single output a-series, uwr models high-reliability, 2" x 2" 14-20 watt, dc/dc converters figure 1. simplified schematic datel's new a-series switching dc/dc converters are designed to meet the demanding long-term-reliability and low-cost requirements of modern telecom, datacom, computer/networking and industrial-electronics applications. these highly- efficient, rugged devices combine straightforward circuit topologies, new components, proven smt-on-pcb construction methods, and highly repeatable automatic-assembly techniques. the flexibility of the designs and their assembly methods readily permit minor modifications to optimize performance for specific applications. the single-output, 14-20 watt models of the a-series deliver both high power densities and impressive mtbfs. their superior durability is substantiated by a rigorous in-house qualification program including halt (highly accelerated life testing), which is designed to detect any potential electrical, mechanical, or process weaknesses. packaged in standard, 2" x 2" x 0.45", shielded metal cases with non-conductive coatings, these fully isolated (1500vdc minimum) dc/dcs offer excellent line/load regulation, full i/o protection, thermal shutdown, and industry-standard pinouts. output voltages include 3.3, 5, 5.2, 12 or 15 volts. input voltage ranges are datel's traditional ultra-wide 9-36v and 18-75v, as well as 4.7-7.5v. each device provides remote on/off control and v out trim capability. all a-series uwr models are fully emi characterized and ul1950, csa 950 and iec 950 safety approved. a-series dc/dcs are extremely reliable, easy-to-use, cost-effective power converters. use them to improve the reliability of existing equipment or to develop new systems that exceed design objectives. common +v out +v in Cv in on/off control +v out trim reference & error amp opto isolation pwm controller datel, inc., mansfield, ma 02048 (usa) tel: (508)339-3000, (800)233-2765 fax: (508)339-6356 email: sales@datel.com internet: www.datel.com features low cost! highly reliable! proven smt-on-pcb construction qual tested; halt tested; emc tested designed to meet ul1950 and en60950 (basic insulation) mark available (75v-input models) output voltages: 3.3/5/5.2/12/15 volts ultra-wide input voltage ranges: 4.7-7.5v, 9-36v or 18-75v small packages, 2" x 2" x 0.45" industry-standard pinouts fully isolated, 1500vdc guaranteed guaranteed efficiencies to 84% C40 to +100c operating temperature modifications and customs for oems a- series innovation and ex c ell e n c e ? ?
2 function p6 +input Cinput no pin on/off control no pin +output common trim pin 1 2 3 4 5 6 7 8 i/o connections notes: for "d5a" and "d12a" models, the case is connected to pin 2 (Cv in ). for "d48a" and "d48e" models, the case is connected to pin 1 (+v in ). notes: 1. the uwr-3.3/4850-d48a (18-75v input, curve a) and uwr-3.3/4850-d12a (9-36v input, curve a) will derate curve aa if used over the limited input ranges of 20-60v or 10-30v, respectively. 2. "d48a" models (18-75v input ranges) that derate along curve b will derate along curve bb if used over the more limited input range of 24-60v. wide range input output configuration: u = unipolar nominal output voltage: 3.3, 5, 12 or 15 volts maximum output current in ma input voltage range: d5 = 4.7-7.5 volts (5v nominal) d12 = 9-36 volts (24v nominal) d48 = 18/36-75 volts (48v nominal) a-series high reliability 5 u wr 4000 d12 a - / - bottom view 1.800 (45.72) 0.10 (2.54) 2.00 (50.80) 8 5 6 7 0.40 (10.16) 0.200 (5.08) 0.400 (10.16) 0.100 (2.54) 1 2 4 metal case insulated base 0.040 0.002 dia. (1.016 0.051) 2.00 (50.80) 0.20 min (5.08) 0.45 (11.43) 1.200 (30.48) 3 eq. sp. @ 0.400 (10.16) 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 10% to 100% load. uwr-3.3/4250-d5a 3.3 4250 50 100 1.0% 1.0% 5 4.7-7.5 80/ 3720 76% 77% c4, p6 uwr-3.3/4850-d12a 3.3 4850 50 75 0.5% 1.0% 24 9-36 35/852 77% 79% c4, p6 uwr-3.3/4850-d48a 3.3 4850 50 100 1.0% 1.0% 48 18-75 15/419 79% 80% c4, p6 uwr-5/3000-d5a 5 3000 50 100 1.0% 1.0% 5 4.7-7.5 80/ 3800 78% 79% c4, p6 uwr-5/4000-d12a 5 4000 50 100 0.3% 0.5% 24 9-36 15/ 1020 81% 82% c4, p6 uwr-5/4000-d48a 5 4000 50 100 0.3% 0.5% 48 18-75 15/496 82% 84% c4, p6 uwr-5/4000-d48e ? 5 4000 50 100 0.3% 0.5% 48 36-75 15/484 84% 86% c4, p6 uwr-5.2/3000-d5a 5.2 3000 50 100 1.0% 1.0% 5 4.7-7.5 80/ 3900 79% 80% c4, p6 uwr-12/1250-d5a 12 1250 75 120 1.0% 1.0% 5 4.7-7.5 80/ 3660 80% 82% c4, p6 uwr-12/1650-d12a 12 1650 50 100 0.3% 0.5% 24 9-36 15/ 1000 79.5% 82.5% c4, p6 uwr-12/1650-d48a 12 1650 75 100 0.3% 0.5% 48 18-75 15/491 84% 85% c4, p6 uwr-15/1000-d5a 15 1000 75 150 1.0% 1.0% 5 4.7-7.5 80/ 3660 80% 82% c4, p6 uwr-15/1300-d12a 15 1300 50 100 0.3% 0.5% 24 9-36 20/967 84% 85% c4, p6 uwr-15/1300-d48a 15 1300 75 100 0.3% 0.5% 48 18-75 10/484 84% 86% c4, p6 performance specifications and ordering guide i out (ma) r/n (mvp-p) load a v out (volts) output package (case, pinout) efficiency regulation (max.) line v in nom. (volts) range (volts) model input i in ? (ma) max. typ. typ. min. ? nominal line voltage, no-load/full-load conditions. ? see technical notes for an explanation of trading off input voltage ranges for higher full-power operating temperature. part number structure mechanical specifications temperature derating output power (watts) ambient temperature (c) 20 18 16 14 12 10 8 6 4 2 0 uwr-3.3/4250-d5a f uwr-3.3/4850-d12a a uwr-3.3/4850-d48a a uwr-5/3000-d5a e uwr-5/4000-d12a c uwr-5/4000-d48a b uwr-5/4000-d48e g uwr-5.2/3000-d5a d uwr-12/1250-d5a e uwr-12/1650-d12a c uwr-12/1650-d48a b uwr-15/1000-d5a e uwr-15/1300-d12a c uwr-15/1300-d48a b C40 0 40 45 50 55 60 65 70 75 80 85 90 95 10 0 a aa bb, g c f e d d, e, f b bb g a series 14-20w, single output dc/dc converters case c4
