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description the intepoint? smtr series? of 28 volt dc/dc converters offers up to 30 watts of output power from single, dual or triple output configurations. they operate over the full military temperature range of -55c to +125c with up to 84% efficiency (up to 73% efficiency triple models). smtr converters are packaged in hermetically sealed metal enclosures, making them ideal for use in military, aerospace and other high reliability applications. s c r e e n i n g smtr converters offer screening options to space prototype (o), class h, or class k. radiation tolerant to radiation hardness assurance (rha) levels of - (o), p, or r, per mil-std- 38534. interpoint? model numbers use an o in the rha designator position to indicate the - (dash) radiation hardness assurance level of mil-prf-38534, which is defined as no rha. see screening tables 1 and 2 for more information. c o n v e r t e r d e s i g n the smtr converters are constant frequency, pulse-width mod ulated switching regulators which use a quasi-square wave, single ended, forward converter design. tight load regulation is maintained by using a wide bandwidth magnetic feedback and, on single output models, through use of remote sense. on dual output models, the positive output is independently regulated and the negative output is cross regulated through the use of tightly- coupled magnetics. the smtr triple series dc/dc converters design includes individual regulators on the auxiliary outputs which provide for no cross regulation error when a minimum 300 ma load is maintained on the main (+5 v) output. smtr converters have an internal input filter that help reduce the need for external components in normal operation. use our sfmc emi input filter to meet the requirements of mil-std- 461cs ce03. for the lowest noise performance, connection of the case to input common is recommended. the connection can be hard-wired or ac coupled with a small ceramic bypass capacitor. indefinite short circuit protection and overload protection are provided by a constant current-limit feature. this protective system senses current in the converters secondary stage and limits it to approximately 125% of the maximum rated output current. s y n c h r o n i z a t i o n synchronizing the converter with the system clock allows the designer to confine switching noise to clock transitions, minimizing interference and reducing the need for filtering. in sync mode, the converter will run at any frequency between 500 khz and 675 khz. the sync control operates with an active high at any duty cycle between 40% and 60%. the sync pin should be connected to input common pin when not in use. w i d e v o l t a g e r a n g e smtr converters are designed to provide full power operation over a full 16 to 40 vdc voltage range. operation below 16 volts, including mil-std-704d emergency power conditions is possible with derated power. i m p r o v e d d y n a m i c r e s p o n s e the smtr series feed-forward compensation system provides excellent dynamic response and noise rejection. audio rejection is typically 40 db (50 db for triple output models). the min. to max. step line transient response is typically less than 4%. features single, dual and triple models operating temperature -55 to +125c ? qualified to mil-prf-38534 class h and k ? radiation hardness assurance (rha) ? to level r 100 krad(si) input voltage range 16 to 40 vdc ? transient protection 50 v for 50 ms ? fully isolated, magnetic feedback ? fixed high frequency switching, 600 khz typical ? trim function or remote sense on single output models ? inhibit function ? synchronization function ? indefinite short circuit protection ? up to 84% efficiency (up to 73% efficiency triple models) ? models vdc o u t p u t single 1.5 2.5 3.3 5 12 15 dual 5 12 15 triple +5 & 12 +5 & 15 the information in this document is a derivative of documents cleared by the department of defense (dod) office of security review (osr) for public release. osr case numbers 09-s-1002 dated march 24, 2009 and 09-s-1960 dated june 22, 2009. crane aerospace & electronics power solutions smtr single, dual and triple dc/dc converters page 1 of 20 28 v olt input C 30 watt smtr rev g - 2011.05.04 crane aerospace & electronics crane electronics, inc. power solutions C interpoint? po box 97005 ? redmond, wa 98073-9705 425.882.3100 ? power@crane-eg.com www.craneae.com/interpoint
