Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Features • Fully qualified to Class H or K • Passive components used for maximum tolerance in space environments • -55°C to +125°C operation • Nominal 28 V input, 0 V to 50 V operation • Up to 2.7 A throughput current • 60 dB attenuation typical at 500KHz Input Voltage and Current • Compliant to MIL-STD-461C CE-03 • Compatible with MIL-STD-704 A-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-STD-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 “Class H and K, MIL-PRF-38534 Screening” tables 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%. Input (V) 28 Derating according to the requirements of MIL-STD-975 assures dependable performance in the harsh environments of space. Compliance to MIL-STD-975 derating is achieved at or below case operating temperatures of 90°C. 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 for Space SFMC28-461 EMI filters are encased in high-reliability, hermetically-sealed metal packages and weigh just 48 grams. A small footprint of 2.110 Inches (53.59 mm) by 1.115 inches (28.32 mm) by 0.400 inches (10.16 mm) minimizes the board area needed for the filter. Cover marking inks are NASA approved to Total Mass Loss (TML) and Collected Volatile Condensable Material (CVCM) outgassing requirements for operation in space environments. Filter Design SFMC28-461 filters incorporate thick-film hybrid technology and use only high quality ceramic capacitors for reliable high temperature operation. Crane Aerospace & Electronics Electronics Group (Interpoint Brand) PO Box 97005 • Redmond WA 98073-9705 425.882.3100 • [email protected] www.craneae.com Current (A) 2.7 Page of 11 Rev D - 20070404 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Operating Conditions and characteristics Input Voltage Range •0 to 50 VDC continuous Lead Soldering Temperature (10 sec per pin) •300°C Storage Temperature Range (Case) •-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 Input to Output Capacitance •0.048 µF max., any pin to case Isolation •100 megohm minimum at 500 VDC •Any pin to case, except case pin mechanical and environmental Size (maximum) Non-flanged 2.125 x 1.125 x 0.400 (53.98 x 28.58 x 10.16 mm) See case H1 for dimensions. Flanged 2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm) See case K2 for dimensions. 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-PRF-38534, which is defined as “no RHA”. See “Class H and K, MIL-PRF-38534 Screening” tables for more information. Available configurations: OO, HH, KH EMI FILTER +Vin 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.craneae.com Page of 11 Rev D - 20070404 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP PIN OUT Pin 1 2 3 4 5 Designation Positive Input Positive Output Case Ground Output Common Input Common Dot on top of package indicates pin one 1 2 BOTTOM VIEW SFMC NON-FLANGED AND FLANGED 5 3 4 Dotted line outlines flanged package option. See cases H1 and K2 for dimensions. Figure 2: Pin Out www.craneae.com Page of 11 Rev D - 20070404 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP model numbering key Base Model SFMC28 - 461 dscc number F / KH MIL-STD-461 compliant Package Option (Non-flanged package has no designator in this position) Screening DSCC Drawing (5915) SFMC28-461 Filter Similar Part 94010H02HXC 94010H02HXC 94010H02KXC 94010H02KZC SFMC28-461/HH SFMC28-461f/HH SFMC28-461/KH SFMC28-461/KH Flanged SMDs have the suffix HZC in place of HXC. Interpoint’s DSCC drawing models are similar in perfo mance and dimensions to standard models, however, slight differences in specifications may exist. Refer to the DSCC drawing for the exact specifications. DSCC drawings can be downloaded from: http://www.dscccols.com/programs/smcr Model Selection SFMC28- Base model 461 MIL-STD-461 compliant case option / screening Choose one from each of the following rows: Case option Screening non-flanged, leave blank OO* - Space prototype, HH, KH F - flanged *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” www.craneae.com Page of 11 Rev D - 20070404 Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified. sfmc28-461 PARAMETER CONDITIONS MIN TYP INPUT VOLTAGE CONTINUOUS 0 28 50 VDC — — 2.7 A INPUT CURRENT NOISE REJECTION DC RESISTANCE (RDC) 500 kHz 55 — — 1 MHz 60 — — 5 MHz 60 TC = 25°C — — — UNITS dB — 0.20 V OUTPUT VOLTAGE1 STEADY STATE OUTPUT CURRENT STEADY STATE — REFLECTED RIPPLE CURRENT FROM CONVERTER TO FILTER — — 1.0 A — — 1.5 W POWER DISSIPATION AT MAXIMUM CURRENT VOUT = VIN - IIN(RDC) — 2.7 Notes 1.Typical applications result in Vout within 2% of Vin. www.craneae.com MAX Page of 11 Rev D - 20070404 VDC A 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 �A) 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 � 10 0 -10 -20 1K 10K 100K FREQUENCY (MHz) Typical Output Impedance (Z) With Input Shorted Figure 5 www.craneae.com Page of 11 Rev D - 20070404 1M 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. 