FMD28-461 eMi input Filters

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 Interpoint® FMD28 Series™ EMI filters are specifically
designed to reduce the reflected input ripple current of
Interpoint 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.
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. See “Figure 2: Connection Diagram” on page 2.
Input Ripple and EMI
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.
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. See
“Figure 1: FMD28-461 Block Diagram” on page 2
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. FMD28-461
filters reduce input ripple current by a minimum of 50 dB at 500
kHz when used in conjunction with Interpoint dc-dc converters.
Crane Aerospace & Electronics
Power Solutions – Interpoint Products
10301 Willows Road NE, Redmond, WA 98052
+1.425.882.3100 • [email protected]
www.craneae.com/interpoint
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
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, “Figure 6: Case J4 - FMD28-461” on page 6. Also
available in a side-leaded package, “Figure 7: Case U - FMD28461SL” on page 7.
Page 1 of 8
FMD28 Rev AA - 2014.02.06
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
Positive
Input
135 µH
4.1 µH
135 µH
4.1 µH
4.1 µH
Positive
Output
1.3 V
0.1 µF
50 V
6 µF
50 V
10 µF
50 V
Output
Common
Input
Common
0.015 µF
500 V
0.015 µF
500 V
0.015 µF
500 V
Figure 1: FMD28-461 Block Diagram
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
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 2: Connection Diagram
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Page 2 of 8
FMD28 Rev AA - 2014.02.06
RL
RL
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
Pin
FMD28-461
Squared corner and dot on top
of package indicate pin one.
1
Positive Input
3
Output Common
2
Positive Output
4
Case Ground
5
1
BOTTOM VIEW
FMD28-461
1
Input Common
5
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.
1
1, 2, 3
4, 5, 6
7, 8, 9
10, 11, 12
—
Angled corner and cover marking indicate pin one.
Positive Input
Input Common
Output Common
1
12
2
11
3
Positive Output
4
2
Notes
1. All pins must be connected.
2.The baseplate is the only case ground connection and
should directly contact chassis ground. TOP VIEW
FMD28-461
10
9
5
8
6
7
See “Figure 7: Case U - FMD28-461SL” on page 7 for dimensions.
Figure 4: Pin Out FMD28-461SL
Table 2: Pin Out FMD28-461SL
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3
Figure 3: Pin Out FMD28-461
FMD28-461SL
Case Ground
4
See “Figure 6: Case J4 - FMD28-461” on page 6 for dimensions.
Table 1: Pin Out FMD28-461
Pin
2
Page 3 of 8
FMD28 Rev AA - 2014.02.06
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
model numbering key
Base Model
Input Voltage
FMD
28 - 461
SL / ES
MIL-STD-461 Reference
Case Option
(leave blank for down-leaded case, J4)
Screening
(Standard screening has no designator
in this position.)
Figure 5: Model Numbering Key
model Number Options 1
To determine the model number
enter one option from each category in the form below.
Category
Base Model and
Input Voltage
Options
FMD28-461
Fill in for
model #
__________
FMD28-461
Case Option 2
Screening 3
(down-leaded case, J4, leave blank)
Standard (leave blank)
SL (side-leaded case, U)
/ES
/
Notes:
1. See Model Numbering Key above for an example of a model number.
2. Case Options: Leave the case option blank for the standard, down-leaded case, “Figure 6: Case J4 - FMD28-461” on page 6.
Use SL in the case option position for the side-leaded case, “Figure 7: Case U - FMD28-461SL” on page 7.
3. Screening: For standard screening leave the screening option blank. For other screening options, insert the desired screening
level. For more information see “Table 6: Environmental Screening” on page 8.
Table 3: Model Number Options
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Page 4 of 8
FMD28 Rev AA - 2014.02.06
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
Table 4: Operating Conditions 25°C case, 28 VDC in, unless otherwise specified
FMD28-461
PARAMETER
LEAD SOLDERING TEMPERATURE 1
STORAGE TEMPERATURE
CONDITIONS
10 seconds max.