i n h i b i t f u n c t i o n smtr converters provide an inhibit terminal that can be used to disable internal switching, resulting in no output and very low quiescent input current. the converter is inhibited when the inhibit pin is pulled to 0.8v. the unit is enabled when the pin, which is internally connected to a pull-up resistor, is left unconnected or is connected to an open-collector gate. the open circuit output voltage associated with the inhibit pin is 9 to 11 vdc. in the inhibit mode, a maximum of 8 ma must be sunk from the inhibit pin. operatin g conditions and characteristics input voltage range 16 to 40 vdc continuous ? 50 v for 50 msec transient ? output power up to 30 watts depending on model ? l ead soldering temperature (10 sec per pin) 300c ? storage temperature range (case) -65c to +150c ? case operating temperature (tc) -55c to +125c full power ? -55c to +135c absolute ? derating output power/current linearly from 100% at 125c to 0% at 135c ? output voltage temperature coefficient 100 ppm/c typical single and dual outputs ? 200 ppm/c main, 300 ppm/c aux triple output ? input to output capacitance 50 pf typ (100 pf typ triple outputs) ? current limit 125% of full load typical ? isolation 100 megohm minimum at 500 vdc ? any pin to case, except case pin ? a udio rejection 40 db typ (50 db typ, triple output) ? conversion frequency free run 550 min, 600 typ, 650 max khz ? external sync 500 to 675 khz ? mechanic al and environmental size (maximum) single and dual output ? n on-flanged: 2.100 x 1.115 x 0.400 inches ? (53.34 x 28.32 x 10.16 mm) see case h2 for dimensions. flanged: 2.910 x 1.115 x 0.400 inches ? (73.91 x 28.32 x 10.16 mm) see case k3 for dimensions. triple output ? n on-flanged: 1.950 x 1.350 x 0.405 inches ? (49.53 x 34.29 x 10.29 mm) see case f1 for dimensions. flanged: 2.720 x 1.350 x 0.405 inches ? (69.09 x 34.29 x 10.29 mm) see case j1 for dimensions. weight (maximum) single and dual non-flanged 50 grams, flanged 52 grams ? triple non-flanged 58 grams, flanged 62 grams ? screening space prototype (o), class h, or class k are radiation tolerant to radiation hardness assurance (rha) levels of - (o), p or r, per mil-std-38534. interpoint model numbers use an o in the rha designator position to indicate the - (dash) radiation hardness assurance level of mil-prf- 38534, which is defined as no rha. see screening tables 1 and 2 for more information. available configurations are: oo, hp, kp, hr, and kr sync and inhibit (inh1, inh2) sync sync in ? input frequency 500 to 675 hz. ? duty cycle 40% min, 60% max ? active low 0.8 v max ? active high 4.5 v min, 5 v max ? referenced to input common ? sync out ? referenced to input common ? inhibit (do not apply a voltage to the inhibit pin) converter disabled (active low) ? pull voltage to 0.8 v or below by connecting to ground or ? other method. inhibit pin source current, 8 ma max ? referenced to input common ? converter enabled (active high) ? inhibit pin open or through an open collector ? if not used, leave unconnected ? open pin voltage 9 to 11 v ? crane aerospace & electronics power solutions www.craneae.com/interpoint page 2 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
trim and remote sense (available on single output models only) r l output common remote sense connection 2 make connections at load. smtr single output converter 4 3 5 10 1 +v in input common 6 sense return sense positive output 2 2 external trim connection 1 make connections at converter. r l output common smtr single output converter 4 3 5 10 1 +v in input common 6 sense return sense positive output 1 r t 1 f i g u r e 2: r e m o t e s e n s e 2, 3 f i g u r e 1: t r i m c o n n e c t i o n 1, 2, 3 n otes for remote sense and trim 1. when trimming output voltage and/or remote sensing, the total output voltage increase must be less than 0.6 volts at the converters pins. do not exceed maximum power. 2. if neither voltage trim nor remote sense will be used, connect pin 3 to pin 4 and pin 5 to pin 6 or the output voltage will increase by 1.2 volts. 3. cautio n : the converter will be permanently damaged if the posi- tive remote sense (pin 6) is shorted to ground. damage may also result if the output common or positive output is disconnected from the load with the remote sense leads connected to the load. 4. when using remote sense for voltage compensation or when using remote sense for trim, the output will drift over temperature. contact applications engineering for more information at powerapps@ crane-eg.com trim formulas vout = desired output voltage; r t = trim resistor 3.3v: r t = 1300 * vout C 4304 1.2475 5v: r t = 1300 * vout C 6512 1.2475 12v: r t = 1300 * vout C 15631 1.2475 15v: r t = 1300 * vout C 19498 1.2475 crane aerospace & electronics power solutions www.craneae.com/interpoint page 3 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
