The data sheet can give some guidance in total power dissipation based on temperatures and related. The outputs use a robust High Side Switch that can drive a hefty load which is really based on how hot the ambient conditions are since these have no external heat sinks, but you can fix that very easily if you solder a small tab to the copper on the PCB. The input configuration can be on board micro-BCD switches, external logic via the header connector and a bunch of Opto-Isolated input, one specifically to address connection to an MSD or other Ignition controller. What can you do with this? Control relays, solenoids (injectors), lights, small motors. I made a few prototype board that were done by Advanced Circuits and after a bit of testing and hack coding things were up and running. Schematics and sample board layout at the end of the page. Process used was the ATMEL AVR AT90S2313 as they are cheep, fast and have a good amount of tools to program. The simple automotive grade power supply based on the LM2940 that was used in the Injector drive makes another appearance.
The output was designed with IRF High Side Switches which has some built in protection and the inputs are simple Opto-isolated for protection. The idea was to make it's input and output safe and flexible. This project was a to create a generic and simple to program controller for general automotive use.
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