FEATURES • –55°C to +125°C operation • 50 dB minimum attenuation at 500 kHz • Compliant to MIL-STD-461C, CE03 • Compatible with MIL-STD-704E DC power bus EMI INPUT FILTER 28 VOLT INPUT FMH EMI FILTER 1.5 AMP MODEL FMH-461 1.5 amp Size (max.): Non-flanged, case E3 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm) Flanged, case G3 2.005 x 1.130 x 0.330 inches (50.93 x 28.70 x 8.38 mm) See Section B8, cases E3 and G3, for dimensions. Weight: 22 grams typical, 28 grams maximum Screening: Standard, ES, or 883 (Class H). See Section C2 for screening options, see Section A5 for ordering information. DESCRIPTION Interpoint specifically designed the FMH-461™ EMI filter to reduce the input line reflected ripple current of the following high frequency DC/DC converters: MHD, MHF, MHF+, MHV, MSA1, and MTR series converters. It will also reduce EMI for several of Interpoint’s lower frequency converters: MHE/MLP, MHL, MTO, and MTW series. The FMH-461 filter is ideal for use in applications which must meet MIL-STD-461C levels of conducted and radiated emissions. Throughput current is 1.5 amps. At 16 VDC input (low line), the filter provides 24 watts of throughput power. MIL-STD NOISE MANAGEMENT When used in conjunction with Interpoint converters, the FMH-461 EMI filter reduces input ripple current by 35 dB or greater at 200 kHz and by at least 50 dB at 500 kHz (see Figures 5 and 6 and electrical characteristics table). This attenuation gives the converter/filter combination performance which exceeds MIL-STD-461C’s CE03 test. FILTER OPERATION FMH-461 filters are rated for full power operation from –55°C to +125°C baseplate temperature. Operation is offered up to the absolute maximum of +135°C with derating as defined in “Recommended Operating Conditions” on the following page. The maximum DC insertion loss at full load and nominal input voltage (28 VDC) represents a power loss of less than 2%. LAYOUT REQUIREMENTS The case of the filter must be connected to the case of the converter through a low impedance connection to minimize EMI. 1. MSA models may require an inductor in series with the MSA’s positive input. 2 µH is the suggested value. B3-17 EMI INPUT FILTERS FMH EMI FILTER 1.5 AMP TYPICAL CHARACTERISTICS RECOMMENDED OPERATING CONDITIONS ABSOLUTE MAXIMUM RATINGS 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 Capacitance • 0.024 µF max, any pin to case Isolation • 100 megohm minimum at 500 V • Any pin to case, except case pin Input Voltage Range • 16 to 40 VDC continuous Case Operating Temperature (Tc) • –55°C to +125°C full power Derating DC Input/Output current • Derate linearly from 100% at 125°C to 0% at 135°C case Electrical Characteristics: 25°C Tc, nominal Vin, unless otherwise specified. PARAMETER INPUT VOLTAGE INPUT CURRENT NOISE REJECTION CONDITIONS CONTINUOUS 200 kHz 500 kHz TC = 25°C DC RESISTANCE (RDC) FMH-461 TYP 28 — 40 60 0.20 MIN 0 — 35 50 — MAX 40 1.5 — — 0.35 UNITS VDC A dB Ω OUTPUT VOLTAGE1 STEADY STATE OUTPUT CURRENT RIPPLE STEADY STATE — — — — 0.3 1.5 A rms A MAXIMUM CURRENT — 0.5 0.8 W INTERNAL POWER DISSIPATION VOUT = VIN - IIN (RDC) VDC Notes 1. Typical applications result in Vout within 2% of Vin. 590 30 H H Positive Output Positive Input 5.1 34 2 F 1 F Output Common Input Common 1 3300 pF 500V FMH-461 FIGURE 1: SCHEMATIC B3-18 F 2 F 6800 pF 500 V FMH EMI FILTER 1.5 AMP EMI INPUT FILTERS EMI FILTER +Vin DC/DC CONVERTER +Vout +Vin +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 2: CONNECTION DIAGRAM PIN OUT Dot on top of cover indicates pin one. Pin 1 2 3 4 5 Designation Positive Input Positive Output Case Ground Output Common Input Common 1 2 BOTTOM VIEW FMH NON-FLANGED 3 AND FLANGED 5 4 Dotted line outlines flanged package option. See Section B8, cases E3 and G3 for dimensions. FIGURE 3: PIN OUT DSCC NUMBER DSCC DRAWING (5915) 95003-01HXC 95003-01HZC MODEL NUMBERING KEY FMH-461 FILTER SIMILAR PART FMH-461/883 FMH-461F/883 For exact specifications for a DSCC product, refer to the DSCC drawing. See Section A3, “SMD/DSCC Lists”, for more information. FMH - 461 F / 883 Base Model MIL-STD-461 Reference Case Option (Non-flanged case has no designator in this position) Screening (Standard screening has no designator in this position.) B3-19 FMH EMI FILTER 1.5 AMP EMI INPUT FILTERS Typical Performance Curves: 25°C Tc , nominal Vin, unless otherwise specified. 