Coil Driver

[Bob Wooten]

Sorry, i meant ignition coil not injector coil.  if i am not mistaken this
Harris part is specifically a ignition coil driver.

BW


> [Original Message]
> From: Rob Weinstock <weinstro at hotmail.com>
> To: <diy_efi at diy-efi.org>
> Date: 2/6/01 12:12:03 AM
> Subject: Re: Coil Driver
>
> >I was just looking @ the information from the FTP site called "combo
> >driver"  in it there is a coil driver that is a Harris piece (the part
> >number is 14N40FVL).  I was wondering if anyone has used this driver for
> >any projects & how well it worked.  It appears from the spec sheet (& the
> >print that Dave Rhoads made up) that this is a pretty straight forward
> >device.  power to the coil, coil to collector & collector to ground. 
when
> >you trigger the gate off she goes.
> 
> That device is a MOSFET power switching transistor. Unlike standard
bipolar 
> junction transistors (emitter/base/collector), this device is a field
effect 
> transistor (drain/gate/source). It requires a positive voltage to turn it 
> on.
> 
> It is not a driver by itself, at least not like the CS452/CS453 or LM1949 
> driver chips which actively monitor and control current to the fuel 
> injector. The CS45X will drive a fuel injector coil by itself. The LM1939 
> driver is designed to drive a Darlington transistor, but could be made to 
> work with a MOSFET with a little extra effort.
> 
> Think of the above transistor as a power switch for the fuel injector
coil.
> 
> Regards,
> 
> Rob
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--- Bob Wooten
--- r71chevy at earthlink.net
--- www.r71camaro.homestead.com 


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