Interleaving Technique for Improving Conventional Buck Converter Performance

Conventional buck converter (CBC) topology has been widely used as power electronics devices to step-down dc voltage. A significant output ripple and low efficiency become problems faced by CBC. Optimizing CBC can use an interleaving technique resulting in interleaved buck converter (IBC) topology dedicated to overcoming output ripple. Unfortunately, the comprehensive study comparing conventional buck and interleaved topology still have not acquired special attention. This paper compares both topologies to explain how the interleaving technique can improve conventional circuit performance. Simulations were carried out in PSIM software by considering parasitic elements to obtain results close to the general hardware implementation. From the results, the capacitance of the output filter and inductor current ripple using IBC configuration can decrease. Also, the dynamic response of IBC is faster than CBC to achieve steady-state conditions in various inductor current ripple designs. By applying the interleaving technique in CBC, the average efficiency can be increased around 0.43% of the 250 W power rating device. It was proven that the interleaving technique improves the performance of conventional topology.