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models i nput v oltage and c urrent b3-7 input (v) 28 28 270 270 current ( a) 7.0 15.0 0.7 1.5 description the fmd series and fme series emi filters are specifically designed to reduce the reflected input ripple current of interpoints high frequency dc/dc converters. fmd/fme filters minimize elec- tromagnetic interference (emi) for the mhe, mhl, mlp, mrh, mto, mhf, mhf+, mhv, mhd, mtr, mfl, mhp, and mflhp series. these filters are intended for use in 28 or 270 volt applications which must meet mil-std-461c, ce03 levels of conducted emis- sions. one filter can be used with multiple converters up to the rated output current of the filter. i nput r ipple and emi switching dc/dc converters naturally generate two noise compo- nents on the power input line: differential noise and common mode noise. input ripple current refers to both of these components. differential noise occurs between the positive input and input common. most interpoint converters have an input filter that reduces differential noise which is sufficient for many applications. common mode noise occurs across stray capacitances between the converters power train components and the baseplate (bottom of the package) of the converter. where low noise currents are required to meet ce03 of mil-std- 461, a power line filter is needed. the fmd/fme series of emi power line filters reduces the common mode and differential noise generated by the converters. fmd/fme-461 filters reduce input ripple current by as much as 60 db at 500 khz and 55 db at 1 mhz when used in conjunction with interpoints dc/dc converters. see figures 8 and 9. place the filter as close as possible to the converter for optimum performance. the baseplates of the filter and the converter should be connected with the shortest and widest possible conductors. for the best connection, mount the filters and converters baseplates on or above a small ground plane. see figure 5. t ransients the transients listed below will not damage the filter but will be passed on to the converter: all filters: 600 volts (50 ohm source impedance) for up to 10 s. 28 volt filter: 100 volts (0.5 ohm source impedance) for up to 100 ms. 270 volt filter: 500 volts (independent of source impedance) for up to 100 ms. o peration over t emperature all fmd/fme-461 series filters are rated for full power operation from ?5? to +125? case temperature. current is derated linearly to zero at +135? case temperature. i nsertion l oss the maximum dc insertion loss at full load and nominal input voltage represents a power loss of less than 4%. p ackaging fmd/fme-461 filters are sealed in metal hermetic side-leaded packages. see section b8, cases u1, u2, v, w, y, and z. additionally the fmd28-461 filter is available in a metal hermetic down-leaded package (see section b8, case j4). l ayout r equirements the case of the filter must be connected to the case of the converter through a low impedance connection to minimize emi. emi i nput f ilters 28 & 270 v olt i nput fmd/fme emi filter 0.7 to 15 amp f eatures ?5? to +125? operation up to 60 db attenuation at 500 khz. compliant to mil-std-461c, ce03 compatible with mil-std-704e dc power bus size (max.): case u2, fme all models; case u1, fmd28-461sl and fmd270-461sl 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 11.16 mm) [fme models, shown in case u2 (flanged, short leads). also available: flanged ? leads bent down (case v); tabbed ?leads bent up (case w), short leads (case y), and leads bent down (case z).see section b8, cases u2, v, w, y, and z for dimensions and options.] case j4, fmd28-461 2.720 x 1.350 x 0.505 inches (69.09 x 34.29 x 12.83 mm) see section b8, cases j4, u1, u2, v, w, y, and z for dimensions. weight: 77 grams typical cases u1, u2, v, w, y, and z; 55 grams typical case j4 screening: standard, es, or 883 (class h). see section c2 for screening options, see section a5 for ordering information.
absolute maximum ratings recommended operating conditions input voltage 0 to 40 vdc continuous for 28 v models 0 to 400 vdc continuous for 270 v models lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +150? isolation 100 megohm minimum at 500 v, any pin to case (except fmd downleaded case case pin) b3-8 fmd/fme emi filter 0.7 to 15 amp input voltage range 0 to 40 vdc continuous for 28 v models 0 to 400 vdc continuous for 270 v models case operating temperature (tc) ?5? to +125? full power ?5? to +135? absolute derating input/output current linearly from 100% at 125? to 0% at 135 c electrical characteristics: 25? tc, nominal vin, unless otherwise specified. emi i nput f ilters fmd28-461 fmd270-461 fme28-461 fme270-461 parameter condition min typ max min typ max min typ max min typ max units input voltage continuous 0 28 40 0 270 400 0 28 40 0 270 400 vdc transient 100 ms 1 ?00 100 ?00 500 ?00 100 ?00 500 v noise 500 khz 50 60 50 60 30 40 40 50 db rejection 1 mhz 45 55 45 55 40 50 45 55 dc resistance max. current (r dc ) tc=25? 0.12 5.0 0.07 2.0 tc=125? 0.15 6.3 0.07 3.2 capacitance any pin to case 20,000 30,000 60,000 60,000 pf output voltage steady state v out = v in - i in (r dc ) vdc output current steady state 7 0.7 15 1.5 a power max. current dissipation tc=25? 6.0 2.5 15.75 4.5 w tc=125? 7.4 3.1 15.75 7.2 note 1. 28 v models = 0.5 source impedance, 270 v models = independent of source impedance.
