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High Current Buck Converter Circuit

January 03, 2022 by AFZAL REHMANI
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In This Tutorial, We are going to discuss

Introduction

Let's assume that you are working on a project that has fixed DC power supply voltage, but, your project or circuit needs the adjustable voltage supply that. What might you do then? To address this, circuit designers have worked and made two sorts of converters, the boot converter, and the buck converter. boot converter changes the lower voltage of fix supply into higher voltages of variable supply. And, the buck converter takes the higher fixed voltage and converts that into lower variable DC voltage. This tutorial is about the boost converter. Thus, the circuit uses some easily available components and the buck regulator IC.

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Hardware Required

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Circuit Diagram

buck-converter-circuit-lm2576.jpg

Working Explanation

This 10V DC-DC Buck Converter Circuit uses the LM2576 IC (HV version) having 4pins. Pin 1 is for the supply voltage while pin 3 is for ground. Pin 5 is for switching mode which is also grounded in our case. Further, Pin 4 is the feedback pin that is connected to the 50K potentiometer, through which you can adjust the voltage. After these connections, when you give the fixed supply of 60V, you will get the variable supply from 1.2V to 60V (approx). 

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