Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Features Attenuation 60 dB at 500 kHz, typical • Operating temperature -55° to +125°C • Qualified to MIL-PRF-38534 Class H and K • Passive components used for maximum tolerance in space environments • Nominal 28 V input, 0 V to 50 V operation • Up to 2.7 A throughput current Input Voltage and Current • Compliant to MIL-STD-461C CE-03 • Compatible with MIL-STD-704 B-E 28 VDC power bus Description The SFMC28-461™ EMI filters provide an off-the-shelf filtering solution compliant to MIL-PRF-38534, Class H or Class K, for use in your space system. SFMC28-461 filters reduce the input line reflected ripple current of our switching DC/DC converters. Use an SFMC28-461 filter with our SMTR, SMHF and SMSA series of DC/DC converters to meet MIL-STD-461C levels of conducted emission (CE01, CE03). The SFMC filters are designed exclusively with passive components providing maximum tolerance for space environments. Screening The SFMC28-461 EMI filters offer environmental screening levels to Space Prototype (O), Class H, or Class K requirements. 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) Radiation Hardness Assurance level of MIL-PRF-38534, which is defined as “no RHA”. See Screening Tables 1, 2 and 3 for more information. Ripple Reduction The SFMC28-461 EMI filter, when used with Interpoint’s converters, reduces reflected input ripple current by a minimum of 55 dB at 500 kHz and 60 dB at 1 MHz. The filter and converter combination performance exceeds the CEO3 requirements of MIL-STD-461C. Insertion Loss The maximum DC insertion loss for the SFMC28-461 filter (at a load of 22 watts) represents a power loss of less than 2% at nominal input voltage. Crane Aerospace & Electronics Electronics Group (Interpoint Brand) PO Box 97005 • Redmond WA 98073-9705 425.882.3100 • [email protected] www.interpoint.com Input (V) 28 Current (A) 2.7 Filter Design SFMC28-461 filters incorporate thick-film hybrid technology and use only high quality ceramic capacitors for reliable high temperature operation. All SFMC28-461 filters are built to the same assembly drawing regardless of environmental screening or radiation tolerance level. Filters designated level OO, indicating standard environmental screening, are electrically comparable to filters designated level KH, the highest environmental screening level. This ensures consistency between your prototype or test system using level OO filters and your flight system using filters with higher levels of environmental screening and radiation tolerance. Element evaluation (screening at the component level) of Class H or Class K filters ensures even greater reliability. Refer to Table 1, 2 and 3 for more information. Operating Temperature The filter operates at full load over the temperature range of -55°C to +125°C case. Above +125°C, the current must be derated as specified on page two. Packaging SFMC28-461 EMI filters are encased in high-reliability, hermetically-sealed metal packages and weigh just 48 grams. A small footprint of 2.100 Inches (53.34 mm) by 1.115 inches (28.32 mm) by 0.400 inches (10.16 mm) minimizes the board area needed for the filter. Page 1 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Operating Conditions and characteristics mechanical and environmental Input Voltage Range •0 to 50 VDC continuous Size (maximum) •Non-flanged ‣‣2.100 x 1.115 x 0.400 (53.34 x 28.32 x 10.16 mm) ‣‣See case H1 for dimensions •Flanged ‣‣2.910 x 1.115 x 0.400 inches (73.91 x 28.32 x 10.16 mm) ‣‣See case K2 for dimensions Lead Soldering Temperature (10 sec per pin) •300°C Storage Temperature Range (TC) •65°C to +150°C Case Operating Temperature (TC) •-55°C to +125°C full power Derating Output Power/Current •Derate linearly from 100% at 125°C to 0% at 135°C case Isolation (TC = 25°C) •100 megohm minimum at 500 VDC •Any pin to case, except case pin EMI FILTER +Vin Weight (maximum) •48 grams typical Screening •Space Prototype (O), Class H, or Class K. •Radiation tolerant to Radiation Hardness Assurance (RHA) levels of “-” (O) or “H”, per MIL-STD-38534. Interpoint model numbers use an “O” in the RHA designator position to indicate the “-” (dash) Radiation Hardness Assurance