1 lambda advanced analog inc. l l preliminary aif28515q quad output, hybrid - high reliability dc/dc converter description features the aif28515 dc/dc converter features an internal emi filter and four high performance outputs to obtain a moderate power density without derating over the full military temperature range. this device also offers input conditioning for operation from nominal +28 volt, mil-std 704a input power. this series incorporates lambda advanced analog's proprietary magnetic pulse feedback technology providing optimum dynamic line and load regulation response. this feedback system samples the output voltage at the pulse width modulator fixed clock frequency, nominally 600 khz. undervoltage lockout, soft-start and load fault protection are provided on this device. these converters are hermetically packaged in an enclosure of modest dimension, utilizing copper core pins to minimize resistive dc losses. these pin leads are each fabricated with lambda advanced analog's rugged ceramic lead-to-package seal assuring long term hermeticity in the most harsh environments. manufactured in a facility fully qualified to mil-prf- 38534, these converters are available in several screening grades to satisfy a range of requirements. the hb grade is fully processed and screened to the class h requirement of mil-prf-38534, but does not have material element evaluated to the class h requirement. this grade is tested to meet the complete group "a" test specification over the full military temperature range without output power deration. two additional grades with more modest screening are also available for use in less demanding applications. variations in electrical, mechanical and screening can be accommodated. contact lambda advanced analog for special requirements. n n 18 to 50 volt continuous input range n n internal mil-std-461 input emi n n compatible with mil-std-704a power bus n n 45 watts output power n n moderate power density ? ? 15 w / in 3 n n low profile seam welded package n n ceramic feedthru copper co re pins n n operation over full military temperature range n n continuous short circuit and overload protection n mil-hdbk-217f, n2 mtbf of 50k hours at 71oc, auf n device weight < 100 gms n 100 m w w isolation, input to output and case
2 specifications aif28515q absolute maximum ratings input voltage -0.5 v to 50 v continuous +80 v for 100msec soldering temperature 300c for 10 seconds case temperature operating -55c to +125c storage -65c to +135c static characteristics -55c t case +125c, 18 v in 50 unless otherwise specified. parameter group a subgroups test conditions min nom max unit input voltage note 6 18 28 50 v output voltage 1 1 1 1 2, 3 2, 3 2, 3 2, 3 v in = 28 volts, 100% load positive output 1 negative output 1 positive output 2 negative output 2 positive output 1 negative output 1 positive output 2 negative output 2 4.95 -5.05 14.55 -15.45 4.90 -5.10 14.70 -15.30 5.00 -5.00 15.00 -15.00 5.05 -4.95 15.45 -14.55 5.10 -4.90 15.30 -14.70 v v v v v v v v output current v in = 18, 28, 50 volts - notes 6, 11 positive output 1 negative output 1 either output 2 a a a output power total of all outputs. notes 6, 11 45 w output voltage temperature coefficient v in = 28 volts, 100% load - notes 1, 6 positive output 1 all other outputs -0.025 ?0.075 +0.025 +0.075 %/c output voltage regulation line load cross 1, 2, 3 1, 2, 3 1, 2, 3 note 10 no load, 50% load, 100% load v in = 18, 28, 50 volts -10.0 -1.0 -1.0 +10.0 +1.0 +1.0 mv % % output ripple voltage 1, 2, 3 v in = 18, 28, 50 volts, 100% load, bw = 10mhz positive output 1 negative output 1 eother output 2 30 50 100 mv pp mv pp mv pp input current no load 1 2, 3 v in = 28 volts, i out = 0 100 120 ma ma input ripple current 1, 2, 3 v in = 28 volts, 100% load, bw = 10mhz 60 ma pp load fault power dissipation 1, 2, 3 v in = 28 volts 32 w efficiency 1, 2, 3 100% load 63 % switching frequency 1, 2, 3 560 600 640 khz current limit point v out = 90% v nom , v in = 28 volts, note 5 positive output 1 negative output 1 positive output 2 negative otput 2 6.8 0.45 0.57 0.57 7.2 0.48 0.60 0.60 7.6 0.51 0.63 0.63 a a a a
3 dynamic characteristics -55c t case +125c, v in = 28 volts unless otherwise specified. parameter group a subgroups test conditions min nom max unit load transient response positive output 1 amplitude recovery amplitude recovery negative output 1 amplitude recovery amplitude recovery positive output 2 amplitude recovery amplitude recovery negative output 2 amplitude recovery amplitude recovery 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 note 2, 8 load step 50% ? 100% load step 10% ? 50% load step 50% ? 100% load step 10% ? 50% load step 50% ? 100% load step 10% ? 50% load step 50% ? 100% load step 10% ? 50% -250 -250 -40 -40 -500 -500 -500 -500 250 250 250 250 40 200 40 200 500 200 500 200 500 200 500 200 mv m sec mv m sec mv m sec mv m sec mv m sec mv m sec mv m sec mv m sec line transient response amplitude recovery note 1, 2, 3 v in step = 18 ? 50 volts -200 200 500 mv m sec turn-on characteristics overshoot delay 4, 5, 6 4, 5, 6 v in = 18, 28, 50 volts. note 4 2 250 15 mv msec load fault recovery same as turn on characteristics. 5 msec line rejection mil-std-461d, cs101, 30hz to 50khz note 1 45 50 db conducted emissions mil-std-461c, n2, 10 khz ? 50 mhz < 20 db over spec limit notes to specifications: 1. parameters not 100% tested but are guaranteed to the limits specified in the table. 2. recov ery time is measured from the initiation of the transient to where v out has returned to within 1% of v out at 50% load. 3. line transient transition time 3 100 m sec. 4. turn-on delay is measured with an input voltage rise time of bet ween 100 and 500 volts per millisecond. 5. current limit point is that condition of excess load causing output voltage to drop to 90% of nominal. 6. parameter verified as part of another test. 7. all electrical tests are performed with the remote sense lea ds connected to the output leads at the load. 8. load transient transition time 3 12 m sec. 9. enable inputs internally pulled high. nominal open circuit voltage ? 4.0vdc. 10. load regulation is tested with 50%load on the outputs not being tested. 11. output load must be distributed so that a miniimum of 20% of the total output power is being provided by one of the outputs. 12. cross regulation measured with load on tested output at 50% of maximum load while changing the load on the other outputs from 10% to 50%.
4 aif28515q case outline insert case drawing here
5 aif28515q pin designation pin no. designation 1 n/c 2 n/c 3 n/c 4 n/c 5 +28 v input 6 input return 7 positive output 1 8 output 1 return 9 negative output 1 10 positive output 2 11 output 2 return 12 negative output 2 available screening levels and process variations for aif28515q converters requirement mil-std-883 method no suffix es suffix hb suffix temperature range -20c to +85c -55c to +125c -55c to +125c element evaluation internal visual 2017 ? temperature cycle 1010 cond b cond c constant acceleration 2001, 500g cond a burn-in 1015 96hrs @ 125c 160hrs @ 125c final electrical (group a) mil-prf-38534 specification 25c 25c -55, +25, +125c seal, fine & gross 1014 cond c cond a, c cond a, c external visual 2009 ? ? per commercial standards part numbering aif 28 515 s / ch model input voltage 28 = 28v output voltage 515 = 5, 15 outputs q = quad screening ? , es, hb
lambda advanced analog the information in this data sheet has been carefully checked and is believed to be accurate; however no responsibility is assumed for possible errors. these specifications are subject to change without notice. 9811 lambda advanced analog inc. l mil-prf-38534 qualified iso 9001 registered 2270 martin avenue santa clara ca 95050-2781 (408) 988- 4930 fax (408) 988-2702 6
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