bottom view smtr single flanged and non-flanged dot on top of cover indicates pin one. dotted line outlines flanged package option. 6 10 7 8 9 1 2 3 4 5 f i g u r e 3: p in o u t s mtr s i n g l e o u t p u t m o d e l s bottom view smtr dual flanged and non-flanged dot on top of cover indicates pin one. 6 10 7 8 9 1 2 3 4 5 dotted line outlines flanged package option. f i g u r e 4: p in o u t s mtr d u a l o u t p u t m o d e l s see cases h2 and k3 for dimensions. see cases h2 and k3 for dimensions. bottom view smtr triple flanged and non-flanged dotted line outlines flanged package option. 10 9 8 7 6 1 2 3 4 5 squared corner and dot on top of package indicate pin one. f i g u r e 5: p in o u t s mtr t r i p l e see cases f1 and j1 for dimensions. pin o ut pin single output dual output triple output 1 positive input positive input positive input 2 inhibit inhibit main (+5) output 3 sense return positive output output common 4 output common output common n eg. aux. output 5 positive output n egative output pos. aux. output 6 positive sense case ground case ground 7 case ground case ground case ground 8 case ground case ground inhibit 9 sync sync sync 10 input common input common input common pins not in use inhibit leave unconnected sync in connect to input common sense lines must be connected to appropriate outputs crane aerospace & electronics power solutions www.craneae.com/interpoint page 4 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 att smtr rev g - 2011.05.04
model numberin g key to indicate the flanged case option change the x to z in the smd number. the smd number shown is for class k screening, non-flanged, and radiation hardness assurance (rha) level r. see the smd for the numbers for other screening and radiation levels. for exact specifications for an smd product, refer to the smd drawing. smds can be downloaded from: http://www.dscc.dla.mil/programs/smcr smtr 28 512 t f / k r base model input voltage output voltage screening radiation hardness assurance (rha) number of outputs case option ("f" indicates flanged option, non-flanged case has no designator in this position) (s=single, d=dual, t=triple) (main and aux. vout for triple models) smd nu mbers s t a n d a r d m i c r o c i r c u i t d r a w i n g (s md) smtr s imilar p a r t 5962r0150102kxc smtr283r3s/kr 5962r9306802kxc smtr2805s/kr 5962r9306902kxc smtr2812s/kr 5962r9307002kxc smtr2815s/kr 5962r9320502kxc smtr2805d/kr 5962r9307102kxc smtr2812d/kr 5962r9307202kxc smtr2815d/kr 5962r9307402kxc smtr28515t/kr model selection o n t h e l i n e s b e l o w , e n t e r o n e s e l e c t i o n f r o m e a c h c a t e g o r y t o d e t e r m i n e t h e m o d e l n u m b e r . ca tegor y smtr28 / _______ base model and input voltage output voltage 1 n umber of outputs 2 case option 3 screening 4 rha 5 selection smtr28 is the only available selection 1r5, 2r5, 3r3, 05, 12, 15 s (non-flanged o o 05, 12, 15 d leave blank ) h p 512, 515 t f (fla nged) k r notes: 1. output voltage: an r indicates a decimal point. 1r5 is 1.5 volts out. the value of 1r5, 2r5, and 3r3 are only available in single output models. the 512 and 515 triple output converters are +5 volt main and 12 or 15 volt auxiliaries. 2. n umber of outputs: s is a single output, d is a dual output, and t is a triple output 3. case options: for the standard case (cases f1 and h2 on pages 15 and 16) leave the case option blank. for the flanged case option (cases j1 and k3 on pages 17 and 18), insert the letter f in the case option position. 4. screening: a screening level of o is a space prototype and is only available with rha o. see screening tables 1 and 2 for more information. 5. rha: interpoint model numbers use an o in the rha designator position to indicate the - (dash) radiation hardness assurance level of mil-prf-38534, which is defined as no rha. rha o is only available with screening level o. see screening table 2 for more information. crane aerospace & electronics power solutions www.craneae.com/interpoint page 5 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
