www.irf.com 1 description 5.0 watts output power available in 3.3, 5, 12 and 15 volt outputs 16 - 40 vdc input range (28 vdc nominal) total ionizing dose > 25krads (si) see hardened to let up to 60 mev . cm 2 /mg -55c to +125c operating range indefinite short circuit protection flexible mounting fully isolated - input to output and to case complimentary emi filter available electrical performance similar to asa28xxs series standard microcircuit drawings available features 28v input, single output the ama28xxs series of dc/dc converter modules has been specifically designed for operation in moderate radiation environments supplementing the higher radiation performance available in the international rectifier art2815t converter series. environments presented to space vehicles operating in low earth orbits, launch boosters, orbiting space stations and similar applications requiring a low power, high performance converter with moderate radiation hardness performance will be optimally served by the ama28xxs series. the ama28xxs has been designed for high density using chip and wire hybrid technology that complies with the class h is requirements of mil-prf-38534. manufactured in a facility fully qualified to mil-prf- 38534, these converters are fabricated utilizing dscc qualified processes. for available screening options, refer to device screening table in the data sheet. applicable generic lot qualification test data including radiation performance can be made available on request. variations to the standard screening can be accommodated. consult ir santa clara for special requirements. ama28xxs series the physical configuration of the ama28xxs series permits mounting directly to a heat conduction surface without the necessity of signal leads penetrating the heat sink surface. this package configuration permits greater independence in mounting and more mechanical security than traditional packages. international rectifiers?srugged ceramic seal pins are used exclusively in the package thereby assuring long term hermeticity. hybrid - high reliability radiation tolerant dc/dc converter ama pd-94687c
2 www.irf.com ama28xxs series specifications for notes to specifications, refer to page 4 static characteristics -55c t case +125c, v in =28 v dc 5%, c l =0, unless otherwise specified. parameter group a subgroups test conditions min nom max unit input voltage 16 28 40 v output voltage ama2803r3s ama2805s ama2812s ama2815s ama2803r3s ama2805s ama2812s ama2815s 1 1 1 1 2, 3 2, 3 2, 3 2, 3 iout=0 3.25 4.95 11.88 14.85 3.20 4.90 11.76 14.70 3.30 5.00 12.00 15.00 3.35 5.05 12.12 15.15 3.40 5.10 12.24 15.30 v output current 1 ama2803r3s ama2805s ama2812s ama2815s 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 vin = 16, 28, 40 volts 1200 1000 417 333 ma output power 1 ama2803r3s all others 1, 2, 3 1, 2, 3 vin = 28 volts, 100% load 3.96 5.00 w output ripple voltage 2 ama2803r3s ama2805s ama2812s ama2815s 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 vin = 16, 28, 40 volts 100% load bw = 20 hz to 2 mhz 200 200 200 200 mv pp output voltage regulation line load 1, 2, 3 1, 2, 3 v in = 16, 28, 40 volts iout = 0, 50%, and 100% load 10 10 50 50 mv input voltage range -0.5v to +50vdc (continuous), input voltage range +16v to +40vdc 80v (100ms) output power less than or equal to 5w soldering temperature 300c for 10 seconds operating case temperature -55c to +125c storage case temperature -65c to +135c recommended operating conditions absolute maximum ratings
www.irf.com 3 ama28xxs series static characteristics (continued) -55c t case +125c, v in =28 v dc 5%, c l =0, unless otherwise specified . for notes to specifications, refer to page 4 parameter group a subgroups test conditions min nom max unit input current no load inhibit 1, 2, 3 1, 2, 3 vin=28v, iout=0, inhibit (pin 5)=open inhibit (pin 5) shorted to input return (pin 7) 20 8.0 50 12 ma input ripple current 2 1, 2, 3 vin = 16, 28, 40 volts, 100% load, bw = 20 hz to 2 mhz 100 ma pp efficiency ama2803r3s ama2805s ama2812s ama2815s ama2803r3s ama2805s ama2812s ama2815s 1, 3 1, 3 1, 3 1, 3 2 2 2 2 100% load 63 66 71 71 60 66 68 68 % isolation 1 input to output or any pin to case (except pin 8) at 500vdc 100 m ? capacitive load 3, 4 ama2803r3s ama2805s ama2812s ama2815s 4 no effect on dc performance 500 500 100 100 f short circuit power dissipation 1, 2, 3 4.0 w mtbf mil-hdbk-217f, sf @ t c =35c 700 khrs weight 32 g
