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PDF ARM28XXT Data sheet ( Hoja de datos )
| Número de pieza | ARM28XXT | |
| Descripción | HYBRID - HIGH RELIABILITY 1 MEGA-RAD HARDENED DC/DC CONVERTER | |
| Fabricantes | IRF | |
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PD - 94530B
HYBRID - HIGH RELIABILITY
1 MEGA-RAD HARDENED
DC/DC CONVERTER
ARM28XXT SERIES
28V Input, Triple Output
Description
The ARM Series of three output DC/DC converters are
designed specifically for use in the high-dose radiation
environments encountered during deep space planetary
missions. The extremely high level of radiation tolerance
inherent in the ARM design is assured as a result of
extensive research, thorough analysis and testing,
careful selection of components and lot verification
testing of finished hybrids. Many of the best circuit
design features characterizing earlier International
Rectifier products have been incorporated into the ARM
topology. Capable of uniformly high performance
through long term exposures in radiation intense
environments, this series sets the standard for distributed
power systems demanding high performance and
reliability.
The ARM converters are hermetically sealed in a
rugged, low profile package utilizing copper core pins
to minimize resistive DC losses. Long-term hermeticity
is assured through use of parallel seam welded lid
attachment along with International Rectifier’s rugged
ceramic pin-to-package seal. Axial lead orientation
facilitates preferred bulkhead mounting to the principal
heat-dissipating surface.
Manufactured in a facility fully qualified to MIL-PRF-
38534, these converters are fabricated utilizing DSCC
qualified processes. For available screening options
refer to device screening table in the data sheet.
ARM
Features
n Total Dose > 1MRad (Si)
n SEE Hardened to LET up to 83 Mev.cm2/mg
n Derated per MIL-STD-975 & MIL-STD-1547
n Output Power Range 3 to 30 Watts
n 19 to 50 Volt Input Range
n Input Undervoltage Lockout
n High Electrical Efficiency > 80%
n Full Performance from -55°C to +125°C
n Continuous Short Circuit Protection
n 12.8 W / in3 Output Power Density
n True Hermetic Package
n External Inhibit Port
n Externally Synchronizable
n Fault Tolerant Design
n 5V, ±12V or 5V, ±15V Outputs Available
Variations in electrical, mechanical and screening
specifications may be accommodated. Contact IR Santa
Clara for special requirements.
www.irf.com
1
08/11/06
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1 page  
ARM28XXT Series
Radiation Performance
The radiation tolerance characteristics inherent in the
ARM28XXT converter are based on the results of the
ground-up design effort on the ART2800T program and
started with specific radiation design goals. By imposing
sufficiently large margins on those electrical parameters
subject to the degrading effects of radiation, appropriate
elements were selected for incorporation into the
ART2800T 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.
radiation performance variations. Radiation tests on
random ART2800T manufacturing lots provide continued
confirmation of the soundness of the design goals as well
as justification for the element selection criteria.
To achieve the radiation levels specified for the ARM28XXT,
the ART2800T topology is utilized as the basis but lot
assurance testing is utilized as part of the screening
process to assure the specified level. Each ARM28XXT
converter is delivered with lot test data at the hybrid level
supporting the minimum TID specification. Other radiation
specifications are assured by design and generic data are
available on request.
The principal ART2800T design goal was a converter
topology, which because of large design margins, had
radiation performance essentially independent of wafer-lot
The following table specifies guaranteed minimum radiation
exposure levels tolerated while maintaining specification limits.
Radiation Specification Tcase = 25°C
Test
Conditions
Min Unit
Total Ionizing Dose
MIL-STD-883, Method 1019.4
Operating bias applied during exposure
1,000
KRads
(Si)
Dose Rate
Temporary Saturation
Survival
MIL-STD-883, Method 1021
1E8
1E11
Rads
(Si)/sec
Neutron Fluence
MIL-STD-883, Method 1017.2
3E12
Neutron
/cm²
Heavy Ions
(Single event effects)
BNL Tandem Van de Graaff Generator
83 MeV•
cm²/mg
International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.
Standard Quality Conformance Inspections on ARM28XXT Series (Flight Screened)
Inspection
Group A
Group B
Group C
Group D
Application
Part of Screening on Each Unit
Each Inspection Lot
First Inspection Lot or
Following Class 1 Change
In Line (Part of Element Evaluation)
Samples
100%
* 5 units
10 units
3 units
* Group B quantity for Option 2 End of Line QCI. No Group B samples reuired for Option 1, In-line.
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ARM28XXT Series
Performance Characteristics (Typical @ 25°C) (Continued)
Figure IX. ±15 V Regulation Curves
For Three conditions of Load on the 5 Volt Output.
17.0
5V Load = 3.0A
5V Load = 1.5A
16.0 5V Load = 150 mA
15.0
14.0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Output Current (Each Output)
Figure X. Cross Regulation Curves
5 Volt Output as a function of 15 Volt Load Current for Three 5 Volt Loads.
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
0
5V Load = 150mA
5V Load = 1.5A
5V Load = 3.0A
0.1 0.2 0.3 0.4 0.5 0.6
±15 Volt Load Current
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| PDF Descargar | [ Datasheet ARM28XXT.PDF ] | |
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