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And that's supposed to mean what?
That mix of units reduces my respect for the author of the paper.voltage drop across Q1 can be reduced to
10s or 100s of milliamps
That mix of units reduces my respect for the author of the paper.
So if they expect regular spikes of 87 volts for nearly half a second or so why are most electronics in automotive systems only using 16 -24 volt rated capacitors and similar rated components many with no surge or spike dampening protection of any sort?
I have dissected and worked on many electronic modules, components and electronic controls over the years and rarely have I ever seen any form of surge or spike suppression on the 12 volt feeds.
I have several old control modules from a Ford pickup I scrapped out now sitting on my computer desk today and all of them have nothing more that a 24 volt rated capacitors directly on the 12 volt supply lines where they attach to the circuit boards.
i would suspect that if there is a load that requires a good amount of current, it is located relatively far from the battery, and it is cutoff quickly then there could be a localized spike on the rail.
My brother in law spent almost $50k building a twin turbo Mustang over the last 5 years. He finally got it finished about a month ago and it dyno'ed at over 1200 HP. Last week, something happened and every electronic module in the car smoked. Wonder if it was a load dump... He said it is going to take about $7k to fix. Sucks that all it would take to protect against that would be a 100-200 amp, 100v fuse from the alternator and a 24v TVS diode. Doesn't look like a 200amp 100vDC fuse is very common though