models vdc o utput 1 size (max.): 1.075 x 1.075 x 0.270 inches (27.31 x 27.31 x 6.86 mm) weight: 15 grams maximum. screening: standard, es, or 883 (class h). single 5 5.2 12 15 60 dual ? ? 2 ? 5 description the msa series of high frequency dc/dc converters offers a new standard of performance for low power, military/aerospace grade dc/dc converters. msa parts provide up to 5 watts output power over the full military temperature range with up to 76% efficiency. thick-film hybrid techniques provide military/aerospace reliability levels and optimum miniaturization. the hermetically sealed case is only 1.075 by 1.075 inches ?with a height of only 0.270 inches. power density for the msa series parts is 16 watts per cubic inch. the msa series small size, low height, and hermetically sealed metal enclosures make them ideal for use in military, aerospace and other high reliability applications. units are available with standard, screening, ?s? and fully compliant smd ?83?screening. see page 8 for screening options and descriptions. c onverter d esign the msa converters are switching regulators that use a flyback converter design with a constant switching frequency of 550 khz. they are regulated, isolated units using a pulse width modulated topology and built as high reliability thick-film hybrids. isolation between input and output circuits is provided with a transformer in the forward power path and an optical link in the feedback control loop. excellent input line transient response and audio rejection is achieved by an advanced feed-forward compensation technique. negative output regulation is maintained by tightly coupled magnetics. up to 4 watts, 80% of the total output power, is available from either output, provided that the opposite output is simultane- ously carrying 20% of the total power. each output must carry a minimum of 20% of the total output power in order to maintain spec- ified regulation on the negative output. predictable current limit is accomplished by direct monitoring of the output load current, which results in a constant current output above the overload point. internal input and output filters eliminate the need for external capacitors. w ide v oltage r ange the msa converters are designed to provide full power operation over a full 16 to 40 vdc voltage range. operation below 16 volts, including mil-std-704e emergency power conditions is possible with derated power. please refer to the low line dropout graphs (figures 17 and 18) for details. a low voltage lockout feature keeps the converter shutdown below approximately 13 vdc to ensure smooth initialization. i mproved d ynamic r esponse the msa feed-forward compensation system provides excellent dynamic response and noise rejection. audio rejection is typically 50 db. the minimum to maximum step line transient response is typi- cally less than 1%. i nhibit f unction msa converters provide a ttl open collector-compatible inhibit feature that can be used to disable internal switching and inhibit the unit s output. inhibiting in this manner results in low standby current, and no generation of switching noise. the converter is inhibited when the ttl compatible low ( 0.8 v) is applied to the inhibit pin. 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 v. in the inhibit mode, a maximum of 4 ma must be sunk from the inhibit pin. u ndervoltage l ockout and t ransient p rotection undervoltage lockout helps keep system current levels low during initialization or re-start operations. they can withstand short term transients of up to 50 volts without damage. dc/dc c onverters 28 v olt i nput msa series 5 watt f eatures ?5 to +125? operation 16 to 40 vdc input fully isolated optocoupler feedback fixed frequency, 550 khz typical (400 khz typ. 60 v output model) topology ?flyback 50 v for up to 50 ms transient protection inhibit function indefinite short circuit protection up to 76% efficiency, 16 w/in 3