90 A) 70 EMISSION LEVEL (dB 80 60 CE 03 LI M IT 50 40 30 20 10 0 .015 0.1 1 10 50 FREQUENCY (MHz) MHF+2805S Converter Without Filter FIGURE 4 90 EMISSION LEVEL (dB A) 80 CE 03 70 LI M 60 IT 50 40 30 20 10 0 .015 0.1 1 10 50 FREQUENCY (MHz) MHF+2805S Converter With FMH-461 Filter FIGURE 5 dB OHMS = 20 LOG ZOUT 20 10 0 -10 -20 1K 100 K 10 K FREQUENCY (Hz) 1M Typical Output Impedance (Z) With Input Shorted FMH-461 FIGURE 6 B3-20 26421-001-DTS Rev A DQ# 4044 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. FMH-461 is a trademark of Interpoint. Copyright © 1992 - 1999 Interpoint. All rights reserved. CASES Squared corner and dot on top of case indicate pin one. CASE G BOTTOM VIEW Flanged package See Figures 25 - 27 for pin configuration CASE G Materials Header Cold Rolled Steel/Nickel/Gold Cover MHF+ Series and FMH Filter Kovar/Nickel SMHF Cold Rolled Steel/Nickel Pins #52 alloy (all cases) compression glass seal 1.130 max (28.70) 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 2.005 max (50.93) 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. Flange Thickness: 0.047 (1.19) FIGURE 24: CASE G MAXIMUM DIMENSIONS BOTTOM VIEW CASE G1 Flanged cases: Designator "F" required in Case Option position of model number MHF+ Series Single and Dual, LIM5050 Module: Screening – Standard, ES, or 883 SMHF Series, SLIM5050 Module: Screening – Space Standard, H, or K Projection Weld Squared corner and dot on top of case indicate pin one. 0.960 (24.38) 1 4 5 0.128 dia (3.25) 1.590 (40.39) 1.105 (28.07) 6 0.905 (22.99) 0.000 7 0.705 (17.91) 8 0.140 (3.56) 0.25 (6.35) 0.000 0.25 (6.35) 0.330 max. (8.38) 0.000 3 0.560 (14.22) 0.160 (4.06) 0.000 0.330 max. (8.38) 2 0.505 (12.83) 0.030 dia. (0.76) 0.205 (5.21) Seam Seal FIGURE 25: CASE G1 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. B8-15 CASES CASE G BOTTOM VIEW CASE G2 Flanged case: Designator required in Case Option position of model number. MHF+ Series Triple: Screening – Standard, ES, or 883 Projection Weld Squared corner and dot on top of case indicate pin one. 0.960 (24.38) 1 4 5 0.128 dia (3.25) 6 1.590 (40.39) 7 1.105 (28.07) 0.205 (5.21) 0.000 8 0.905 (22.99) 9 0.140 (3.56) 0.25 (6.35) 0.000 0.330 max. (8.38) 0.25 (6.35) 0.000 3 0.560 (14.22) 0.160 (4.06) 0.000 0.330 max. (8.38) 2 0.705 (17.91) 0.030 dia. (0.76) 0.505 (12.83) Seam Seal FIGURE 26: CASE G2 BOTTOM VIEW CASE G3 Flanged case: Designator required in Case Option position of model number. FMH EMI Filter: Screening – Standard, ES, or 883 Squared corner and dot on top of case indicate pin one. Projection Weld 0.030 dia. (0.76) 0.960 (24.38) 1 0.128 dia (3.25) 0.560 (14.22) 4 1.205 (30.61) 0.000 0.140 (3.56) 0.25 (6.35) 0.000 0.330 max. (8.38) 0.25 (6.35) 0.000 0.330 max. (8.38) 5 0.205 (5.21) 3 0.160 (4.06) 0.000 FIGURE 27: CASE G3 B8-16 2 1.590 (40.39) Seam Seal CASES CASE E Squared corner and dot on top of case indicate pin one. CASE E BOTTOM VIEW See Figures 16 – 18 for pin configurations. 1.130 max (28.70) Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel (SMHF Series Cold Rolled Steel/Nickel/Gold) Pins #52 alloy/Gold compression glass seal 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 1.460 max (37.08) 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 15: CASE E MAXIMUM DIMENSIONS BOTTOM VIEW CASE E1 MHF+ Series Single and Dual: Screening – Standard, ES, or 883 MHF Series and LIM5050 Module: Screening – Standard or ES SMHF Series Single and Dual and SLIM5050 Module: Screening – Space Standard, H, or K HR120 Series: No screening options Seam Seal Projection Weld Squared corner and dot on top of case indicate pin one. 0.960 (24.38) 1 2 3 4 5 0.030 dia. (0.76) 0.205 (5.21) 0.000 0.25 (6.35) 0.000 0.330 max (8.38) 0.25 (6.35) 0.000 0.330 max (8.38) 7 6 0.505 (12.83) 0.705 (17.91) 0.905 (22.99) 1.105 (28.07) 8 0.160 (4.06) 0.000 FIGURE 16: CASE E1 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. B8-10 CASES CASE E BOTTOM VIEW CASE E2 MHF+ Series Triple: Screening – Standard, ES, or 883 Projection Weld Seam Seal Squared corner and dot on top of case indicate pin one. 0.960 (24.38) 1 2 3 4 5 8 7 6 9 0.205 (5.21) 0.000 0.25 (6.35) 0.000 0.330 max (8.38) 0.25 (6.35) 0.000 0.330 max (8.38) 0.160 (4.06) 0.000 0.505 (12.83) 0.705 (17.91) 0.905 (22.99) 1.105 (28.07) 0.030 dia. (0.76) FIGURE 17: CASE E2 BOTTOM VIEW CASE E3 FMH EMI Filter: Screening – Standard, ES, or 883 Projection Weld Seam Seal Squared corner and dot on case top indicate pin one. 0.030 dia. (0.76) 0.960 (24.38) 1 2 3 5 4 1.205 (30.61) 0.000 0.25 (6.35) 0.000 0.330 max (8.38) 0.25 (6.35) 0.000 0.330 max (8.38) 0.160 (4.06) 0.000 0.205 (5.21) 0.560 (14.22) FIGURE 18: CASE E3 B8-11 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