features ? C40c to + 85c operation ? 19 to 40 vdc input ? 50 v for 50 ms transient protection ? fully isolated ? fixed frequency ? remote sense on single models ? inhibit/sync function ? indefinite short circuit protection ? up to 84% efficiency size (max.): 3.20 x 2.46 x 0.595 inches (81.3 x 62.5 x 15.11 mm) see case l for dimensions. weight: 140 grams typical screening: standard only. see screening table for more information. description HR700 series dc/dc converters offer up to 70 watts of power from single, dual, or triple outputs in one package. the converters combine the small size and high reliability of hybrid-based components, the high efficiency of switching regulators, and the isolation, regulation, and low noise characteristics of linear regulators. s m a l l s i z e the HR700 converters are manufactured using techniques that provide very small size and low profile components. each converter uses less than eight square inches of board areas and is 0.595 inches high or less. the overall power density is 20 watts per cubic inch. h i g h r e l i a b i l i t y assembled using thick-film technology, the HR700 parts use the same manufacturing procedures and quality controls that we apply to converters designed for commercial airliners, the space shuttle, advanced fighter aircraft, and other high reliability applications. the steel cases are hermetically sealed in a dry nitrogen environment and are guaranteed a maximum leak rate of less than 10 -3 atm-cc/sec. all devices are 100% electrically tested. h i g h p e r f o r m a n c e the HR700 series parts are high efficiency, low noise, pulse-width modulated converters which use a quasi-square wave forward converter design with a nominal switching frequency of 245 khz. isolation between input an output is provided with a transformer in the forward power loop and a wide band, temperature insensitive, optical link in the feedback control loop. short circuit protection is provided by detecting peak primary switching current on a cycle basis and limiting it to approximately 130% of the full load input current. this method results in quick and positive current limiting under short circuit conditions. HR700 series dc/dc converters are designed to provide full power operation over the input voltage range of 19 to 40 vdc. operation below an input of 19 volts is possible with derated output power. outputs are available as 5, 12, and 15 vdc single, dual and triple outputs. the converters typically provide greater than 80% efficiency over the entire input range. line regulation is typically within 0.1% and load regulation within 0.2%. l o w n o i s e the HR700 series converters offer low noise on both the input and output lines. a two section, four pole, lc input filter is included to provide very low reflected line ripple current. output ripple is main- tained at less than 50 mv p-p for single and dual models and 85 mv p-p for triple output models. inhibit / s y n c f e a t u r e an inhibit/sync pin is standard on all models of the HR700 series converters. the pin serves as both an output inhibit and as a synchro- nization input. in the inhibit mode an open collector ttl compatible low (<0.8 v) will disable internal switching thereby inhibiting the units output. inhibiting in this manner results in an extremely low quiescent current. models vdc o u t p u t d u a l 12 15 triple +5 & 12 +5 & 15 HR700 series 70 watt dc/dc c o n v e r t e r s 28 v o l t i n p u t not recommended for new designs page 1 of 7 HR700 rev c - 20100212 crane aerospace & electronics electronics group (interpoint brand) po box 97005 ? redmond wa 98073-9705 425.882.3100 ? power@crane-eg.com www.interpoint.com
sync and inhibit derating output power/c urrent and input voltage recommended o perating conditions abso lute maximum ratings typical characteristics output power ? 60 to 70 watts depending on model lead s oldering t emperature (10 sec per lead) ? 300c storage temperature r ange (case) ? C55c to +125c o utput voltage temperature coefficient ? 150 ppm/c, typical i nput to output capacitance ? 160 pf, typical isolation ? 100 megohm minimum at 500 v c onversion frequency ? free run mode 245 khz, typical inhibit p in voltage (unit enabled) ? 4.5 to 5.5 v sync i n (245 to 370 khz.) ? duty cycle 70% min, 98% max. ? logic low 0.8v max ? logic high 4.5 v min ? referenced to input common ? if sync is not used, leave unconnected inhibit ttl open collector ? logic low (output disabled) inhibit pin current 1 ma max ? referenced to input common ? logic high (output enabled) v = 4.5v t emperatures are referenced to the temperature at the converters base- plate ? linearly derate output power/current from 100% at 85c to 0% at 125c. ? above 105c linearly derate steady state input voltage to 33 volts at 125c. ? indefinite short circuit protection is not guaranteed above 85c case. ? operation below an input voltage of 19 volts, including operation in mil- std-704e emergency power conditions, is possible with derated output power. see figures 10 and 11. i nput voltage range ? 19 to 40 vdc continuous (see derating) case operating t emperature (tc) ? C40c to +85c full power HR700 series 70 watt dc/dc c o n v e r t e r s page 2 of 7 HR700 rev c - 20100212 www.interpoint.com