4 www.irf.com ama28xxs series dynamic characteristics -55c t case +125c, v in =28 v dc 5%, c l =0, unless otherwise specified. 1 parameter guaranteed by line and load regulation tests. 2 bandwidth guaranteed by design. tested for 20 khz to 2 mhz. 3 capacitive load may be any value from 0 to the maximum limit without compromising dc performance. a capacitive load in exce ss of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuit ry, appearing as a short circuit during turn on. 4 parameter shall be tested as part of design characterization and after design or process changes. parameters shall be guara nteed to the limit specified in electrical specifications. 5 load step transition time between 2 and 10 microseconds. 6 recovery time is measured from the initiation of the transient to where v out has returned to within 1 % of v out at 50 percent load. 7 input step transition time between 2 and 10 microseconds. 8 turn on delay time measurement is for either a step application of power at the input or the removal of a ground signal fro m the inhibit pin while power is applied to the input. notes to specifications parameter group a subgroups test conditions min nom max unit short circuit recovery 4 4, 5, 6 0% load to 100% load 25 ms switching frequency 4, 5, 6 100% load 500 550 600 khz output response to step transient load changes 8 4, 5, 6 4, 5, 6 load step 50% 100% load step 0% 50% -450 -750 +450 +750 mv pk recovery time, step transient load changes 5, 6 ama2803r3s ama2805s ama2812s ama2815s ama2803r3s ama2805s ama2812s ama2815s 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 load step 50% 100% load step 0% 50% 300 300 100 100 2000 2000 2000 2000 s output response transient step line changes 4, 7 ama2803r3s ama2805s ama2812s ama2815s 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 input step 16 40vdc, 100% load -450 -550 -750 -750 +450 +550 +750 +750 mv pk recovery time transient step line changes 4, 6, 7 4, 5, 6 input step 16 40vdc, 100% load 1200 s turn on overshoot 8 4, 5, 6 4, 5, 6 0% load 100% load 600 400 mv pk turn on delay 8 4, 5, 6 0% load to 100% load 25 ms
www.irf.com 5 ama28xxs series block diagram application information inhibit function (enable) connecting the enable input (pin 5) to input common (pin 7) will cause the converter to shut down. it is recommended that the enable pin be driven by an open collector device capable of sinking at least 400 a of current. the open circuit voltage of the inhibit input is 10 +1.0 v dc . an optional emi filter is available (afh461) that will reduce the input ripple current to levels below the limits imposed by mil-std-461 ce03. emi filter radiation specification parameter condition min typ max unit total ionizing dose mil-std-883, method 1019.4 operating bias applied during exposure 25 ? ? krads (si) heavy ion (single event effects) bnl dual van de graf generator 60 ? ? mev ? cm 2 /mg international rectifier currently does not have a dscc certified radiation hardness assurance program. controller error amplifier 8 6 7 5 case enable input return +input cs housekeeping supply 1 2 output return +output
6 www.irf.com ama28xxs series mechanical outline pin designation 1.380 0.125 0.880 ? 0.140 x 3 0.25 typ 68 7 1 2 3 5 1.130 1.130 1.63 0.200 0.400 0.800 0.17 0.33 0.170 0.26 typ 0.030 dia tolerance unless otherwise specified: x.xx 0.010 x.xxx 0.005 pin # designation 1 + input 2 output return 3nc 4 blank 5 enable 6 + input 7 input return 8 case ground
www.irf.com 7 ama28xxs series part numbering world headquarters: 233 kansas st., el segundo, california 90245, tel: (310) 252-7105 ir santa clara: 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. 09/2006 device screening requirement mil-std-883 method no suffix em temperature range -55c to +125c -55c to +85c element evaluation mil-prf-38534 class h n/a non-destructive bond pull 2023 n/a n/a internal visual 2017 yes temperature cycle 1010 cond c cond c constant acceleration 2001, y1 axis 3000 gs 3000 gs pind 2020 cond a n/a 320 hrs @ 125c 48 hrs @ 125c ( 2 x 160hrs ) final electrical mil-prf-38534 -55c, +25c, -55c, +25c, ( group a ) & specification +125c +85c pda mil-prf-38534 2% n/a seal, fine and gross 1014 cond a, c cond a radiographic 2012 yes n/a external visual 2009 yes burn-in 1015 notes: best commercial practice. international rectifier currently does not have a dscc certified radiation hardness assurance program. standard microcircuit drawing equivalence table standard microcircuit ir standard drawing number part number 5962-04247 ama2805s 5962-04248 ama2812s 5962-04249 ama2815s ama 28 05 s /em model input voltage 28 = 28v output s = single d = dual output voltage 03r3 = 3.3v, 05 = 5v 12 = 12v, 15 = 15v screening level (please refer to screening table) no suffix, em
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