DVMSA28 Series
1X023DSE
11314 4th Avenue
West, Suite 206
Everett, WA 98204
http://www.vpt-inc.com
Sales Information:
Phone: (425) 353-3010
Fax: (425) 353-4030
E-mail: vptsales@vpt-inc.com
1
HIGH RELIABILITY HYBRID
EMI FILTERS
DESCRIPTION
The DVMSA28 series of hybrid EMI filters is
operable over the full military (-55 C to +125 C)
temperature range with no power derating. The
DVMSA28 EMI filter is designed to filter conducted
emissions of DVSA series DC-DC converters.
These filters are designed and manufactured in a
facility qualified to ISO9001 and certified to MIL-PRF-
38534 and MIL-STD-883.
This product may incorporate one or more of the
following U.S. patents:
5,784,266
5,790,389
5,963,438
5,999,433
6,005,780
6,084,792
6,118,673
FEATURES
High
Reliability
Wide Input Voltage Range: 0 to 50 Volts per
MIL-STD-704
Up to 0.8 Amp Maximum Current
40 dB Minimum Attenuation at 500 kHz
Industry Standard Pinout
High Input Transient Voltage: 80 Volts for 1 sec
per MIL-STD-704A
Precision Projection Welded Hermetic Package
Custom Versions Available
Additional Environmental Screening Available
Meets MIL-STD-461C and MIL-STD-461D EMC
Requirements
Protects Against Conducted Susceptibility
Specified in MIL-STD-461C, CS01 and CS02
MIL-PRF-38534 Element Evaluated
Components
Figure 1
DVMSA28 EMI Filter
(Not To Scale)
DVMSA28 Series
1X023DSE
2
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Storage Temperature
-65C to +150C
Input Voltage (Transient, 1 second)
80 Volts
Lead Solder Temperature (10 seconds)
300C
Output Current
0.8 Amps
Weight (Maximum)
11 Grams
Power Dissipation (Full Load, T
CASE
= +125C)
0.18 Watts
DVMSA28
Parameter Conditions
Min Typ
Max
Units
STATIC
Continuous 0
28
50
V
INPUT
Voltage
2
Transient, 1 sec
-
-
80
V
Current
1,2,3
Continuous 0
-
0.8
A
OUTPUT
Voltage
2
Continuous V
OUT
= V
IN
(I
IN
x R
DC
) V
Current
2,3
Continuous 0
-
0.8
A
DC RESISTANCE
Continuous
-
-
280
m
POWER DISSIPATION
2
Continuous -
-
0.18
W
NOISE REJECTION
f = 500 kHz
40
-
-
dB
CAPACITANCE
Pin to Case
10
-
30
nF
ISOLATION
Any Pin to Case, 500 V
DC
100 - -
M
MTBF (MIL-HDBK-217F)
AIF @ T
C
= 55C
-
3.15
-
MHrs
Notes: 1. Derate linearly to 0 at 135C.
2. Verified by qualification testing.
3. Rated current applies at any voltage.
BLOCK DIAGRAM
28V IN
PIN 1
IN COM
PIN 7
28V OUT
PINS 2, 3
OUT COM
PINS 5, 6
PINS 4, 8
CASE
Figure 2
DVMSA28 Series
1X023DSE
3
CONNECTION DIAGRAM
7
IN COM
5
INH
6
28V IN
1
+V OUT
2
OUT COM
LOAD
+
-
28 Vdc
2, 3
28V OUT
5, 6
OUT COM
1
28V IN
7
IN COM
4, 8
DVMSA28 EMI FILTER
8
DVSA2800S DC-DC CONVERTER
CASE
Figure 3
DVMSA28 EMI Filter Hookup with Single Converter
EMI PERFORMANCE CURVES
(T
CASE
= 25C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
Figure 4
MIL-STD-461C
Figure 5
MIL-STD-461C
DVSA2800D Without EMI Filter
DVSA2800D With DVMSA28 EMI Filter
DVMSA28 Series
1X023DSE
4
EMI MEASUREMENT METHODS CONNECTION DIAGRAMS
10 uF
10 uF
CURRENT
TRANSFORMER
+V IN
-V IN
+V OUT
-V OUT
TO D.U.T.
TO 50 OHM INPUT
Figure 6
MIL-STD-461C Measurement Method (Feedthrough Capacitor)
+V IN
-V IN
+V OUT
-V OUT
TO 50 OHM INPUT
50 uH
50 uH
Figure 7
MIL-STD-461D Measurement Method (LISN)
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