pulse and hold

[Charles Napier]

Sandy wrote:
> 
> Charlie
> 
> I have just completed the PCB manufacture of a peak and hold type of driver
> that will also work to drive an ignition coil. It is for the people on the
> EFI332 list. Some of the drivers that Mazda mentioned will only drive the
> saturated High Impedance, 1Amp, type of injectors. The only one that will
> drive the 4amp peak, 1amp hold is the, Cherry part. The Motorola parts that
> used to are discontinued, and they only have satruated drivers. I'm not sure
> about SGS.
> 
> The circuit that I used has the National LM1949 as the driver for a
> darlington or an IGBT. The circuit board is approx 2x5 and 4 driver circuits
> and a voltage regulator. For more info on it, jump on the EFI332 list. The
> short story is that the boards are $4.35 each plus shipping. A postscript
> schematic is on the EFI332 ftp site, it is not the most current, but it has
> the general idea. Also check out the National Semiconductor Web page, they
> have online data sheets, and I think you still can order some samples right
> off the web.
> 
> Sandy
> 
> Sandy


Hi Sandy,

Thanks for the reply. How do I find the other list that you mentioned?
Who has those boards for sale?

Thanks In advance

Charlie