b3-9 fmd/fme emi filter 0.7 to 15 amp emi i nput f ilters 6 m f 50 v 0.015 m f 500 v positive input input common positive output output common fme28-461 1.25 m h 1.25 m h 0.55 m h 100 m h 6 m f 50 v 100 m h 6 m f 50 v 0.015 m f positive input input common positive output output common fme270-461 37 m h 37 m h 37 m h 1.8 mh 0.68 m f 0.68 m f 1.3 v 1.8 mh 0.015 m f x2 x2 f igure 1: fme28-461 s chematic ?t ypical v alues f igure 2: fme270-461 s chematic ?t ypical v alues
b3-10 fmd/fme emi filter 0.7 to 15 amp emi i nput f ilters 0.1 m f 50 v 0.01 m f 500 v positive input input common positive output output common fmd28-461 4.1 m h 4.1 m h 4.1 m h 135 m h 6 m f 50 v 10 m f 50 v 1.3 v 135 m h 0.015 m f 500v 0.015 m f positive input input common positive output output common fmd270-461 18.5 m h 18.5 m h 0.68 m f 0.68 m f 1.3 v 0.015 m f 844 m h 844 m h +vin +vout input common output common case r l r l emi filter dc/dc converter +vin +vout input common output common case chassis ground multiple units allowed up to rated output current of filter f igure 5: c onnection d iagram f igure 3: fmd28-461 s chematic ?t ypical v alues f igure 4: fmd270-461 s chematic ?t ypical v alues 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.
pin out down-leaded model pin out side-leaded models model numbering key angled corner and cover marking indicate pin one for cases u1, u2, and v. cover marking indicates pin one for cases w, y and z. top view all fme models, fmd28-461sl, and fmd270-461sl (pin side, marked side) 1 2 3 4 5 6 12 11 10 9 8 7 fme 28 - 461 v / 883 base model input voltage mil-std-461 reference screening case/lead option* (standard screening has no designator in this position.) b3-11 fmd/fme emi filter 0.7 to 15 amp emi i nput f ilters outline shown is case u2, pin out is the same for all side-leaded cases. also available: flanged ? leads bent down (case v); tabbed ?leads bent up (case w), short leads (case y), and leads bent down (case z). see section b8, cases u1, u2, v, w, y, and z for dimensions. pin 1 designation 1, 2, 3 positive input 4, 5, 6 input common 7, 8, 9 output common 10, 11, 12 positive output case ground 2 notes 1. all pins must be connected. 2. the baseplate is the only case ground connection and should directly contact chassis ground. fmd28-461sl, fmd270-461sl, fme28-461, and fme270-461 f igure 6: p in o ut s ide -l eaded m odels 543 12 squared corner and dot on top of package indicate pin one. bottom view fmd28-461 f igure 7: p in o ut fmd28-461 see section b8, case j4, for dimensions. pin designation 1 positive input 2 positive output 3 output common 4 case ground 1 5 input common note 1. although down-leaded packages can be connected to chassis ground with the case ground lead, direct contact of the base plate to chassis improves emi performance. dscc numbers dscc d rawing (5915) 95004-01hxc 95004-01htc 95004-01huc 95004-01hyc 95004-01hzc 95009-01hxc in process in process in process in process fme s eries s imilar p art fme28-461/883 fme28-461w/883 fme28-461v/883 fme28-461y/883 fme28-461z/883 fme270-461/883 fme270-461w/883 fme270-461v/883 fme270-461y/883 fme270-461z/883 fmd28-461 for exact specifications for a dscc product, refer to the dscc drawing. contact your interpoint representative for status on the fme dscc releases. see section a3, ?md/dscc lists? for more information. *case/lead option: see section b8, cases j4, u1, u2, v, w, y, and z for drawings and dimensions, see section a5 for ordering information. fme models: case u2 has no designator in the case/lead option position. to designate a case option add the case letter to the model number fme28-461 v . fmd models: case j4 (down-leaded) has no designator in the case/lead- option position. to designate case u1 (side-leaded) for the fmd place "sl" in the case/lead option position ?fmd28-461 sl . the 270 volt fmd is only available in the side-leaded case ?fmd270-461sl.
