b4-33 HR700 series 70 watt f eatures ?0? to + 85? operation 19 to 40 vdc input fully isolated optocoupler feedback fixed frequency, 245 khz typical topology ?push-pull forward 50 v for up to 50 ms transient protection inhibit/sync function indefinite short circuit protection remote sense on single models up to 84% efficiency models vdc o utput single 5 12 15 dual ? 2 ? 5 triple +5 & 12 +5 & 15 dc/dc c onverters 28 v olt i nput size (max.): 3.20 x 2.46 x 0.595 inches (81.3 x 62.5 x 15.11 mm) see section b8, case l, for dimensions. weight: 140 grams typical screening: standard only. see section b9 for screening description. 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 compo- nents, the high efficiency of switching regulators, and the isolation, regulation, and low noise characteristics of linear regulators. small size 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. high reliability 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. high performance 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% effi- ciency over the entire input range. line regulation is typically within 0.1% and load regulation within 0.2%. low noise 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 / sync feature 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 synchronization input. in the inhibit mode an open collector ttl compatible low (<0.8 v) will disable internal switching thereby inhibiting the unit s output. inhibiting in this manner results in an extremely low quiescent current.
sync and inhibit b4-34 HR700 series 70 watt dc/dc c onverters derating output power/current and input voltage recommended operating conditions absolute maximum ratings typical characteristics single outputs hr701-2805 hr701-2812 hr701-2815 parameter condition min typ max min typ max min. typ max units output full load 4.90 5.00 5.10 11.75 12.00 12.25 14.75 15.00 15.25 vdc voltage output v in = 19 to 40 12.00 5.83 4.67 a current output tc = ?5? to +85? 60 70 70 w power output full load bw 2 mhz 30 100 30 100 30 100 mv p-p ripple line v in = 19 to 40 10 30 10 30 10 30 mv regulation load no load to full 10 30 10 30 10 30 mv regulation input voltage 19 28 40 19 28 40 19 28 40 vdc input no load 75 100 70 100 70 100 ma current inhibited 30 35 30 35 30 35 input refl. full load 10 50 10 50 10 50 ma p-p ripple bw 10 mhz efficiency 77 80 80 83 80 83 % startup with low 5 10 8 10 8 10 ms delay impedance source output power 60 to 70 watts depending on model lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +125? output voltage temperature coefficient 150 ppm/?, typical input to output capacitance 160 pf, typical isolation 100 megohm minimum at 500 v conversion frequency free run mode 245 khz, typical inhibit pin voltage (unit enabled) 4.5 to 5.5 v sync in (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 = 3 4.5v temperatures are referenced to the temperature at the converter s baseplate ?linearly derate output power/current from 100% at 85? to 0% at 125?. ?above 105? linearly derate steady state input voltage to 33 volts at 125?. ?indefinite short circuit protection is not guaranteed above 85? 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. electrical characteristics: 25? tc, 28 vdc vin, 100% load, free run, unless otherwise specified. input voltage range 19 to 40 vdc continuous (see derating) case operating temperature (tc) ?0? to +85? full power
b4-35 HR700 series 70 watt dc/dc c onverters dual and triple outputs hr702-2812 hr702-2815 hr703-28512 hr703-28515 parameter condition min typ max min typ max min typ max min typ max units output full main 4.90 5.05 5.15 4.90 4.95 5.10 voltage load dual 11.75 12.00 12.25 14.75 15.00 15.25 11.50 11.80 12.10 15.05 15.30 15.75 vdc output v in = main 4.0 10.0 4.0 10.0 a current 1, 2 19 to 40 dual 2.92 5.5 2.33 4.4 1.67 4.2 1.33 3.33 output main 20 50 20 50 power 1, 2 dual 35 66.5 35 66.5 20 50 20 50 w total 70 ?0 ?0 ?0 output full load main 50 100 50 100 mv p-p ripple bw 2 mhz dual 30 100 30 100 50 100 50 100 line v in = main 2 25 2 25 mv regulation 19 to 40 dual 10 30 10 30 100 225 100 225 load 3 no load main 5 30 5 30 mv regulation to full dual 25 50 25 50 480 750 300 600 cross 4 dual regulation +p o = 3 w to 35 w ? o = 35 w 1.5 3.0 1.5 3.0 +p o = 20 w to 50 w % % ? o = 50 w to 20 w 2.0 4.0 2.0 3.5 cross 5 main +p o = 30 w regulation dual +p o = 3 w to 27 w 2.3 6.0 2.3 5.0 ? o = 27 w to 3 w main % +p o = 3 w to 30 w dual p o = 15 w 5.4 9.0 5.0 7.0 input voltage 19 28 40 19 28 40 19 28 40 19 28 40 vdc input no load 75 100 75 100 85 115 60 115 ma current inhibited 25 35 25 35 30 35 30 35 input refl. full load 15 50 15 50 15 50 15 50 ma p-p ripple bw 10 mhz efficiency 80 83 80 83 79 84 79 84 % startup 15 25 15 25 6 10 6 10 ms delay electrical characteristics: 25? 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.
