High current drivers (was: RE: GMECM Digest V1 #295)

[the Fredericks]

An external driver is doable.  Cherry Semiconductor makes a nice peak and
hold IC driver that opens the injector with a large current, then drops to a
hold current when a threshold current is met.  This is nice because it
reduces power requirements and improves transient response, especially on
closure.  I'm planning to buy some of these soon to do driver upgrades to
some 148 ECUs; contact me if you want some or want to discuss building an
external driver box.

Regards,
Kendall Frederick

> -----Original Message-----
> From: owner-gmecm at esl.eng.ohio-state.edu
> [mailto:owner-gmecm at esl.eng.ohio-state.edu]On Behalf Of Carter Shore
>
> Couldn't you just build a simple current booster
> stage, driven by the Injector output from the ECM?
> Seems like a 2N3055 or TIP22 emitter follower would do
> the job nicely. Cost around $3.00 to build, plus no
> fiddling inside the ECM box.
>
> --- Nykyforuk <bnyk at oanet.com> wrote:
> >
> > Hi everyone
> >
> > After talking to some people  it seems that running
> > 3 low impedance
> > injectors off
> > one driver is not a good idea. Is there anyone out
> > there that could upgrade
> > or add
> > drivers to my 749 ECU.