b3-12 typical performance curves: 25? tc , nominal vin, unless otherwise specified. f igure 11 frequency (khz) 1.0 10 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.1 100 impedance (ohms) dc bias: 10 amp fme28-461 output impedance frequency (mhz) emission level (db a 0.1 1 1 0 5 0 90 80 70 60 50 40 30 20 10 0 .015 ce03 limit narrowband f igure 8 frequency (mhz) emission level (db a) 0.1 1 1 0 5 0 90 80 70 60 50 40 30 20 10 0 .015 narrowband ce03 limit f igure 9 f igure 10 frequency (khz) 1.0 10 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.1 100 impedance (ohms) dc bias: 1 amp fme28-461 output impedance fmd/fme emi filter 0.7 to 15 amp emi i nput f ilters three paralleled and synchronized mfl2815d converters without filtering. three paralleled and synchronized mfl2815d converters with an fme28-461. 22021-001-dts rev b ( ca se j 4 ) dq# 4002 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 spec- ifications without notice. fmd series and fme series are trademarks of interpoint. copyright 1992 - 1999 interpoint. all rights reserved.
b8-36 case case u c ases materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold 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. case u top view (pin side) see figures 55 and 56 for dimensions 1.505 max (38.23) 3.005 (76.33) max. note: pins are shown for case u1. angled corner indicates pin one f igure 54: c ase u m aximum d imensions
b8-38 case u c ases angled corner indicates pin one. 0.000 0.050 (1.27) 0.000 0.120 (3.05) 0.250 (6.35) 0.450 (11.43) 0.650 (16.51) 0.850 (21.59) 1.050 (26.67) 1.250 (31.75) 1.380 (35.05) 0.000 0.120 (3.05) 0.250 (6.35) 2.750 (69.85) 2.880 (73.15) 0.128 dia (3.25). 0.040 dia (1.02) 0.400 (10.16) max. 0.220 (5.59 seam seal pin-side view case u2* (flanged case, short leads) mor series and fme emi filters: screening ?standard, es, or 883 also available in v, w, y, and z cases (figures 57 - 60) pin length 0.30 0.05 (7.6 1.3) 1 2 3 4 5 6 12 11 10 9 8 7 *no designator is required in the case option position, see section a5, ordering information. f igure 56: c ase u2
b8-39 case v c ases 0.000 0.220 (5.59) 0.050 (1.27) 0.400 (10.16) max 0.250 (6.35) .050 (1.27) 0.225 (5.72 3.45 (87.6) reference (lead center to lead center) 0.000 0.120 (3.05) 0.250 (6.35) 0.450 (11.43) 0.650 (16.51) 0.850 (21.59) 1.050 (26.67) 1.250 (31.75) 1.380 (35.05) 0.000 0.120 (3.05) 0.250 (6.35) 2.750 (69.85) 2.880 (73.15) 0.128 dia (3.25) 0.040 dia (1.02) pin-side view case v* flanged case, down leaded) mor series and fme emi filters: screening ?standard, es, or 883 also available in u2, w, y, and z cases (figures 56 and 58 - 60) *requires case option designator added to model number: mor2805s v see section a5, ordering information. 1 2 3 4 5 6 12 11 10 9 8 7 maximum dimensions: 3.005 x 1.505 (76.33 x 38.23 mm) materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold 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. angled corner indicates pin one. f igure 57: c ase v
b8-40 case w c ases 1 2 3 4 5 6 12 11 10 9 8 7 0.040 dia (1.02) 0.250 (6.35) typ. 0.125 (3.18) 0.375 (9.53) 0.575 (14.61) 0.775 (19.69) 0.975 (24.77) 1.175 (29.85 1.375 (34.93) 1.625 (41.28) 2.125 (53.98) 0.375 (9.53) 0.140 dia (3.56) 0.000 1.750 (44.45) 0.000 0.250 (6.35) typ. 1.450 (36.83) 0.300 (7.62) 1.750 (44.45) 2.000 (50.80) pin-side view case w* (tabbed case, up-leaded) mor series and fme emi filters: screening ?standard, es, or 883 also available in u2, v, y, and z cases (figures 56, 57, 59 and 60) 0.000 0.220 (5.59) 0.050 (1.27) 0.400 (10.16) max. 0.000 0.220 (5.59) 0.400 (10.16) max. 0.84 0.05 (21.3 1.3) 0.84 0.05 (21.3 1.3) 0.150 (3.81) lead detail 2.80 (71.1) reference (lead center to lead center) *requires case option designator added to model number: mor2805s w see section a5, ordering information. materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold 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. f igure 58: c ase w
