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ART28XXT Datasheet(PDF) 5 Page - International Rectifier

Part No. ART28XXT
Description  28V Input, Triple Output / HYBRID - HIGH RELIABILITY RADIATION HARDENED DC/DC CONVERTER
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Maker  IRF [International Rectifier]
Homepage  http://www.irf.com
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ART28XXT Datasheet(HTML) 5 Page - International Rectifier

 
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5
ART28XXT Series
Radiation Performance
The radiation tolerance characteristics inherent in the
ART28XXT converter are the direct result of a carefully
planned ground-up design program with specific radiation
design goals. After identification of the general circuit
topology, a primary task of the design effort was selection
of appropriate elements from the list of devices for which
extensive radiation effects data was available. By imposing
sufficiently large margins on those electrical parameters
subject to the degrading effects of radiation, designers
were able to select appropriate elements for incorporation
into the circuit. Known radiation data was utilized for input
to PSPICE and RadSPICE in the generation of circuit
performance verification analyses. Thus, electrical
performance capability under all environmental conditions
including radiation was well understood before first
application of power to the inputs.
A principal design goal was a converter topology that,
because of large design margins, had radiation performance
essentially independent of normal elemental lot radiation
Completion of first article fabrication, screening and
standard environmental testing was followed by radiation
testing to confirm design goals. All design goals were met
handily and in most cases exceeded by large margin.
These test samples were built with elements that, with the
foregoing exceptions, were not screened for radiation
characteristics. Additional radiation tests on subsequent
ART28XXT manufacturing lots provide continued
confirmation of the soundness of the design goals as well
as justification for the element selection criteria.
The following table specifies guaranteed minimum radiation
exposure levels tolerated while maintaining specification
limits.
performance variations. In the few instances where such
margins were not assured, element lots were selected
from which die were fabricated (and characterized) as
radiation hard devices so that realization of the design
goals could be assured.
Radiation Specification T
case = 25°C
Test
Conditions
Min
Unit
Total Ionizing Dose
(2:1 Margin)
MIL-STD-883, Method 1019.4
Operating bias applied during exposure
200
krad
(Si)
Dose Rate
Temporary Saturation
Survival
MIL-STD-883, Method 1021
1E8
1E11
Rads
(Si)/sec
Heavy Ions
(Single event effects)
BNL Dual Van de Graf Generator
83
MeV•
cm²/mg


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