Injector Driver Module

[Orin Eman]

>  Thanks for your response, Greg.

>   I have looked at the EFI332 design, but I have not been able to find any info on the injector driver's design other that they use National's injector driver IC, and some other electronic parts.
>   That does not help me a lot, since the power dissipation on the injector driver, using a peak and hold driver, is not dependant upon the driver IC itself, but on the system voltage, the hold current, duty cycle, and the injector coil's resistance.

Find the datasheet on the National part (LM1949).  It has a section on
power dissipation including how to use it as a switching driver.
The tradeoff is you end up generating lots of RFI.  They claim a
fourfold reduction in power dissipation in the power transistor in
their tests.

Orin.