product overview it?s hard to beat the combination of low cost, small size (standard 2" x 1" x 0.375" package) proven reliability and outstanding electrical performance offered by the 7-10w, dual-output models of mps?s new a-series dc/dc converters. these highly ef? cient, rugged convert- ers combine straightforward circuit topologies, the newest components, proven smt-on-pcb construction methods, and highly repeatable automatic-assembly techniques. their superior durability is substantiated by a rigorous in-house quali? cation program that includes halt (highly accelerated life testing). the wide input voltage ranges of these a-series duals (4.7-7.25v for "d5a" models, 9-18v for "d12a" models and 18-75v for "d48a" models) make them excellent candidates for battery-powered systems or for distributed power architectures. their 5, 12 or 15 volt outputs cover virtually all standard applications. these popular power converters are fully isolated (1500vdc guaranteed) and display excel- lent line and load regulation (0.3% max. for line and 1% max. for load). they are completely i/o protected (input overvoltage shutdown and reverse-polarity protection, output current limit- ing and overvoltage protection) and contain input (pi type) and output ? ltering to reduce noise. they require no external components and offer true "plug-and-play" convenience. these extremely reliable, cost-effective power converters carry industry-standard pinouts making them ideal replacements for other more costly, less reliable power converters in com- puter, telecom/datacom, instrumentation and ate applications. they are an excellent choice for both new design-ins and upgrading older systems. figure 1. simpli ed schematic +v (1) (2) (3) (4) (5) in ? v in +v out ?v out common pwm controller opto isolation reference & error amp typical topology is shown. features ? ? low cost! highly reliable! ? ? proven smt-on-pcb construction ? ? qual tested; halt tested; emc tested ? ? designed to meet ul/en60950-1 ? ? output voltages: 5, 12 or 15 volts ? ? wide input voltage ranges: 4.7-7.25v, 9-18v or 18-75v ? ? small packages, 2" x 1" x 0.375" ? ? industry-standard pinouts ? ? fully isolated, 1500vdc guaranteed ? ? guaranteed ef? ciencies to 82% ? ? ?40 to +100c operating temperature ? ? modi? cations and customs for oem?s ? ? select models are rohs compliant bwr models 7-10w, dual output dc/dc converters mdc_bwr-7-10_d01 page 1 of 5 www.murata-ps.com www.murata-ps.com/support for full details go to www.murata-ps.com/rohs $
bwr-5/700-d5a 5 700 50 75 0.3% 1.0% 5 4.7-7.25 25/1772 76% 79% c2, p12 bwr-5/900-d12a* 5 900 75 100 0.3% 1.0% 12 9-18 25/930 81% 82% c2, p12 bwr-5/700-d48a* 5 700 50 100 0.3% 1.0% 48 18-75 15/180 79% 81% c2, p12 bwr-12/335-d5a 12 335 75 120 0.3% 1.0% 5 4.7-7.25 40/1846 76% 78% c2, p12 bwr-12/415-d12a* 12 415 100 120 0.3% 1.0% 12 9-18 20/986 83% 84% c2, p12 bwr-12/415-d48a* 12 415 75 120 0.3% 1.0% 48 18-75 15/249 80.5% 84% c2, p12 bwr-15/275-d5a 15 275 75 120 0.3% 1.0% 5 4.7-7.25 40/2089 75% 79% c2, p12 bwr-15/330-d12a* 15 330 75 120 0.15% 0.2% 12 9-18 25/980 83% 84% c2, p12 bwr-15/330-d48a* 15 330 75 120 0.3% 1.0% 48 18-75 15/250 80.5% 82.5% c2, p12 1 2 3 4 5 metal case insulated base 2.00 (50.80) 0.20 min (5.08) 1.00 (25.40) 0.400 (10.16) 0.800 (20.32) 0.800 (20.32) 0.375 (9.53) 0.040 0.002 dia. (1.016 0.051) bottom view 0.200 (5.08) 0.100 (2.54) 0.10 (2.54) 0.60 (15.24) dimensions are in inches (mm) case c2 notes: for "d5a" and "d12a"models, the case is connected to pin 2 (?v in ). for "d48a" models, the case is connected to pin 1 (+v in ). performance speci cations summary and ordering guide output input ? ? typical at t a = +25c under nominal line voltage and full-load conditions unless otherwise noted. ? ripple/noise (r/n) measured over a 20mhz bandwidth. ? balanced loads, 20% to 100% load. ? nominal line voltage, no-load/full-load conditions. input voltage range: d5 = 4.7-7.25 volts (5v nominal) d12 = 9-18 volts (12v nominal) d48 = 18-75 volts (48v nominal) nominal output voltages: 5, 12 or 15 volts maximum output current in ma from each output wide range input output con guration: b = bipolar a-series high reliability 15 b wr 330 d12 a - / - output power (w atts) ambient temperature ( c) 10 9 8 7 6 5 4 3 2 1 0 bwr-5/700-d5a e bwr-5/ 9 00-d12a c bwr-5/700-d48a f bwr-12 /335-d5a d bwr-12 /415-d 12a a bwr-12 /415-d 48a a bwr-15 /275-d5a d bwr-15 /330-d 12a a bwr-15 /330-d 48a b d d, e e, f ?40 0 40 45 50 55 60 65 70 75 80 85 9 0 9 5 10 0 a, b c b c f a r/n (mvp-p) ? regulation (max.) ef ciency package v out i out v in nom. range i in ? (case, model (volts) (ma) typ. max. line load ? (volts) (volts) (ma) min. typ. pinout) part number structure temperature derating mechanical specifications i/o connections pin function p12 1 +input 2 ?input 3 +output 4 common 5 ?output * magnetic feedback. c - rohs-6 compliance not all model combinations are available. contact murata power solutions. bwr models 7-10w, dual output dc/dc converters mdc_bwr-7-10_d01 page 2 of 5 www.murata-ps.com/support