recommended operating conditions typical characteristics inhibit absolute maximum ratings input voltage 16 to 40 v output power 5 watts lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +135? 2 msa series 5 watt dc/dc c onverters output voltage temperature coefficient 100 ppm/? typical input to output capacitance 50 pf typical isolation 100 megohm minimum at 500 v audio rejection 50 db typical conversion frequency 550 khz typical (400 khz 60 v model) 450 khz min, 600 khz max 350 khz min, 450 khz max 60 v model inhibit pin voltage (unit enabled) ? to 11 v input voltage range 16 to 40 vdc continuous 50 v for up to 50 msec transient case operating temperature (tc) ?5? to +125? full power ?5? to +135? absolute derating output power/current (tc) linearly from 100% at 125? to 0% at 135? electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. inhibit ttl open collector logic low (output disabled) logic low voltage 0.8 v max inhibit pin current 4 ma max referenced to input common logic high (output enabled) open collector notes 1. msa2860s specifications are at 25?c only, contact your interpoint representative for more information on over temperature specs. 2. line regulation for /es and non /es 2805s models at 16 to 17 v in and 110 ? to 125? (case) is 5% (max). 3. indefinite short circuit protection not guaranteed above 125? (case). 4. recovery time is measured from application of the transient to point at which v out is within 1% of v out at final value. 5. transition time >10 s. single output models msa2805s msa285r2s msa2812s msa2815s msa2860s 1 parameter conditions min typ max min typ max min typ max min typ max min typ max units output voltage tc = ?5? to +125? 4.95 5.00 5.05 5.15 5.20 5.25 11.88 12.00 12.12 14.85 15.00 15.15 59.1 60.00 60.9 vdc output current tc = ?5? to +125? v in = 16 to 40 vdc 0 1000 0 962 0 417 0 333 0 20 ma output power v in = 16 to 40 vdc tc = ?5? to +125? 5 5 5 5 1.2 w output ripple voltage 10 khz - 2 mhz 125 350 110 335 50 200 50 170 300 mv p-p line regulation v in = 16 to 40 vdc tc = ?5? to +125? 10 50 2 10 50 10 50 10 50 300 mv load regulation no load to full tc = ?5? to +125? 10 50 10 50 10 50 10 50 300 mv input voltage tc = ?5? to +125? no load to full continuous 16 28 40 16 28 40 16 28 40 16 28 40 16 28 40 vdc transient 50 ms 0 50 0 50 0 50 0 50 0 50 v input current no load 27 40 28 40 29 42 31 44 30 tc = ?5? to +125? full load 250 250 235 235 72 ma inhibited 3 5 3 5 3 5 3 5 3 5 input ripple 10 khz - 10 mhz 25 100 25 100 25 100 25 100 90 ma p-p current tc = ?5? to +125? 30 150 30 150 30 150 30 150 efficiency 66 71 66 71 70 76 71 76 70 75 % load fault 3, 4 power dissipation 1.5 2.0 1.5 2.0 1.2 1.9 1.2 1.8 w short circuit recovery 12.5 25 1.5 25 1 10 1 10 ms step load 50% - 100% - 50% response 4, 5 transient 100 250 100 250 150 375 200 500 mv pk recovery 100 250 100 250 200 500 200 500 s step line transient response 4, 5 16 to 40 v in 50 150 50 150 80 200 50 125 mv pk 40 to 16 v in 50 150 50 150 100 250 50 125 recovery 16 to 40 v in 100 250 100 250 250 625 250 625 ? 40 to 16 v in 200 500 200 500 250 625 250 625 start-up delay 10 25 10 25 3 10 3 10 ms overshoot 0 50 0 50 0 120 0 150 mv pk
