HIREL DESIGN
WELDED HERMETIC PACKAGE
ALL CERAMIC CAPACITORS
SURFACE MOUNT MAGNETICS
FEATURES
REPLACES APEX FDHC461
55º TO +125ºC OPERATION
40db MINIMUM DIFFERENTIAL MODE REJECTION
AT 200 KHz
60db MINIMUM DIFFERENTIAL MODE REJECTION
FROM 500 KHzTO 50 MHz
MEETS MILSTD461C CEO3 STANDARDS FOR
MSK DHC2800 SERIES DCDC CONVERTERS
MILSTD704A THROUGH E POWER BUS
COMPATABILITY
DESCRIPTION
The EFJ2803 is a high reliability EMI filter for use with the
DAC2800/DHC2800 series of DC-DC converters. This filter
has been designed to reduce the input line reflected ripple
current to within the limit of MIL-STD-461C, CE03.
EFJ2803 hybird EMI filters utilize all ceramic capacitors,
surface mount magnetics and ultrasonically bonded alumi-
num wires to provide reliable operation at all operating tem-
peratures while surviving very high G forces.
The 8-pin package is hermetically sealed and isolated from
the internal circuits. Heat sinking is recommended for full
power operation at elevated ambient temperatures. Multiple
DC-DC converters may use the same filter, up to the rated
throughput current of the filter.
TYPICAL APPLICATION
EQUIVALENT SCHEMATIC
EXTERNAL CONNECTIONS
V
IN
+Vout
CASE
GND
OUTPUT
COMMON
INPUT
COMMON
4707 Dey Road Liverpool, N.Y. 13088
M.S.KENNEDY CORP.
(315) 701-6751
EFJ2803
ISO-9001 CERTIFIED BY DSCC
3A
EMI FILTER
Rev. - 2/01
1
1
2
3
4
5
6
7
8
+VIN
+VOUT
+VOUT
CASE GROUND
OUTPUT COMMON
OUTPUT COMMON
INPUT COMMON
CASE GROUND
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
INPUT VOLTAGE
STEADY STATE
0
28
40
V
INPUT CURRENT
DC
3
A
OUTPUT VOLTAGE
STEADY STATE
V
out
= V
in
-Iin(RDC)
Vdc
OUTPUT CURRENT
STEADY STATE
3
A
DC RESISTANCE (Rdc)
T = 125°C
0.5 @ 25°C
0.85
Ohms
DIFFERENTIAL MODE REJECTION
200 Khz
40
db
DIFFERENTIAL MODE REJECTION
500KHz50MHz
60
db
COMMON MODE REJECTION
2MHz50MHz
40
db
CAPACITANCE
ANY PIN TO CASE
4
nF
ISOLATION
ANY PIN TO CASE, 500Vdc
100
MOhm
OPERATING TEMPERATURE RANGE
CASE BASEPLATE
55
+125
ºC
STORAGE TEMPERATURE RANGE
CASE BASEPLATE
65
+150
ºC
POWER DISSIPATION
1Adc, T=125°C
0.65
0.85
W
CASE TEMPERATURE RISE
CASE TO AIR
38
°C/W
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
EFJ2803
ABSOLUTE MAXIMUM RATINGS
INPUT VOLTAGE RANGE
0-50Vdc
INPUT VOLTAGE TRANSIENT
80V @ 50ms
OUTPUT CURRENT
2
3Adc
TEMPERATURE RANGE, storage
65 to 150°C.
OPERATING TEMPERATURE, case
55 to ±125°C.
NOTES: 1.
Tcase= -55°C to 125°C unless otherwise specified.
2.
Typical Dissipation at 3 amps is 6 watts.
SPECIFICATIONS
Rev. - 2/01
2
TYPICAL PERFORMANCE
GRAPHS
EFJ2803
Rev. - 2/01
3
DHC2805S CONVERTER WITH EFJ2803 FILTER
DAC2812S CONVERTER WITH EFJ2803 FILTER
DAC2815SS CONVERTER WITH EFJ2803 FILTER
DAC2812D CONVERTER WITH EFJ2803 FILTER
DHC2803S CONVERTER WITH EFJ2803 FILTER
DAC2815D CONVERTER WITH EFJ2803 FILTER
The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make
changes to its products or specifications without notice, however, and assumes no liability for the use of its products.
Please visit our website for the most recent revision of this datasheet.
M.S. Kennedy Corp.
4707 Dey Road, Liverpool, New York 13088
Phone (315) 701-6751
FAX (315) 701-6752
www.mskennedy.com
NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
EFJ2803
The above example is an industrial grade 3 Amp EMI Filter
ORDERING INFORMATION
SCREENING
BLANK= INDUSTRIAL; E= EXTENDED RELIABILITY;
H= CLASS H; K= CLASS K
OUTPUT CURRENT
03=3A
NOMINAL INPUT VOLTAGE
GENERAL PART NUMBER
Rev. - 2/01
4
MECHANICAL SPECIFICATIONS
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