Analysis of single input dual output buck converter with reduced cross regulation using decoupled sliding mode control strategy

摘要

In the present scenario, single input dual output (SIDO) converters are remarkably required for wide range of applications, as it is capable of handling two outputs with a single source. The general advantages of SIDO converters are reduced number of components in the topology; power rating can be increased or decreased depending on the application and it ease of control. However, it faces with a common problem of cross regulation occurring due to the change of load in anyone of the load terminals. This paper proposes a control technique for a SIDO buck converter (SIDO-BC) to have a mitigated cross regulation scenario during load change. Decoupled sliding mode controller (D-SMC) is developed for the SIDO-BC by considering the boundary limits of the inductor current. The D-SMC-based SIDO-BC provides better output regulation with mitigated cross regulation when compared to the conventional techniques. The topological small signal model derivation of the SIDO-BC is firmly derived, and the controller is designed and developed in such way to provide a stabilized regulated output. The entire system is implemented in simulation and in experimental hardware to validate the performance.