11. September 2015 09:08 by streng in
The suppliers of automotive electronic devices are competing these days to lower the cost of theirs designs. This is a sample of rather expensive solution to ensure proper function of an automotive electronic device during transients on supply lines (12V Battery).
![](/EMCFLEXBLOG/image.axd?picture=/EMCLAB/PNG/Transients/Cold_Crank_Reverse_Polarity_Load_Dump_Protection.png)
![](/EMCFLEXBLOG/image.axd?picture=/EMCLAB/PNG/Transients/Reverse_Polarity.png)
Sample of less expensive solution to prevent reverse polarity, load dump, and cranking pulse from disturbing circuits sourced from a 5V voltage regulator or directly from the 12V B+ line.
![](/EMCFLEXBLOG/image.axd?picture=/EMCLAB/PNG/Transients/Sample_Filter_02.png)