An integrative modeling method and stability analysis of higher order switching converters

Aiming at strong nonlinearity and complexity of higher order switching converters, an integrative modeling method was proposed by integrating the state-space average modeling approach with the discrete-time modeling approach, based on which, stability analysis of current-mode controlled higher order switching converters was carried out, and the relation between the stability and the circuit parameters was studied. The results of simulation verify the validity of the modeling method and stability analysis, and show the dynamical behaviors by means of bifurcation diagram, Lyapunov exponent, phase portrait, FFT spectrum.