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 Page 8 of 8