INTERPOINT FMD28

Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
Features
Attenuation to 50 dB at 500 kHz
• Operating temperature -55° to +125°C
• Nominal 28 V input, 0 to 50 V operation
• Transient rating to 100 V for 100 ms
• Up to 7 A throughput current
• Compliant to MIL-STD-461C, CE03
• Compatible with MIL-STD-704 A-E 28 VDC power bus
Description
The FMD28 Series™ EMI filters are specifically designed to
reduce the reflected input ripple current of Interpoint’s high
frequency DC/DC converters. FMD filters minimize electromagnetic interference (EMI) for the MOR, MFL, MTR, MHV,
MHF+, MHF, MTO and MHE Series of converters. These filters
are intended for use in 28 volt applications which must meet
MIL-STD-461C CE03 levels of conducted emissions. One filter
can be used with multiple converters up to the rated output
current of the filter.
Input Ripple and EMI
Switching DC/DC converters naturally generate two noise
components on the power input line: differential noise and
common mode noise. Input ripple current refers to both of these
components. Differential noise occurs between the positive input
and input common. Most Interpoint converters have an input filter
that reduces differential noise which is sufficient for many applications. Common mode noise occurs across stray capacitances
between the converter’s power train components and the baseplate (bottom of the package) of the converter.
Where low noise currents are required to meet CE03 of
MIL-STD-461C a power line filters reduces the common mode
and differential noise generated by the converters. FMD28461 filters reduce input ripple current by as much as 50 dB
at 500 kHz when used in conjunction with Interpoint’s DC/DC
converters.
Crane Aerospace & Electronics
Electronics Group (Interpoint Brand)
PO Box 97005 • Redmond WA 98073-9705
425.882.3100 • [email protected]
www.interpoint.com
Place the filter as close as possible to the converter for optimum
performance. The baseplates of the filter and the converter
should be connected with the shortest and widest possible
conductors.
Transients
A transient of 100 V for up to 100 ms with a 0.5 ohm source
impedance will not damage the filter.
Operation over Temperature
The FMD28-461 Series filters are rated for full power operation from -55°C to +125°C case temperature. Current is derated
linearly to zero at +135°C case temperature.
Insertion Loss
The maximum dc insertion loss at full load and nominal input
voltage represents a power loss of less than 1.3%.
Packaging
FMD28-461 filters are sealed in metal hermetic, down-leaded
packages (case J4). Also available in a side-leaded package
(case U).
Page 1 of 8
FMD28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
Operating Conditions and
characteristics
mechanical and environmental
Size (maximum)
•Case J4, FMD28-461
‣‣2.720 x 1.350 x 0.505 inches (69.09 x 34.29 x 12.83 mm)
‣‣Shown on page 1 in Case J4 (down-leaded).
•Case U, FMD28-461SL
3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)
Input Voltage Range
•0 to 50 VDC continuous
•Transient +100 V for 100 ms
Lead Soldering Temperature (10 sec per lead)
•300°C
Weight (maximum)
•Case J4: 55 grams typical
•Case U: 77 grams typical
Storage Temperature Range (Case)
•-65°C to +150°C
Case Operating Temperature (TC)
•-55°C to +125°C full power
•-55°C to +135°C absolute
Screening
FMD28 is offered with 125°C Standard and /ES, non-QML
screening. See Standard and /ES (non-QML) screening tables for
more information on page 8.
Derating Input/Output Current
•Linearly from 100% at 125°C to 0% at 135° C
Isolation
•100 megohm minimum at 500 VDC
EMI FILTER
+Vin
DC/DC CONVERTER
+Vin
+Vout
+Vout
Case
Output
Input
Common Common
Case
Output
Input
Common Common
Multiple units
allowed up to
rated output
current of filter
Chassis
ground
RL
RL
The case ground connection between the filter and the converter should be as
low an impedance as possible to minimize EMI. Direct contact of baseplate to
chassis ground provides the lowest impedance.