b4-36 HR700 series 70 watt dc/dc c onverters c alculating m aximum a mbient t emperature the HR700 series of dc/dc converters has an upper operating temperature of + 85? 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 dissipation (p diss vs. ambient temperature for various heat sink thermal resistances. p diss may be calculated as: p diss = p out / efficiency ?p out the efficiency for all combinations of p out and v in for the various models may be obtained from the graphs on the preceding pages. example: converter = hr702-2815, t amb = 70?, v in = 28 vdc, p out = 45 watts efficiency = 85% (from figure 7) p diss = (45 / 85) ?45 = 7.95 watts from figure 1 we can see that this situation will require thermal resistance of approximately 4.5? / 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, v in = 28 vdc, p out = 45 w. thermal resistance = 3? / watt. efficiency = 83.5% (from figure 3) p diss = (45 / 0.835) ?45 = 8.89 watts. from figure 1 we can see that the maximum allowed ambient temperature is approximately 75?. h eat s ink r ecommendations an HR700 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 approximately 4? / 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 recommended 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 2? / watt. if calculations 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 converter's mounting flanges or both. thermal management degrees centigrade watts 20 40 60 80 100 120 140 20 15 10 5 u=4 c/w u=3 c/w u=2 c/w u=0 c/w internal power dissipation (max) vs. ambient temperature f igure 1
b4-37 HR700 series 70 watt dc/dc c onverters pin out pin single output dual output triple output 1 positive input positive input positive input 2 case ground case ground case ground 3 input common input common input common 4 inhibit/sync in inhibit/sync in inhibit/sync in 5 negative sense negative output negative aux. output 6 positive sense positive output positive aux. output 7, 8 output common output common output common 9, 10 positive output no connection main (+5) output squared corner indicates pin one. bottom view HR700 12 3 4 5 6 7 8 9 10 f igure 2: p in o ut model numbering key hr70 2 - 28 12 base model input voltage output voltage number of outputs (1 = single, 2 = dual, 3 = triple) (main and aux. vout for triple models) see section b8, case l, for dimensions.
b4-38 HR700 series 70 watt dc/dc c onverters typical performance curves: 25? tc , 28 vdc vin, 100% load, free run, unless otherwise specified. f igure 6 f igure 8 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 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) hr701-2805 efficiency vs. line & load efficiency (%) 10 20 30 40 50 60 70 86 85 84 83 82 81 80 79 78 40 v 28 v 20 v f igure 3 output power (watts) hr701-2812 efficiency vs. line & load efficiency (%) 10 20 30 40 50 60 70 89 88 87 86 85 84 83 82 81 40 v 28 v 19 v f igure 4 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 igure 7 f igure 5 output power (watts) hr701-2815 efficiency vs. line & load efficiency (%) 10 20 30 40 50 60 70 89 88 87 86 85 84 83 82 81 40 v 28 v 19 v 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 igure 9 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 igure 10 f igure 11 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 20621-009-dts rev a dq# 2008 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 1992 - 1999 interpoint. all rights reserved.
b8-31 case l c ases 0.060 min (1.52) 0.060 min (1.52) 0.337 min (8.56) 0.337 min (8.56) 3.20 max (81.3) 2.46 max (62.5) materials header cold rolled steel/nickel/tin cover cold rolled steel/nickel/tin pins #52 alloy pins 1-4, and 9-10 #52 alloy with copper core pins 5-8 ceramic seal case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.2) 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 300 c for 10 seconds per pin. squared corner indicates pin one case l top view cover placement and min/max dimensions see figure 50 for pin configuration f igure 49: c ase l m aximum d imensions
b8-32 case l c ases solder seal solder tip-off 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) bottom view 12 3 4 5 6 7 8 9 10 squared corner indicates pin one mfw series: screening ?standard or es HR700 series: no screening options case l 0.141 x 6 (3.58) f igure 50: c ase l d imensions
c2-13 qa screening hr products hr p roducts test (hr products) standard pre-cap inspection method 2017 yes final electrical test mil-prf-38534, group a subgroups 1 and 4: +25? case yes hermeticity testing 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. HR700 series hr300 series hr150 series hr120 series hr40 series applies to the following products:
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