1.110 max. (28.19) 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) 2.090 max. (53.01) 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 Case H1, Rev C, 20060110 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 © 1999-2006 Interpoint Corp. All rights reserved. Figure 6: Case H1 www.craneae.com Page of 11 Rev D - 20070404 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 1.110 max. (28.19) 0.955 (24.26) 1 2 0.162 dia (4.11) 3 5 4 1.845 (46.86) 0.155 (3.94) 0.245 (6.22) 0.555 (14.1) 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 Case K2, Rev C, 20060110 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 © 1999-2006 Interpoint Corp. All rights reserved. Figure 7: Case K1 www.craneae.com Page of 11 Rev D - 20070404 2.320 (58.93) 2.910 max. (73.91) Seal hole: 0.120 ±0.002 (3.05 ±0.05) 2.090 (53.01) 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 Space Test PerformedPrototype OClass HClass K non-QML1 QML QML (component level)M/S2P3M/S2P3M/S2P3 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 Wire Bond Evaluation4 no no yes yes yes yes no no yes yes yes yes SEM SLAM™/C-SAM: Input capacitors only (Add’l test, not req. by H or K) no N/A no N/A yes N/A no no yes no yes no 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 4. Not applicable to EMI filters that have no wirebonds. 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 www.craneae.com Page of 11 Rev D - 20070404 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 Test Performed Space Prototype O (end item level) non-QML1 2 Non-destruct bond pull Method 2023 no Pre-cap Inspection Method 2017, 2032 yes Temperature Cycle (10 times) Method 1010, Cond. C, -65°C to 150°C, ambient yes Constant Acceleration Method 2001, 3000 g yes PIND Test Method 2020, Cond. A no Pre burn-in test yes Burn-in Method 1015, 125°C case, typical 96 hours yes 160 hours no 2 x 160 hour (includes mid BI test) no Final electrical test MIL-PRF-38534 Group A, Subgroups 1 through 6 -55°C, +25°C, +125°C case yes Radiography Method 2012 N/A Post Radiography Electrical Test Room temperature N/A Hermeticity test Fine Leak, Method 1014, Cond. A yes Gross Leak, Method 1014, Cond. C yes Final visual inspection Method 2009 yes 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 applicable to EMI filters that have no wirebonds. 3. Not required by DSCC but performed to assure product quality. www.craneae.com Page 10 of 11 Rev D - 20070404 Class H, QML Class K, QML yes3 yes yes yes yes yes yes yes yes3 yes yes yes no yes no no no yes yes yes N/A yes N/A yes3 yes yes yes yes yes yes Crane Aerospace & Electronics Power Solutions SFMC28-461 EMI Input Filters 28 Volt input – 2.7 AMP Class H and K, MIL-PRF-38534 Radiation Assurance Product Level AvailabilityEnvironmental Screening Levels space Prototype OClass H Class K Radiation Hardness non-QML3 QML QML Assurance Levels O2: Standard, no radiation guarantee OO HO N/A H1, 5: Radiation tolerant – Tested lots Up to 1,000 K Rads (Si) total dose N/A HH4 KH4 Notes: 1. Our EMI filters are designed exclusively with passive components providing maximum tolerance for space environment requirements. 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. Space Prototype (O), non-QML products, do not meet all of the requirements of MIL-PRF-38534. 4. Redmond site, Interpoint, has a Radiation Hardness assurance plan on file with DSCC. Our SMD products with RHA "H" code meet DSCC requirements. 5. Space filters are only available with Radiation Hardness Assurance (RHA) levels of “O” and “H”. SFMC EMI Filters, Rev D - 20070404. This revision supercedes 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. SFMC Series is a trademark of Interpoint. Copyright © 1999 - 2007 Interpoint Corporation. All rights reserved. www.craneae.com Page 11 of 11