[sdiy] Difficult 2164 behaviour between different sections.

Neil Johnson neil.johnson71 at gmail.com
Tue Jul 16 21:24:02 CEST 2019


ASSI wrote:

> On Tuesday, July 16, 2019 6:14:53 PM CEST David G Dixon wrote:
> > It gets so hot you almost can't touch it.  So, I'd say, yeah.
>
> "So hot you almost can't touch it" is actually a rather precisely
> determined
> temperature, about 61°C for a contact time of 2s and 50°C for 10s of
> contact
> time with a digit.  With the junction temperature likely about 20K higher
> than
> that, this temperature is well within the specifications for consumer IC,
> so
> no, I don't expect any appreciable reduction in lifetime from temperature
> alone.
>

The old SSM2164 is specified to an abs.max junction temperature of 150C and
allowing worst case power and a DIP package would put the maximum allowed
case temperature at 130C.  That would leave a burn mark on the end of your
finger.

Neil
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