technical notes floating outputs since these are isolated dc/dc converters, their outputs are "? oating." any bwr model may be con? gured to produce an output of 10v, 24v or 30v (for 5v, 12v or 15v models, respectively) by applying the load across the +output and ?output pins (pins 3 and 5), with either output grounded. the common pin (pin 4) should be left open. minimum 20% loading is recom- mended under these conditions. filtering and noise reduction all a-series bwr 7-10 watt dc/dc converters achieve their rated ripple and noise speci? cations without the use of external input/output capaci- tors. in critical applications, input/output ripple and noise may be further reduced by installing electrolytic capacitors across the input terminals and/ or low-esr tantalum or electrolytic capacitors across the output terminals. output capacitors should be connected between their respective output pin (pin 3 or 5) and common (pin 4) as shown in figure 2. the caps should be located as close to the power converters as possible. typical values are listed in the tables below. in many applications, using values greater than those listed will yield better results. to reduce input ripple "d5a" models 47f, 10v "d12a" models 20f, 35v "d48a" models 10f, 100v to reduce output ripple 5v output 47f, 10v, low esr 12/15v outputs 22f, 20v, low esr in critical, space-sensitive applications, mps may be able to tailor the internal input/output ? ltering of these units to meet your speci? c requirements. con- tact our applications engineering group for additional details. ? these power converters require a minimum 20% loading on each output to maintain speci? ed regulation. operation under no-load conditions will not damage these devices; however they may not meet all listed speci? cations. ? application-speci? c internal input/output ? ltering can be recommended or perhaps added internally upon request. contact mps applications engineering for details. ? devices can be screened or modi? ed for higher guaranteed isolation voltages. contact mps applications engineering for details. ? d5a models: zener/transorb only performance/functional speci cations typical @ t a = +25c under nominal line voltage and full-load conditions, unless noted. ? input input voltage range: d5a models 4.7-7.25 volts (5v nominal) d12a models 9-18 volts (12v nominal) d48a models 18-75 volts (48v nominal) input current see ordering guide input filter type ? pi reverse-polarity protection yes (instantaneous, 6a maximum) output v out accuracy (50% load): 5v outputs 1.5%, maximum 12/15v outputs 1%, maximum temperature coef cient 0.02% per c ripple/noise (20mhz bw) ? see ordering guide line/load regulation see ordering guide ef ciency see ordering guide isolation voltage ? 1500vdc, minimum (functional) isolation capacitance 200pf current limiting auto-recovery overvoltage protection ? zener/transorb clamps, magnetic feedback dynamic characteristics transient response (50% load step) 200sec max. to 1.5% of ? nal value switching frequency 165khz (15khz) environmental operating temperature (ambient): without derating ?40 to +65/70c (model dependent) with derating to +100c (see derating curves) storage temperature ?40 to +105c physical dimensions 2" x 1" x 0.375" (51 x 25 x 9.5mm) shielding 5-sided case connection: d5a and d12a models pin 2 (?v in ) d48a models pin 1 (+v in ) case material corrosion resistant steel with non-conductive, epoxy-based black enamel ? nish and palstic baseplate pin material rohs: gold-plated copper alloy with nickel underplate non-rohs: solder-coated brass weight 1.3 ounces (37 grams) flammability ul 94v-0 input voltage: d5 models 10 volts d12 models 20 volts d48 models 80volts input reverse-polarity protection current must be <6a. brief duration only. fusing recommended. output overvoltage protection 5v outputs 13 volts, limited duration 12v outputs 28 volts, limited duration 15v outputs 36 volts, limited duration output current current limited. max. current and short-circuit duration are model dependent. storage temperature ?40 to +105c lead temperature (soldering, 10 sec.) +300c these are stress ratings. exposure of devices to any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied. absolute maximum ratings bwr models 7-10w, dual output dc/dc converters mdc_bwr-7-10_d01 page 3 of 5 www.murata-ps.com/support
