A New Isolated Multi-Output Converter with Concurrent Buck، Boost and Inverted Outputs

This paper، present a new isolated multi-output converter with simultaneous buck، boost and inverted outputs. Using the single inductor multi-outputs applications and combining it with flyback structures، the proposed converter can produce different isolated output voltages. In present study، the mathematical relations between output voltages and input have been calculated. The proposed converter has been modeled based on signal flow graph approach. Derivations of large-signal, small-signal and steady state models are demonstrated by considering a single inductor four outputs buck/boost and invertd convert. In this paper, a multi output converter in continuous conduction mode (CCM) are modelled based on SFG method. A prototype has been made which generates two isolated boost voltage، ±15V، two isolated buck voltage، ±5V، from single 12V input supply. Simulation and experimental results are presented to proof the concept of the proposed converter and its model in steady-sated، small signal and large-signal behavior. The simplicity and systematic procedure presented in this work show that the SFG can be a good alternative for modeling switching converter with .complicated structures