FEATURES • –55°C to +125°C operation • Up to 50 dB attenuation 400 kHz to 50 MHz • Transient suppression • Compliant to MIL-STD-461C, CE03 • Compatible with MIL-STD-704E DC power bus EMI INPUT FILTER 28 VOLT INPUT FMC EMI FILTER 2.7 AMP MODEL FMC-461 FMC-461NT 2.7 Amp 2.7 Amp Size (max): Non-flanged, case H1 2.125 x 1.125 x 0.400 (53.98 x 28.58 x 10.16 mm) Flanged, case K2 2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm) See Section B8, cases H1 and K2, for dimensions. Weight: 48 grams maximum Screening: Standard, ES, or 883 (Class H). See Section C2 for screening options, see Section A5 for ordering information. DESCRIPTION The FMC-461™ EMI filter has been specifically designed to reduce the input line reflected ripple current of Interpoint’s MHF, MTR, MTO, MHV, MHF+, MHD, MTW, MHE, and MLP series of DC/DC converters. It is intended for use in applications which have high frequency switch-mode DC/DC converters and which must meet MIL-STD-461C levels of conducted and radiated noise. TRANSIENT SUPPRESSION The FMC-461 filter also features a fast-reacting (1 pico second) transient suppressor which begins clamping the input voltage at approximately 47 VDC, protecting the DC/DC converter from damage from induced line transients. OPERATING TEMPERATURE The FMC filter is built using thick-film hybrid technology and is hermetically sealed in metal packages for military, aerospace, and other high-reliability applications. The filter uses only ceramic capacitors for reliable high temperature operation. The filter is rated to operate with no degradation of performance over the temperature range of -55°C to +125°C (as measured at the baseplate). Above +125°C, current must be derated as specified on the following page. MIL-STD NOISE MANAGEMENT INSERTION LOSS When used in conjunction with Interpoint converters, the FMC-461 filter reduces input ripple current by 40 dB within the frequency band of 200 kHz to 50 MHz. This gives the filter/converter combination a performance which exceeds the CEO3 test of MIL-STD-461C. Typical FMC-461 filter frequency response and output impedance behavior are shown in Figures 4 and 5. CEO3 performance of a typical converter with the FMC-461 filter connected is shown in Figure 3. The maximum DC insertion loss for the FMC-461 filter (at a load of 22 watts) represents a power loss of less than 2% at typical input voltage. LAYOUT REQUIREMENT The case pin, and ideally the case, should be tied to the case of the converter through a low-inductance connection. B3-13 EMI INPUT FILTERS FMC EMI FILTER 2.7 AMP ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING CONDITIONS TYPICAL CHARACTERISTICS Input Voltage • 0 to 40 VDC continuous Lead Soldering Temperature (10 sec per lead) • 300°C Storage Temperature Range (Case) • –65°C to +150°C Input Voltage Range • 16 to 40 VDC continuous for 40 W load Case Operating Temperature (Tc) • –55°C to +125°C full power Derating • DC input and output current Derate linearly from 100% at 125°C to 0% at 135°C case Capacitance • 0.038 µF max, any pin to case Isolation • 100 megohm minimum at 500 V • Any pin to case, except case pin Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified. PARAMETER INPUT VOLTAGE INPUT CLAMPING VOLTAGE INPUT CURRENT DIFFERENTIAL MODE NOISE REJECTION COMMON