Figure 1: Connection Diagram
Positive
Output
Positive
Input
Output
Common
Input
Common
FMD28-461
Figure 2: FMD28-461 Schematic
www.interpoint.com
Page 2 of 8
FMD28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
Pin Out down-Leaded Model
Pin
Designation
1
Positive Input
3
Output Common
2
4
5
Squared corner and dot on top
of package indicate pin one.
Positive Output
1
2
BOTTOM VIEW
FMD28-461
Case Ground 1
Input Common
See case J4 for dimensions.
5
Note
1. Although the down-leaded packages can be
connected to chassis ground with the case
ground lead, direct contact of the base plate to
chassis improves EMI performance.
4
3
Figure 3: Pin Out FMD28-461
Pin Out Side-Leaded models
Pin 1
1, 2, 3
4, 5, 6
7, 8, 9
10, 11, 12
—
Designation
Angled corner and cover marking indicate pin one.
Positive Input
Input Common
1
Output Common
2
Positive Output
3
Case Ground 2
4
Notes
1. All pins must be connected.
2. The baseplate is the only case ground connection and
should directly contact chassis ground. www.interpoint.com
TOP VIEW
FMD28-461
12
11
Outline shown is case U, pin out is the same
for all cases. See cases U, V, W, Y, and Z
for dimensions.
10
9
5
8
6
7
Figure 4: Pin Out FMD28-461SL
Page 3 of 8
FMD28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
model numbering key
FMD
Base Model
Input Voltage
28 - 461
SL / ES
MIL-STD-461 Reference
Case/Lead Option*
Screening
(Standard screening has no designator
in this position.)
*Case/Lead Option:
For drawings and dimensions see cases J4 (case option is
left blank) and U (case option is SL).
model selection
On the lines below, enter one selection from each category
to determine the model number.
Category
Selection
FMD28
-461
_______
Base Model and
Input Voltage
MIL-STD-461 Reference
Case/Lead
option 1
Screening 2
Down-leaded
(leave blank)
Standard (leave blank)
SL (case U,
side-leaded)
ES
“FMD28” is the
only available
selection
“-461” is the only
available selection
/
______
Notes:
1. Case J4 is the standard, down-leaded case. Leave the option blank for case J4. Refer to the case drawings on pages 6 and 7 for other case options.
2. Leave blank for standard screening. Use “ES” for “ES” screening. See the table on page 8 for more information.
www.interpoint.com
Page 4 of 8
FMD28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
Electrical Characteristics: 25°C TC, nominal Vin, unless otherwise specified.
MODEL
FMD28-461
PARAMETER
CONDITIONS
MIN
TYP
INPUT VOLTAGE
CONTINUOUS
0
28
50 1
NOISE REJECTION
DC RESISTANCE (RDC)
AT MAXIMUM CURRENT 1
CAPACITANCE 1
MAX
TRANSIENT 100 ms 1, 2
-100
—
100
500 kHz
50
60
—
1 MHz
45
55
—
TC = 25°C
—
—
0.12
—
—
0.15
TC = 125°C
UNITS
VDC
V
dB
Ω
ANY PIN TO CASE
20,000
pF
OUTPUT VOLTAGE
STEADY STATE
VOUT = VIN - IIN (RDC)
VDC
OUTPUT CURRENT
STEADY STATE
—
TC = 25°C
TC = 125°C 1
—
—
6.0
—
—
7.4
POWER DISSIPATION
AT MAXIMUM CURRENT 1
Note
1. Guaranteed by design, not tested.
2. 0.5 ohm source impedance
www.interpoint.com
Page 5 of 8
FMD28 Rev C - 20100226
—
7
A
W
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters – Cases
28 Volt input – 7 Amp
BOTTOM VIEW CASE J4
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.350 max. (34.29)
1.173 (29.79)
1
0.040 dia.
(1.02)
2
0.162 dia
(4.11)
4
3
1.770 (44.96)
5
0.173
(4.39)
1.370 (34.80)
0.673
(17.09)
Solder Tip-off
2.150 (54.61)
0.000
0.170 (4.32)
0.210 (5.33)
0.25 (6.4)
0.000
0.457 max
(11.61)
0.000
2.720 max
(69.09)
Flange Thickness: 0.067 +0.005/-0.007 (1.70 +0.13/-0.8)
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.3) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage the device. Solder pins
individually with heat application not exceeding 300°C for 10 seconds per pin.