1
MIN
TYP
MAX
UNITS
—
—
300
°C
°C
-65
—
+150
CASE OPERATING
FULL POWER
-55
—
+125
TEMPERATURE 1
ABSOLUTE
-55
—
+135
DERATING OUTPUT POWER/CURRENT 1
LINEARLY
ISOLATION, ANY PIN TO CASE
Except case pin
@ 500 VDC at 25°C
°C
From 100% at 125°C to 0% at 135°C
100
—
—
Megohms
Note
1. Guaranteed by design and/or analysis. Not an in-line test.
Table 5: Electrical Characteristics 25°C case, 28 Vin, unless otherwise specified
FMD28-461
PARAMETER
INPUT VOLTAGE
CONDITIONS
CONTINUOUS
TRANSIENT 100 ms 1, 2
NOISE REJECTION
MIN
TYP
MAX
1
0
28
50
-100
—
100
500 kHz
50
60
—
1 MHz
45
55
—
DC RESISTANCE (RDC)
AT MAXIMUM CURRENT 1
TC = 25°C
—
—
0.12
—
—
0.15
CAPACITANCE 1
ANY PIN TO CASE
OUTPUT VOLTAGE
STEADY STATE
OUTPUT CURRENT
STEADY STATE
—
—
7
POWER DISSIPATION
AT MAXIMUM CURRENT 1
TC = 25°C
—
—
6.0
—
—
7.4
TC = 125°C
TC = 125°C 1
Note
1. Guaranteed by design and/or analysis. Not an in-line test.
2. 0.5 ohm source impedance
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Page 5 of 8
FMD28 Rev AA - 2014.02.06
UNITS
VDC
V
dB
Ω
20,000
pF
VOUT = VIN - IIN (RDC)
VDC
A
W
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
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 x Dia 0.162 ±0.002
(4.11 ±0.05)
2
2 x R 0.170 (4.32)
5
0.173
(4.39)
4
3
1.770 (44.96)
Solder Tip-off
1.370 (34.80)
0.673
(17.09)
(2.720 max (69.09))
Flange Thickness: 0.067 +0.005/-0.007 (1.70 +0.13/-0.8)
Weight: 55 grams typical
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.
Gold plating of 50 - 150 microinches included in pin diameter.
Seal Hole: 0.091 ±0.002 (2.31 ±0.05)
Case J4 FMD, Rev G, 2014.02.05
Please refer to the numerical dimensions for accuracy.
Figure 6: Case J4 - FMD28-461
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Page 6 of 8
FMD28 Rev AA - 2014.02.06
2.150 (54.61)
0.000
0.170 (4.32)
0.210 (5.33)
(0.27 (6.9))
0.000
0.457 max
(11.61)
0.000
Crane Aerospace & Electronics Power Solutions
FMD28-461 EMI Input Filters
28 Volt input – 7 Amp
TOP VIEW CASE U
Flanged case, short-leaded
1.505 (38.23) max.
0.850 (21.59)
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
Weight: 77 grams typical
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 ceramic seal
Gold plating of 50 - 150 microinches is included in pin diameter
Seal Hole: 0.120 ±0.002 (3.05 ±0.05)
Case U, Rev J, 2014.04.06
Please refer to the numerical dimensions for accuracy.
Figure 7: Case U - FMD28-461SL
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Page 7 of 8
FMD28 Rev AA - 2014.02.06
0.220 (5.59
11
0.050 (1.27)
0.000
12
2
2.750 (69.85)
1
1.050 (26.67)
0.120 (3.05)
0.250 (6.35)
1.250 (31.75)
0.040 dia
(1.02)
2.880 (73.15)
3.005 (76.33) max.
1.380 (35.05)
Seam Seal
0.128 dia
(3.25).
0.23 (5.8) Pin Length
0.400 (10.16) max.
Angled corner
indicates pin one.
Crane Aerospace
& Electronics
Solutions
Crane
Aerospace Power
& Electronics
Power Solutions
FMD28-461
EMIand
Input
Filters
Quality
Assurance
Certification
28 Volt input – 7 Amp
APPLICATION NOTE
STandard and /eS (non-Qml) enVironmenTal Screening 1, 2
non-Qml
TeST performed
Pre-cap Inspection
Method 2017, 2032
STandard
/eS
n
n
Temperature Cycle (10 times)
Method 1010, Cond. B, -55°C to +125°C, ambient
n
Constant Acceleration
Method 2001, 500 g
n
Burn-in
Method 1015 3
96 hours
n
Final Electrical Test MIL-PRF-38534, Group A
Subgroups 1 and 4: +25°C case
n
n
Hermeticity Test
Fine Leak, Method 1014, Cond. A
n
Gross Leak, Method 1014, Cond. C
n
Gross Leak, Dip
n
Final visual inspection
Method 2009
n
n
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Notes:
1. “Non-QML” Refers to products that do not offer QML screening.
2. Standard and /ES, non-QML products, may not meet all of the requirements of MIL-PRF-38534.
3. Burn-in temperature 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. Burn-in is a powered test.
Table 6: Environmental Screening
taBle 7: envIROnMental scReenIng–hIgh RelIaBIlIty standaRd and /es, nOn-QMl
FMD28-461 EMI Input Filters, FMD28 Rev AA - 2014.02.06. This revision supersedes
all previous
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Page 11
of 13 releases. All technical information is believed to be
accurate, but no responsibility is assumed for errors or omissions. Crane Electronics, Inc. reserves the right to make changes in products or speciAPP-009
AB
- 2014.01.28
fications without notice. Interpoint is a registered trademark of Crane
Co. and Rev
FMD28
Series
is a trademark of Crane Electronics, Inc. Copyright ©
1999 - 2014 Crane Electronics, Inc. All rights reserved. www.craneae.com/interpoint
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