PD-94518E
M3H-SERIES
+28V Input, Triple Output
HIGH RELIABILITY
RADIATION HARDENED
DC-DC CONVERTER
Description
M3H-Series is part of the International Rectifier HiRel family
of products. The M3H-Series of DC-DC converters are
radiation tolerant, high reliability devices designed for
moderate radiation environments such as those
encountered by low earth orbit satellites and launch
vehicles. For higher radiation environments, the M3G-
Series of DC-DC converters is recommended. System
upgrades to higher radiation tolerance applications can be
easily accommodated with the M3G-Series converters
because they have the same mechanical outline and are
pin compatible. For physically smaller, lower output power
single and dual output applications the L-Series of DC-DC
converters are recommended. Features of the M3H-Series
include up to 40 watt output power, small size, low weight
and 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
and MIL-STD-1547. Extensive documentation including
Radiation Susceptibility, Thermal Analysis, Stress Analysis
and MTBF are available.
M3H
Features
Total Dose > 25 kRads(Si)
SEE Hardened to LET up to 37 MeV.cm2/mg
Internal EMI filter; Converter Capable of
meeting MIL-STD-461C CE03 and CS01
Low Weight < 125 grams
Magnetically Coupled Feedback
18V to 50V Input Range
(50V, 70V, and 120V Models Available)
Up to 40W Output Power
Triple Output Models Include
+5 and ±12 or ±15V
Main output isolated from dual outputs
High Efficiency - to 82%
-55°C to +125°C Operating Temperature Range
100M @ 500VDC Isolation
Under-Voltage Lockout
Short Circuit and Overload Protection
External Inhibit
The converters incorporate a fixed frequency single forward
topology with magnetic feedback and an internal EMI filter.
These converters are capable of meeting the conducted
emissions and conducted susceptibility requirements of
MIL-STD-461C without any additional components. All
models include an external inhibit port and have an
adjustable output voltage. They are enclosed in a hermetic
3.0" x 2.5" x 0.445" steel package and weigh less than 125
grams. The package utilizes rugged ceramic feed-through
copper core pins and is sealed using parallel seam welding.
> 1,500,000 Hour MTBF
Applications
Low Earth Orbit Satellites (LEO)
Launch Vehicles
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 M3H-Series converters are
available for system development purposes. Variations in
electrical specifications and screening to meet custom
requirements can be accommodated. Consult IR HiRel San
Jose for special requirements.
1
2018-03-01
International Rectifier HiRel Products, Inc.