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Article #1894Re: High side driving N-channel Mosfet with PWM
From: terryc
Date: Tue, 06 May 2008 02:17
Date: Tue, 06 May 2008 02:17
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On Tue, 06 May 2008 12:03:08 +1000, Phil in Melbourne wrote: > > "terryc" <newssixspam-spam@woa.com.au> wrote in message > news:pan.2008.05.06.00.23.14.139680@woa.com.au... >> On Mon, 05 May 2008 21:24:43 +1000, Phil in Melbourne wrote: >> >>> 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. >> >> Can you explain why you can not just break this down into multiple units >> all centrally driven? say 15 units drawing 1amp each, or 30 units drawing >> 500mA? > > It would be less convenient, but that is possible, and may end up being the > way I go. I was thinking that would avoid the all eggs in one basket. if one unit fails, it only takes out that fraction. The other point is the frequency and duty cycle might be such that instead of having to deal with an intermittent 15Amps, you could be dealing with a consistent 5amps say or less.
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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!news4.google.com!feeder1-2.proxad.net!proxad.net!feeder1-1.proxad.net!club-internet.fr!feedme-small.clubint.net!aioe.org!not-for-mail From: terryc <newssixspam-spam@woa.com.au> Newsgroups: sci.electronics.design,aus.electronics Subject: Re: High side driving N-channel Mosfet with PWM Date: Tue, 06 May 2008 12:17:32 +1000 Organization: Aioe.org NNTP Server Lines: 24 Message-ID: <pan.2008.05.06.02.17.31.277841@woa.com.au> References: <481eee7b$0$17511$afc38c87@news.optusnet.com.au> <pan.2008.05.06.00.23.14.139680@woa.com.au> <481fbc5d$0$17510$afc38c87@news.optusnet.com.au> NNTP-Posting-Host: pzutpEJIX6xwFei68irndg.user.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Complaints-To: abuse@aioe.org User-Agent: Pan/0.14.2.91 (As She Crawled Across the Table (Debian GNU/Linux))