Materials
Header
Cold Rolled Steel/Nickel/Gold
Cover
Kovar/Nickel
Pins
#52 alloy/Gold compression glass seal.
Seal Hole: 0.091 ±0.002 (2.31 ±0.05)
Case J4 FMD, Rev F, 20091105
Please refer to the numerical dimensions for accuracy. All information is believed to
be accurate, but no responsibility is assumed for errors or omissions. Interpoint
reserves the right to make changes in products or specifications without notice.
Copyright © 1999-2009 Interpoint Corp. All rights reserved.
Figure 5: Case J4 - FMD28-461
www.interpoint.com
Page 6 of 8
FMD28 Rev C - 20100226
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters – Cases
28 Volt input – 7 Amp
TOP VIEW CASE U*
Flanged case, short-leaded
*Does not require designator in Case Option position of model number.
Seam Seal
0.23 (5.8) Pin Length
0.128 dia
(3.25).
1.505 (38.23) max.
11
3
10
0.650 (16.51)
4
9
0.450 (11.43)
5
8
0.250 (6.35)
6
7
0.000
0.120 (3.05)
0.000
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.3) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage the device. Solder pins
individually with heat application not exceeding 300°C for 10 seconds per pin.
Materials
Header
Cold Rolled Steel/Nickel/Gold
Cover
Kovar/Nickel
Pins
#52 alloy/Gold, compression glass seal
Seal Hole: 0.100 ±0.002 (2.54 ±0.05)
Case U, Rev E, 20100401
Please refer to the numerical dimensions for accuracy. All information is believed to
be accurate, but no responsibility is assumed for errors or omissions. Interpoint
reserves the right to make changes in products or specifications without notice.
Copyright © 1999-2010 Interpoint Corp. All rights reserved.
Figure 6: Case U - FMD28-461SL
www.interpoint.com
Page 7 of 8
FMD28 Rev C - 20100226
0.220 (5.59
2
0.850 (21.59)
0.050 (1.27)
0.000
1.050 (26.67)
0.040 dia
(1.02)
12
2.750 (69.85)
1
0.120 (3.05)
0.250 (6.35)
1.250 (31.75)
2.880 (73.15)
3.005 (76.33) max.
1.380 (35.05)
0.400 (10.16) max.
Angled corner
indicates pin one.
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
STANDARD AND /ES (NON-QML) PRODUCTS
ENVIRONMENTAL SCREENING 1
standard
nOn-Qml2
/es
nOn-Qml2
Pre-cap Inspection
Method 2017, 2032
yes
yes
Temperature Cycle (10 times)
Method 1010, Cond. B, -55°C to +125°C, ambient
no
yes
Constant Acceleration
Method 2001, 500 g
no
yes
Burn-in
Method 1015 3
96 hours
no
yes
Final Electrical Test MIL-PRF-38534, Group A
Subgroups 1 and 4: +25°C case
yes
yes
Hermeticity Test
Fine Leak, Method 1014, Cond. A
Gross Leak, Method 1014, Cond. C
Gross Leak, Dip (1 x 10-3)
no
no
yes
yes
yes
no
Final visual inspection
Method 2009
yes
yes
test perFOrmed
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Notes:
1. refers to products that do not offer QMl screening.
2. Standard and /ES, non-QML products, do not meet all of the requirements of MIL-PRF-38534.
3. Burn-in designed to bring the case temperature to the maximum case temperature of the product. Refer to the specific product information
for the maximum case temperature.
FMD28-461 EMI Input Filters, FMD28 Rev C - 20100226. This revision supersedes all previous releases. All technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without notice.
FMD Series EMI Filters are a trademark of Interpoint. Copyright © 1999 - 2010 Interpoint Corporation. All rights reserved. www.interpoint.com
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