model b3-13 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. 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. mil-std n oise m anagement 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. t ransient s uppression 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. o perating t emperature the filter is rated to operate with no degradation of performance over the temperature range of -55? to +125? (as measured at the baseplate). above +125?, current must be derated as specified on the following page. i nsertion l oss 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. l ayout r equirement the case pin, and ideally the case, should be tied to the case of the converter through a low-inductance connection. emi i nput f ilter 28 v olt i nput fmc emi filter 2.7 amp f eatures ?5? to +125? 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 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. fmc-461 fmc-461nt 2.7 amp 2.7 amp
typical characteristics recommended operating conditions absolute maximum ratings input voltage 0 to 40 vdc continuous lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +150? b3-14 fmc emi filter 2.7 amp input voltage range 16 to 40 vdc continuous for 40 w load case operating temperature (tc) ?5? to +125? full power derating dc input and output current derate linearly from 100% at 125? to 0% at 135? case electrical characteristics: 25? tc, nominal vin, unless otherwise specified. emi i nput f ilters capacitance 0.038 f max, any pin to case isolation 100 megohm minimum at 500 v any pin to case, except case pin fmc-461 fmc-461nt 1 parameter conditions min typ max min typ max units input voltage continuous 0 28 40 0 28 40 vdc input clamping ?5? 40.8 45.1 49.4 voltage 25? 44.7 47.0 49.4 vdc 125? 44.7 49.5 54.2 input current 2.7 2.7 a differential mode 200 khz 40 40 db noise rejection 400 khz - 50 mhz 50 50 common mode noise rejection 2 mhz - 50 mhz 40 40 db dc resistance (r dc ) tc = 25? 0.20 0.20 output voltage 2 steady state v out = v in - i in (r dc )v out = v in - i in (r dc ) vdc output current ripple 1.0 1.0 a rms steady state 2.7 2.7 a internal power dissipation maximum current 1.6 1.6 w 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.
pin out model numbering key 12 3 4 5 dot on top of package indicates pin one dotted line outlines flanged package option. bottom view fmc non-flanged and flanged fmc - 461 nt f / 883 base model mil-std-461 reference screening (standard screening has no designator in this position.) no transorb option (standard fmc-461 has no designator in this position) case option (non-flanged case has no designator in this position) b3-15 emi i nput f ilters see section b8, cases h1 and k2 for dimensions. pin designation 1 positive input 2 positive output 3 case ground 4 output common 5 input common f igure 2: p in o ut dscc number dscc d rawing (5915) 94010-01hxc 94010-01hzc 94010-02hxc 1 94010-02hzc 1 fmc-461 f ilter s imilar p art fmc-461/883 fmc-461f/883 fmc-461nt/883 1 fmc-461ntf/883 1 for exact specifications for a dscc product, refer to the dscc drawing. see section a3, ?md/dscc lists? for more information. 6 f 6800 pf / 500 v (4 times) positive input input common positive output output common fmc-461 fmc-461/883 35.6 h 1 f 68 3300 pf / 500 v in5649a 277 h 6 f 4.7 1 1 1 f igure 1: s chematic ?t ypical v alues fmc emi filter 2.7 amp 1. no transorb (nt) flanged smds have the suffix hzc instead of hxc. 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.
b3-16 typical performance curves: 25? tc , nominal vin, unless otherwise specified. emi i nput f ilters fmc emi filter 2.7 amp 90 70 50 30 .015 0.1 1 10 50 10 emission level (dma) frequency ( mhz ) f igure 3 frequency (hz) 1 k attenuation (db) 10 k 100 k 1 m -95 -75 -55 -35 -15 5 f igure 4 f igure 5 -10 0 10 frequency (hz) 1 k 10 k 100 k 1 m -20 db ohms = 20 log z out dc/dc converter typical worst case emi with fmc-461 filter fmc-461 typical amplitude response vs. frequency typical output impedance (z) with input shorted 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.
b8-17 case h c ases case h bottom view see figures 29 ?34 for pin configurations. 2.125 max (53.98) 1.125 max (28.58) 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 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. dot on top of case indicates pin one 0.155 (3.94) 0.955 (24.26) seam seal 0.000 0.040 dia (1.02) 0.000 0.000 0.400 max. (10.16) 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 2.090 (53.01) 1.110 (28.19) 12 3 4 5 fmc emi filter: screening ?standard, es, or 883 sfmc emi filter: screening ?space standard, h, or k bottom view case h1 squared corner and dot on top of case indicate pin one. f igure 29: c ase h1 f igure 28: c ase h m aximum d imensions note: although every effort has been made to render the case drawings at actual size, variations in the printing process may ca use some distortion. please refer to the numerical dimensions for accuracy.
b8-26 case k c ases 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 case k bottom view see figures 42 - 48 for pin configuration 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: 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) 1.125 max (28.58) 2.910 max (73.91) dot on top of case indicates pin one f igure 41: c ase k m aximum d imensions
b8-27 case k c ases 0.155 (3.94) 0.955 (24.26) 0.000 0.040 dia (1.02) 0.000 0.000 0.400 max. (10.16) 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 1.110 (28.19) 12 4 5 flanged case fm-704a emi filter: screening ?standard, es, or 883 bottom view case k1 0.162 dia (4.11) seam seal 0.230 (5.84) 2.320 (58.93) dot on top of case indicates pin one 3 6 f igure 42: c ase k1 0.155 (3.94) 0.955 (24.26) seam seal 0.000 0.040 dia (1.02) 0.000 0.000 0.400 max. (10.16) 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 2.090 (53.01) 1.110 (28.19) 12 4 5 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 bottom view case k2 0.162 dia (4.11) 0.230 (5.84) 2.320 (58.93) dot on top of case indicates pin one 3 f igure 43: c ase k2
c2-10 test (125? products) standard /es /883 (class h)* pre-cap inspection method 2017, 2032 yes yes yes temperature cycle (10 times) method 1010, cond. c, -65? to 150? no no yes method 1010, cond. b, -55? to 125? no yes no constant acceleration method 2001, 3000 g no no yes method 2001, 500 g no yes no burn-in method 1015, 160 hours at 125? no no yes 96 hours at 125? case (typical) no yes no final electrical test mil-prf-38534, group a subgroups 1 through 6: -55?, +25?, +125? no no yes subgroups 1 and 4: +25? case yes yes no hermeticity testing fine leak, method 1014, cond. a no yes yes gross leak, method 1014, cond. c no yes yes gross leak, dip (1 x 10 -3 ) yes no 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 ?5? to +125?. mor series mflhp series mfl series mhp series mtr series mqo series** mhd series mhv series mhf+ series mhf series** mga 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 qa screening 125? products 125? p roducts applies to the following products **mflhp series, mqo series, mhf series, fmd emi filters, hum modules, and lcm modules do not offer ?83?screening.
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