I'm working on an android controlled input/output/gauges manager for cars based on a pic24 micro controller. I'm really not an electronics expert so I had someone working on the schematics but he has no time anymore.
I previously asked a question here about the outputs schematic that he designed: Mosfet as switch for high output current and it turns out the schematic was crap!
I've found automotive high side drivers for a fair price and I think these would do the job perfectly. I want 5 outputs to drive various loads (leds, solenoids, dc motors, etc) and turn them on/off from the pic micro controller.
So I've chosen a single channel driver (for bigger loads) and a 4 channels driver (supports 12A so I would think that equates to 3A per channel?). http://www.st.com/content/ccc/resource/technical/document/datasheet/cd/1f/d3/43/b8/2d/48/0b/DM00157127.pdf/files/DM00157127.pdf/jcr:content/translations/en.DM00157127.pdf
Here is the schematic that I think would be ok for both drivers. Is 1w rating enough for the zener diode and is 1a enough for the ground diode? I think I can share them between the 2 drivers, is that correct?