Awesome Electronics Tutorials, Projects and How To´s
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GreatScott! · Published October 31, 2021
PCBA from $0 (Free Setup, Free Stencil)：https://jlcpcb.com/AAA Previous video: https://youtu.be/KE3CjZ0BUFo MOSFET Driver video: https://youtu.be/8swJ_Bnsgl4 Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Support me for more videos: https://www.patreon.com/GreatScott?ty=h More project information (schematic, gerber files,....) on Patreon: https://www.patreon.com/posts/57544108 Parts list (affiliate links): IR2184 MOSFET driver: https://s.click.aliexpress.com/e/_AnpUcr https://amzn.to/3jcxfj5 SS34 Diode: https://s.click.aliexpress.com/e/_Ac5TCb https://amzn.to/3AR0G0e 1206 Capacitors: https://s.click.aliexpress.com/e/_ACG8WT https://amzn.to/3DX6sPT 1206 Resistors: https://s.click.aliexpress.com/e/_AmrL3v https://amzn.to/2XlJX7m IRFB3077 MOSFET: https://s.click.aliexpress.com/e/_AL7HWB https://amzn.to/3FUuBbr 100uH Inductor: https://s.click.aliexpress.com/e/_Aq42ab https://amzn.to/3vAjOi5 470uF Capacitor: https://s.click.aliexpress.com/e/_AFCjAJ https://amzn.to/3aOQHhm PCB Terminal: https://s.click.aliexpress.com/e/_A8H315 https://amzn.to/3BVXPV8 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. Visit https://jlcpcb.com to get professional PCBs for low prices. 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
