01/08/07

www.irf.com

1

AHE28XXD SERIES

Description

n 17V to 40VDC Input Range

n 28VDC Nominal Input

n ± 5V, ±12V and ±15V Outputs Available

n Indefinite Short Circuit and Overload

Protection

n 12.9W/in

n 15W Output Power

n Fast Loop Response for Superior Transient

Characteristics

n Operating Temperature Range from -55°C to

+125°C Available

n Popular Industry Standard Pin-Out

n Resistance Seam Welded Case for Superior

Long Term Hermeticity

n Efficiencies up to 82%

n Shutdown from External Signal

n Military Screening

n 314,000 hour MTBF at 85°C (AUC)

n Standard Microcircuit Drawings Available

Features

AHE

28V Input, Dual Output

The AHE 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 ±5V, ±12V and ±15V dual

outputs to satisfy a wide range of requirements. The

circuit design incorporates a pulse width modulated

push-pull topology operating in the feed-forward mode

at a nominal switching frequency of 250KHz. Input to

output isolation is achieved through the use of

transformers in the forward and feedback circuits.

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 can

be accommodated. Contact IR Santa Clara for special

requirements.

HYBRID-HIGH RELIABILITY

DC/DC CONVERTER

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.

PD-94555B