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Subject:	Re: [geda-user] [off-topic] 24V automotive (truck) design issues
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From:	"Richard Rasker (rasker AT linetec DOT nl) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Message-ID:	<379ffc40-24ac-1621-6410-9518bc4e72a7@linetec.nl>
Date:	Sun, 2 Dec 2018 15:26:49 +0100
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Hello Bob,

Op 29-11-18 om 15:47 schreef Bob Paddock (graceindustries AT gmail DOT com) 
[via geda-user AT delorie DOT com]:
> On Thu, Nov 29, 2018 at 4:38 AM Richard Rasker (rasker AT linetec DOT nl)
> [via geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
>
>> I'm thinking about a disconnect circuit,...
> Take a look at the LTC7860 for some ideas of what is needed.
> Page 28 has a 28V Nom. Vout surge stopper example.

Yeah, I find this device almost exclusively when looking for automotive 
supply protection.

I decided on a slightly simpler solution based on my disconnect circuit 
(with a rather heavier PMOS device), plus a buck regulator with a 
TPS54260Q device.

> https://www.analog.com/media/en/technical-documentation/data-sheets/7860f.pdf
>
> Also be aware of "AN88 - Ceramic Input Capacitors Can Cause
> Overvoltage Transients".
> Some transants can be self-inflicted.  Don't know if it applies in
> your design or not.

No, this isn't really a problem.

Anyway, thanks for your comments!

Best regards,

Richard Rasker

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