[time-nuts] HP10811 Oscillator Thermal Fuse

Donald E. Pauly trojancowboy at gmail.com
Thu May 11 20:56:49 EDT 2017


While I find traces of your article quoted, it seems to have vanished.
It lead me to this interesting article of 16 pages on electronic fires
by a fire investigator.  There is a lot here for designers when it
comes to preventing fires from your products.  I would never have
dreamed of some of the ways that fires can start.



---------- Forwarded message ----------
From: Van Horn, David <david.vanhorn at backcountryaccess.com>
Date: Thu, May 11, 2017 at 4:31 PM
Subject: Re: [time-nuts] Fwd: HP10811 Oscillator Thermal Fuse
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>

There's an excellent article out there on the web called "Low Voltage,
the incompetent ignition source"  I highly recommend a read.
I dealt with a case like this a couple years ago.  Failed fet in an H
bridge caused a fault which the brick SMPS picked up as a short, and
went into "hiccup" mode on.
The energy delivered in "hiccup" mode was about 1W average, and that
was enough, after several hours, to cause ignition and sustained flame
on the PCB.

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