GH2801S Datasheet, PDF (1/10 Pages) International Rectifier – HIGH RELIABILITY, HIGH EFFICIENCY RADIATION HARDENED DC-DC CONVERTER

HIGH RELIABILITY, HIGH EFFICIENCY
RADIATION HARDENED
DC-DC CONVERTER
PD-97440D
GH-SERIES
28V Input, Single Output
Description
The GH-Series is a family of low voltage single output
DC-DC converters. They are specifically designed in
response to the need for low voltage at moderate current
levels with the high efficiency and tight regulation dictated
by modern digital processing applications. The converters
are radiation hardened, high reliability converters designed for
extended operation in hostile environments. Their small
size and low weight make them ideal for applications
such as geostationary earth orbit satellites and deep
space probes. They exhibit a high tolerance to total ionizing
dose, single event effects and environmental stresses
such as temperature extremes, mechanical shock, and
vibration. All components are fully de-rated to meet the
requirements of MIL-STD-975, MIL-STD-1547 except for
the CDR type of capacitors, a capacitor with 50V rating is
used for in-circuit voltage stress of less than10V. Thorough
analyses and documentation including beginning-of-life
(BOL) and end-of-life (EOL) electrical worst case (WCA)
operation, component stress and de-rating, radiation
susceptibility (TREE), thermal stress, failure mode and
effects (FMEA), and reliability (MTBF) are available for
customer review.
The design incorporates a fixed frequency topology with
magnetic feedback. Synchronous rectification is deployed
to maximize efficiency performance. The converters include an
internal EMI filter that is capable of meeting the conducted
emission requirements of most major satellite power busses.
Incorporation of many functional features including on/off
command, remote sensing, and under-voltage lockout
make the design suitable for today’s space design applications.
The converter is enclosed in a hermetically sealed package
with the overall dimensions of 3.5"L x 2.50”W x 0.475"H
including the I/O pins and mounting tabs. The package
base material is silicon carbide-aluminum (AISIC). The
package ring frame is Alloy 48. The package utilizes
rugged ceramic feed-through copper core I/O pins and is
sealed using parallel seam welding. The total mass of a
converter is less than 110 grams.
Manufactured in a facility fully qualified to MIL-PRF-38534,
these converters are fabricated utilizing DLA Land and
Maritime qualified processes. For available screening
options, refer to device screening table in the data sheet.
1
GH
Features
 Total Ionization Dose (TID) > 100 kRad(Si)
 SEE Hardened to LET Level > 82 MeVcm²/mg
 Internal EMI filter
 Low Weight, < 110 grams
 Magnetically Coupled Feedback
 18V to 40V DC Input Range
 Up to 50W Output Power
 Single Output Models Include
1V, 1.5V, 1.8V, 2.5V, 3.3V and 5V
 High Efficiency - to 87%
 -55°C to +85°C Operating Temperature Range
 100M @ 100V_DC Isolation
 Under-Voltage Lockout
 Short Circuit and Overload Protection
 Output Voltage Adjust
 Synchronization Output and Input
 Remote Sense
 External Inhibit
Applications
 Geostationary Earth Orbit Satellites (GEO)
 Deep Space Satellites / Probes
 Strategic Weapons and Communication System
Non-flight versions of the GH-Series converters are
available for system development purposes. Variations in
electrical specifications and screening to meet custom
requirements can be accommodated.
2016-05-16