sFMe28-461 eMi input Filters

Crane Aerospace & Electronics Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
Features
• Radiation tolerant space EMI filter
Total ionizing dose (TID) guaranteed per MIL-STD-883
method 1019, radiation hardness assurance (RHA)
H, 1000 krad(Si)
Passive components used for maximum tolerance
in space environments
• Attenuation 70 dB at 500 kHz and 1 MHz, typical
• Operating temperature -55° to +125°C
• Qualified to MIL-PRF-38534 Class H and
• Nominal 28 V input, 0 V to 50 V operation
• Up to 10 A throughput current
• Compliant to MIL-STD-461C CE-03
Input Voltage
and Current
• Compatible with MIL-STD-704 A-E 28 VDC power bus
Input (V)
28
Description
The SFME28-461™ Series EMI filter modules are specifically
designed to reduce the reflected input ripple current of high
frequency dc-dc converters. SFME28-461 filters minimize
electromagnetic interference (EMI) for Interpoint® space
converters. These filters are intended for use in 28 volt
applications which must meet MIL-STD-461 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 most 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-461, a power line filter is needed. These EMI power line
filters reduce the common mode and differential noise generated
by the converters. The SFME28-461 filters reduce input ripple
current by a minimum of 60 dB at 500 kHz and 1 MHz when
used in conjunction with Interpoint dc-dc converters.
Crane Aerospace & Electronics
Power Solutions – Interpoint Products
10301 Willows Rd. NE, Redmond, WA 98052
+1 425-882-3100 • [email protected]
www.craneae.com/interpoint
Current (A)
10
The filter must be placed 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. For the best connection, mount the filter’s
and converter’s baseplates on or above a small ground plane.
Operation over Temperature
All SFME28-461 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 4%.
Radiation Hardness Assurance (RHA)
SFME28-461 is built with passive components to ensure
maximum tolerance in space environments. RHA level H is
guaranteed to 1000 krad(Si).
Screening
The SFME28-461 filter offers three screening options: Space
Prototype (O), Class H, or Class K. Radiation tolerant to
Radiation Hardness Assurance (RHA) levels of “-” (O) or “H”,
per MIL-PRF-38534. Interpoint model numbers use an “O” in the
RHA designator position to indicate the “-” (dash) RHA level of
MIL-PRF-38534, which is defined as “no RHA”. See Table 7 on
page 8.
Page 1 of 8
SFME Rev AA - 2015.08.17
Crane Aerospace & Electronics Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
Positive
Output
Positive
Input
T1
T2
Output
Common
Input
Common
SFME28-461
Figure 1: Schematic
EMI FILTER
+Vin
DC/DC CONVERTER
+Vout
+Vin
+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 2: Connection Diagram
Angled corner indicates pin one.
PIN OUT (all Cases)
Pin 1
Designation
1, 2, 3
Positive Input
4, 5, 6
Input Common
7, 8, 9
Output Common
10, 11, 12
Positive Output
—
1
2
3
4
5
Case Ground 2
Page 2 of 8
SFME Rev AA - 2015.08.17
10
9
8
7
Figure 3: Pin Out
Table 1: Pin Out
12
11
Outline shown is standard case U, flanged,
short leads. See Figure 5 on page 5.
for dimensions. Case V is also available,
flanged, leads bent down. See Figure 6 on
page 6 for dimensions.
6
Notes
1. All pins must be connected.
2. The baseplate is the only case ground connection and should directly contact chassis ground. www.craneae.com/interpoint
TOP VIEW
(Pin side, marked side)
Crane Aerospace & Electronics Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
model numbering key
Base Model
MIL-STD-461 Compliant
SFME28 - 461
V / K
DLA Drawings
H
Case/Lead Option
(leave blank for standard case U)
Screening
DLA Drawing (5915)
Vendor Similar Part
-95004H03HUc
SFME28-461V/HH
-95004H03KUC
SFME28-461V/KH
-95004H03Hxc
SFME28-461/HH
-95004H03KXC
SFME28-461/KH
The long-leaded “leads bent down” case in the DLA Drawing is “U”
(-95004H03HUC) and the corresponding vendor similar part number
is SFME28-461V/HH. The “standard” short-leaded case in the DLA
Drawing is “X” (-95004H03HXC) and the corresponding vendor
similar part number is SFME28-461/HH (no case designator). For
exact specifications for a DLA Drawing product, refer to the DLA
drawing. The DLA Drawings can be downloaded from
www.landandmaritime.dla.mil/programs/smcr
Radiation Hardness
Assurance (RHA)
Figure 4: Model Numbering Key
Table 2: DLA Drawings
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
SFME28-461
Fill in for
Model #
__________
SFME28-461
Case Option 2
Screening 3
RHA 4
(standard, leave blank)
O
O
V (leads bent down)
H
H
K
/
_______
Notes
1. See Figure 4, above, for an example of a model number.
2. Case Options: Case U is the standard case (Figure 5 on page 5), leave the case option blank for case U. For
case V (Figure 6 on page 6), place a “V” in the case option position.
