Hybrid - High Reliability
Triple Output DC/DC Converters
DESCRIPTION
The ATO2800T Series of DC/DC converters
feature high power density and an extended
temperature range for use in military and indus-
trial applications. Designed to the nominal input
requirements of MIL-STD-704D, these devices
have nominal 28VDC inputs with +5V and 鹵 12V
or +5V and 鹵 15V triple outputs to satisfy a wide
range of requirements. The circuit design incorpo-
rates a pulse width modulated push-pull topology
operating in the feed-forward mode at a nominal
switching frequency of 250kHz. Input to output
isolation is achieved through the use of transform-
ers in the forward and feedback circuits.
The advanced feedback design provides fast loop
response for superior line and load transient
characteristics and offers greater reliability and
radiation tolerance than devices incorporating
optical feedback circuits.
Three standard temperature grades are offered.
Refer to Part Number section. They are provided
in a standard plug-in package for PC mounting or
in a flanged package for more severe environ-
ments.
These converters are manufactured in a facility
fully qualified to Mil-Std-1772. All processes used
to manufacture these converters have been
qualified to enable Advanced Analog to deliver
compliant devices. Two screening grades are
available to satisfy a wide range of requirements.
The CH grade converters are fully compliant to
Mil-Std-1772 class H. The HB grade converters
are processed to full class H screening but do not
have class H element evaluation as required by
Mil-Std-1772. Both grades are fully tested and
operate over the full military temperature range
without derating of output power. Variations in
electrical, mechanical and screening can be
accommodated. Extensive computer simulation
using complex modeling enables rapid design
modification to be provided. Contact Advanced
Analog with specific requirements.
ATO2800T Series
FEATURES
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16 to 40 VDC input range (28VDC nominal)
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5V, 鹵12V or 5V, 鹵15V outputs available
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Indefinite short circuit and overload protection
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15 watts output power
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Fast loop response for superior transient characteris-
tics
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Operating temperature range from -55擄C to +125擄C
available
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Popular industry standard pin-out
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Resistance seam welded case for superior long term
hermeticity
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Efficiencies up to 81%
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Shutdown from external signal
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200,000 hour MTBF at 85擄C
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