Inherent DCM operation of the asymmetrical interleaved dual buck-boost

A fifth order DC/DC converter based on the asymmetric connection of two buck-boost cells with complementary activation of their switches is presented. In steady state, the new converter inherently operates in discontinuous conduction mode (DCM). With a duty cycle greater than 38%, the asymmetrical interleaved dual buck-boost (AIDBB) behaves like an inverting boost converter. The AIDBB exhibits some benefits of interleaving cells without the need for specific control strategies to distribute the input current between the buck-boost cells. Mainly, the converter input current and output voltage ripples are significantly smaller than their average values. Due to the DCM operation, the system presents three operation intervals whose duration is independent of the converter parameters.