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Crane Aerospace & Electronics Power Solutions
FMD28-461 eMi input Filters
28 Volt input - 7 aMp
Features
* Operating temperature -55 to +125C * Transient rating to 100 V for 100 ms * Up to 7 A throughput current * Compliant to MIL-STD-461C, CE03
attenuation to 50 dB at 500 kHz
* Nominal 28 V input, 0 to 50 V operation
* Compatible with MIL-STD-704 A-E 28 VDC power bus
Description
The FMD28 SeriesTM 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.
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
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.
The FMD28-461 Series filters are rated for full power operation from -55C to +125C case temperature. Current is derated linearly to zero at +135C case temperature.
InseRtIOn lOss packagIng
The maximum dc insertion loss at full load and nominal input voltage represents a power loss of less than 1.3%. FMD28-461 filters are sealed in metal hermetic, down-leaded packages (case J4). Also available in a side-leaded package (case U).
Crane Aerospace & Electronics Electronics Group (Interpoint Brand) POBox97005*RedmondWA98073-9705 425.882.3100*power@crane-eg.com www.interpoint.com
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
input Voltage range *0 to 50 VDC continuous *Transient +100 V for 100 ms
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) Weight (maximum) * Case J4: 55 grams typical *Case U: 77 grams typical
lead soldering temperature (10 sec per lead) *300C storage temperature range (case) *-65C to +150C
case operating temperature (tc) *-55C to +125C full power *-55C to +135C absolute
isolation *100 megohm minimum at 500 VDC
Derating input/output current *Linearly from 100% at 125C to 0% at 135 C
screening FMD28 is offered with 125C Standard and /ES, non-QML screening. See Standard and /ES (non-QML) screening tables for more information on page 8.
EMI FILTER +Vin Case Output Input Common Common +Vout
DC/DC CONVERTER +Vin +Vout RL Case Output Input Common Common
Chassis ground
Multiple units allowed up to rated output current of filter
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 Input
Positive Output
Input Common
Output 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 1 2 3 4 5
Positive Input
Designation
Squared corner and dot on top of package indicate pin one.
Positive Output Case Ground 1 Input Common
Output Common
1
2
BOTTOM VIEW FMD28-461
5
See case J4 for dimensions.
4
3
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.
FIguRe 3: pIn Out FMd28-461
pin out siDe-leaDeD MoDels
pin 1 Designation
1, 2, 3 4, 5, 6 10, 11, 12 -- 7, 8, 9
Positive Input
Angled corner and cover marking indicate pin one. TOP VIEW FMD28-461
Outline shown is case U, pin out is the same for all cases. See cases U, V, W, Y, and Z for dimensions.
Input Common
Output Common Positive Output Case Ground 2
1 2 3 4 5
12 11 10 9 8 7
Notes 1. All pins must be connected. 2. The baseplate is the only case ground connection and should directly contact chassis ground.
6
FIguRe 4: pIn Out FMd28-461sl
www.interpoint.com
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
Base Model Input Voltage FMD 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).
On the lines belOw, enter One selectiOn frOm each categOry
tO determine the mOdel number.
MoDel selection
category
FMD28
Base MoDel anD input Voltage
-461
Mil-stD-461 reFerence
_______
case/leaD option 1 Down-leaded (leave blank) sl (case u, side-leaded)
/
______
screening 2 standard (leave blank) es
selection
"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: 25C TC, nominal Vin, unless otherwise specified.
MODEL
paRaMeteR Input vOltage nOIse ReJectIOn dc ResIstance (Rdc) at MaXIMuM cuRRent 1 capacItance 1 Output vOltage Output cuRRent pOWeR dIssIpatIOn at MaXIMuM cuRRent 1 cOndItIOns tRansIent 100 ms 1, 2 500 khz 1 Mhz tc = 125c tc = 25c cOntInuOus MIN 0 -100 50 45 -- --
FMD28-461
TYP 28 -- 60 55 -- -- 20,000 VOUT = VIN - IIN (RDC) -- -- -- -- -- -- 7 6.0 7.4 MAX 50 1 100 -- -- 0.12 0.15 unIts VDC V dB pF VDC A W
anY pIn tO case steadY state steadY state tc = 25c tc = 125c 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
Crane Aerospace & Electronics Power Solutions
FMD28-461 eMi input Filters - cases
28 Volt input - 7 aMp
BOTTOM VIEW CASE J4
Solder Seal
1.350 max. (34.29) 1.173 (29.79) 0.040 dia. (1.02) 0.673 (17.09) 0.173 (4.39) 0.000
Squared corner and dot on top of case indicate pin one.
1
2
0.162 dia (4.11)
Solder Tip-off
5
4
3
1.370 (34.80)
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 300C 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 (c) 1999-2009 Interpoint Corp. All rights reserved.
FIguRe 5: case J4 - FMd28-461
www.interpoint.com
Page 6 of 8 FMD28 Rev C - 20100226
1.770 (44.96)
2.150 (54.61)
0.000
0.25 (6.4)
0.210 (5.33)
0.000
0.170 (4.32)
0.457 max (11.61)
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.
Angled corner indicates pin one. 1.505 (38.23) max. 1.380 (35.05) 1.250 (31.75) 1.050 (26.67) 0.850 (21.59) 0.650 (16.51) 0.450 (11.43) 0.250 (6.35) 0.120 (3.05) 0.000 0.000
0.23 (5.8) Pin Length
Seam Seal
0.128 dia (3.25). 12 11 10 9 8 7 0.040 dia (1.02)
1 2 3 4 5 6
0.400 (10.16) max.
0.120 (3.05) 0.250 (6.35)
2.750 (69.85)
2.880 (73.15) 3.005 (76.33) max.
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 300C 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 (c) 1999-2010 Interpoint Corp. All rights reserved.
FIguRe 6: case u - FMd28-461sl
www.interpoint.com
Page 7 of 8 FMD28 Rev C - 20100226
0.050 (1.27) 0.000
0.220 (5.59
Crane Aerospace & Electronics Power Solutions
FMD28-461 eMi input Filters
28 Volt input - 7 aMp
STANDARD AND /ES (NON-QML) PRODUCTS ENVIRONMENTAL SCREENING 1
test perFOrmed Pre-cap Inspection Method 2017, 2032 Temperature Cycle (10 times) Method 1010, Cond. B, -55C to +125C, ambient Constant Acceleration Method 2001, 500 g Burn-in Method 1015 3 96 hours Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 and 4: +25C case Hermeticity Test Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) Final visual inspection Method 2009
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.
standard nOn-Qml2
yes no no
/es nOn-Qml2
yes yes yes
no yes no no yes yes
yes yes yes yes no yes
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 (c) 1999 - 2010 Interpoint Corporation. All rights reserved. www.interpoint.com
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