Re: seek automobile 5.5V power

On Mon, 11 Jun 2007 18:24:28 +0100, John Devereux
<jdREMOVE@xxxxxxxxxxxxxxxxxx> wrote:

w_tom <w_tom1@xxxxxxx> writes:

On Jun 8, 1:53 pm, "2007 May" <NoS...@xxxxxxxxxxx> wrote:
Thank you Tom. Can you tell me what kind of device or circuit I should look
at for 'load dump' protection? I understand to simulate "load dump", you
charge capacitors in test fixture, and then discharge into Device under
test.

Can you give me the link to this SGS Thompson 1996 app note?

The SGS Thompson part is installed in auto electronics by the
manufacturers. But as the app notes says, that still is not
sufficient protection. As noted earlier, your designs must be
undamaged by 60 volts on the 12 volt circuit. That is why some
semiconductor manufacturers make a different line of regulators for
automotive service. How reliable must your electronics be. Then the
power supply must withstand even high voltages without damage.


There was a thread discussing some of these issues few months ago:

<http://groups.google.com/groups/search?hl=en&q=surviving+automotive+load+dump&qt_s=Search>

I remember awhile back touching on this topic..
Car More Dead from Boosting a Dead Car Battery Dec. 2006
http://groups.google.ca/group/sci.electronics.design/browse_frm/thread/aee05384bee595d7/d6c60781204704a6?lnk=st&q=boosting+a+dead+car+d+from+bc&rnum=6&hl=en#d6c60781204704a6

D from BC
.

Relevant Pages

  • Re: seek automobile 5.5V power
    ... I understand to simulate "load dump", ... charge capacitors in test fixture, and then discharge into Device under ... sufficient protection. ... undamaged by 60 volts on the 12 volt circuit. ...
    (sci.electronics.design)
  • Re: seek automobile 5.5V power
    ... I understand to simulate "load dump", ... charge capacitors in test fixture, and then discharge into Device under ... sufficient protection. ... undamaged by 60 volts on the 12 volt circuit. ...
    (sci.electronics.design)
  • Re: voltage regulator
    ... Any suggestions to avoid a phlethora of protection components? ... worry about load dump _too_ much. ... Input protection can be pretty simple if you get a 40V device; ... I am trying to avoid an inductor varistor resistor transorb capacitor ...
    (sci.electronics.design)