www.irf.com 1 emi filter hybrid - high reliability description up to 2.0 a output current attenuation > 60db@500 khz low profile seam welded package ceramic insulated copper core pins operation over full military temp. range no derating for -55c to +125c features afh typical connection diagram the afh series emi filter has been designed to provide full compliance with the input line reflected ripple current requirement specified by ce03 of mil-std-461c over the extended military temperature range while operating in conjunction with the corresponding ama, amf and amr series of dc-dc converters. these filters are offered as part of a family of high reliability conversion products providing single, dual and triple output voltages while operating from nominal +28 volt input line. other converters operating with a similar switching frequency will also benefit by use of this device. these emi filters are hermetically packaged in a seam welded enclosure utilizing axially oriented copper-core pins which minimize resistive dc losses. this package has been configured to complement the ama, amf and amr packages as a convenience in system installation and is fabricated with international rectifier?s rugged ceramic lead-to-package seal assuring long term hermetic seal integrity in harsh environments. the em grade is processed and screened to a lower grade requirement. flight grade are tested to meet the complete group ?a? test specifications over the full military temperature range with no derating. the design does not meet mil-std- 975 voltage derating requirements for some ineternal components. variations in electrical, mechanical and screening requirements can be accommodated. contact ir san jose for special requirements. afh461 series afh461 emi filter amf28xx (or other) dc/dc converter +v in +vin input return input return +vout +vout output return output return r l r l system bus amf28xx (or other) dc/dc converter +vout output return +vin input return designed to meet the stringent requirements of military and aerospace use, these devices are manufactured in a facility fully qualified to mil-prf-38534, and are available in two screening grades. the flight grade is designed with the requirements of mil-prf-38534 for class k. pd-95856c
2 www.irf.com afh461 series specifications notes to specifications electrical characteristics -55c t case +125c, 0 v in +50 unless otherwise specified input voltage -80v to +80v, note 2 input curent 3.0a lead soldering temperature +300c for 10 seconds case temperature - operating -55c to +125c case temperature - storage -65c to +135c absolute maximum ratings, note 1 group a parameter subgroup conditions min. nom. max. unit 1, 2, 3 i in < 500 a0+40 transient, note 2 -50 +50 output current, note 3 2.0 a dc dc resistant, note 4 1 t c = 25c 150 250 m power dissipation maximum current, t c = 25c 1.0 w t c = 25c noise reduction 4, 5, 6 1.0 khz -1.0 +1.0 200 khz - 500 khz -40 db 500 khz - 10 mhz -60 isolation 1 any pin to case, tested @ 500v dc 100 m capacitance 1, 2, 3 measured between any pin and case 32 44 48 nf device weight slight variation with case style 30 g v dc input voltage 1 . operation above maximum ratings may cause permanent damage to the device. operation at maximum ratings may degrade performance and affect reliability. 2. device can tolerate 100 volt transient whose duration is 100 ms when r s 0.5 ? . 3. derate output current linearly from 100% at 125c to 0 at 135c. 4. dc resistance is the total resistance of the device and includes the sum of the input to output resistance and the return in to return out resistance paths.
www.irf.com 3 afh461 series typical filter ce03 performance fig 1. ahf2805s ce03 performance without afh461 filter fig 2. ahf2805s ce03 performance with afh461 filter
4 www.irf.com afh461 series available screening levels and process variations fig 3. block diagram 1 5 3 2 4 +input - input + output - output case requirement mil-std-883 method flight no suffix /em suffix temperature range -55c to +125c -55c to +125c element evaluation mil-prf-38534, class k ? internal visual 2017 yes yes temperature cycle 1010 cond c ? constant acceleration 2001 cond a ? burn-in interim electrical @ 160 hrs 1015 320 hrs @ 125c 48 hrs @ 125c final electrical (group a) read & record data mil-prf-38534 & specification -55c, +25c, +125c +25c pda (25c, interim to final) 2% ? seal, fine & gross 1014 cond a, c cond a, c radiographic 2012 yes ? external visual 2009 yes yes
www.irf.com 5 afh461 series case style outline part numbering pin no. designation 1 positive input 2 positive output 3 case ground 4 output common 5 input common pin designation afh 461 / em model applicable military test standard screening suffix none = flight /em = engineering model world headquarters: 233 kansas st., el segundo, california 90245, tel: (310) 252-7105 ir san jose: 2520 junction avenue, san jose, california 95134, tel: (408) 434-5000 visit us at www.irf.com for sales contact information . data and specifications subject to change without notice. 08/2012 0.725 1.450 0.625 1.25 0.200 0.285 0.80 1.37 1.120 0.40 0.225 ? 0.104 3 plcs 0.220 0.050 0.260 0.015 0.325 max. 1.57 5 1 4 3 2 r 0.09 0.030 dia., 5 plcs. tolerances: .xx = 0.010 .xxx = 0.005
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