MODE NOISE REJECTION DC RESISTANCE (RDC) FMC-461 TYP 28 45.1 47.0 49.5 — — — MAX 40 49.4 49.4 54.2 2.7 — — MIN 0 — — — — 40 50 FMC-461NT1 TYP 28 — — — — — — MAX 40 — — — 2.7 — — UNITS VDC 200 kHz 400 kHz - 50 MHz MIN 0 40.8 44.7 44.7 — 40 50 2 MHz - 50 MHz TC = 25°C 40 — — — — 0.20 40 — — — — 0.20 dB Ω — — — — 1.0 2.7 A rms A — — 1.6 W CONDITIONS CONTINUOUS –55°C 25°C 125°C OUTPUT VOLTAGE2 STEADY STATE OUTPUT CURRENT RIPPLE STEADY STATE — — — — 1.0 2.7 MAXIMUM CURRENT — — 1.6 INTERNAL POWER DISSIPATION VOUT = VIN - IIN (RDC) Notes 1. The FMC-461NT does not have a transorb and does not clamp the input voltage 2. Typical applications result in Vout within 2% of Vin. B3-14 VOUT = VIN - IIN (RDC) VDC A dB VDC FMC EMI FILTER 2.7 AMP EMI INPUT FILTERS 277 IN5649A H 35.6 H Positive Output Positive Input 6 1 6 68 1 F F F 4.7 1 Output Common Input Common 1 3300 pF / 500 V 6800 pF / 500 V (4 times) FMC-461 FMC-461/883 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: SCHEMATIC – TYPICAL VALUES PIN OUT Dot on top of package indicates pin one Pin 1 2 3 4 5 Designation Positive Input Positive Output Case Ground Output Common Input Common 1 2 BOTTOM VIEW FMC NON-FLANGED AND FLANGED 5 3 4 Dotted line outlines flanged package option. See Section B8, cases H1 and K2 for dimensions. FIGURE 2: PIN OUT DSCC NUMBER DSCC DRAWING (5915) MODEL NUMBERING KEY FMC-461 FILTER SIMILAR PART 94010-01HXC FMC-461/883 94010-01HZC FMC-461F/883 94010-02HXC1 FMC-461NT/8831 94010-02HZC1 FMC-461NTF/8831 1. No transorb (NT) Flanged SMDs have the suffix HZC instead of HXC. For exact specifications for a DSCC product, refer to the DSCC drawing. See Section A3, “SMD/DSCC Lists”, for more information. FMC - 461 NT F / 883 Base Model MIL-STD-461 Reference No Transorb Option (Standard FMC-461 has no designator in this position) Case Option (Non-flanged case has no designator in this position) Screening (Standard screening has no designator in this position.) B3-15 FMC EMI FILTER 2.7 AMP EMI INPUT FILTERS Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified. EMISSION LEVEL (dmA) 90 70 50 30 10 .015 0.1 1 50 10 FREQUENCY (MHz) DC/DC Converter Typical Worst Case EMI With FMC-461 Filter FIGURE 3 5 Attenuation (dB) -15 -35 -55 -75 -95 1K 10 K 100 K 1M FREQUENCY (Hz) FMC-461 Typical Amplitude Response vs. Frequency FIGURE 4 dB Ohms = 20 log Zout 10 0 -10 -20 1K 10 K 100 K 1M FREQUENCY (Hz) Typical Output Impedance (Z) With Input Shorted FIGURE 5 B3-16 25621-001-DTS Rev A DQ# 4003 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. FMC-461 is a trademark of Interpoint. Copyright © 1991 - 1999 Interpoint. All rights reserved. CASES Dot on top of case indicates pin one CASE H BOTTOM VIEW See Figures 29 – 34 for pin configurations. 1.125 max (28.58) 2.125 max (53.98) 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. CASE H Materials Header Cold Rolled Steel/Nickel/Gold cases H1 and H2 Cold Rolled Steel/Nickel/Tin cases H3, H4, and H5 Cover Kovar/Nickel cases H1 and H2 Cold Rolled Steel/Nickel/Tin cases H3, H4, and H5 Pins #52 alloy ceramic seal case H1 case H2 (except MHV Series Single and Dual) compression glass seal MHV Series Single and Dual case H3, H4, H5 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 FIGURE 28: CASE H MAXIMUM DIMENSIONS BOTTOM VIEW CASE H1 FMC EMI