Learn the design of buck-boost converters with feedback that allow for adjustable and stable power supplies. 







A switch-mode DC-DC converter known as a buck-boost converter produces an output voltage that is either larger than or less than the input voltage. A buck-boost converter circuit is arranged similarly to a buck converter and a boost converter circuit; in fact,it combines the features of both of these circuits.



I covered the creation of an Arduino-based buck and boost converter circuit in a previous article. This article demonstrates how to use feedback in power supply design when you require a flexible and reliable power source.



The buck-boost converter has two distinct topologies:



<ol><li>Inverting buck-boost converter</li><li>Non-inverting topology</li></ol>



In this article tutorial,we'll examine the buck-boost converter's inverting and non-inverting topologies and create an Arduino-based buck-boost converter with feedback.



<h2>Inverting Topology</h2>



The output voltage in an inverting topology is the input voltage's polarity reversed.



<figure class="wp-block-image size-full is-style-default"><img src="https://eduengteam.com/wp-content/uploads/2022/09/image-7.png" alt="" class="wp-image-5111"/></figure>



Similar in arrangement,it likewise functions so that the output voltage can be changed depending on the switch's duty cycle.



Here,the input voltage linked to the inductor charges it and provides power to the load when the switch is in the ON position.



In the OFF state,the circuit's two energy storage components are supplying energy to the load through the inductor,which is directly linked to the load. As a result,our DC component is inverted and directly proportional to the switching duty cycle.



Because there is no connection to ground,this circuit has a small amount of complexity. However,if you're working with,there is no use in taking this constraint into consideration.



<h2>Non-inverting Topology</h2>



Here,the output voltage is not inverted but can be adjusted in every way,meaning it can be decreased or increased. This is the generalized topology that is very widely used and will be used by us for a very interesting circuit ahead. Here,the arrangement is the combination of the buck converter and boost converter circuits.







<figure class="wp-block-image size-full is-style-default"><img src="https://eduengteam.com/wp-content/uploads/2022/09/image-8.png" alt="" class="wp-image-5112"/></figure>



When S1 is closed and S2 is switched,the circuit operates as a boost converter. When S2 is open keeping S1 oscillating,we get a buck converter circuit. Thus,we can increase or decrease our output voltage according to our requirements.



There is another version of a buck-boost converter known as a flyback converter. Here,the inductor is split to form a transformer. So,voltage ratios of primary and secondary windings of the transformer are multiplied,but there is one more advantage of this circuit: isolation (more technically,galvanic isolation). So a flyback converter adjusts the output voltage providing an additional feature of isolation. This circuit is used in very common low power supplies like phone chargers.



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Making a Buck-boost Converter Based on Arduino and Receiving Feedback

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Making a Buck-boost Converter Based on Arduino and Receiving Feedback

Making a Buck-boost Converter Based on Arduino and Receiving Feedback

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