SMPS EMI issues
in [Design]
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From: dbvanhorn on 5 May 2010 09:31 > We use the BPS-2-14-00 and will be using the BPS-0.5-14-00 in some of our > designs. These BPS supplies require an external X2 100nF cap to meet the > EN55015 specs and even then they only just scrape a pass. However a new > design is currently in production as far as I'm aware which should improve > matters. I'll be testing the the BPS-0.5 in a new design soon. I'll report > back here if it's of interest. > regds. > JB Interesting. Are you two layer or more? Most of our designs are two layer, and crowded enough that we would have trouble getting much of a pour on either side.
From: JB on 6 May 2010 03:08 "dbvanhorn" <microbrix(a)gmail.com> wrote in message news:5abd5521-72f4-4366-9a78-c07fe880fbd8(a)u3g2000prl.googlegroups.com... > >> We use the BPS-2-14-00 and will be using the BPS-0.5-14-00 in some of our >> designs. These BPS supplies require an external X2 100nF cap to meet the >> EN55015 specs and even then they only just scrape a pass. However a new >> design is currently in production as far as I'm aware which should >> improve >> matters. I'll be testing the the BPS-0.5 in a new design soon. I'll >> report >> back here if it's of interest. >> regds. >> JB > > > Interesting. Are you two layer or more? Most of our designs are two > layer, and crowded enough that we would have trouble getting much of a > pour on either side. Ours are 2-layer but we're fortunate in that there are no components on the bottom layer at all and none really that close on the top layer either apart from the X2 cap. JB
From: dbvanhorn on 6 May 2010 10:58
Ok, thanks for the info. |