2021-10-31

[public] 429K views, 19.6K likes, dislikes audio only

GreatScott!

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In this video I will be showing you how I created a synchronous buck converter. Such a synchronous design comes with one big advantage and that is a better efficiency. Datasheets claim an efficiency of 95% and above which I wanted to confirm by myself. That is why I will not only show you how a normal buck converter functions, but also how to transform it into a synchronous buck converter. Let's get started!

Useful websites which were shown/mentioned in the video:

https://www.we-online.com/web/en/index.php/show/media/07_electronic_components/news_1/blog/midcom_blog_photos/SMPSChart.pdf

https://www.ti.com/seclit/ug/slyu036/slyu036.pdf

https://www.maximintegrated.com/en/design/technical-documents/app-notes/6/6129.html

https://techweb.rohm.com/knowledge/acdc/acdc_pwm/acdc_pwm04/3551

https://www.monolithicpower.com/en/the-difference-between-ccm-and-dcm-explained

https://www.ieee.li/pdf/viewgraphs/topology_review_dc_dc_converters.pdf

https://www.ti.com/lit/ds/symlink/lmq61460-q1.pdf?ts=1634034318661&ref_url=https%253A%252F%252Fwww.ti.com%252Fpower-management%252Fnon-isolated-dc-dc-switching-regulators%252Fstep-down-buck%252Fbuck-converter-integrated-switch%252Foverview.html%253Fgclid%253DEAIaIQobChMIv4Xm99PE8wIVAeztCh3vQAOeEAAYASAAEgIDtfD_BwE%2526gclsrc%253Daw.ds

https://www.ti.com/lit/an/snva038b/snva038b.pdf

https://fscdn.rohm.com/en/products/databook/datasheet/ic/power/switching_regulator/bd93291efj-e.pdf

https://www.ti.com/lit/ds/symlink/lm61495.pdf?ts=1634225117018&ref_url=https%253A%252F%252Fwww.ti.com%252Fpower-management%252Fnon-isolated-dc-dc-switching-regulators%252Fstep-down-buck%252Fbuck-converter-integrated-switch%252Foverview.html

Thanks to JLCPCB for sponsoring this video.

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Music:

2011 Lookalike by Bartlebeats

0:00 Why a "Synchronous" Voltage Converter?

1:15 Intro

1:54 Buck Converter Theory

4:09 DIY Buck Converter

5:25 Improving The Buck Converter (Synchronous Design Theory)

6:59 DIY Synchronous Buck Converter

8:16 DCM Problem with the Synchronous Design

9:40 Power/Efficiency Tests