Note:
-DLA Drawing number -9500403HUC specifies DLA case U which is the vendor case “V” (SFME28-461V/HH). DLA
case U, vendor case V, is the long down-leaded option, shown in Figure 6 on page 6.
-DLA Drawing number -9500403HXC specifies DLA case X which is the vendor standard and is not included in the
vendor model number (SFME28-461/HH). DLA case X and vendor standard case is the short-leaded option shown in
Figure 5 on page 5.
3. Screening: A screening level of O is a Space Prototype and is only used with RHA O. See Table 6 on page 7 and
Table 7 on page 8 for more information. “H” indicates Class H and “K” indicates Class K of MIL-PRF-38534.
4. RHA: Interpoint model numbers use an “O” in the RHA designator position to indicate the “-” (dash) RHA level of
MIL-PRF-38534, which is defined as “no RHA.” RHA O is only available with Screening level O.
See Table 7 on page 8.
Table 3: Model Number Options
www.craneae.com/interpoint
Page 3 of 8
SFME Rev AA - 2015.08.17
Crane Aerospace & Electronics Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
Table 4: Operating Conditions
SFME28-461
PARAMETER
LEAD SOLDERING TEMPERATURE 1
CONDITIONS
10 seconds max.
STORAGE TEMPERATURE 1
MIN
TYP
MAX
UNITS
—
—
300
°C
°C
-65
—
+150
CASE OPERATING
FULL POWER
-55
—
+125
TEMPERATURE
ABSOLUTE 1
-55
—
+135
DERATING OUTPUT POWER/CURRENT 1
LINEARLY
ISOLATION, ANY PIN TO CASE
@ 500 VDC at 25°C
°C
From 100% at 125°C to 0% at 135°C
100
—
—
Megohms
Table 5: Electrical Characteristics: -55 to +125°C case, unless otherwise specified.
SFME28-461
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT VOLTAGE
continuous
0
28
50
V
InPUT CURRENT 1
-0.5
—
100
V
STEADY STATE
—
—
10
A
NOISE REJECTION
500 kHz
60
70
—
1 MHz
60
70
—
TC = 25°C
—
—
0.07
Ω
70
µF
DC RESISTANCE (RDC)
Capacitance
OUTPUT VOLTAGE
POWER DISSIPATION 1
AT MAXIMUM CURRENT
TRANSIENT 100 ms 1, 2
ANY PIN TO CASE
TC = 25°C
STEADY STATE
TC = 25°C
50
VOUT = VIN - IIN(RDC)
—
—
Notes
1. Guaranteed by test or analysis. Not an inline test.
2. 0.5 ohm source impedance. Transients up to 100 volts will not damage the filter
but will be passed through the filter.
www.craneae.com/interpoint
Page 4 of 8
SFME Rev AA - 2015.08.17
7.0
dB
V
W
Crane Aerospace & Electronics Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
TOP VIEW CASE U
Flanged case, short leads
Case “U” does not require a designator in the Case Option position of the model number.
1.505 (38.23) max.
2
11
0.850 (21.59)
3
10
0.650 (16.51)
4
9
0.450 (11.43)
5
8
0.250 (6.35)
6
7
2.750 (69.85)
0.000
0.120 (3.05)
0.000
Weight: 86 grams maximum
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 K, 2014.03.03
Please refer to the numerical dimensions for accuracy.
Figure 5: Case U
www.craneae.com/interpoint
Page 5 of 8
SFME Rev AA - 2015.08.17
0.220 (5.59
1.050 (26.67)
0.040 dia
(1.02)
12
0.050 (1.27)
0.000
1
0.120 (3.05)
0.250 ±0.010
(6.35 ±0.3)
1.250 (31.75)
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 Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
TOP VIEW CASE V
Flanged case, down leaded
Case “V” requires a “V” in the Case Option position of the model number.
Maximum dimensions: 3.005 x 1.505 (76.33 x 38.23 mm)
Angled corner
indicates pin one.
(3.45 (87.6))
lead center to lead center
1.380 (35.05)
11
2
1.050 (26.67)
0.850 (21.59)
3
0.650 (16.51)
4
0.450 (11.43)
10
9
8
5
0.250 (6.35)
7
6
0.120 (3.05)
Seam Seal
0.040 dia
(1.02)
12
1
1.250 (31.75)
0.128 dia
(3.25)
Weight: 86 grams maximum
0.150 (3.81)
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
0.050 (1.27)
0.000
0.220 (5.59)
Lead Detail
0.400 (10.16) max.