level of MIL-PRF38534, which is defined as “no RHA”. •See Screening Tables 1, 2 and 3 for more information. Available configurations: OO, HH, KH DC/DC CONVERTER +Vout Case Output Input Common Common +Vin +Vout Case Output Input Common Common Multiple units allowed up to rated output current of filter* RL RL Output impedance of the filter must be less than the combined input impedance of the DC/DC converters. Figure 1: Connection Diagram www.interpoint.com Page 2 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Pin PIN OUT Designation 1 Positive Input 3 Case Ground 2 4 5 Positive Output Output Common Input Common Dot on top of package indicates pin one 1 BOTTOM VIEW SFMC NON-FLANGED AND FLANGED 5 2 3 4 Dotted line outlines flanged package option. See cases H1 and K2 for dimensions. Figure 2: Pin Out www.interpoint.com Page 3 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP model numbering key DSCC Numbers DSCC Drawing (5915) Base Model SFMC28 - 461 F / K H MIL-STD-461 compliant Package Option (Non-flanged package has no designator in this position) SFMC28-461 Similar Part 94010H02HXC SFMC28-461/HH 94010H02HZC SFMC28-461F/HH 94010H02HXC SFMC28-461/KH 94010H02HZC SFMC28-461F/KH For exact specifications for a DSCC product, refer to the DSCC drawing. DSCC drawings can be downloaded from: http://www.dscc.dla.mil/programs/smcr Screening Radiation Hardness Assurance (RHA) model selection On the lines below, enter one selection from each category to determine the model number. Category Selection SFMC28-461 Base Model and Input Voltage SFMC28-461 is the only available selection Case Option 1 / _______ Screening 2 RHA 3 (Standard, leave blank) O O F (flanged) H H K Notes: 1. Case Options: For the standard case, case H1, leave the case option blank. For the flanged case option, case K2, insert the letter F in the Case Option position. 2. Screening: A screening level of O is a Space Prototype and is only used with RHA O. See Screening Tables 2 and 3 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) Radiation Hardness Assurance level of MIL-PRF-38534, which is defined as “no RHA.” RHA O is only available with Screening level O. See Screening Table 3 for more information. www.interpoint.com Page 4 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Electrical Characteristics: -55° to +125°C TC, nominal Vin unless otherwise specified. MODEL SFMC28-461 PARAMETER CONDITIONS INPUT VOLTAGE NOISE REJECTION DC RESISTANCE (RDC) OUTPUT VOLTAGE 2 CAPACITANCE OUTPUT CURRENT REFLECTED RIPPLE CURRENT 1 POWER DISSIPATION 1 AT MAXIMUM CURRENT MIN TYP MAX UNITS CONTINUOUS 0 28 50 VDC 500 kHz 55 60 — 1 MHz 60 — — 5 MHz 60 — — 25°C — — 0.2 STEADY STATE VOUT = VIN - IIN (RDC) Ω VDC ANY PIN TO CASE TC = 25°C — — 48,000 pF STEADY STATE — — 2.7 A FROM CONVERTER TO FILTER — — 1.0 ARMS — — 1.5 W Notes 1. Guaranteed by design, not tested. 2.Typical applications result in Vout within 2% of Vin. www.interpoint.com dB Page 5 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified. EMISSION LEVEL (dB µA) 90 CE03 Limit 70 50 30 10 .015 0.1 1 FREQUENCY (MHz) 10 50 DC/DC Converter Typical Worst Case EMI With SFMC-461 Filter Figure 3 ATTENUATION (dB) 5 -15 -35 -55 -75 -95 1K 10K FREQUENCY (MHz) 1M dB OHMS = 20 LOG ZOUT SFMC-461 Typical Amplitude Response vs. Frequency Figure 4 4.8 Ω 10 0 -10 -20 1K 10K 100K FREQUENCY (MHz) 1M Typical Output Impedance (Z) With Input Shorted Figure 5 www.interpoint.com Page 6 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filter Cases 28 Volt input – 2.7 AMP BOTTOM VIEW CASE H1 Seam Seal 0.040 dia (1.02) Squared corner and dot on top of case indicate pin one. 1.115 max. (28.32) 0.955 (24.26) 1 2 3 5 4 1.845 (46.86) 0.155 (3.94) 0.245 (6.22) 0.555 (14.1) Seal hole: 0.120 ±0.002 (3.05 ±0.05) 2.100 max. (53.34) 0.000 0.25 ±0.01 (6.4 ±0.3) 0.000 0.400 max. (10.16) 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, ceramic seal Seal hole 0.120 ±0.002 (3.05 ± 0.05) Case H1 Filters, Rev F, 20100429 Please refer to the numerical dimensions for accuracy. Figure 6: Case H1 www.interpoint.com Page 7 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filter Cases 28 Volt input – 2.7 AMP BOTTOM VIEW CASE K2 Flanged cases: Designator “F” required