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Article #15625Voltage regulators in parallel?
From: John Purbrick
Date: Thu, 17 Dec 1992 06:10
Date: Thu, 17 Dec 1992 06:10
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1223 bytes
I want to set up a power supply delivering more current than an integrated voltage regulator (LM78xx if fixed, or LM317 if variable) will provide. It seems valid to parallel as many of the relevant component as I need to get the current; certainly they won't all pass the same current, and the voltage out will drop if the initially-highest regulator starts to overload, but it should settle to some lower voltage as other regulators start to conduct more. It seems that this would apply whether the overload was caused by overcurrent or overheating. And when all the regulators are conducting, the output should be no lower than the lowest output would have been if they were wired individually. Is there a flaw here? I can't find a reason why it won't work, but something about it doesn't feel right. John Purbrick jpexg@lcs.mit.edu
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Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!gateway From: jpexg@gaak.LCS.MIT.EDU (John Purbrick) Newsgroups: sci.electronics Subject: Voltage regulators in parallel? Date: 17 Dec 1992 00:10:02 -0600 Organization: UTexas Mail-to-News Gateway Lines: 20 Sender: daemon@cs.utexas.edu Message-ID: <9212170609.AA07808@gaak.LCS.MIT.EDU> NNTP-Posting-Host: cs.utexas.edu