0.220 (5.59)
0.000
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
OFHC copper/gold, compresssion glass seal
Gold plating of 50 - 150 microinches is included in pin diameter
Seal Hole: 0.120 ±0.002 (3.05 ±0.05)
Case V, Rev H, 2014.03.06
Please refer to the numerical dimensions for accuracy.
Figure 6: Case V
www.craneae.com/interpoint
0.400 (10.16) max
2.880 (73.15)
3.005 (76.33) max
2.750 (69.85)
0.250 ±0.010
(6.35 ±0.3)
0.000
0.120 (3.05)
ref: 0.225 (5.72
0.000
Page 6 of 8
SFME Rev AA - 2015.08.17
(0.250 ±0.05
(6.35 ±1.27))
0.050 typical
inner radius
(2.80 (71.1))
(lead center to lead center)
Crane Aerospace & Electronics Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
Table is for reference only. See individual Series' datasheets for specific screening.
ELEMENT EVALUATION SPACE EMI FILTERS
PROTOTYPE, CLASS H AND CLASS K
NON-QML 1
QML
PROTOTYPE
CLASS H
CLASS K
/O
/H
/K
COMPONENT-LEVEL TEST PERFORMED
Element Electrical
n
Visual
P2
P2
n
n
n
n
Temperature Cycling
n
Constant Acceleration
n
Voltage Conditioning Aging
n
Visual Inspection
n
Final Electrical
n
n
Notes
1. Non-QML products may not meet all of the requirements of MIL-PRF-38534.
2. P = Passive components, Class H and K element evaluation.
Definitions:
Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534
Table 6: Element Evaluation
www.craneae.com/interpoint
Page 7 of 8
SFME Rev AA - 2015.08.17
Crane Aerospace & Electronics Power Solutions
SFME28-461 EMI Input Filters
28 Volt Input – 10 Amp
Table is for reference only. See individual Series' datasheets for specific screening.
ENVIRONMENTAL SCREENING SPACE EMI FILTERS
PROTOTYPE, CLASS H AND CLASS K, MIL-PRF-38534 AND RHA1
NON-QMl 2
PROTOTYPE 4
CLASS H
CLASS K
n
n
n
n
n
n
n
n
/OO 5
TEST PERFORMED
QML 3
pre-cap inspection, Method 2017, 2032
/HH 5
/KH 5
temperature cycle (10 times) (Qual 100 times)
Method 1010, Cond. C, -65°C to +150°C, ambient
constant acceleration
Method 2001, 3000 g (Qual 5000 g)
pinD, test Method 2020, cond. a
n
pre burn-in test, group a, subgroups 1 and 4
n
n
6
n
n
n
burn-in Method 1015, +125°c case, typical 7
96 hours
n
160 hours
n
2 x 160 hours (includes mid-BI test)
n
Final electrical test, Mil-prF-38534, group a,
Subgroups 1 and 4: +25°C case
n
Subgroups 1 through 6, -55°C, +25°C, +125°C case
n
n
Hermeticity test, Method 1014
Gross Leak, Cond. B2, Kr85
Gross Leak, Cond. C1, fluorocarbon
n
n
Fine Leak, Cond. B1, Kr85
Fine Leak, Cond. A2, helium
n
n
n
n
radiography, Method 2012
n
post radiography electrical test, +25°c case
n6
Final visual inspection, Method 2009
n
radiation tolerant 1
Tested lots up to 1,000 krad(Si) total dose
n
n
n
n
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Notes
1. Our Redmond facility has a DLA approved RHA plan for Interpoint power
products.
2. Non-QML products may not meet all of the requirements of
MIL-PRF-38534.
3. All processes are QML qualified and performed by certified operators.
4. “O” in the RHA designator position in Interpoint model numbers indicates
DLA RHA “-” defined as no RHA.
5. Our EMI filters are designed exclusively with passive components
providing maximum tolerance for space environment requirements.
6. Not required by DLA but performed to assure product quality.
7. Burn-in temperature designed to bring the case temperature to +125°C
minimum. Burn-in is a powered test.
Table 7: Environmental Screening and RHA Levels
SFME EMI Input Filters, SFME Rev AA - 2015.08.17. This revision supersedes all previous 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
specifications without notice. Interpoint is a registered trademark of Crane Co. and the SFME28-461 is a trademark of Crane Electronics, Inc.
Copyright Copyright © 1999 - 2015 Crane Electronics, Inc. All rights reserved. www.craneae.com/interpoint
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