a
FEATURES
28 V dc Input, 5 V dc @ 20 A, 100 W Output
(ADDC02805SA)
28 V dc Input, 3.3 V dc @ 20 A, 66 W Output
(ADDC02803SC)
Integral EMI Filter Designed to Meet MIL-STD-461D
Low Weight: 80 Grams
NAVMAT Derated
Many Protection and System Features
28 V/66 W/100 W DC/DC Converters
with Integral EMI Filter
ADDC02803SC/ADDC02805SA
FUNCTIONAL BLOCK DIAGRAM
– SENSE
+ SENSE
ADJUST
STATUS
RETURN
V
AUX
INHIBIT
SYNC
I
SHARE
TEMP
–V
IN
+V
IN
EMI FILTER
INPUT SIDE
CONTROL
CIRCUIT
FIXED
FREQUENCY
DUAL
INTERLEAVED
POWER TRAIN
RETURN
OUTPUT
FILTER
RETURN
+V
OUT
+V
OUT
+V
OUT
OUTPUT SIDE
CONTROL
CIRCUIT
ADDC02803SC
ADDC02805SA
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
PRODUCT HIGHLIGHTS
The ADDC02803SC and ADDC02805SA hybrid dc/dc con-
verters with integral EMI filters offer the highest power density
of any dc/dc converter with their features and in their power
range available today. The converters with integral EMI filters
are fixed frequency, 1 MHz square wave switching dc/dc power
supplies. They are not variable frequency resonant converters.
In addition to many protection features, these converters have
system level features that allow them to be used as components
in larger systems as well as stand-alone power supplies. The
units are designed for high reliability and high performance
applications where saving space and/or weight are critical.
The ADDC02803SC and ADDC02805SA are available in
three screening grades; all grades use a hermetically sealed,
molybdenum based hybrid package. Three screening levels
are available, including military SMD.
1. Up to 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 condi-
tions: 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
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998
AD [ ANALOG DEVICES ]
