Some important design factors for these units (one was mentioned) are the core materials and gapping technique, and switching freq. I can understand an increased price, but am not certain why the unit would be larger.
Most (western) smps manufacturers are offering units that have both higher eff and smaller size. luck, Brian > -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf Of Tyra, > John > Sent: Thursday, April 19, 2007 6:19 AM > To: Clif Brick; [email protected] > Subject: RE: California 2006 Appliance Efficiency Regulations > > > Hello Cliff, > > We have found that a complaint CEC power supply to be larger > in size and > more expensive then a noncompliant one as our power supply > vendors have > to use better quality core material and the transformer ends up being > larger. > > The cost is not insignificant if you have a large volume product which > uses a wall wart.... > > Regards, > > John Tyra > Manager Product Safety > > Bose Corporation > The Mountain, MS-450 > Framingham, MA 01701-9168 > > Phone: 508-766-1502 > Fax: 508-766-1145 > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Clif > Brick > Sent: Wednesday, April 18, 2007 5:01 PM > To: [email protected] > Subject: RE: California 2006 Appliance Efficiency Regulations > > Greetings, > > The later implementation dates for the California efficency > rules were > accepted, however the new deadline is coming up quickly. I'm > trying to > determine, for the benefit of our purchasing group, what others have > found relative to the cost of a direct plug in type class 2 > adapter (aka > wall wart) that complies with the efficiency limits vs. one > that was of > the non compliant type. > > Any info you can or would share is appreciated. > > Best regards, > > Clif Brick > > Clifton Brick > Product Safety and Regulatory Manager > Radio Systems Corporation > 10427 Electric Ave > Knoxville, TN 37932 > Phone 865-218-1557 > Fax 865-671-6855 - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