electrical characteristics: 25c tc, 28 vdc vin, 100% load, free run, unless otherwise specified. notes 1. on dual output models the maximum combined output power is 70 watts. a maximum of 95% (66.5 w) is available from any single output. 2. on triple output models the maximum combined output power is 60 watts. a maximum of 50 watts is available from a single output. 3. balanced loads 4. regulation effect on the negative dual output during the defined conditions. 5. regulation effect on both dual outputs during the defined conditions. dual and triple output models hr702-2812 hr702-2815 hr703-28512 hr703-28515 units parameter conditions min typ max min typ max min typ max min typ ma x o u t p u t v o l t a g e f u l l l o a d m a i n 11.75 12 12.25 14.75 15 15.25 4.90 5.05 5.15 11.50 11.80 12.10 4.90 4.95 5.10 15.05 15.30 15.75 vdc d u a l o u t p u t c u r r e n t 1,2 v in = 19 t o 40 m a i n 2.92 5.5 2.33 4.4 4.0 10.0 1.67 4.2 4.0 10.0 1.33 3.33 a d u a l o u t p u t p o w e r 1,2 m a i n 35 66.5 70 35 66.5 70 20 50 20 50 60 20 50 20 50 60 w d u a l t o t a l o u t p u t r i p p l e f u l l l o a d b w 2 mhz m a i n 30 100 30 100 50 100 50 100 50 100 50 100 mv p-p d u a l l i n e r e g u l a t i o n v in = 19 t o 40 m a i n 10 30 10 30 2 25 100 225 2 25 100 225 mv d u a l l o a d r e g u l a t i o n 3 n o l o a d t o f u l l m a i n 25 50 25 50 5 30 300 600 5 30 300 600 mv d u a l c r o s s r e g u l a t i o n 4 d u a l + p o = 3 w t o 35 w - p o = 35 w 1.5 3.0 2.0 4.0 1.5 3.0 2.0 3.5 % + p o = 20 w t o 50 w - p o = 50 w t o 20 w c r o s s r e g u l a t i o n 5 m a i n + p o = 33 w d u a l + p o = 3 w t o 27 w - p o = 27 w t o 3 w 2.3 6.0 5.4 9.0 2.3 5.0 5.0 7.0 % m a i n + p o = 3 w t o 30 w d u a l p o = 15 w i n p u t v o l t a g e 19 28 40 19 28 40 19 28 40 19 28 40 vdc i n p u t c u r r e n t n o l o a d 75 100 25 35 75 100 25 35 85 115 30 35 85 115 30 35 ma inhibite d i n p u t r e f l . r i p p l e f u l l l o a d b w 10 m hz 15 50 15 50 15 50 15 50 ma p-p e f f i c i e n c y 80 83 80 83 79 84 79 84 % s t a r t u p d e l a y 15 25 15 25 6 10 6 10 ms HR700 series 70 watt dc/dc c o n v e r t e r s page 3 of 7 HR700 rev c - 20100212 www.interpoint.com
thermal management c a l c u l a t i n g m a x i m u m a m b i e n t t e m p e r a t u r e the HR700 series of dc/dc converters has an upper operating temperature of + 85c at the baseplate of the case. the degree of heat sinking required to remain within this limit may be determined from figure 1 which shows the maximum allowed internal power dissi- pation (p diss vs. ambient temperature for various heat sink thermal resistances. p diss may be calculated as: p diss = p out / efficiency C p out the efficiency for all combinations of pout and vin for the various models may be obtained from the graphs on the preceding pages. example: converter = hr702-2815, t amb = 70c, v in = 28 vdc, p out = 45 watts efficiency = 85% (from figure 7) p diss = (45 / 85) C 45 = 7.95 watts from figure 1 we can see that this situation will require thermal resis- tance of approximately 4.5c / watt. conversely we may also find the maximum ambient temperature which can be tolerated if we know the heat sink thermal resistance. example: converter = hr701-2805, vin = 28 vdc, p out = 45 w. thermal resistance = 3c / watt. efficiency = 83.5% (from figure 3) p diss = (45 / 0.835) C 45 = 8.89 watts. from figure 1 we can see that the maximum allowed am bient temper- ature is ap prox imately 75c. h e a t s i n k r e c o m m e n d a t i o n s an mfw series converter in still air (other than convective currents) and with no conductive cooling paths other than through electrical connections at the pins will exhibit a thermal resistance of approxi - mately 4c / watt. in cases where this value proves to be too high it is recommended that additional heat sinking be supplied. the simplest method of accomplishing this is to firmly attach the converter to a pcb thereby providing a conductive thermal path. secondly it is recom- mended that airflow be provided over the converter. although each situation requires a thorough thermal analysis these two measures can reduce the thermal resistance to as low as 2c / watt. if calcula - tions indicate further heat sinking is required it is recommended that additional thermal mass be provided either under the base plate or on top of the converters mounting flanges or both. degrees centigrade watts 20 40 60 80 100 120 140 20 15 10 5 u=4 c/ w u= 3 c/w u= 2c/ w u=0 c/ w internal power dissipation (max) vs. ambient t emperature f i g u r e 1 pin out f i g u r e 2: p in o u t see case l for dimensions. 