home *** CD-ROM | disk | FTP | other *** search
- Path: 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
-
-
- 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
-
-
-
-