Abstract
For applications that requires a step-down converters with lower conversion ratios, Hybrid Buck L DC/DC converter is suitable. Compared with the traditional Buck converter, the disadvantage of this converter is the great complexity of filter elements. Normal, these filter effort can be reduced by multiphase configuration and interleaved switching. In case of this circuit, an inductor is connected in the negative line. This means, by use of multiphase circuits, current can be divide into several negative lines, and it leads to an undefined converter operation. For this reason, additional elements are necessary for symmetrize the phase currents. The filter savings in case of a two-phase design and the necessary additional effort for balancing the phase currents are analyzed and presented.