notes 1. g uaranteed by design, not tested. 2. operation is limited below 16 v (see figure 22). 3. tested with 6800 pf ceramic bypass capacitor connected externally from input common to case. 4. short circuit protection not guaranteed above 125c case temperature. 5. recovery time is measured from application of the transient to the point at which vout is within 1% of final value. 6. tested on release from inhibit. electrical characteristics: -55c to +125c t c , 28 vdc vin, 100% load, no irradiation, unless otherwise specified. single output models smtr281r5s smtr282r5s smtr283r3s units parameter conditions min typ max min typ max min typ max output voltage 1.455 1.545 2.425 2.575 3.201 3.399 vdc output current v in = 16 t o 40 vdc 0 8.0 0 8.0 0 6.06 a output power 2 v in = 16 t o 40 vdc 12 20 20 w output ripple 10 k h z t o 2 mh z t c = 25c C 20 50 25 65 20 40 mv p-p t c = -55c to +125c 50 65 50 line regulation v in = 16 t o 40 vdc 0 10 0 10 0 20 mv load regulation no load t o full 2 10 2 10 2 20 mv input voltage no load t o full continuous 16 28 40 16 28 40 16 28 40 vdc transien t 50 ms 1 50 50 50 v input current no load 45 90 60 100 30 75 ma inhibited 8 8 8 input ripple current 3 10 k h z - 10 mh z 20 50 25 50 25 50 ma p-p efficiency t c = 25c 57 60 68 70 70 73 % t c = -55c to +125c 55 66 66 loa d fault 4 short circuit power dissipation 13 13 12 w recovery 1 6 6 6 ms step load response 50% - 100% - 50% load transient 75 125 90 150 130 300 mv pk recovery 1, 5 200 200 200 s step line response 1 16 - 40 -16 vdc transient 300 300 300 mv pk recovery 5 300 300 300 s start-up 6 delay 5 5 5 ms overshoot full load 1 0 30 0 30 0 50 mv pk overshoot no load 1 75 125 150 capacitive load 1 t c = 25c no effect on dc performance 1000 1000 300 f ` crane aerospace & electronics power solutions www.craneae.com/interpoint page 6 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
electrical characteristics: -55c to +125c t c , 28 vdc vin, 100% load, no irradiation, unless otherwise specified. single output models smtr2805s smtr2812s smtr2815s units parameter conditions min typ max min typ max min typ max output voltage 4.85 5.15 11.64 12.36 14.70 15.30 vdc output current v in = 16 t o 40 vdc 0 5.0 0 2.5 0 2.0 a output power 2 v in = 16 t o 40 vdc 25 30 30 w output ripple 10 k h z t o 2 mh z t c = 25c C 20 50 15 40 15 40 mv p-p t c = -55c to +125c 90 90 90 line regulation v in = 16 t o 40 vdc 10 50 10 50 10 50 mv load regulation no load t o full 10 50 10 50 20 50 mv input voltage no load t o full continuous 16 28 40 16 28 40 16 28 40 vdc transien t 50 ms 1 50 50 50 v input current no load 35 75 35 75 35 75 ma inhibited 8 8 8 input ripple current 3 10 k h z - 10 mh z 25 50 35 50 30 50 ma p-p efficiency t c = 25c 74 78 78 83 79 84 % t c = -55c to +125c 71 75 76 loa d fault 4 short circuit power dissipation 12 12 12 w recovery 1 5 5 5 ms step load response 50% - 100% - 50% load transient 180 300 270 400 310 500 mv pk recovery 1, 5 300 300 300 s step line response 1 16 - 40 -16 vdc transient 300 500 600 mv pk recovery 5 300 300 300 s start-up 6 delay 5 5 5 ms overshoot full load 1 0 50 0 120 0 150 mv pk overshoot no load 1 250 600 750 capacitive load 1 t c = 25c no effect on dc performance 300 300 300 f notes 1. g uaranteed by design, not tested. 2. operation is limited below 16 v (see figure 22). 3. tested with 6800 pf ceramic bypass capacitor connected externally from input common to case. 4. short circuit protection not guaranteed above 125c case temperature. 5. recovery time is measured from application of the transient to the point at which vout is within 1% of final value. 6. tested on release from inhibit. crane aerospace & electronics power solutions www.craneae.com/interpoint page 7 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
electrical characteristics: -55c to +125c t c , 28 vdc vin, 100% load, no irradiation, unless otherwise specified. dual output models smtr2805d smtr2812d smtr2815d units parameter conditions min typ max min typ max min typ max output voltage +v o u t 4.85 5.15 11.64 12.36 14.55 15.45 vdc -v o u t 4.83 5.18 11.58 12.42 14.47 15.53 output current 2, 3 ea ch output 0 2.50 4.50 1 0 1.25 2.25 1 0 1.00 1.80 1 a v in = 16 t o 40 vdc total 5 2.5 2 output power 3, 4 ea ch output 12.5 22.5 1 15 27 1 15 27 1 w v in = 16 t o 40 vdc total 25 30 30 output ripple v o u t 10 k h z t o 2 mh z t c = 25c 20 40 30 80 25 80 mv p-p t c = -55c to +125c 90 150 120 line regulation v in = 16 t o 40 vdc +v o u t 0 50 0 50 0 50 mv -v o u t 10 100 15 150 10 180 load regulation balanced, no load t o full +v o u t 5 50 5 50 50 mv -v o u t 15 100 30 150 180 cross regulation effect on -v out 1 s e e n o t e 5 12 8.3 8 % s e e n o t e 6 6 6 6 input voltage no load t o full continuous 16 28 40 16 28 40 16 28 40 vdc transien t 50 ms 1 50 50 50 v input current no load 28 75 40 75 48 75 ma inhibited 8 8 8 input ripple current 7 10 k h z - 10 