if you?re designing with emc in mind, please note that all of mps?s bwr 7-10 watt a-series dc/dc converters have been characterized for radi- ated and conducted emissions in our new emi/emc laboratory. testing is conducted in an emco 5305 gtem test cell utilizing emco automated emc test software. radiated emissions are tested to the limits of fcc part 15, class b and cispr 22 (en 55022), class b. correlation to other speci? ca- tions can be supplied upon request. radiated emissions plots to fcc and cispr 22 for model bwr-15/330-d48a appear below. published emc test reports are available for each model number. contact mps?s applications engineering department for more details. figure 2. using external capacitors to reduce input/output ripple/noise 1 2 3 5 4 c in c out c out + + + ?output +input ?input +output common input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. for mps a-series bwr 7-10 watt dc/dc converters, you should use slow-blow type fuses with values no greater than the following: v in range fuse value "d5a" 3a "d12a" 2a "d48a" 1a 8 0 70 60 50 40 3 0 20 10 0 ?10 ?20 fre q uenc y ( mhz ) 100 1000 fcc class b limit bwr-15/ 33 0-d48a radiated emi ss ion s fcc part 15 cla ss b, 3 meter s converter output = ?5vdc @ 3 00ma radiated emi ss ion s (db v/m) radiated emissions bwr-15/ 33 0-d48a radiated emi ss ion s en 55022 cla ss b, 10 meter s converter output = ?5vdc @ 3 00ma 8 0 70 60 50 40 3 0 20 10 0 ?10 ?20 frequency (mhz) 100 1000 radiated emissions en 55022 class b limit radiated emi ss ion s (db v/m) mps?s world-class design, development and manufacturing team stands ready to work with you to deliver the exact power converter you need for your demanding, large volume, oem applications. and ... we?ll do it on time and within budget! our experienced applications and design staffs; quick-turn prototype capability; highly automated, smt assembly facilities; and in-line spc quality-control techniques combine to give us the unique ability to design and deliver any quantity of power converters to the highest standards of quality and reliability. we have compiled a large library of dc/dc designs that are currently used in a variety of telecom, medical, computer, railway, aerospace and indus- trial applications. we may already have the converter you need. contact us. our goal is to provide you the highest-quality, most cost- effective power converters available. custom capabilities emi radiated emissions bwr models 7-10w, dual output dc/dc converters mdc_bwr-7-10_d01 page 4 of 5 www.murata-ps.com/support
quality and reliability the a-series are the ? rst dc/dc converters to emerge from mps?s new, company-wide approach to designing and manufacturing the most reliable power converters available. the ? ve-pronged program draws our quality assurance function into all aspects of new-product design, development, characterization, quali? cation and manufacturing. design for reliability design for reliability is woven throughout our multi-phased, new-product- development process. design-for-reliability practices are fully documented and begin early in the new-product development cycle with the following goals: 1. to work from an approved components/vendors list ensuring the use of reliable components and the rigorous quali? cation of new components. 2. to design with safety margins by adhering to a strict set of derating guidelines and performing theoretical worst-case analyses. 3. to locate potential design weaknesses early in the product-development cycle by using extensive halt (highly accelerated life testing). 