in Case Option position of model number. Seam Seal 0.040 dia (1.02) Dot on top of case indicates pin one 1.115max. (28.32) 0.955 (24.26) 1 2 x Dia 0.162 ±0.002 (4.11 ±0.05) 2 2 x R 0.170 (4.32) 3 0.555 (14.1) 5 0.155 (3.94) 4 (2.910 max (73.91)) Flange thickness: 0.060 (1.52) 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. Seal Hole: 0.120 ±0.002 (3.04 ±0.05) Case K2 SFMC F, Rev F, 20100506 Figure 7: Case K2 www.interpoint.com Page 8 of 11 SFMC28-461 Rev E - 20100628 2.320 (58.93) 2.090 (53.01) 1.845 (46.86) 0.245 (6.22) 0.000 0.230 (5.84) 0.25 ±0.03 (6.4 ±0.8) 0.000 0.400 max. (10.16) 0.000 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP CLASS H AND K, MIL-PRF-38534 ELEMENT EVALUATION COmpOnent-level test perFOrmed spaCe prOtOtYpe (O) nOn-Qml1 M/S 2 P3 Class h Qml M/S 2 Class K Qml P3 M/S 2 P3 Element Electrical yes no yes yes yes yes Element Visual no no yes yes yes yes Internal Visual no N/A yes N/A yes N/A Temperature Cycling no no no no yes yes Constant Acceleration no no no no yes yes Interim Electrical no N/A no N/A yes N/A Burn-in no N/A no N/A yes N/A Post Burn-in Electrical no N/A no N/A yes N/A Steady State Life no N/A no N/A yes N/A Voltage Conditioning Aging N/A no N/A no N/A yes Visual Inspection no no N/A no N/A yes Final Electrical no no yes yes yes yes SEM no N/A no N/A yes N/A SLAM™/C-SAM: Input capacitors only (Add’l test, not req. by H or K) no no no yes no yes Notes: 1. Non-QML products do not meet all of the requirements of MIL-PRF-38534. 2. M/S = Active components (Microcircuit and Semiconductor Die) 3. P = Passive components Definitions: Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534 SEM: Scanning Electron Microscopy SLAM™: Scanning Laser Acoustic Microscopy C-SAM: C - Mode Scanning Acoustic Microscopy SCREENING TABLE 1: ELEMENT EVALUATION www.interpoint.com Page 9 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP CLASS H AND K, MIL-PRF-38534 ENVIRONMENTAL SCREENING spaCe prOtOtYpe (O) nOn-Qml1 Class h Qml Class K Qml yes yes yes Temperature Cycle (10 times) Method 1010, Cond. C, -65°C to 150°C, ambient yes yes yes Constant Acceleration Method 2001, 3000 g yes yes yes PIND Test Method 2020, Cond. A no yes 2 yes Pre burn-in test yes yes yes Burn-in Method 1015, 125°C case, typical 96 hours 160 hours 2 x 160 hours (includes mid-BI test) yes no no no yes no no no yes Final Electrical Test MIL-PRF-38534 Group A, Subgroups 1 through 6 -55°C, +25°C, +125°C case yes yes yes Radiography Method 2012 N/A N/A yes Post Radiography Electrical Test Room temperature N/A N/A yes 2 Hermeticity Test Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C yes yes yes yes yes yes Final visual inspection Method 2009 yes yes yes end item-level test perFOrmed Pre-cap Inspection Method 2017, 2032 Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. Notes: 1. Space Prototype (O), non-QML products, do not meet all of the requirements of MIL-PRF-38534. 2. Not required by DSCC but performed to assure product quality. SCREENING TABLE 2: ENVIRONMENTAL SCREENING www.interpoint.com Page 10 of 11 SFMC28-461 Rev E - 20100628 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP CLASS H AND K, MIL-PRF-38534 RADIATION HARDNESS ASSURANCE (RHA) ENVIRONMENTAL SCREENING LEVELS RADIATION HARDNESS ASSURANCE LEVELS O 2 SPACE PROTOTYPE (O) NON-QML 1 CLASS H CLASS K QML QML OO N/A N/A N/A HH KH Standard, no radiation guarantee h 3 Radiation tolerant– Tested lots up to 1,000 kRads (Si) total dose, applies to EMI filters only Notes: 1. Space Prototype (O), non-QML, products do not meet all of the requirements of MIL-PRF-38534. 2. Interpoint model numbers use an “O” in the RHA designator position to indicate the “-” (dash) Radiation Hardness Assurance level of MIL-PRF-38534, which is defined as “no RHA” 3. Our EMI filters are designed exclusively with passive components providing maximum tolerance for space environment requirements. SCREENING TABLE 3: RADIATION HARDNESS ASSURANCE SFMC28-461 EMI Filters, SFMC28-461 Rev E - 20100628. 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. SFMC28-461 Series is a trademark of Interpoint. Copyright © 1999 - 2010 Interpoint Corporation. All rights reserved. www.interpoint.com Page 11 of 11