1 positive input positive input 2 case ground case ground 3 input common input common 4 inhibit/sync in inhibit/sync in 5 negative output neg. aux. output 6 positive output positive aux. output 7, 8 output common output common 9, 10 no connection main (+5) output squared corner indicates pin one. bottom view mfw 12 34 5 6 7 8 9 10 HR700 series 70 watt dc/dc c o n v e r t e r s page 4 of 7 HR700 rev c - 20100212 www.interpoint.com
typical performance curves: 25c tc , 28 vdc vin, 100% load, free run, unless otherwise specified. f i g u r e 3 output power (watts) hr702-2812 efficiency vs. line & load efficiency (%) 10 20 30 40 50 60 70 87 85 83 81 79 77 75 73 71 40 v 28 v 19 v f i g u r e 5 output power (watts) hr703-28512 efficiency vs. line & load efficiency (%) 10 20 30 40 50 60 70 87 85 83 81 79 77 75 73 71 40 v 28 v 19 v output power (watts) hr702-2815 efficiency vs. line & load efficiency (%) 10 20 30 40 50 60 70 87 85 83 81 79 77 75 73 71 40 v 28 v 19 v f i g u r e 4 figure 9 output power (watts) hr703-28515 efficiency vs. line & load efficiency (%) 10 20 30 40 50 60 70 87 85 83 81 79 77 75 73 71 40 v 28 v 19 v f i g u r e 6 output power (watts) low line dropout vs load (50mv drop) input voltage (volts) 15 10 20 30 40 50 60 70 16 17 18 hr701-2815 hr701-2812 hr701-2815 f i g u r e 7 f i g u r e 8 output power (watts) low line dropout vs load (50mv drop) input voltage (volts) 15 10 20 30 40 50 60 70 16 17 18 19 hr702-2815 hr702-2812 hr703-28512 hr703-28515 mo del numbering key hr70 2 - 28 12 base model input voltage output voltage number of outputs (2 = dual, 3 = triple) (main and aux. vout for triple models) HR700 series 70 watt dc/dc c o n v e r t e r s page 5 of 7 HR700 rev c - 20100212 www.interpoint.com
solder seal solder t ip-of f 2.850 (72.39) 0.550 (13.97) 1.600 (40.64) 0.350 (8.89) 0.000 0.00 0.000 0.180 (4.57) 0.040 +0.007/-0.000 (1.02 +0.18/-0.00) 0.595 max (15. 11) 0.250 +0.05/-0.00 (6.35 +1.3/-0.0) 0.625 (15.88 ) 0.825 (20.96) 1.025 (26.04) 1.325 (33.66 ) 1.425 (36.20) 1.625 (41.28) 2.280 (57.91) .0.040 +0.005/-0.002 (1.02 +0.13/-0.05) bott om view 12 34 5 6 7 8 9 10 squared corner indicates pin one case l 0.141 dia. x 6 (3.58) 2.460 max (62.50) 3.20 max (81.3) case dimensions in inches (mm) to lerance 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 pi n materials header cold rolled steel/nickel/t in cover cold rolled steel/nickel/t in pins #52 alloy pins 1-4, and 9-10 #52 alloy with copper core pins 5-8, ceramic seal case l, rev c, 20060803 please refer to the numerical dimensions for accurac y. all information is believed to be accurate , but no responsibility is assumed for errors or omissions. interpoint reserves the right to make changes in products or specifications without notice . copyright ? 1999-2006 interpoint corp. all rights reserved. f i g u r e 9: c a s e l HR700 series 70 watt dc/dc c o n v e r t e r s page 6 of 7 HR700 rev c - 20100212 www.interpoint.com
hr i n d u s t r i a l (s t a n d a r d , n o n -qml) p r o d u c t s e n v i r o n m e n t a l s c r e e n i n g test performed hr industrial standard non-qml 1 pre-cap inspection method 2017, 2032 yes final electrical test mil-prf-38534, group a subgroups 1 and 4: +25c case yes hermeticity test gross leak, dip (1 x 10 -3 ) yes final visual inspection method 2009 yes test methods are referenced to mil-std-883 as determined by mil-prf-38534. notes: 1. standard, non-qml products, do not meet all of the requirements of mil-prf-38534. HR700 series 70 watt page 7 of 7 HR700 series dc/dc converter, HR700 rev c - 20100212. this revision supersedes all previous releases. all technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. interpoint reserves the right to make changes in products or specifications without notice. HR700 series is a trademark of interpoint. copyright ? 1999 - 2010 interpoint corporation. all rights reserved. www.interpoint.com
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