mh z 25 50 35 50 35 50 ma p-p efficiency t c = 25c 74 76 77 80 78 81 % t c = -55c to +125c 72 75 75 loa d fault 8 v o u t short circuit power dissipation 8 12 6 12 5 12 w recovery 1, 9 5.0 5.0 5.0 ms step load response v out b a l a n c e d l o a d 50% - 100% - 50% load transient 150 300 200 300 220 400 mv pk recovery 1, 9 200 200 200 s step line response 1 v out, 16 - 40 -16 vdc transient 400 400 500 mv pk recovery 9 300 300 300 s start-up v out delay 7 5 5 5 ms overshoot full load 1 180 150 150 mv pk overshoot no load 1 250 600 750 capacitive load 1 t c = 25c no effect on dc performance 500 500 500 f n otes: see page 9 crane aerospace & electronics power solutions www.craneae.com/interpoint page 8 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
n otes smtr dual output models 1. g uaranteed by design, not tested. 2. the specified max current is available from either output. 3. up to 90% of the total output current/power is available from either output providing the positive output is carrying at least 10% of the total output power. 4. operation is limited below 16 v (see figure 22). 5. effect on the negative output under the following conditions: +pout 20% to 80%; Cpout 80% to 20%. 6. effect on the negative output under the following conditions: +pout 50%; Cpout 10% to 50%. see figure 21. 7. tested with 6800 pf ceramic bypass capacitor connected externally from input common to case. 8. indefinite short circuit protection not guaranteed above 125c case temper - ature. 9. recovery time is measured from application of the transient to point at which vout is within 1% of final value. crane aerospace & electronics power solutions www.craneae.com/interpoint page 9 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
electrical characteristics: -55c to +125c t c , 28 vdc vin, 100% load, no irradiation, unless otherwise specified. triple output model C smrt28512t 5 (mai n) 12 (a uxiliaries) units parameter conditions min typ max min typ max output voltage 4.85 5.00 5.15 11.58 12.00 12.42 vdc output current 2, 3 0.30 4.00 0.416 0.625 1 a max to tal aux 0.834 output power 2, 3 20 5.0 7.5 1 w max to tal aux 10 output ripple t c = 25c 125 120 mv p-p 10 k h z - 2 mh z t c = -55c to +125c 180 120 line regulation 4 v in 16 t o 40 vdc 10 20 25 75 mv load regulation 3, 4 30 50 30 75 mv input voltage continuous 16 28 40 vdc transient 50 ms 1 50 v input current no load 40 110 ma inhibited 4 8 input ripple current 3 10 khz - 10 mhz 45 80 ma p-p efficiency t c = 25c 72 73 % t c = -55c to +125c 70 loa d fault 5 power dissipation 14 w all output s shorted recovery each 6 ms output 1 step load response 6, 7 transient 150 400 500 1500 mv pk recovery 0.05 0.30 3 6 ms step line response 1 v in 16 t o 40 vdc 800 800 mv pk transient recovery 5 5 ms start-up delay 6 6 ms overshoot 1 500 2000 mv pk notes: 1. g uaranteed by design, not tested. 2. the sum of the two aux outputs is not to exceed 10 watts. the maximum load per aux output is 7.5 watts. 3. to maintain regulation when operating the aux at full load, a minimum load of 300 ma is required on the main output. for aux loads less than full load, a lower load (<300 ma) on the main output will maintain regulation. 4. measured on each output one at a time with the other outputs at full load. 5. indefinite short circuit protection not guaranteed above 125c (case). 6. response of each output as all outputs are simultaneously transitioned. main: 50% - 100% - 50% of main full load auxiliaries: 25% - 50% - 25% each, of total auxiliary full load 7. recovery time is measured from application of the transient to point at which vout is within 1% of regulation. 8. tested on release from inhibit. crane aerospace & electronics power solutions www.craneae.com/interpoint page 10 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
triple output model C smrt28515t 5 (mai n) 15 (+aux iliaries) units parameter conditions min typ max min typ max output voltage 25c 4.95 5.00 5.05 14.77 15.00 15.23 vdc 4.85 5.15 14.47 15.52 output current 2, 3 0.30 4.00 0.333 0.50 1 a max to tal aux 0.666 output power 2, 3 20 5 7.5 1 w max to tal aux 10 output ripple t c = 25c 125 120 mv p-p 10 k h z - 2 mh z t c = -55c to +125c 180 120 line regulation 4 v in 16 t o 40 vdc 10 20 30 75 mv load regulation 3, 4 10 50 30 75 mv input voltage continuous 16 28 40 vdc transient 50 ms 1 50 v input current no load 50 110 ma inhibited 4 6 input ripple current 3 10 khz - 10 mhz 40 80 ma p-p efficiency 25c 72 73 % 70 loa d fault 5 all output s shorted power dissipation 14 w recovery each output 1 1.4 6 ms step load response 6, 7 transient 150 400 500 1500 mv pk recovery 0.05 0.30 2 6 ms step line response 1 v in 16 t o 40 vdc transient 150 800 100 800 mv pk recovery 5 5 ms start-up delay 1.4 6 6 ms overshoot 1 500 2000 mv pk electrical characteristics: -55c to +125c t c , 28 vdc vin, 100% load, no irradiation, unless otherwise specified. notes: 1. g uaranteed by design, not tested. 