07/07/11

www.irf.com

1

HYBRID - HIGH RELIABILITY

DC-DC CONVERTER

ATR28XXD SERIES

Description

Features

ATR

28V Input, Dual Output

The advanced feedback design provides fast loop

response for superior line and load transient characteristics

and offers greater reliability and radiation tolerance

than devices incorporating optical feedback circuits.

Three standard temperature grades are offered with

screening options. Refer to Part Number section. They

can be provided in a standard plug-in package for PC

mounting or in a flanged package for more severe

environments.

Manufactured in a facility fully qualified to MIL-PRF-

38534, these converters are fabricated utilizing DLA

and Land Maritime qualified processes. For available

screening options, refer to device screening table in

the data sheet. Variations in electrical, mechanical

and screening can be accommodated.

Extensive computer simulation using complex modeling

enables rapid design modification to be provided.

Contact IR San Jose with specific requirements.

The ATR28XXD Series of DC-DC converters feature

high power density and an extended temperature range

for use in military and industrial applications. Designed

to MIL-STD-704D input requirements, these devices

have nominal 28VDC inputs with ±12V and ±15V dual

outputs to satisfy a wide range of requirements. The

circuit design incorporates a pulse width modulated

single forward topology operating in the feed-forward

mode at a nominal switching frequency of 550KHz.

Input to output isolation is achieved through the use of

transformers in the forward and feedback circuits.

n 16V to 40VDC Input Range (28VDC Nominal)

n Indefinite Short Circuit and Overload Protection

n 35W/in

n 30W Output Power

n Fast Loop Response for Superior Transient

Characteristics

n Operating Temperature Range from

-55°C to +125°C

n Popular Industry Standard Pin-Out

n Resistance Seam Welded Case for Superior

Long Term Hermeticity

n Ceramic Feed-thru Pins

n External Synchronization

n High Efficiency

n Shutdown from External Signal

n Military Screening

n Standard Microcircuit Drawings Available

PD-94550B