08/11/06

www.irf.com

1

HYBRID - HIGH RELIABILITY

1 MEGA-RAD HARDENED

DC/DC CONVERTER

ARM28XXT SERIES

Description

n Total Dose > 1MRad (Si)

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 True Hermetic Package

n External Inhibit Port

n Externally Synchronizable

n Fault Tolerant Design

Features

ARM

28V Input, Triple Output

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.

Variations in electrical, mechanical and screening

specifications may be accommodated. Contact IR Santa

Clara for special requirements.

PD - 94530B