Control Scheme for Reduced Cross-Regulation in Single-Inductor Multiple-Output DC-DC Converters

Abstract

Cost and size is very important factor for any electronics and electrical device. As the size reduces, use of power will also reduce. In today’s era every portable devices demand long-term power backup and efficient battery along with almost constant DC voltage. Single inductor multiple output (SIMO) DC-DC converter can easily fulfill this requirement and generate various voltage level just by using single inductor. Number of power electronic switches and associate loss can be reduced by using SIMO convertor. However, SIMO topology also suffer cross regulation between their outputs. This can affect the stability and performance of the system during load transient. In addition, if all the switches are OFF, no path will be left for inductor to discharge. If timing of turning ON/OFF of switches is not chosen well, it can be resulted in short circuit. To avoid this problems good controller and accurate model of SIMO converter is must. This literature is about modeling and designing controller for SIMO dc-dc converter. Compensator and PID controller used to reduce cross regulation. However, it can also help us for SIMO topology like boost-boost converter. For simulation, MATLAB/Simulink is used to show cross regulation effect and voltages at output