Thank you, John
The ICs themselves are too small to produce significant RE but they may be a powerful RE source for distribution through PCB tracks and external cables. That’s why there is standard IEC 61967 for testing RE from ICs. Also btw, there is standard IEC 62132 for testing ICs immunity. But of course you know about that. A lot of thanks for the detailed and useful advice to Alfred, Amund, Barry, Brian, and Robert. Our team will closely and with gratitude analyze your recommendations. Best Regards, Eugene From: John Woodgate [mailto:jmw1...@btinternet.com] Sent: Friday, October 14, 2016 3:17 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] RE from Flat Panel ICs The ICs themselves are too small to produce significant RE. The RE comes from the PCB tracks and external cables. But of course you know that. With best wishes DESIGN IT IN! OOO – Own Opinions Only <http://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] Sent: Friday, October 14, 2016 10:25 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] RE from Flat Panel ICs Actually, my question was about Flat panel driver ICs, particularly about chips Intersil Techwell TW8804 and National Semiconductor DS90C385A. I had hope that somebody has valuable experience with this problem. Thank you anyway, Eugene On Friday, October 14, 2016 2:12 PM, alfred1520list <alfred1520l...@gmail.com> wrote: And general recommendations also say to reduce common mode current. But obviously this shouldn't have been said too:) On October 14, 2016 9:24:36 AM PDT, John Woodgate <jmw1...@btinternet.com> wrote: It seems to me that claiming familiarity with general recommendations severely restricts what anyone can add. The general recommendation for reducing RE is to minimise the areas of current loops by pairing 'go' and 'return' conductors on adjacent layers of the PC board. But you obviously know that already. With best wishes DESIGN IT IN! OOO – Own Opinions Only <http://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] Sent: Friday, October 14, 2016 5:08 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] RE from Flat Panel ICs Dear experts, Flat panel driver ICs are known for their high emission. I have some problems with radiated emissions particularly from chips Intersil Techwell TW8804 and National Semiconductor DS90C385A. Could you, please share your knowledge about reducing this RE. We are familiar with general recommendations. Thank you, Eugene - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-p! stc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (in! cluding how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