2. the sum of the two aux outputs is not to exceed 10 watts. the maximum load per aux output is 7.5 watts. 3. to maintain regulation when operating the aux at full load, a minimum load of 300 ma is required on the main output. for aux loads less than full load, a lower load (<300 ma) on the main output will maintain regulation. 4. measured on each output one at a time with the other outputs at full load. 5. indefinite short circuit protection not guaranteed above 125c (case). 6. response of each output as all outputs are simultaneously transitioned. main: 50% - 100% - 50% of main full load auxiliaries: 25% - 50% - 25% each, of total auxiliary full load 7. recovery time is measured from application of the transient to point at which vout is within 1% of regulation. 8. tested on release from inhibit. crane aerospace & electronics power solutions www.craneae.com/interpoint page 11 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
typical performance curves: 25c t c , 28 vdc vin, 100% load, free run, unless otherwise specified. f i g u r e 9 f i g u r e 11 output power (watts) smtr2812d efficiency efficiency (%) 60 85 80 75 70 65 5 10 15 20 25 30 16v 40v 28v 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency (khz) audio rejection, smtr series single and dual output models attenuation (db) output power (watts) smtr2805s efficiency efficiency (%) 60 85 80 75 70 65 5 10 15 20 25 16v 40v 28v f i g u r e 6 output power (watts) smtr2812s efficiency efficiency (%) 60 85 80 75 70 65 5 16v 28v 40v 10 15 20 25 30 f i g u r e 7 output power (watts) smtr2815d efficiency efficiency (%) 65 90 85 80 75 70 5 10 15 20 25 30 40v 28v 16v f i g u r e 10 f i g u r e 8 output power (watts) smtr2815s efficiency efficiency (%) 62 87 82 77 72 67 5 16v 28v 40v 10 15 20 25 30 50 s/div 16 to 40v smtr2805s step line response 20mv/div 20v/div v in v out f i g u r e 12 50 s/div 50% 100% smtr2805s step load response 100mv/div 25w to 12.5w 12.5w to 25w f i g u r e 13 f i g u r e 14 50 s/div 10% 100% smtr2805s step load response 200mv/div 25w to 2.5w 2.5w to 25w crane aerospace & electronics power solutions smtr single, dual and triple dc/dc converters page 12 of 20 28 v olt input C 30 att smtr rev g - 2011.05.04 www.craneae.com/interpoint
typical performance curves: 25c t c , 28 vdc vin, 100% load, free run, unless otherwise specified. f i g u r e 21 1 output load (%) cond. b: 50% load +v, 50% to 10% ?v cond. a: 50% load ?v, 50% to 10% +v cross regulation ?v out voltage change (%) ?8 0 8 10 20 30 40 50 ?7 ?6 ?5 ?4 ?3 ?2 ?1 1 2 3 4 5 6 7 cond a cond b 2812d 2812d 2815d 2805d 2805d 50 s/div 10% 50% smtr2815d +v out step load response 100mv/div 3w to 15w 15w to 3w ?p out =15w (50%) f i g u r e 18 1 200 s/div smtr2815d turn-on into no load 5v/div 20v/div v in +v out ?v out f i g u r e 19 output power (watts) 1% drop smtr singles and duals low line dropout input voltage (volts) 13.0 13.5 14.0 14.5 15.0 15.5 16.0 9 12 15 18 21 24 27 30 f i g u r e 22 f i g u r e 20 1 3 27 6 24 9 21 12 18 15 15 18 12 21 9 24 6 27 3 30 0 +p out ?p out 0 30 output load (watts) 10% to 90% load +v 90% to 10% load ?v cross regulation ?v out voltage change (%) 10 9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 2812d 2815d 2815d 2812d 2805d 2805d f i g u r e 15 f i g u r e 17 1 1v/div 20v/div 500 s/div smtr2805s turn-on into no load v in v out 50 s/div 25% 50% smtr2815d +v out step load response 100mv/div ?p out =15w (50%) 7.5w to 15w 15w to 7.5w 50 s/div 16 v to 40 v smtr2815d step line response 20mv/div 20v/div v in +v out ?v out f i g u r e 16 f i g u r e 23 output power (watts) smtr28512t efficiency efficiency (%) 55 80 75 70 65 60 51 01 52 02 53 0 40v 28v 16v n otes: 1. percent (%) of power refers to the percent of the total output power of the converter. crane aerospace & electronics power solutions smt single ual an triple c/c conerters page 13 of 20 28 v olt input C 30 att smtr rev g - 2011.05.04 www.craneae.com/interpoint
