Article View: sci.electronics
Article #11862Re: 12 v -> 3v, 0.6 a
From: John Whitmore
Date: Fri, 13 Nov 1992 00:54
Date: Fri, 13 Nov 1992 00:54
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1461 bytes
In article <1992Nov12.083015.16121@bernina.ethz.ch> schaerer@isi.ethz.ch (Thomas Schaerer) writes: >If you generate a stabilized voltage with a linear-mode- or switched- >mode-power-supply you are never shure if the circuit goes damaged in >worst case. About this you must think, because a CD-Player is an >expensive device. You shold save your CD-Player with an additional >power-zener of about 3.6V and a fast-fuse in serie of it. The zener might be a good idea, but the fuse isn't. The LM317 is internally limited, it NEVER will blow that fuse. The LM317M would be internally limited at circa 750 mA, and would be more dependable than most fuses (as well as faster acting). If the application needs more than 500 mA (measured), use an LM317; if it needs less, the LM317M or LM317H will do. The original post mentioned 600 mA, but that could have been a maximum, not an average current draw. John Whitmore
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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!news.u.washington.edu!carson.u.washington.edu!whit From: whit@carson.u.washington.edu (John Whitmore) Newsgroups: sci.electronics Subject: Re: 12 v -> 3v, 0.6 a Message-ID: <1992Nov13.005442.11157@u.washington.edu> Date: 13 Nov 92 00:54:42 GMT Article-I.D.: u.1992Nov13.005442.11157 References: <gate.1784TB1w165w@toz.buffalo.ny.us> <1992Nov12.083015.16121@bernina.ethz.ch> Sender: news@u.washington.edu (USENET News System) Organization: University of Washington, Seattle Lines: 20