> From: Robin Bussell <RobinB@excelerate.info>
> Subject: [EE] Automotive DC supply conditions
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> Hi Folks,
>        Does anyone have a reference for what is considered the standard "=
Automotive 12VDC" supply ... i.e. what range of voltages/ spikes/ noise a p=
iece of equipment powered by a typical car will have to cope with?
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> Many Thanks,
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> Robin Bussell,

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Google CISPR25. It is quite involved but generally for a 12V system any sil=
icon exposed to battery voltage will be 45V minimum with a suitably rated T=
VS across the front end to deal with load dump. Depending on the applicatio=
n you can ride out load dump or power down, if you don't need to be functio=
nal after load dump then you can just size the TVS to blow the fuse.
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