Driver Boards

[Len Sabatine]

>It would appear this material bears very careful examination and dialog.
    Unless the case being of other information folks are not aware of.

     Len

>Yous guys contemplating using DR's driver boards on your OEM TPI or
>TBI setups, ought to make sure to check with DR as to whether these
>are going to work for you if you drive all (or even half) of those INJ
>drivers all at once on his board, ala batch or bank mode.
>
>This issue was raised on EFI332, but I doubt if it made it to the
>GMECM list; DR's particular design makes use of a shortcut in sharing
>multiple Cherry drivers on ONE "load resistor" (if you're familiar
>with the Cherry Driver circuit, that's the 300ohm 2W big R, normally
>assigned one per driver); hence, there was some concern about too much
>VR drop across these resistors if many/multiple drivers were to be
>turned on at once. Since the common usage on EFI332 is SEFI I guess it
>was assumed this would be OK, but since it's usually batch or bank on
>GMECM, this might be something to get cleared up before you launch.
>
>I haven't looked at the design since it was first reported, so I dunno
>if any of this has changed; just thot I should interject a caveat
>since the application is a tad different. If this old/stale/dated
>news, I beg pardon.
>
>Gar
>

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