3 msa series 5 watt dc/dc c onverters electrical characteristics: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. notes 1. up to 4 watts (80% of full power) is available from either output providing the opposite output is carrying 20% of total power. 2. shows regulation effect on the minus output during the defined cross loading conditions. see figures 15 and 16. 3. indefinite short circuit protection not guaranteed above 125? (case). 4. recovery time is measured from application of the transient to point at which v out is within 1% of v out at final value. 5. transition time >10 s. dual output models msa 2805d msa2812d msa2815d parameter conditions min typ max min typ max min typ max units output voltage +v out 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 vdc ? out 4.9 5.0 5.1 11.76 12.00 12.24 14.70 15.00 15.30 output current 1 v in = 16 to 40 vdc tc = ?5? to +125? 500 800 208 333 167 267 ma output power 1 v in = 16 to 40 vdc tc = ?5? to +125? 5 5 5 w output ripple volt. 10 khz - 2 mhz 150 40 140 60 150 mv p-p line regulation tc = ?5? to +125? vin = 16 to 40 vdc +v out 10 25 10 50 10 50 mv ? out 40 75 40 180 40 180 load regulation tc = ?5? to +125? no load to full +v out 10 50 10 50 10 50 mv ? out 50 200 50 200 50 200 cross regulation 2 +p o = 20 - 80 %, ? o = 80 - 20% ?020 8 15 715 ? o = 20 - 80 %, +p o = 80 - 20% % +p o = 50 - 10 %, ? o = 50% 5 8 3.7 6 3 6 ? o = 50 - 10 %, +p o = 50% input voltage no load to full tc = ?5? to +125 ?ontinuous 16 28 40 16 28 40 16 28 40 vdc transient 50 msec 50 50 50 v input current no load 30 35 33 58 38 60 tc = ?5? to +125? full load 248 235 235 ma inhibited 3 5 3 5 3 5 input ripple 10 khz to 10 mhz 25 80 25 100 25 100 current tc = ?5? to +125? 30 160 30 150 30 150 ma p-p efficiency 68 72 69 75 70 75 % load fault 3, 4 power dissipation short circuit 1.3 1.8 1.3 1.7 1.3 1.6 w recovery 50 1 10 1 10 ms step load 50% - 100% - 50% balanced response 4, 5 transient 150 300 750 300 750 mv recovery 100 200 500 500 1250 s step line resp. 4, 5 transient 16 to 40 vdc 750 50 125 150 375 40 to 16 vdc 500 50 125 100 250 mv pk recovery 16 to 40 vdc 1200 150 375 250 625 40 to 16 vdc 1200 400 1000 800 2000 ? start-up delay 25 3 10 3 10 ms overshoot 500 0 120 0 150 mv pk
model numbering key smd numbers pin out 4 msa series 5 watt dc/dc c onverters msa 28 12 d / 883 base model input voltage output voltage number of outputs (s = single, d = dual) (r = decimal point, 5r2 = 5.2 vout) screening (standard screening has no designator in this position.) pin single output dual output 1 positive output positive output 2 output common output common 3 no connection negative output 4 no connection no connection 5 inhibit inhibit 6 positive input positive input 7 input common input common 8 case ground case ground s tandard m icrocircuit d rawing (smd) 5962-9309201hxc in process 5962-9309301hxc 5962-9309401hxc 5962-0052201hxc 5962-9308901hxc 5962-9309001hxc msa s eries s imilar p art msa2805s/883 msa285r2s/883 msa2812s/883 msa2815s/883 msa2860s/883 msa2812d/883 msa2815d/883 for exact specifications for an smd product, refer to the smd drawing. call your interpoint representative for status on msa smd releases. 883 suffix indicates smd similar part. smds can be downloaded from: http://www.dscc.dla.mil/programs/smcr bottom view msa 876 5 4 3 2 1 squared corner and dot on top of package indicate pin one. f igure 1: p in o ut b ottom v iew see page 7 for dimensions.
5 msa series 5 watt dc/dc c onverters typical performance curves: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. f igure 5 f igure 7 output power (watts) msa2815d efficiency e f f ic ie n c y ( % ) 30 80 40v 70 60 50 40 123456 16v 28v 100 s/div 16v to 40v msa2805s step line response 2 0 m v /d iv . v in 2 0 v /d iv . v out output power (watts) msa2805s efficiency e f f ic ie n c y ( % ) 30 80 40v 70 60 50 40 123456 16v 28v f igure 2 output power (watts) msa2812s efficiency e f f ic ie n c y ( % ) 30 80 40v 70 60 50 40 123456 16v 28v f igure 3 frequency (khz) msa series audio rejection a t t e n u a t io n ( d b ) 100 0.1 1 10 100 90 80 70 60 50 40 30 20 10 f igure 6 f igure 4 output power (watts) msa2815s efficiency e f f ic ie n c y ( % ) 30 80 40v 70 60 50 40 123456 16v 28v f igure 11 f igure 13 200 s/div 16v to 40v msa2815d input step line response 1 0 0 m v /d iv . v in 2 0 v /d iv . +v out v out 200 s/div 10% 90% msa2815d +v o step load response 2 0 0 m v /d iv . 10% to 90% 90% to 10% p out =0.5w 100 s/div 50% 100% msa2805s step load response 5 0 m v /d iv . 50% to 100% 100% to 50% f igure 8 100 s/div 10% 100% msa2805s step load response 5 0 m v /d iv . 10% to 100% 100% to 10% f igure 9 100 s/div 10% 50%) msa2815d +v o step load response 1 0 0 m v /d iv . 10% to 50% 50% to 10% p out =2.5w f igure 12 f igure 10 1 ms / div msa2805s turn-on into no load 1 v /d iv . v in 2 0 v /d iv . v out
