On energy processing with linear–assisted DC/DC converters
Document typeConference lecture
Rights accessOpen Access
Abstract—Linear-assisted DC/DC converters (or linears-witching hybrid DC/DC converters) consist of a voltage linear regulator (classic NPN or nMOS topologies and LDO) connected in parallel with a switching DC/DC converter. In order to control these hybrid structures, different strategies exist, allowing to fix the switching frequency as a function of some parameters of the linear regulator. This article compares two control strategies that, although can be applied to the same circuital structure of linear-assisted converter, are sensibly different. The first one, reported in previous literature, cancels completely the average current through the linear regulator in steady state to achieve a reduction of the losses. Thus the efficiency of the whole system increases and almost equals the one of the standalone switching converter. The proposed approach, in spite of a slightly increment of linear regulator’s losses, reduces the output ripple due to the crossover distortion of linear regulator output stage.
CitationMartinez, H. On energy processing with linear–assisted DC/DC converters. A: International Conference on Environment and Electrical Engineering. "2015 IEEE 15th International Conference on Environment and Electrical Engineering. Conference Proceedings". Roma: 2015, p. 1-6.