OBSOLETE

FUNCTIONAL BLOCK DIAGRAM

OUTPUT SIDE

CONTROL

CIRCUIT

INPUT SIDE

CONTROL

CIRCUIT

EMI FILTER

OUTPUT

FILTER

RETURN

+ SENSE

ADJUST

STATUS

INHIBIT

SYNC

TEMP

FIXED

FREQUENCY

DUAL

INTERLEAVED

POWER TRAIN

– SENSE

RETURN

RETURN

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

a

ADDC02805S

© Analog Devices, Inc., 1995

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

FEATURES

28 V dc Input, 5 V dc @ 20 A, 100 W Output

Integral EMI Filter Designed to Meet MIL-STD-461D

Low Weight: 80 Grams

NAVMAT Derated

Many Protection and System Features

APPLICATIONS

Commercial and Military Airborne Electronics

Missile Electronics

Space-Based Antennae and Vehicles

Mobile/Portable Ground Equipment

Distributed Power Architecture for Active Array Radar

GENERAL DESCRIPTION

The ADDC02805S hybrid dc/dc converter with integral EMI

filter offers the highest power density of any dc/dc converter

with its features and in its power range available today. The

converter with integral EMI filter is a fixed frequency, 1 MHz,

square wave switching dc/dc power supply. It is not a variable

frequency resonant converter. In addition to many protection

features, this converter has system level features that allow it to

be used as a component in larger systems as well as a stand-

alone power supply. The unit is designed for high reliability and

high performance applications where saving space and/or weight

are critical.

The ADDC02805S is available in three screening grades; all

grades use a hermetically sealed, molybdenum based hybrid

package. Contact factory for MIL-STD-883 device availability.

28 V/100 W DC/DC Converter

with Integral EMI Filter

PRODUCT HIGHLIGHTS

1. 60 W/cubic inch power density with an integral EMI filter

designed to meet all applicable requirements in MIL-STD-

461D when installed in a typical system setup.

2. Light weight: 80 grams

3. Operational and survivable over a wide range of input

conditions: 16 V–50 V dc; survives low line, high line, and

positive and negative transients. See section entitled: Input

Voltage Range.

4. High reliability; NAVMAT derated

5. Protection features include:

Output Overvoltage Protection

Output Short Circuit Current Protection

Thermal Monitor/Shutdown

Input Overvoltage Shutdown

Input Transient Protection

6. System level features include:

Current Sharing for Parallel Operation

Inhibit Control

Output Status Signal

Synchronization for Multiple Units

Input Referenced Auxiliary Voltage Supply