6 msa series 5 watt dc/dc c onverters typical performance curves: 25? tc, 28 vdc vin, 100% load, unless otherwise specified. f igure 17 output power (watts) 50 mv drop low line dropout vs. load in p u t v o l t a g e ( v o lts ) 12 17 16 15 14 13 123456 msa2805s msa2815s msa2812s 500 s/div msa2815d turn-on into no load 5 v /d iv . v in 2 0 v /d iv . +v out v out f igure 14 output load (+v out % / v out %) 90 10% load on +v, 10-90% load on v msa dual cross regulation v o u t v o l t a g e c h a n g e (% ) 10 0 10 90/10 70/30 50/50 30/70 10/90 8 6 4 2 2 4 6 8 2815d 2812d f igure 15 output power (watts) 50 mv drop low line dropout vs. load in p u t v o l t a g e ( v o lts ) 12 17 16 15 14 13 123456 msa2812d msa2815d f igure 18 f igure 16 output load (%) cond. a: 50% load +v; 10% to 50% v cond. b: 50% load v; 10% to 50% +v msa dual cross regulation v o u t v o l t a g e c h a n g e ( % ) 5 0 5 10 20 30 40 50 4 3 2 1 1 2 3 4 2815d 2812d 2812d cond b cond a
7 msa series 5 watt dc/dc c onverters case c bottom view see figure 20 for pin configurations. 1.075 max (27.31) materials header cold rolled steel/nickel/gold cover cold rolled steel/nickel pins copper/nickel/gold compression glass seal 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 1.075 max (27.31) 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. dot on top of case indicates pin one 0.000 0.132 (3.35) 0.932 (23.67) 0.000 0.132 (3.35) 876 5 4 3 2 1 0.332 (8.43) 0.532 (13.51) 0.732 (18.59) 0.932 (23.67) 0.025 (0.64) dia. 0.000 0.270 max. (6.86) msa series: screening standard, es, or 883 bottom view case c1 0.205 0.010 (5.21 0.25) 0.000 0.270 max. (6.86) 0.205 0.010 (5.21 0.25) projection weld seam seal squared corner and dot on top of case indicate pin one. f igure 20: c ase c1 f igure 19: c ase c 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.
8 msa series 5 watt dc/dc c onverters test (125 c products) standard /es /883 (class h)* pre-cap inspection method 2017, 2032 yes yes yes temperature cycle (10 times) method 1010, cond. c, -65 c to 150 c no no yes method 1010, cond. b, -55 c to 125 c no yes no constant acceleration method 2001, 3000 g no no yes method 2001, 500 g no yes no burn-in method 1015, 160 hours at 125 c no no yes 96 hours at 125 c case (typical) no yes no final electrical test mil-prf-38534, group a subgroups 1 through 6: -55 c, +25 c, +125 c no no yes subgroups 1 and 4: +25 c case yes yes no hermeticity testing fine leak, method 1014, cond. a no yes yes gross leak, method 1014, cond. c no yes yes gross leak, dip (1 x 10 -3 ) yes no no final visual inspection method 2009 yes yes yes test methods are referenced to mil-std-883 as determined by mil-prf-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over the full military temperature range of 55 c to +125 c. e nvironmental s creening 22021-001-dts rev c this revision supercedes 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. msa series is a trademark of interpoint. copyright ? 1994 - 2001 interpoint corporation. all rights reserved. contact information: interpoint headquarters usa phone: 1-800-822-8782 +425-882-3100 email: power@intp.com www.interpoint.com interpoint uk phone: +44-1252-815511 email: poweruk@intp.com interpoint france phone: +33-134285455 email: powerfr@intp.com
|
