GH2803R3SCKX Datasheet, PDF (1/9 Pages) International Rectifier – HIGH RELIABILITY, HIGH EFFICIENCY RADIATION HARDENED DC-DC CONVERTER

PD-97440C
HIGH RELIABILITY, HIGH EFFICIENCY
RADIATION HARDENED
DC-DC CONVERTER
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.
www.irf.com
GH
Features
n Total Ionizing Dose (TID) > 100 KRad(Si)
n SEE Hardened to LET Level > 82 MeV.cm²/mg
n Internal EMI filter
n Low Weight, < 110 grams
n Magnetically Coupled Feedback
n 18V to 40V DC Input Range
n Up to 50W Output Power
n Single Output Models Include
1V, 1.5V, 1.8V, 2.5V, 3.3V and 5V
n High Efficiency - to 87%
n -55°C to +85°C Operating Temperature Range
n 100MΩ @ 100VDC Isolation
n Under-Voltage Lockout
n Short Circuit and Overload Protection
n Output Voltage Adjust
n Synchronization Output and Input
n Remote Sense
n External Inhibit
Applications
n Deep Space Satellites / Probes
n Strategic Weapons and Communication System
n Geostationary Earth Orbit Satellites (GEO)
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.
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.
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10/12/12