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 www.craneae.com/interpoint 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 www.craneae.com/interpoint 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 www.craneae.com/interpoint 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 www.craneae.com/interpoint 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 www.craneae.com/interpoint 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 www.craneae.com/interpoint 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 www.craneae.com/interpoint 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 Page 8 of 8