Features



 Total Dose > 25 kRads(Si)





 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



 Single and Dual Output Models Include

3.3, 5, 5.2, 12, 15, ±5, ±12, ±15V



 High Efficiency - to 82%



 -55°C to +125°C Operating Temperature Range



 100M @ 500VDC Isolation



 Under-Voltage Lockout



 Short Circuit and Overload Protection



 Adjustable Output Voltage



 External Inhibit



 1,500,000 Hour MTBF

 

HYBRID-HIGH RELIABILITY

RADIATION HARDENED

DC-DC CONVERTER

M3H

M3H-SERIES

Description

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 M3L-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.

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.

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

2016-05-19

PD-94437E

+

28V Input, Single/Dual Output

Applications



 Low Earth Orbit Satellites (LEO)



 Launch Vehicles