Disagree. A switched mode power supply (SMPS) will draw more current at low bus potential to provide constant load output power.
---------- >From: Bl Ma <mbl...@yahoo.com> >To: mschm...@xrite.com >Cc: EMC/PS IEEE Group <emc-p...@ieee.org> >Subject: RE: 90V & 47Hz - Is this a realistic combo >Date: Thu, Nov 4, 1999, 11:12 AM > > > Mark, > > Please pardon my ignorance. I have a silly question. > It seems to me that the purpose of brownout is to save > energy by reducing voltage. Why do you test your power > supply "down to 85 Vac at 50/60 Hz at the maximum > specified operating temperature with high humidity > conditions present" instead of "up to 106 Vac ..."? > Higher voltage would consume more energy and produce > more heat inside the power supply. > > Barry Ma > Anritsu > --------------------- > From: "Mark Schmidt" <mschm...@xrite.com>, on 11/4/99 > 9:45 AM: > > Eastern Japan Voltage 100 Vac @ 50Hz. (Tokyo, > Kawasaki, Sapporo, Yokohoma and Sebdai) > Western Japan Voltage 100 Vac @ 60Hz. (Osaka, Kyoto, > Nagoya, Hiroshima) > > I also agree with Tania and the brown-out conditions > that exist in Japan. It is my understanding that 90 > Vac is quite common, personally I would test down to > 85 Vac at 50/60 Hz at the maximum specified operating > temperature with high humidity conditions present. > ---------------------- > From: "Grant, Tania (Tania)" <tgr...@lucent.com>, on > 11/3/99 4:40 PM: > > Ages ago when I worked at another company that shipped > products to Japan, their unwritten rule was to design > in power supplies that operated without problems at 85 > Vac, and that had better be designed/tested down to 80 > Vac, because of the continued brown-out conditions in > Japan. It seems nothing much has changed. > > I don't remember what was stated about the frequency > tolerance. > > Tania Grant, tgr...@lucent.com <tgr...@lucent.com> > Lucent Technologies, Communications Applications Group > > > > > > > ===== > Barry Ma > __________________________________________________ > Do You Yahoo!? > Bid and sell for free at http://auctions.yahoo.com > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
