected Boost-Derived Dc-Dc Converters
M. R. D. Al-Mothafar

This paper presents analytical expressions that describe the small-signal behaviour of n-connected current-programmed parallel-input/series-output pulse-width modulated boost-derived dc-dc converters operating in the continuous- current conduction mode. State-space averaging is used to represent the power stage while current-mode control is modelled using a modified new continuous-time technique. The derived expressions include the number of modules as a variable and are valid up to half the switching frequency. The virtual network analyzer approach is used to validate the analysis.

Keywords: Power electronics, Switching power supplies, Small-signal analysis, Modular dc-dc converters, Current-mode control, Modelling and Simulation.

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