www.irf.com 1 emi filterhybrid-high reliability ame270461 series description up to 1.5 ampere output current attenuation > 35db @ 200 khz low profile (0.38) seam welded package ceramic feedthru copper-core pins operation over full military temp. range standard military drawings available features ame typical connection diagram the ame series of emi filters have been designed toprovide full compliance with the input line reflected ripple current requirement specified by ce03 of mil- std-461c over the full military temperature range while operating in conjunction with the corresponding afl series of dc-dc converters. these filters are offered as part of a complete family of conversion products providing single and dual output voltages while operating from nominal +270 input line voltage. other converters operating with a similar switching frequency will also benefit by use of this device. these emi filters are hermetically packaged in twoenclosure variations, utilizing copper-core pins to minimize resistive dc losses. three lead styles are available, each fabricated with international rectifiers rugged ceramic lead-to-package seal assuring long term hermetic seal integrity in harsh environments. manufactured in a facility fully qualified to mil-prf-38534, these converters are available in four screening grades to satisfy a wide range of applications. the ch grade is fully compliant to the requirements of mil- prf-38534 for class h. the hb grade is fully processed and screened to the class h requirement, but does not include element evaluation to the class h requirement. both grades are tested to meet the completegroup a test specification over the full military temperature range with no derating. two grades with more limited screening are also available for use in less demanding applications. variations in electrical, mechanical and screen requirements can be accommodated. contact ir san jose forspecial requirements. ame270461 emi filter afl270xx or other dc/dc converter +vin +vin input return input return +vout +vout output return output return to additional converters up to total of filter rated output current r l r l system bus afl270xx or other dc/dc converter +vout output return +vin input return note: filter and converter cases should be electrically connected pd-94596b downloaded from: http:///
2 www.irf.com ame270461 series specifications notes to specifications absolute maximum ratings note 1 input voltage -720v to +720v note 2 input current 3.0a lead soldering temperature 300c for 10 seconds case temperature operating -55c to +125c storage -65c to +135c electrical characteristics -55c t case +125c, -400v v in +400v unless other wise speci fied 1. operation above maximum ratings may cause permanent damage to the device. opera tion at maximum ratings may degrade performance and affect reliability. 2. device can tolerate 720 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 incl udes the sum of the input to output resistance and the return in to return out resistance paths. parameter group a subgroups test conditions min max unit leakage current note 3 1, 2, 3 500v dc input voltage 0 50 a dc resistance note 4 1, 2, 3 t c = 25c t c = 125c 400 700 m ? noise reduction 4, 5, 6 200 khz - 500 khz 500 khz - 1 mhz 1 mhz C 10 mhz 35 60 65 db isolation 1 any pin to case, tested @ 500vdc 100 m ? capacitance 1 2, 3 measured between any pin and case 34 30 56 62 nf downloaded from: http:///
www.irf.com 3 ame270461 series block diagram refer to last page for pin designation 7 12 1 6 2.24 f 1.12 f 20 nf 20 nf case output outputreturn input input return 2 3 5 4 11 10 8 9 circuit operation and application information the ame series of filters employ three stages offiltering in a low pass configuration designed to attenuate the higher frequency components of ripple currents generated by high frequency switching dc- dc converters. the block diagram describes the general arrangement of the principal elements which have been connected to provide both differential and normal mode buffering between the input and output terminals. employing only passive elements, ame filteroperation is initiated simply by insertion into the input power path between one or more dc-dc converters and their input dc voltage bus. in this connection, output pins of the filter will be connected to input pins of the converters. when a single ame filter is used in conjunction with multiple dc-dc converters, the use will be limited to the maximum output current capability specified in the ame electrical table. 1 a typical connection utilizing one filter to drive twoconverters is illustrated on page 1. 1 to calculate the input current ( i in ) requirement of any one converter, first determine the maximum output power by multiplying output voltage by maximum load current, divide this power by the efficiency to obtain input power and then divideinput power by inputvoltage to obtain the input current ( i in ). note that to obtain worst case input current, you must use maximum load current, minimum efficiency and minimum line voltage in this calculation. downloaded from: http:///
4 www.irf.com ame270461 series requirement mil-std-883 method no suffix es suffix hb suffix ch suffix temperature range -20 to +85c -55c to +125c -55c to +125c -55c to +125c element evaluation mil-prf-38534 internal visual 2017 yes yes yes temperature cycle 1010 cond b cond c cond c constant acceleration 2001 500g cond a cond a burn-in 1015 48hrs@ 85 c 48hrs@ 125c 160hrs @ 125c 160hrs @ 125c final electrical (group a) mil-prf-38534 & specification 25c 25c -55, +25, +125c -55, +25, +125c seal, fine & gross 1014 cond a cond a, c cond a, c cond a, c external visual 2009 yes yes yes available screening levels and process variations standard military drawing pin vendor cage code vendor similar pin 98026-01hua 52467 ame270461w/ch 98026-01huc 52467 ame270461w/ch 98026-01hxa 52467 ame270461x/ch 98026-01hxc 52467 ame270461x/ch 98026-01hya 52467 ame270461y/ch 98026-01hyc 52467 ame270461y/ch 98026-01hza 52467 ame270461z/ch 98026-01hzc 52467 ame270461z/ch available standard military drawing (smd) cross reference * per commercial standards downloaded from: http:///
www.irf.com 5 ame270461 series mechanical diagrams case x case w pin variation of case y 1.260 1.500 2.500 2.760 3.000 ? 0.128 0.2501.000 ref 0.200 typ non-cum 0.050 0.220 pin? 0.040 0.238 max 0.380 max 2.975 max 1 6 7 12 0.050 0.220 0.250 1.000 pin ? 0.040 0.525 0.380 max 2.800 0.42 case y case z pin variation of case y 1.500 1.750 2.500 0.25 typ 1.150 0.050 0.220 1 6 7 12 1.750 0.375 2.00 0.2501.000 ref 0.200 typ non-cum pin? 0.040 0.300 ? 0.140 0.238 max 0.380 max 2.975 max 0.050 0.220 0.2501.000 ref pin ? 0.040 0.525 0.380 max 2.800 0.36 tolerances, unless otherwise specified: .xx = 0.010 .xxx = 0.005 downloaded from: http:///
6 www.irf.com ame270461 series pin designation pin no. designation 1 positive input 2 positive input 3 positive input 4 input return 5 input return 6 input return 7 output return 8 output return 9 output return 10 positive output 11 positive output 12 positive output part numbering ame 270 461 x / ch model input voltage 28 = 28v 50 = 50v 270 = 270v applicable military test standard case style w, x, y, z screening , es, hb, ch world headquarters: 233 kansas st., el segundo, california 90245, tel: (310) 252-7105 ir san jose: 2520junction 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. 02/2010 downloaded from: http:///
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