(MIMO Buck Converter) Multi-Input Multi-Output DC-DC Buck Converter

Abstract

Designs of the power electronics circuitry are nowadays reducing the size, space, and weight of converter and inverter circuits. This is possible because of the availability of new high-switching frequency devices. This paper presents a generalized model of buck converters that is multi-input multi-output(MIMO) fixed and variable. The converter used for stepping down the voltage is called a buck converter. The buck converter is designed, analyzed simulated & developed. The proposed model of this Buck converter consists of two parts: (a) Main converter circuits with the components like switch, inductor, diode, capacitor, and load, (b) A control circuit for controlling the operation of the switch using 10 10-turn potentiometer. This model can accurately give the power output voltage.

Introduction

I. INTRODUCTION

The objective of this design is to design a programmable DC-DC buck converter for embedded users and for industrial purposes. This is the first version of a programmable DC-DC step-down converter (Buck converter) in this board there are two inputs which is used to provide input power supply to the board one is a Micro USB socket and another is a two pin male header and in the output side there are four two pin headers out of which three headers having fixed supply 1.5V, 3.3V and 5V and one is variable 1.23V to 37V.

Input voltage can be 3V to 40V

III. INDENTATIONS AND EQUATIONS

In this project I used LM2576 voltage regulator IC to get the adjustable output voltage, this is an industrial use voltage regulator IC which is widely used. The range of the output voltage vary from 1.23v to 37v with 4% tolerance. It is a monolithic integrated circuits ideally suited for easy and convenient design of a step-down switching regulator or buck converter. This ICs are available in fixed and variable output version. These regulator ICs is designed to reduce the number of components and minimize the size of buck converter and simplify the design.

IV. BASICS OF BUCK CONVERTER

The LM2576 is a “Buck” or Step−Down Converter which is the most elementary forward−mode converter. Its basic schematic can be seen in Figure 16. The operation of this regulator topology has two distinct time periods. The first one occurs when the series switch is on, the input voltage is connected to the input of the inductor. The output of the inductor is the output voltage, and the rectifier (or catch diode) is reverse biased. During this period, since there is a constant voltage source connected across the inductor, the inductor current begins to linearly ramp upwards, as described by the following equation.

References

[1] International Journal of Power Electronics and Drive Systems (IJPEDS) ISSN: 2088-8694 https://www.researchgate.net/publication/290460732_Development_of_Digital_Controller_for_DC-DC_Buck_Converter [2] On Semiconductor datasheet https://www.skytech.ir/DownLoad/File/924_LM2576T-ADJ%20DIP.PDF http://onsemi.com

Copyright

Copyright © 2024 Vipin Verma, Aruna Patel. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.