Uhh well, Centigrade is a system which is prejudiced toward the world of
water, setting a nice logical zero at the water freeze point and a nice
metric friendly 100 at the boil point of water. If we all lived on Venus,
maybe our temperature scales would be based on methane transition points.
The
A temperature *rise* of x degrees Kelvin and x degrees Celsius is the same. So
a thermal resistance of 400 degK/W = 400 degC/W.
ThetaJA is the semiconductor junction to ambient thermal resistance. Thus, if
your room is at a cosy 21 degC and you dissipate 0.2W in your LED, then the
LED’s
I agree with your analysis. Heating of any junction can occur at high current
when the contact impedance is not great due to poor contact pressure or other
factors like corrosion. We all have seen this exact same type of failure in
connectors, relays, terminal blocks, fast-on connectors, etc..
In message
945417426-1349830649-cardhu_decombobulator_blackberry.rim.net-548732016-
@b13.c21.bise6.blackberry, dated Wed, 10 Oct 2012, doug...@gmail.com
writes:
And I really dislike the 100% non-metallic types.
The original British product was called 'Scruit' and was ceramic.
Extremely
In message
4b64c938bf60be46b83b25988b0a7d7407c65...@sushdc8000.td.teradata.com,
dated Tue, 9 Oct 2012, Knighten, Jim L jim.knigh...@teradata.com
writes:
The latest edition of IEC 61000-3-12:2011 (power line harmonics for
input currents 16A) has an interpretation sheet that references IEC
John,
When equipment that has a rated current above 16 A draws a reference current
that is less
than 16 A under the specified test conditions, the manufacturer may proceed in
one of the
following ways:
1) Comply with the proportional limits as calculated, choosing the required
Rsce;
2) Comply
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