I read in !emc-pstc that Van Compernolle, Eric <Eric.Vancompernolle@barc o.com> wrote (in <[email protected] o.com>) about 'heating (temperature) test on SMPS with CB report EN 60950' on Mon, 26 Jan 2004:
> This is probably due to the fact that we are coupling in some wrong > signals on a feedback circuit. We tried it several times with the > same result: failure of the PFC part of the SMPS. > How have you eliminated the possibility that the thing is RALLY getting too hot? Maybe the manufacturer tested the unit on a.c. power with different characteristics from yours. If your a.c. supply has a much lower source impedance (high current rating), the PFC may be working much harder. -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
