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amchaddad
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re: Understand and reduce DC/DC switching-converter ground noise
amchaddad   11/23/2015 11:45:37 AM
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As an on-PCB DC/DC converter, I can see that as the designer, I am responsable for the best practice in the supporting circuitry and layout design to minimize the coruption of Ground. I would like to understand better (1) how to determine if one converter or another may be designed better or worse for this particular trait and (2), when using a switching Mains supply to provide my DC power, what steps can I take to minimize the ground noise between the outoput of the power-supply and my device's circuits?

silker
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re: Understand and reduce DC/DC switching-converter ground noise
silker   4/27/2013 9:28:30 PM
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Can we say that RC inductor current sense method has the drawback of ground line pollution? We intentionally put a capacitor (along a resitor resistor) between inductor legs.

SLN MURTHY
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re: Understand and reduce DC/DC switching-converter ground noise
SLN MURTHY   5/15/2012 5:43:39 AM
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It is an excellent article. Jerry Deng's point is valid and impact of varying current in a constant voltage environment would add more punch to this basic understanding.

Swamp
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re: Understand and reduce DC/DC switching-converter ground noise
Swamp   12/1/2011 1:53:00 PM
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As a slight improvement, it might have been informative to include the specific physical location of the input capacitor described in your article (between the Vin pin of the converter IC/switch transistor and the anode of the switching diode). Great article, Jeff -thanks!

Jerry.Deng
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re: Understand and reduce DC/DC switching-converter ground noise
Jerry.Deng   11/29/2011 7:31:54 PM
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good article. However it assumes constant current on load, most IC actually works at constant voltage with varing current dynamically, any idea?

PierreBTOL
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re: Understand and reduce DC/DC switching-converter ground noise
PierreBTOL   11/26/2011 8:14:59 AM
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@ studleylee: Very useful, thank you for that link !

huanben
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re: Understand and reduce DC/DC switching-converter ground noise
huanben   11/25/2011 6:12:40 AM
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GOOOOOOOOOOOOOOOOOD

BicycleBill
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re: Understand and reduce DC/DC switching-converter ground noise
BicycleBill   11/24/2011 12:48:06 PM
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There is some system bug which is preventing the "enlarge" of Figures 5 and 6 from appearing properly. Here are the direct links for those figures: http://www.eetimes.com/ContentEETimes/Documents/Schweber/C0893/C0893-Figure5.pdf AND http://www.eetimes.com/ContentEETimes/Documents/Schweber/C0893/C0893-Figure6.pdf

Sail Mike
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re: Understand and reduce DC/DC switching-converter ground noise
Sail Mike   11/24/2011 8:58:03 AM
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Missing links for larger images & cant print

Fabio007
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re: Understand and reduce DC/DC switching-converter ground noise
Fabio007   11/24/2011 8:27:13 AM
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Great article, I would like to get a PDF copy of it, but the print link does not seem to work. To add to comment of agk re: winding inductor with low parasitic C, another trick is to have the turns at the ends of the winding (near the connection terminals) spaced further apart compared to turns in the middle of the winding. This is an old trick used by ham-radio builders, and can result is a smaller inductor than would result from spacing all turns the same distance apart, but of course the parasitic C is a bit higher.

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