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Article #1876Re: High side driving N-channel Mosfet with PWM
From: boB
Date: Wed, 07 May 2008 05:25
Date: Wed, 07 May 2008 05:25
51 lines
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On Mon, 5 May 2008 23:53:50 +1000, "Phil Allison" <philallison@tpg.com.au> wrote: > >"Phil in Melbourne" > >> I want to PWM a whole lot of LEDs. The current consumption of the bank of >> LEDs is in the order of 15 Amps, at 12V. >> >> For reasons I won't go into, my only option is to use a high side mosfet. > > Another option would be to use a pulse transformer, and maybe some caps and diodes to drive the FET from a low side driver. >** How very dubious .... > > >> I have chosen an N-channel MOSFET (IRL3803) mainly because of its huge >> current capability and very low on resistance of 7 milli ohms. >> >> I am hoping to use PWM at a reasonably high frequency, say 20khz or >> higher, > > >** What the bloody hell for ????? > >That is just as idiotic and dubious as your first requirement. > > >> and I want to use an efficient MOSFET driver IC that is designed for the >> job. > > >** YOU want FAR too many weird sounding things YOU cannot JUSTIFY !! > > So THAT makes YOU another fuckwit, time wasting, PITA fucking TROLL. > > > Try proving me wrong, anytime - pal. > > > >..... Phil > So it looks like this one's a bit over your head, huh ? bob
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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!g2news2.google.com!news1.google.com!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!novia!novia!sequencer.newscene.com!not-for-mail From: boB <boB@> Newsgroups: sci.electronics.design,aus.electronics Subject: Re: High side driving N-channel Mosfet with PWM Date: 7 May 2008 00:25:02 -0500 Organization: K7IQ Lines: 51 Message-ID: <vme22415m44lg5pekfr2dmq62jl0ke4m89@4ax.com> References: <481eee7b$0$17511$afc38c87@news.optusnet.com.au> <688hraF2rg42lU1@mid.individual.net> X-Newsreader: Forte Agent 3.3/32.846 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Original-Bytes: 1818