Article View: sci.electronics
Article #3797Re: Photovoltaic charger for NiCads
From: Brian Rhodefer
Date: Mon, 20 Nov 1989 23:38
Date: Mon, 20 Nov 1989 23:38
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In article <31730@buckaroo.mips.COM> vaso@mips.COM (Vaso Bovan) writes: >In article <7200043@silver> commgrp@silver.bacs.indiana.edu writes: >> >>Remember to put a silicon diode in series to block ... reverse leakage, >>and remember that about 0.6 volt is lost in the diode's forward conduction. > >Germanium diodes (0.3V) and some schottky diodes are more efficient than >silicon diodes in low voltage charging circuits. Power MOSFETs are available with on-resistances down into the tens of milliohms nowadays. One of these, with suitable CMOS "smarts" to make it imitate a rectifier, would cut the forward losses below even those obtainable with germanium diodes. Brian Rhodefer
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!zephyr.ens.tek.com!tekig5!brianr From: brianr@tekig5.PEN.TEK.COM (Brian Rhodefer) Newsgroups: sci.electronics Subject: Re: Photovoltaic charger for NiCads Message-ID: <5071@tekig5.PEN.TEK.COM> Date: 20 Nov 89 23:38:03 GMT References: <1749@lafcol.UUCP> <7200043@silver> <31730@buckaroo.mips.COM> Reply-To: brianr@tekig5.PEN.TEK.COM (Brian Rhodefer) Organization: Tektronix, Inc., Beaverton, OR. Lines: 17