Filter: Screening – Standard, ES, or 883 SFMC EMI Filter: Screening – Space Standard, H, or K Seam Seal Squared corner and dot on top of case indicate pin one. 0.040 dia (1.02) 1.110 (28.19) 0.955 (24.26) 1 2 3 0.555 (14.1) 5 4 0.155 (3.94) 2.090 (53.01) 1.845 (46.86) 0.245 (6.22) 0.000 0.25 ±0.03 (6.4 ±0.8) 0.000 0.400 max. (10.16) 0.000 FIGURE 29: CASE H1 Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer to the numerical dimensions for accuracy. B8-17 CASE K CASES Dot on top of case indicates pin one CASE K BOTTOM VIEW See Figures 42 - 48 for pin configuration 1.125 max (28.58) 2.910 max (73.91) Flange Thickness: Cases K1, K2, K3 and MLP Series (K5) 0.060 (1.52) Cases K4, K5 (except MLP Series), K6, K7, and K8 0.067 +0.005/-0.007 (1.70 +0.13/-0.8) Materials Header Case K1 - K3 Cold Rolled Steel/Nickel/Gold Cases K4 - K8 Cold Rolled Steel/Nickel/Tin Cover Case K1 - K3 Kovar/Nickel Case K4 - K8 Cold Rolled Steel/Nickel/Tin Pins #52 alloy (all cases) Case K1, K2, and K3 (except MHV Series Single and Dual) ceramic seal Cases K4 - K8 and MHV Series Single and Dual (K3) compression glass seal Case dimensions in inches (mm) Tolerance ±0.005 (0.13) for three decimal places ±0.01 (0.2) 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. FIGURE 41: CASE K MAXIMUM DIMENSIONS B8-26 CASES CASE K BOTTOM VIEW CASE K1 Flanged case FM-704A EMI Filter: Screening – Standard, ES, or 883 Seam Seal 0.040 dia (1.02) Dot on top of case indicates pin one 1.110 (28.19) 0.955 (24.26) 1 2 6 3 5 4 0.162 dia (4.11) 0.555 (14.1) 0.155 (3.94) 2.320 (58.93) 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 FIGURE 42: CASE K1 BOTTOM VIEW CASE K2 Flanged cases: Designator required in Case Option position of model number. FMC EMI Filter: Screening – Standard, ES, or 883 SFMC EMI Filter: Screening – Space Standard, H, or K Seam Seal 0.040 dia (1.02) Dot on top of case indicates pin one 1.110 (28.19) 0.955 (24.26) 1 2 0.162 dia (4.11) 3 0.555 (14.1) 5 4 0.155 (3.94) 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 FIGURE 43: CASE K2 B8-27 QA SCREENING 125°C PRODUCTS 125°C PRODUCTS TEST (125°C Products) STANDARD /ES /883 (Class H)* PRE-CAP INSPECTION Method 2017, 2032 yes yes yes TEMPERATURE CYCLE (10 times) Method 1010, Cond. C, -65°C to 150°C Method 1010, Cond. B, -55°C to 125°C no no no yes yes no CONSTANT ACCELERATION Method 2001, 3000 g Method 2001, 500 g no no no yes yes no BURN-IN Method 1015, 160 hours at 125°C 96 hours at 125°C case (typical) no no no yes yes no FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 through 6: -55°C, +25°C, +125°C Subgroups 1 and 4: +25°C case no yes no yes yes no HERMETICITY TESTING 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 yes yes no FINAL VISUAL INSPECTION Method 2009 yes yes yes Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over the full military temperature range of –55°C to +125°C. Applies to the following products MOR Series MHD Series MFLHP Series MHV Series MFL Series MHF+ Series MHP Series MHF Series** MTR Series MGA Series MQO Series** MSA Series MGH Series MCH Series FM-704A EMI Filter FMD**/FME EMI Filter FMC EMI Filter FMH EMI Filter FMGA EMI Filter FMSA EMI Filter HUM Modules** LCM Modules** LIM Modules **MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer ‘883” screening. C2-10