b8-41 case y c ases bathtub seam seal 0.250 (6.35) typ. 0.125 (3.18) 0.375 (9.53) 0.575 (14.61) 0.775 (19.69) 0.975 (24.77) 1.175 (29.85 1.375 (34.93) 1.625 (41.28) 2.125 (53.98) 0.375 (9.53) 0.140 dia (3.56) 0.000 1.750 (44.45) 0.000 0.250 (6.35) typ. 1.450 (36.83) 0.300 (7.62) 1.750 (44.45) 2.000 (50.80) 0.000 0.220 (5.59) 0.050 (1.27) 0.400 (10.16) max. pin-side view case y* (tabbed case, straight leads) mor series and fme emi filters: screening ?standard, es, or 883 also available in u2, v, w, and z casee (figures 56, 57, 58 and 60) 0.000 0.220 (5.59) 0.400 (10.16) max. 0.30 0.05 (7.6 1.3) lead detail pin length 0.30 0.05 (7.6 1.3) 3.10 (78.7) reference *requires case option designator added to model number: mor2805s y see section a5, ordering information. 0.040 dia (1.02) 1 2 3 4 5 6 12 11 10 9 8 7 materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold 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. f igure 59: c ase y
b8-42 case z c ases 0.250 (6.35) typ. 0.125 (3.18) 0.375 (9.53) 0.575 (14.61) 0.775 (19.69) 0.975 (24.77) 1.175 (29.85 1.375 (34.93) 1.625 (41.28) 2.125 (53.98) 0.375 (9.53) 0.140 dia (3.56) 0.000 1.750 (44.45) 0.000 0.250 (6.35) typ. 1.450 (36.83) 0.300 (7.62) 1.750 (44.45) 2.000 (50.80) pin-side view case z* (tabbed case, down-leaded) mor series and fme emi filters: screening ?standard, es, or 883 also available in u2, v, y, and w cases (figures 56, 57, 58 and 59) *requires case option designator added to model number: mor2805s z see section a5, ordering information. 0.000 0.220 (5.59) 0.050 (1.27) 0.400 (10.16) max. 0.000 0.220 (5.59) 0.400 (10.16) max. 0.36 0.05 (9.1 0.13) 0.150 (3.81) lead detail 2.80 (71.1) reference (lead center to lead center) 0.36 0.05 (9.1 0.13) 0.040 dia (1.02) 1 2 3 4 5 6 12 11 10 9 8 7 materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold 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. f igure 60: c ase z
b8-37 case u c ases angled corner indicates pin one. 1 2 3 4 5 6 12 11 10 9 8 7 0.000 0.050 (1.27) 0.000 0.120 (3.05) 0.250 (6.35) 0.450 (11.43) 0.650 (16.51) 0.850 (21.59) 1.050 (26.67) 1.250 (31.75) 1.380 (35.05) 1.505 (38.23) max. 0.000 0.120 (3.05) 0.250 (6.35) 2.750 (69.85) 2.880 (73.15) 3.005 (76.33) max. 0.128 dia (3.25). 0.040 dia (1.02) 0.23 (5.8) lead length 0.400 (10.16) max. 0.220 (5.59 top view case u1 mfl series and mhp series: screening ?standard, es or 883 mflhp series, fmd270 emi filter, and fmd28-461sl emi filters: screening ?standard or es smfl, smflhp, smhp, and ssp series; sfcs, and sfme emi filters: screening ?standard, class h or k hum70 module and lcm module: screening ?standard or es seam seal f igure 55: c ase u1
b8-22 case j c ases materials header case j1 cold rolled steel/nickel/gold cases j2 - j5 cold rolled steel/nickel/tin cover case j1 kovar/nickel case j2 - j5 cold rolled steel/nickel/tin pins #52 alloy (all cases) case j1 mhv series triple ?compression glass seal mtr series triple ?ceramic seal cases j2 - j5 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 j bottom view see figures 36 - 40 for pin configuration 1.350 max (34.29) 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 j1 and j5 0.060 (1.52) case j2 0.073 (1.85) max cases j3 and j4 0.067 +0.005/-0.007 (1.70 +0.13/-0.8) 2.720 max (69.09) dot on top of case indicates pin one f igure 35: c ase j 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.
b8-25 case j c ases 0.040 dia. (1.02) 0.000 0.25 (6.4) 54 3 0.000 0.170 (4.32) 0.210 (5.33) 1.370 (34.80) 1.770 (44.96) 2.150 (54.61) 1 2 0.173 (4.39) 0.000 1.173 (29.79 0.673 (17.09) 0.162 dia (4.11) flanged cases: designator required in case option position of model number. fmd28-461 emi filter (down-leaded): screening standard or es bottom view case j4 (rev b) solder seal solder tip-off 0.505 max (12.83) squared corner and dot on top of case indicate pin one. f igure 39: c ase j4
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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