figure 1. simplified schematic * "d24" models only dual output bwr models miniature, 1" x 1" 5 watt, dc/dc converters features the migration to distributed power is accelerating. the critical need for accurate voltages, tight regulation and rapid transient response is propelling the move to power processing at the "point-of-use" with low-power dc/dc converters physically located right at their loads. datels miniature, full featured, 5 watt bwr models were specifically designed for todays demanding distributed power architectures in aerospace, marine, telecom and computer applications. the converters small size (1" x 1" x 0.45"), full 5 watt output capability and low cost give system architects unprecedented design and layout flexibility. occupying less than 0.5in 3 total volume, these extremely compact, fully regulated and isolated (1000vdc) modules are available with 5, 12 or 15 volt outputs. input voltage ranges are either 18-36 volts ("d24" models) or 36-72 volts ("d48" models). although their overall size is 50-75% smaller than many similarly rated power modules, these 1" x 1" bwr models are exact, drop-in, pin-for-pin replacements for many standard 2" x 1" and 2" x 2", 5 watt modules. they achieve their small size and low cost by exploiting a novel feedback approach that does not depend upon traditional optocoupler techniques. all models are 5-side shielded and have a non-conductive baseplate that permits pc-card runs to be placed beneath the package. units are assembled using high- speed automated smt techniques and are fully encapsulated with thermally conductive potting compound. every unit is electrically tested before and after encapsulation, 100% burned-in under full load, hi-pot tested, and final- electrical tested prior to shipment. every unit meets datels traditional high standards for quality and long-term reliability. Cv out +v out common + v in C v in pwm * datel, inc., 11 cabot boulevard, mansfield, ma 02048 (u.s.a.) tel: (508)339-3000, (800)233-2765 fax: (508)339-6356 email: datellit@mcimail.com innovation and ex c ell e n c e ? ? n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n small size, 1" x 1" x 0.45" full 5 watts output power no external components required drop-in replacements for many standard, 2" x 1" dc/dcs wide input voltage ranges: 18-36v or 36-72v standard output voltages: 5, 12, 15 volts guaranteed efficiencies to 80% fully regulated and isolated (1000vdc guaranteed) output overvoltage protection and current limiting C25 to +95 o c operating temperature shielded cases (5 sides) ul1950, csa 22.2 no. 234, and iec950 modifications and customs for oem's
output power (watts) ambient temperature (c) C25 0 35 40 45 50 55 60 65 70 75 80 85 90 9 5 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 metal case insulated base 0.040 0.002 dia. (1.016 0.051) 1.00 (25.40) 0.45 (11.43) 0.20 min. (5.08) 0.200 (5.08) 0.10 (2.54) 1.00 (25.40) 0.800 (20.32) 0.100 (2.54) 0.800 (20.32) 0.200 (5.08) 0.400 (10.16) 0.10 (2.54) bottom view 3 1 2 4 6 5 miniature, 5 watt dc/dc converters xwr series 2 pin 1 2 3 4 5 6 i/o connections function p4 +input Cinput +output common no pin Coutput notes: for "d24" models, the case is connected to pin 2 (Cv in ). for "d48" models, the case is connected to pin 1 (+v in ). case c7 nominal output voltages: 5, 12 or 15 volts maximum output current in ma from each output input voltage range: d24 = 18-36 volts (24v nominal) d48 = 36-72 volts (48v nominal) wide range input output configuration: b = bipolar 15 b wr 165 d48 -/ - 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. a balanced loads, 20% to 100% load. ? nominal line voltage, no-load/full-load conditions. performance specifications and ordering guide ripple/noise (mvp-p, max.) v out (volts) output package (case, pinout) efficiency (min.) regulation (max.) line v in nom. (volts) range (volts) model input i out (ma, max.) i in ? (ma, max.) load a bwr-5/500-d24 5 500 150 2% 2% 24 18-36 25/282 75% c7, p4 bwr-5/500-d48 5 500 120 2% 2% 48 36-72 25/141 75% c7, p4 bwr-12/210-d24 12 210 150 2% 2% 24 18-36 25/264 80% c7, p4 bwr-12/210-d48 12 210 150 2% 2% 48 36-72 25/133 80% c7, p4 bwr-15/165-d24 15 165 150 2% 2% 24 18-36 25/260 80% c7, p4 bwr-15/165-d48 15 165 150 2% 2% 48 36-72 25/130 80% c7, p4 part number structure mechanical specifications temperature derating
miniature, 5 watt dc/dc converters bwr models 3 floating outputs since these are isolated dc/dc converters, their outputs are "floating." any bwr model may be configured to produce an output of 10v, 24v or 30v (for 5v, 12v or 15v models, respectively) by applying the load across the +output and Coutput (pins 3 and 6), with either output grounded. the common (pin 4) should be left open. minimum 20% loading is recom- mended under these conditions. filtering and noise reduction all bwr 5 watt dc/dc converters achieve their rated ripple and noise specifications without the use of external input/output capacitors. in critical applications, input/output ripple and noise may be further reduced by installing low-esr, tantalum or electrolytic capacitors across the input and/or output terminals. output capacitors should be connected between their respective output pin (pin 3 or 6) and common (pin 4)as shown in figure 2. the capacitors should be located as close to the power converters as possible. typical values are listed below. in many applica- tions, using values greater than those listed will yield better results. to reduce input ripple "d24" models 20f, 50v "d48" models 10f, 100v to reduce output ripple 5v outputs 47f, 10v, low esr 12/15v outputs 33f, 20v, low esr in critical, space-sensitive applications, datel may be able to tailor the internal input/output filtering of these units to meet your specific require- ments. contact our applications engineering group for additional details. performance/functional specifications input input voltage range: "d24" models 18-36 volts (24v nominal) "d48" models 36-72 volts (48v nominal) input current see ordering guide input filter type lc on "d24" models c on "d48" models reverse-polarity protection