12/13/02 www.irf.com 1 advanced analog emi filter hybrid / high reliability ame50461 series description up to 7.0 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 to provide 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 pro- viding single and dual output voltages while operating from nominal +28, +50 or +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 two en- closure variations, utilizing copper-core pins to mini- mize resistive dc losses. three lead styles are avail- able, each fabricated with advanced analog?s rugged ceramic lead-to-package seal assuring long term her- metic seal integrity in harsh environments. manufactured in a facility fully qualified to mil-prf- 38534, these converters are available in four screen- ing 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 complete group ?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. varia- tions in electrical, mechanical and screen re- quirements can be accommodated. contact ad- vanced analog for special requirements. ame50461 emi filter afl50xx or other dc/dc converter +vin +vin in p ut return in p ut return +vout +vout out p ut return out p ut return to additional converters u p to total of filter rated out p ut current r l r l system bus afl50xx or other dc/dc converter +vout out p ut return +vin in p ut return note: filter and converter cases should be electrically connected pd - 94595
2 www.irf.com ame50461 series specifications electrical characteristics -55c t case +125c, -40 v in +40 unless otherwise specified notes to specifications 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 300 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. absolute maximum ratings note 1 input voltage -300v to +300v note 2 input current 7.0 a lead soldering temperature 300c for 10 seconds case temperature operating -55c to +125c storage -65c to +135c parameter group a subgroups test conditions min nom max unit input voltage steady state transient note 2 -100 -300 +100 +300 v dc output voltage 1, 2, 3 v out = v in - i in (r dc ) v dc output current note 3 7.0 a dc dc resistance note 4 1 t c = 25c t c = 125c 60 100 m ? power dissipation maximum current t c = 25c t c = 125c 2.94 4.90 w noise reduction 200 khz - 500 khz 500 khz - 1 mhz 1 mhz - 50 mhz 35 60 65 db isolation 1 any pin to case tested @ 500vdc 100 m ? capacitance measured between any pin and case 40 nf device weight slight variations with case style 95 gms
www.irf.com 3 ame50461 series ame50461 block diagram refer to last page for pin designation circuit operation and application information the ame series of filters employ three stages of fil- tering in a low pass configuration designed to at- tenuate 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 out- put terminals. 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 divide input power by input voltage 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. 7 12 1 6 20 nf 20 nf case output output return input input return 2 3 5 4 11 10 8 9 employing only passive elements, ame filter opera- tion 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, out- put 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 two converters is illus- trated on page1. although expressly designed to complement the afl series of dc/dc converters, the ame50461 filters can be successfully operated in conjunction with other converters in the advanced analog line in- cluding the asa, ahf, ahv and atr series.
4 www.irf.com ame50461 series ame50461 case style outlines case x case w pin variation of case y 1.260 1.500 2.500 2.760 3.000 ? 0.128 0.250 1.000 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 0.250 1.000 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 0.250 1.000 ref pin ? 0.040 0.525 0.380 max 2.800 0.36 tolerances, unless otherwise specified: .xx = 0.010 .xxx = 0.005
www.irf.com 5 ame50461 series pin designation world headquarters: 233 kansas st., el segundo, california 90245, tel: (310) 322 3331 advanced analog: 2270 martin av., santa clara, california 95050, tel: (408) 727-0500 visit us at www.irf.com for sales contact information . data and specifications subject to change without notice. 12/02 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 50 461 x / ch model in p ut volta g e 28 = 28v 50 = 50v 270 = 270v a pp licable militar y test standard case st y le w, x, y, z screenin g ? , es, hb, ch available screening levels and process variations for ame50461 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 * per commercial standards
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