typical performance curves: 25c t c , 28 vdc vin, 100% load, free run, unless otherwise specified. output power (watts) 1% drop smtr28512t low line dropout vs. load input voltage (volts) 13.5 5 14.0 14.5 15.0 15.5 16.0 10 15 20 25 30 f i g u r e 30 output power (watts) 1% drop smtr28515t low line dropout vs. load input voltage (volts) 13.5 5 14.0 14.5 15.0 15.5 16.0 10 15 20 25 30 f i g u r e 31 f i g u r e 27 f i g u r e 29 200mv/div 50% 100% smtr28515t step load response +5 v +aux ?aux 50% to 100% 50% to 100% 50 s/div 100mv/div 1ms/div 5v/div 20v/div 500 s/div smtr28515t, aux. (15) turn-on into full load v in 15 v out 2v/div 500 s/div smtr28515t, main (+5) turn-on into full load v in +5 v out 20v/div f i g u r e 28 f i g u r e 26 100mv/div 20v/div 50 s/div 16v to 40v smtr28515t step line response v in +5 v out +aux ?aux output power (watts) smtr28515t efficiency efficiency (%) 55 80 75 70 65 60 5 10 15 20 25 30 16v 40v 28v f i g u r e 24 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency (khz) smtr series audio rejection triple output models attenuation (db) f i g u r e 25 crane aerospace & electronics power solutions smt single ual an triple c/c conerters page 14 of 20 28 v olt input C 30 att smtr rev g - 2011.05.04 www.craneae.com/interpoint
10 9 8 7 6 0.000 0.170 (4.32) 1.170 (29.72) 0.000 0.170 (4.32) 0.570 (14.48) 0.970 (24.64) 1.370 (34.80) 1.770 (44.96) 1 2 3 4 5 0.040 dia. (1.02) 0.000 0.25 (6.4) 0.405 max (10.29) bottom view case f1 seam seal squared corner and dot on top of case indicates pin one case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300c for 10 seconds per pin. materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold ceramic seal seal hole 0.120 0.002 (3.05 0.05) case f1 smtr t, rev f, 20100429 please refer to the numerical dimensions for accuracy. 1.350 max. (34.29) 1.950 max. (49.53) f i g u r e 32: c a s e f1 - t r i p l e o u t p u t m o d e l s crane aerospace & electronics power solutions page 15 of 20 smtr single, dual and triple dc/dc converter cases 28 v olt input C 30 watt smtr rev g - 2011.05.04 www.craneae.com/interpoint
0.155 (3.94) 0.955 (24.26) 0.155 (3.94) 0.955 (24.26) seam seal 0.000 0.040 dia (1.02) 0.000 0.000 0.400 max. (10.16) 0.25 (6.4) 0.245 (6.22) 1.845 (46.86) 2.100 max. (53.34) bottom view case h2 0.000 0.000 0.245 (6.22) 1.845 (46.86) 2.100 max. (53.34) 1.115 max. (28.32) 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) squared corner and dot on top of case indicate pin one. squared corner and dot on top of case indicate pin one. case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300c for 10 seconds per pin. materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold ceramic seal seal hole 0.120 0.002 (3.05 0.05) case h2 smtr s/d, rev h - 2011.03.14 please refer to the numerical dimensions for accuracy. 1.115 max. (28.32) 1 2 6 10 3 4 5 7 8 9 dual 6 10 7 8 9 1 2 3 4 5 single f i g u r e 33: c a s e h2 - s i n g l e & d u a l o u t p u t m o d e l s crane aerospace & electronics power solutions page 16 of 20 smtr single, dual and triple dc/dc converter cases 28 v olt input C 30 watt smtr rev g - 2011.05.04 www.craneae.com/interpoint
0.040 dia. (1.02) 0.000 0.25 (6.4) 0.405 max (10.29) seam seal 10 9 8 7 6 0.000 0.170 (4.32) 0.210 (5.33) 0.570 (14.48) 0.970 (24.64) 1.370 (34.80) 1.770 (44.96) 2.150 (54.61) 1 2 3 4 5 0.170 (4.32) 0.000 1.170 (29.72) 0.670 (17.02) flanged cases: designator "f" required in case option position of model number. bottom view case j1 sharp corner and dot on top of case indicate pin one. flange thickness: 0.060 (1.52) 1.350 max. (34.29) case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300c for 10 seconds per pin. materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold ceramic seal. seal hole: 0.120 0.002 (3.04 0.05) case j1 smtr t f, rev g, 20100419 please refer to the numerical dimensions for accuracy. 2 x r 0.170 (4.32) (2.720 max (69.09)) 2 x dia 0.162 0.002 (4.11 0.05) f i g u r e 34: c a s e j1 - t r i p l e o u t p u t m o d e l s crane aerospace & electronics power solutions page 17 of 20 smtr single, dual and triple dc/dc converter cases 28 v olt input C 30 watt smtr rev g - 2011.05.04 www.craneae.com/interpoint
6 10 7 8 9 0.040 dia (1.02) 0.000 0.400 max. (10.16) 0.25 (6.4) 0.155 (3.94) 0.955 (24.26) seam seal 0.000 0.245 (6.22) ? 0.230 (5.84) 1.845 (46.86) 2.320 (58.93) 0.230 (5.84) 2.320 (58.93) 1 2 6 10 flanged cases: designator ?f? required in case option position of model number. bottom view case k3 3 4 5 7 8 9 0.000 0.245 (6.22) 1.845 (46.86) 1 2 3 4 5 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.000 1.115 max. (28.32) 0.555 (14.1) dot on top of case indicates pin one dot on top of case indicates pin one single dual flange thickness: 0.060 (1.52) case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300c for 10 seconds per pin. materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold, ceramic seal seal hole 0.120 0.002 (3.04 0.05) case k3 smtr s/d f, rev g, 2011.03.14 please refer to the numerical dimensions for accuracy. 2 x r 0.170 (4.32) 2 x dia 0.162 0.002 (4.11 0.05) 2 x r 0.170 (4.32) 2 x dia 0.162 0.002 (4.11 0.05) (2.910 max (73.91)) f i g u r e 35: c a s e k 3 - s i n g l e & d u a l o u t p u t m o d e l s crane aerospace & electronics power solutions page 18 of 20 smtr single, dual and triple dc/dc converter cases 28 v olt input C 30 watt smtr rev g - 2011.05.04 www.craneae.com/interpoint