yes (instantaneous, 6a maximum) output v out accuracy (50% load): 5v outputs 1.5%, maximum 12/15v outputs 1%, maximum temperature coefficient 0.02% per c ripple/noise (20mhz bw) see ordering guide line regulation see ordering guide load regulation see ordering guide efficiency see ordering guide isolation voltage a 1000vdc, minimum current limiting auto-recovery overvoltage protection zener/transorb clamps dynamic characteristics transient response (50% load step) 500sec max. to 1.5% of final value switching frequency 170khz (10khz) environmental operating temperature (ambient): ? without derating C25 to +60c with derating to +95c (see derating curve) storage temperature C55 to +125c physical dimensions 1" x 1" x 0.45" (25.4 x 25.4 x 11.4mm) shielding 5-sided case connection: "d24" models pin 2 (Cv in ) "d48" models pin 1 (+v in ) case material corrosion resistant steel with epoxy-based enamel finish pin material brass, solder coated weight 0.7 ounces (20 grams) typical @ t a = +25c under nominal line voltage and full-load conditions, unless noted. these power converters require a minimum 20% loading to maintain specified regulation. operation under no-load conditions will not damage these devices; however they may not meet all listed specifications. application-specific internal input/output filtering can be recommended and perhaps added internally on request. contact datel applications engineering for details. a units can be screened or modified for higher guaranteed isolation voltages. contact datel applications engineering for details. ? units can be screened for lower-temperature operation. contact datel applications engineering for details. input voltage: "d24" models 44 volts "d48" models 88 volts input reverse-polarity protection current must be <6a. brief duration only. fusing recommended. output overvoltage protection 5v outputs 6.8 volts, limited duration 12v outputs 15 volts, limited duration 15v outputs 18 volts, limited duration output current current limited. max. current and short-circuit duration are model dependent. storage temperature C55 to +125c 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 specifications table is not implied. absolute maximum ratings technical notes
4 miniature, 5 watt dc/dc converters xwr models typical performance curves (t a = +25c) the performance curves below were derived from actual test data for a single model number (bwr-15/165-d48). since all devices in this series have the same circuit topology, the performance curves are representative of all devices. efficiency vs. input voltage and output load load regulation line regulation 30.3 30.2 30.1 30.0 29.9 29.8 29.7 output voltage span (volts) in p ut volta g e ( volts ) 36 40 44 48 52 56 60 64 68 72 output voltage vs. input voltage (full-load conditions. nominal v out span = 30v) 85 84 83 82 81 80 79 36 42 48 54 60 66 7 2 efficiency (%) in p ut volta g e ( volts ) efficiency vs. input voltage (full-load conditions. guaranteed efficiency = 80% at v in = 48v ) 84 82 80 78 76 74 72 33 66 99 132 165 efficiency (%) output currents (ma) efficiency vs. output load (v in = nominal = 48v. guaranteed efficiency at full load = 80%) 15.20 15.15 15.10 15.05 15.00 14.95 14.90 14.85 14.80 35 55 75 95 115 135 155 17 5 output voltage (volts) Cv out out p ut current ( ma ) +v out Cv out output voltage vs. load (unbalanced) (v in = nominal = 24v. load on +v out fixed at 165ma) 30.3 30.2 30.1 30.0 29.9 29.8 29.7 output voltage span (volts) out p ut currents ( ma ) 35 45 55 65 75 85 95 105 115 125 135 145 155 165 output voltage vs. load (balanced) (v in = nominal = 48v. nominal v out span = 30v)
Coutput +input Cinput +output 1 2 3 6 common 4 c in c out c out + + + 5 if youre designing with emc in mind, please note that all of datels bwr 5 watt dc/dc converters have been characterized for radiated 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 specifications can be supplied upon request. radiated emissions plots to fcc and cispr 22 for model bwr-15/ 165-d48 appear below. its performance is typical of all models in the family. published emc test reports are available for each model number. contact datels applications engineering department for details. figure 2. using external capacitors to reduce input/output ripple/noise input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. for datel bwr 5 watt dc/dc converters, you should use slow-blow type fuses with values no greater than 0.5a. miniature, 5 watt dc/dc converters bwr models datels 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 ... well 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 industrial 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 80 70 60 50 40 30 20 10 0 C10 C20 fre q uenc y ( mhz ) 100 1000 radiated emissions fcc class b limit bwr-15/165-d48 radiated emissions fcc part 15 class b, 3 meters converter output = 15vdc @ 132ma radiated emissions (dbv/m) bwr-15/165-d48 radiated emissions en 55022 class b, 10 meters converter output = 15vdc @ 132ma 80 70 60 50 40 30 20 10 0 C10 C20 frequency (mhz) 100 1000 radiated emissions en 55022 class b limit radiated emissions (dbv/m)
6 ds0318 10/98 datel makes no representation that the use of its products in the circuits described herein, or the use of other technical info rmation contained herein, will not infringe upon existing or future patent rights. the descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. specifications are s ubject to change without notice. the datel logo is a registered datel, inc. trademark. datel (uk) ltd. tadley, england tel: (01256)-880444 datel s.a.r.l. montigny le bretonneux, france tel: 01-34-60-01-01 datel gmbh mnchen, germany tel: 89-544334-0 datel kk tokyo, japan tel: 3-3779-1031, osaka tel: 6-354-2025 datel, inc. 11 cabot boulevard, mansfield, ma 02048-1151 tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 email: datellit@mcimail.com data sheet fax back: (508) 261-2857 miniature, 5 watt dc/dc converters xwr series innovation and ex c ell e n c e ? ? iso 9001 i so 9001 registered
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