models vdc o utput b4-39 size (max.): 2.720 x 1.350 x 0.505 inches (69.09 x 34.29 x 12.83 mm) see section b8, case j5, for dimensions. weight: 60 grams max. screening: standard only. see section c2 for screening description. f eatures ?0 to +85? operation 18 to 36 vdc input (19 to 36 vdc input hr301-2805) fully isolated optocoupler feedback fixed frequency, 240 to 300 khz typical topology ?push-pull forward 50 v for up to 50 ms transient protection inhibit function indefinite short circuit protection remote sense on hr301-2805 model up to 86% efficiency single 5 12 15 dual ? 2 ? 5 description hr300 series dc/dc 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 mall s ize and r eliability hr300 dc/dc converters use thick-film hybrid manufacturing tech- niques for smaller size, lighter weight and higher reliability than converters produced with other circuit techniques. with a footprint of less than 3.7 square inches and a 0.5 inch height, the hr300 converters reach power densities up to 22 watts per cubic inch. the hr300 parts use the same manufacturing procedures and quality controls that interpoint applies to converters built for aero- space and military applications. the converters are hermetically sealed in metal packages that are guaranteed a maximum leak rate of less than 10 -3 atm-cc/sec. h igh p erformance hr300 converters use a constant frequency pulse-width modulated switching regulator design operating in the forward mode with a clock switching frequency of 240 to 300 khz. isolation is achieved through the use of a transformer in the forward power circuit and an optocoupler in the feedback control loop. the full load output power of 30 watts is available over the entire 18 to 36 vdc input range (19 to 36 hr301-2805). on dual output models, up to 90% of full power is available from either output up to a combined total of 30 watts. the hr300 s high efficiency is maintained over the entire input voltage range and from approximately 25% of full load to full load (see typical efficiency curves). short circuit protection is provided through foldback current limiting. when the output current reaches approximately 125% of the full rated load, the output voltage begins to reduce to protect the converter. the converter can sustain a true short circuit condition indefinitely. the hr300 s flanged case facilitates removal of heat and provides for mechanically secure mounting. if full power opera- tion or indefinite short circuit protection is a system requirement, the hr300 converter should be mounted with an efficient heat sink in contact with the mounting flange. internal filters in all hr300 converters provide low noise on both the input and outputs. on hr301 models, two-section l-c filters limit output ripple voltage and reflected input ripple current. on hr302 models, single-section l-c filters perform the same function. for maximum output regulation, the hr301-2805 is provided with external output voltage remote sense pins. connecting the remote sense pins to the load provides a four-terminal voltage mode which eliminates the adverse effects of line resistance voltage drops. remote sense pins may be left unconnected, but see cautions in this data sheet. for normal operation, remote sense pins should be connected to the respective output pins. i nhibit f unction an inhibit is provided to allow a logic input to shut down the converter. an open circuit on the inhibit pin (pin 2 or 8) allows normal operation. a connection between the inhibit pin and the input common (pin 10) disables the internal oscillator, shutting down the output. the inhibit pin has an open circuit voltage of 11 to 16 v on single output models, 8 to 12 v on hr302-2812 and 10 to 14 v on HR302-2815. in the inhibit mode, approximately 1 ma must be sunk from the inhibit pin. an active low open collector is required to acti- vate the inhibit function. dc/dc c onverters 28 v olt i nput hr300 series 30 watt
typical characteristics inhibit recommended operating conditions absolute maximum ratings input voltage 18 to 36 vdc (19 to 36 vdc hr301-2805) output power 30 watts lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +125? b4-40 hr300 series 30 watt dc/dc c onverters output voltage temperature coefficient 100 ppm/? typical input to output capacitance 80 pf typical single output models 70 pf typical hr302-2812 60 pf typical HR302-2815 current limit 125% of full load, typical isolation 100 megohm minimum at 500 v conversion frequency 240 to 300 khz inhibit pin voltage (unit enabled) 11 to 16 v single output models 8 to 12 v hr302-2812 ?10 to 14 v HR302-2815 input voltage range 18 to 36 vdc continuous 19 to 36 vdc hr301-2805 50 v for 50 msec transient case operating temperature (tc) ?0? to +85? full power inhibit ttl open collector logic low (output disabled) inhibit pin current 1 ma typical referenced to input common logic high (output enabled) open collector electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. single output models hr301-2805 hr301-2812 hr301-2815 parameter conditions min typ max min typ max min typ max units output voltage 4.95 5.0 5.05 11.88 12 12.12 14.85 15 15.15 vdc output current 6.0 2.5 2.0 a output power ?0? to +85? 30.0 30.0 30.0 w output ripple bw 2 mhz 30 60 30 70 30 75 mv p-p line regulation 1 min. to max. v in 7 25 10 40 10 40 mv load regulation 2 no load to full 5 25 10 40 10 40 mv input voltage no load to full 19 28 36 18 28 36 18 28 36 vdc ?0? to +85? transient 50 ms 50 50 50 input current no load 15 20 20 35 20 35 full load 1370 1400 1400 ma inhibited 15 22 22 input ripple current bw 2 mhz 5 15 10 25 10 25 ma p-p efficiency 79 82 80 84 82 86 % start-up delay 2 ?5 30 40 ms overshoot 500 1200 1500 mv notes 1. for hr301-2805, with the remote sense pins connected to the load and no resistance between the output pins and load. 2. a low output impedance power source is required on the input to realize this start-up time. if less than full surge current is available, start-up time will be longer caution permanent damage to the hr301-2805 will result if pin 6 is shorted to ground. damage may also result if pin 4 or pin 5 is disco nnected from the load during operation with the remote sense leads connected to the load. if remote sense pins are not connected to the load, the out put voltage of the hr301-2805 will rise to approximately 6.2 vdc measured across pins 4 and 5.
