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Article #1598Re: Understanding a split-mode power supply.
From: Phil Allison
Date: Thu, 08 Jan 2009 04:17
Date: Thu, 08 Jan 2009 04:17
38 lines
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2291 bytes
"Arfa Daily" > It's not at all uncommon to see switchers that are secondary-side > linear-regulated only. I worked on a mixer / PA just a couple of weeks ago > which had a full blown switcher in it. The main rails for the output > stages had no regulation at all, and were completely dependant on the > input line voltage. ** Such amplifier supplies are actually push pull, square wave inverters. It is not possible to have regulated output without the using an active PFC/regulator stage prior to the main inverter. Also, because the inverter's output IS a square wave, full wave rectification produces a pure DC voltage. > So what was the advantage of complicating things by using a switcher ? ** Major sales gimmick. > I can only assume that it's primarily because it's a portable item of band > equipment, so it makes it much lighter to carry around. ** The big joke is that at least 95% of all such amplifiers are permanently installed in venues. Plus musos love to buy the heaviest tube amps they can find and use them with heaviest speakers ever made. ...... Phil
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X-Google-Thread: 112d1e,3f5de0c6e381c3d6 X-Google-Thread: 1131b0,3f5de0c6e381c3d6 X-Google-Thread: 103407,3f5de0c6e381c3d6 X-Google-Attributes: gid112d1e,gid1131b0,gid103407,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news1.google.com!news.glorb.com!feeder.erje.net!newsfeed01.sul.t-online.de!t-online.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Phil Allison" <philallison@tpg.com.au> Newsgroups: sci.electronics.design,sci.electronics.repair,aus.electronics Subject: Re: Understanding a split-mode power supply. Date: Thu, 8 Jan 2009 15:17:50 +1100 Lines: 41 Message-ID: <6sld39F69jq6U1@mid.individual.net> References: <49601fcc$0$26314$afc38c87@news.optusnet.com.au> <4964169c$0$25646$afc38c87@news.optusnet.com.au> <eK_8l.140589$m53.91179@newsfe04.ams2> X-Trace: individual.net GAs2/BrwiYt53bRsGGnvVAuwAUY+9V0HD9GPM4aMSv3+JuxOVF Cancel-Lock: sha1:7ZND6dNZPNRxgocweluPY5JShmo= X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 X-RFC2646: Format=Flowed; Response