s c r e e n i n g t a b l e 1: e l e m e n t e v a l u a t i o n s c r e e n i n g t a b l e 1: e l e m e n t e v a l u a t i o n s c r e e n i n g t a b l e 1 : e l e m e n t e v a l u a t i o n - s p a c e c o n v e r t e r s a n d f i l t e r s c l a s s h a n d k, mil-prf-38534 e l e m e n t e v a l u a t i o n c o m p o n e n t -l e v e l t e s t p e r f o r m e d s p a c e p r o t o t y p e (o) 1 n o n -qml /h c l a s s h qml /k c l a s s k qml m/s 2 m/s 2 p 3 m/s 2 p 3 element electrical ? ? ? ? ? visual ? ? ? ? internal visual ? ? temperature cycling ? ? constant acceleration ? ? interim electrical ? burn-in ? post burn-in electrical ? steady state life ? voltage conditioning aging ? visual inspection ? final electrical ? ? ? ? wire bond evaluation ? ? ? ? sem ? c-sam: input capacitors only addl test, not req. by h or k ? ? notes: 1. non-qml products may not meet all of the requirements of mil-prf-38534. 2. m/s = active components (microcircuit and semiconductor die) 3. p = passive components, class h and k element evaluation. not applicable to space prototype (o) element evaluation. definitions: element evaluation: component testing/screening per mil-std-883 as determined by mil-prf-38534 sem: scanning electron microscopy c-sam: c - mode scanning acoustic microscopy crane aerospace & electronics power solutions www.craneae.com/interpoint page 19 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt smtr rev g - 2011.05.04
s c r e e n i n g t a b l e 2: e n v i r o n m e n t a l s c r e e n i n g a n d rha c l a s s h a n d k, mil-prf-38534 e n v i r o n m e n t a l s c r e e n i n g a n d rha 1 non-qml 2 qml 3 c l a s s h c l a s s k t e s t p e r f o r m e d /oo /hp /hr /kp /kr non-destruct bond pull, method 2023 ? 4 ? 4 ? ? pre-cap inspection, method 2017, 2032 ? ? ? ? ? temperature cycle (10 times) method 1010, cond. c, -65c to +150c, ambient ? ? ? ? ? constant acceleration method 2001, 3000 g (qual 5000 g) ? ? ? ? ? pind, test method 2020, cond. a ? 4 ? 4 ? ? pre burn-in test, group a, subgroups 1 and 4 ? ? 4 ? 4 ? ? burn-in method 1015, +125c case, typical 5 96 hours ? 160 hours ? ? 2 x 160 hours (includes mid-bi test) ? ? final electrical test, mil-prf-38534, group a, subgroups 1 and 4: +25c case ? subgroups 1 through 6, -55c, +25c, +125c case ? ? ? ? hermeticity test gross leak, method 1014 ? ? ? ? ? fine leak, method 1014 ? ? ? ? ? radiography, method 2012 ? ? post radiography electrical test, +25c case ? 4 ? 4 final visual inspection, method 2009 ? ? ? ? ? rha p: 30 krad(si) total dose 6 ? ? rha r: 100 krad(si) total dose 6 ? ? see let 40 mev-cm 2 /mg 7 ? ? ? ? test methods are referenced to mil-std-883 as determined by mil-prf-38534. notes: 1. redmond site, interpoint brand, has a dscc approved radiation hardness assurance plan. our smd products with rha p or r code met dscc requirements. 2. space prototypes are non-qml products and may not meet all of the requirements of mil-prf-38534. o in the rha designator position in interpoint model numbers indicates dscc rha - defined as no rha. 3. all processes are qml qualified and performed by certified operators. 4. not required by dscc but performed to assure product quality. 5. burn-in temperature designed to bring the case temperature to +125c minimum. 6. includes low dose rate to the rated total dose (tid) 7. no upset at the pins. crane aerospace & electronics power solutions smtr single, dual and triple, smtr rev g - 2011.05.04. this revision supersedes all previous releases. all technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. crane electronics, inc. reserves the right to make changes in products or speci - fications without notice. smtr series is a trademark of crane electronics, inc. copyright ? 1999 - 2011 crane electronics, inc. all rights reserved. www.craneae.com/interpoint page 20 of 20 smtr single, dual and triple dc/dc converters 28 v olt input C 30 watt

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