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Article #1876

Re: High side driving N-channel Mosfet with PWM

#1876
From: boB
Date: Wed, 07 May 2008 05:25
51 lines
2100 bytes
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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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
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