4. to prove that early design improvements are effective by employing a thorough fraca (failure reporting analysis and corrective action) system. halt testing the goal of the accelerated-stress techniques used by mps is to force device maturity, in a short period of time, by exposing devices to excessive levels of "every stimulus of potential value." we use halt (highly acceler- ated life testing) repeatedly during the design and early manufacturing phases to detect potential electrical and mechanical design weaknesses that could result in possible future ? eld failures. during halt, prototype and pre-production dc/dc converters are sub- jected to progressively higher stress levels induced by thermal cycling, rate of temperature change, vibration, power cycling, product-speci? c stresses (such as dc voltage variation) and combined environments. the stresses are not meant to simulate ? eld environments but to expose any weaknesses in a product?s electro/mechanical design and/or assem- bly processes. the goal of halt is to make products fail so that device weaknesses can be analyzed and strengthened as appropriate. applied stresses are continually stepped up until products eventually fail. after corrective actions and/or design changes, stresses are stepped up again and the cycle is repeated until the "fundamental limit of the technology" is determined. mps has invested in a qualmark ovs-1 halt tester capable of applying voltage and temperature extremes as well as 6-axis, linear and rota- tional, random vibration. a typical halt pro? le (shown above) consists of thermal cycling (?55 to +125c, 30c/minute) and simultaneous, gradually increasing, random longitudinal and rotational vibration up to 20g?s with load cycling and applied-voltage extremes added as desired. many devices in mps?s new a-series could not be made to fail prior to reaching either the limits of the halt chamber or some previously known physical limit of the device. we also use the halt chamber and its ability to rapidly cool devices to verify their "cold-start" capabilities. quali cation for each new product, electrical performance is veri? ed via a comprehen- sive characterization process and long-term reliability is con? rmed via a rigorous quali? cation procedure. the qual procedure includes such strenu- ous tests as thermal shock and 500 hour life. qual testing is summarized below. in-line process controls and screening a combination of statistical sampling and 100% inspection techniques keeps our assembly line under constant control. parameters such as solder-paste thickness, component placement, cleanliness, etc. are statistically sampled, charted and ? ne tuned as necessary. visual inspections are performed by trained operators after pick-and-place, soldering and cleaning operations. units are 100% electrically tested prior to potting. all devices are tem- perature cycled, burned-in, hi-pot tested and ? nal-electrical tested prior to external visual examination, packing and shipping. rapid response to problems mps employs an outstanding corrective-action system to immediately address any detected shortcomings in either products or processes. when- ever our assembly, quality or engineering personnel spot a product/process problem, or if a product is returned with a potential defect, we immediately perform a detailed failure analysis and, if necessary, undertake corrective actions. over time, this system has helped re? ne our assembly operation to yield one of the lowest product defect rates in the industry. typical halt pro le quali cation test method/comments halt mps in-house procedure high temperature storage max. rated temp., 1,000 hours thermal shock 10 cycles, ?55 to +125c temperature/humidity +85c, 85% humidity, 48 hours lead integrity mps in-house procedure life test +70c, 500 hours* marking permanency mps in-house procedure end point electrical tests per product speci? cation quali cation testing * interim electrical test at 200 hours. 10 20 3 0 40 50 60 70 8 0 90 40 20 0 rand ib a t in ee a t u e et i e inu te 100 8 0 60 40 20 0 ?20 ?40 bwr models 7-10w, dual output dc/dc converters mdc_bwr-7-10_d01 page 5 of 5 www.murata-ps.com/support murata power solutions, inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. the descriptions contained her ein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci? cations are subject to cha nge without notice. ? 2013 murata power solutions, inc. murata power solutions, inc. 11 cabot boulevard, mans? eld, ma 02048-1151 u.s.a. iso 9001 and 14001 registered this product is subject to the following operating requirements and the life and safety critical application sales policy : refer to: http://www.murata-ps.com/requirements/
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