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Article #16552Re: Voltage drop across 1N4148 diode?
From: John Whitmore
Date: Mon, 25 Jan 1993 23:44
Date: Mon, 25 Jan 1993 23:44
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In article <24JAN199300065341@rosie.uh.edu> st1my@rosie.uh.edu (Stich, Christian E.) writes: >a Schottky diode has been mentioned several times so I am looking into >replacing the 1N4148 (which is too small, that's why I asked) with another >diode is rated at up to 1A and has an as small as possible forward voltage >drop ....I'd like to find a Schottky diode that has a max. reverse >current in the micro Ampere instead of mA range. >This diode is used on the TERMPWR (SCSI-bus) line to prevent an external >device from powering the computer SCSI devices have relatively high currents in their power supplies (the SCSI drivers have fourteen 48 mA drive outputs), so a milliampere of leakage will be NO problem. In fact, it is unlikely that you will see that much leakage current (the diode is specified for power-supply operation, at full maximum operating temperature). John Whitmore
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!news.u.washington.edu!carson.u.washington.edu!whit From: whit@carson.u.washington.edu (John Whitmore) Newsgroups: sci.electronics Subject: Re: Voltage drop across 1N4148 diode? Summary: 1N5817 is OK for powering SCSI terminators Message-ID: <1k1u14INNlkk@shelley.u.washington.edu> Date: 25 Jan 93 23:44:36 GMT Article-I.D.: shelley.1k1u14INNlkk References: <1993Jan21.101200.8651@mr.med.ge.com> <1jq3dlINNp2f@shelley.u.washington.edu> <24JAN199300065341@rosie.uh.edu> Distribution: world Organization: University of Washington, Seattle Lines: 18 NNTP-Posting-Host: carson.u.washington.edu