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Article #1884Re: High side driving N-channel Mosfet with PWM
From: legg
Date: Mon, 05 May 2008 13:37
Date: Mon, 05 May 2008 13:37
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On Mon, 5 May 2008 21:24:43 +1000, "Phil in Melbourne" <reply@tonewsgroup> wrote: > >This is where the question comes in. I am looking at the option of using the >IRS2001 to switch the high side fet. But looking at the datasheet, I am >confused. How can the IRS2001 generate a voltage greater than VCC without >actually being connected to the high side voltage????? There is no talk of a >charge pump in the description and in any case it does not know what >potential the fet is connected to.. > >Maybe it is not suitable for my application as the IRS2001 seems to be used >for switch mode power supplies? I can't make sense of the first diagram on >the datasheet. > >here is a link to the datasheet: > >http://www.irf.com/product-info/datasheets/data/irs2001spbf.pdf > For your application, VCC will connect to "up to 200V" in the application schematic, on page #1. The drive supply VB is conventionally bootstrapped using the diode in the same drawing. RL
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X-Google-Thread: 112d1e,23a05bb8461714c3 X-Google-Thread: 103407,23a05bb8461714c3 X-Google-Attributes: gid112d1e,gid103407,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news3.google.com!out04b.usenetserver.com!news.usenetserver.com!in02.usenetserver.com!news.usenetserver.com!in03.usenetserver.com!news.usenetserver.com!pc02.usenetserver.com!PRIMUS.CA-a2nVz4C4Vq3uM!not-for-mail From: legg <legg@nospam.magma.ca> Newsgroups: sci.electronics.design,aus.electronics Subject: Re: High side driving N-channel Mosfet with PWM Date: Mon, 05 May 2008 09:37:21 -0400 Message-ID: <q63u14pjahllvadjd3n83d03o4la3o15qo@4ax.com> References: <481eee7b$0$17511$afc38c87@news.optusnet.com.au> X-Newsreader: Forte Agent 4.1/32.1088 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@usenetserver.com Organization: UseNetServer.com Lines: 24 X-Trace: 1f515481f0d15747cc6d322468