35V-5A Adjustable Switching Power Supply (DC to DC Buck Converter)

35V-5A Adjustable Switching Power Supply (DC to DC Buck Converter)
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Altium Designer + License (Free): www.altium.com...
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Altium 365: www.altium.com...
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OctoPart: octopart.com
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Article: www.pcbway.com...
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Gerber/PCB: www.pcbway.com...
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Other Videos: bit.ly/2N9OlPa
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A DC-to-DC converter is one of the most commonly used circuits in electronics, especially in power supply applications. There are three major types of DC-to-DC converters (non-isolated): Buck, Boost, and Buck-Boost. Sometimes a buck converter is also called a step-down converter and a boost converter is also called a step-up converter.
In this article/video, I introduce an adjustable 5A DC-to-DC converter circuit that uses an advanced chip, made by Texas Instruments, which is TPS5450. It’s a high-frequency and efficient buck converter chip. I have followed several PCB design rules to ensure low noise, low EMI, and high stability of the output voltage.
To design the schematic and PCB, I used Altium Designer 23. The fast component search engine (Octopart) allowed me to quickly consider components’ information and also generate the BOM. To get high-quality fabricated boards, I sent the Gerber files to PCBWay and tested the circuit for output stability and noise, using a DC load, A multimeter, and an oscilloscope. Soon later, I will also perform the step-response test and demonstrate the results.

[@MyVanitar]

35V-5A Adjustable Switching Power Supply (DC to DC Buck Converter)

[@hp2073]

Thanks for sharing this project and PCB design rules 🙂

[@MyVanitar]

Thanks

[@redmist4963]

I'd say the power output should be quite low for the chip and the cooling it has. Like 15w max? Also the diode is quite small for 5 amps unless it is a shotky diode.

[@MyVanitar]

The diode "must" be Schottky type and yes it is 5A. Check back again tomorrow or the day after since I'll put the link to the article in the video description. sometimes delay happens. I don't remember the exact figure for the chip, check the datasheet. it depends on the application.

[@sinmim1]

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