pin out b4-41 hr300 series 30 watt dc/dc c onverters triple output models hr302-2812 HR302-2815 parameter condition min typ max min typ max units output voltage +v out 11.88 12.0 12.12 14.85 15.0 15.15 vdc ?v out 11.88 12.0 12.12 14.85 15.0 15.15 output current 1 2.5 2.0 a output power 1 ?0? to +85? 30.0 30.0 w output ripple voltage bw 2 mhz 50 90 50 90 mv p-p line regulation v in = 18 to 36 10 30 10 40 mv load regulation no load to full 20 60 20 60 mv cross regulation 2 +v out 2.5 3.5 2.2 3.2 % ?v out 2.5 3.5 2.2 3.2 input voltage continuous 18 28 36 18 28 36 vdc ?0? to +85? transient 50 ms 50 50 input current no load 35 50 45 60 full load 1350 1400 ma inhibited 24 24 input ripple current bw 2 mhz 15 60 15 60 ma p-p efficiency 80 84 81 85 % start-up delay 3 ?0 60 ms overshoot 1500 1500 mv electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. notes 1. up to 90% of full power is available from either output providing the total power does not exceed 30 watts. 2. the effect on the output voltage of either output (held at 3 watts) when the other output is varied from 3 to 27 watts. 3. a low output impedance power source is required on the input to realize this start-up time. if less than full surge current is available, start-up time will be longer pin hr301-2805 single output dual output 1 positive input positive input positive input 2 inhibit inhibit no connection 3 sense return no connection positive output 4 output common output common output common 5 positive output positive output negative output 6 positive sense no connection no connection 7 case ground case ground case ground 8 no connection no connection inhibit 9 no connection no connection input common 10 input common input common input common bottom view hr300 squared corner and dot on top of cover indicate pin one. 10 9 8 7 6 12345 f igure 1: p in o ut see section b8, case j5, for dimensions. hr30 2 - 28 12 base model input voltage output voltage number of outputs (1 = single, 2 = dual) model numbering key
b4-42 hr300 series 30 watt dc/dc c onverters typical performance curves: 25? tc f igure 5 f igure 7 output power (watts) HR302-2815 efficiency efficiency (%) 72 84 82 80 76 74 15 510 78 86 18 v 36 v 20 25 30 68 70 88 28 v output power (watts) hr302-2812 and HR302-2815 low line dropout inupt voltage (volts) 15 17 15 510 16 20 25 30 14 18 HR302-2815 hr302-2812 output power (watts) hr301-2805 efficiency efficiency (%) 72 84 82 80 76 74 15 510 78 86 28 v 19 v 36 v 20 25 30 68 70 88 f igure 2 output power (watts) hr301-2812 efficiency efficiency (%) 72 84 82 80 76 74 15 510 78 86 28 v 18 v 36 v 20 25 30 68 70 88 f igure 3 output power (watts) hr301-2812 and hr301-2815 low line dropout input voltage (volts) 15 17 15 510 16 20 25 30 14 18 hr301-2815 hr301-2812 f igure 6 f igure 4 output power (watts) hr302-2812 efficiency efficiency (%) 72 84 82 80 76 74 15 510 78 86 20 25 30 68 70 88 28 v 18 v 36 v 24421-009-dts rev a dq# 2009 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. hr300 series is a trademark of interpoint. copyright 1991 - 1999 interpoint. all rights reserved.
b8-22 case j c ases materials header case j1 cold rolled steel/nickel/gold cases j2 - j5 cold rolled steel/nickel/tin cover case j1 kovar/nickel case j2 - j5 cold rolled steel/nickel/tin pins #52 alloy (all cases) case j1 mhv series triple ?compression glass seal mtr series triple ?ceramic seal cases j2 - j5 compression glass 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 case j bottom view see figures 36 - 40 for pin configuration 1.350 max (34.29) 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. flange thickness: cases j1 and j5 0.060 (1.52) case j2 0.073 (1.85) max cases j3 and j4 0.067 +0.005/-0.007 (1.70 +0.13/-0.8) 2.720 max (69.09) dot on top of case indicates pin one f igure 35: c ase j m aximum d imensions note: although every effort has been made to render the case drawings at actual size, variations in the printing process may ca use some distortion. please refer to the numerical dimensions for accuracy.
b8-25 case j c ases 0.040 dia. (1.02) 0.000 0.25 (6.4) 543 0.000 0.170 (4.32) 0.210 (5.33) 1.370 (34.80) 1.770 (44.96) 1.980 (50.29) 12 0.173 (4.39) 0.000 1.173 (29.79 0.673 (17.09) 0.162 dia (4.11) flanged cases: designator required in case option position of model number. fmd28-461 emi filter (down-leaded): screening ?standard or es bottom view case j4 solder seal solder tip-off 0.505 max (12.83) squared corner and dot on top of case indicate pin one. f igure 39: c ase j4 0.040 dia. (1.02) 0.000 0.25 (6.4) 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) 1.980 (50.29) 12345 0.173 (4.39) 0.000 1.173 (29.79 0.673 (17.09) 0.162 dia (4.11) flanged cases: designator required in case option position of model number for mhl series and mto series only. mhl series, mto series, mtw series: screening ?standard or es hr300 series: no screening options bottom view case j5 solder seal solder tip-off 0.505 max (12.83) squared corner and dot on top of case indicate pin one. f igure 40: c ase j5
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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