input voltage: "d5a" models 11 volts "d12a" models 44 volts "d48a" and "d48e" models 88 volts input reverse-polarity protection current must be <10a. brief duration only. fusing recommended. output overvoltage protection: 3.3v outputs no protection 5v/5.2v 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 C40 to +105c lead temperature (soldering, 10 sec.) +300c 3 floating outputs since these are isolated dc/dc converters, their outputs are "floating." users may ground either the common (pin 7) for normal usage or the positive side (+output, pin 6) to effectively reverse the output polarity. filtering and noise reduction all a-series uwr 14-20 watt dc/dc converters achieve their rated ripple and noise specifications without the use of external input/output capacitors. in critical applications, input/output 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. the caps should be located as close to the power converters as possible. typical values are listed below. in many applications, using values greater than those listed will yield better results. in critical, space-sensitive applications, datel may be able to tailor the internal input/output filtering of these units to meet your specific requirements. contact our applications engineering group for additional details. to reduce input ripple "d5a" models 47f, 16v "d12a" models 20f, 50v "d48a" models 20-50f, 100v to reduce output ripple 3.3v outputs 100f, 6v, low esr 5v/5.2v outputs 47f, 10v, low esr 12/15v outputs 22f, 20v, low esr performance/functional specifications typical @ t a = +25c under nominal line voltage and full-load conditions, unless noted. these converters require a minimum 10% 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 upon request. contact datel applications engineering for details. a applying a voltage to the control pin when no input power is applied to the converter can cause permanent damage to the converter. ? devices can be screened or modified for higher guaranteed isolation voltages. contact datel applications engineering for details. ? except for 3.3v outputs which have no protection. input input voltage range: "d5a" models 4.7-7.5 volts (5v nominal) "d12a" models 9-36 volts (24v nominal) "d48a/d48e" models 18/36-75 volts (48v nominal) input current see ordering guide input filter type pi (c-type for "d5a" models) overvoltage shutdown: "d5a" models 10 volts "d12a" models 40 volts "d48a and /d48e" models 80 volts reverse-polarity protection yes (instantaneous, 10a maximum) on/off (sync.) control (pin 4) a ttl high = off, low (or open) = on output v out accuracy (50% load) 1%, maximum temperature coefficient 0.02% per c ripple/noise (20mhz bw) see ordering guide line/load regulation see ordering guide efficiency see ordering guide isolation voltage ? 1500vdc guaranteed isolation capacitance 550pf current limiting auto-recovery overvoltage protection zener/transorb clamp, magnetic feedback dynamic characteristics transient response (50% load step) 200sec max. to 1.5% of final value switching frequency 165khz (15khz) environmental operating temperature (ambient) : without derating C40 to +40/50/55/65c (model dependent) with derating to +100c (see derating curves) storage temperature C40 to +105c physical dimensions 2" x 2" x 0.45" (51 x 51 x 11.4mm) shielding 5-sided case connection: "d5a", "d12a" models pin 2 (Cv in ) "d48a", "d48e" models pin 1 (+v in ) case material corrosion resistant steel with non-conductive, epoxy-based, black enamel finish and plastic baseplate pin material brass, solder coated weight 2.7 ounces (76.5 grams) 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 uwr models 14-20w, single output dc/dc converters
+input +o u tpu t tr im com m on 1 2 6 7 8 lo a d 20k w 5-10 turns ?in p u t trim down trim u p 1 2 6 7 8 lo a d +input +o u tpu t tr im com m on ?in p u t 4 input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. for datel a-series uwr 14-20 watt dc/dc converters, you should use slow-blow type fuses with values no greater than the following: v in range fuse value "d5a" 6a "d12a" 4a "d48a/d48e" 2a on/off control the on/off control pin (pin 4) may be used for remote on/off operation. a ttl logic high (+2 to +5 volts, 250a max.) applied to pin 4 disables the converter. a ttl logic low (0 to +0.8 volts, 70a max.), or no connection, enables the converter. control voltages should be referenced to pin 2 (Cinput). applying a voltage to the control pin when no input power is applied to the converter can cause permanent damage to the converter. synchronization in critical applications employing multiple switching dc/dc converters, it may be desirable to intentionally synchronize the switching of selected converters (so the system noise can be reduced with notch filtering) or to purposely desynchronize the converters (to lessen the current-carrying requirements on intermediate dc buses). for multiple a-series converters, an external clock can be applied to pin 4 (control) of each device. it should be a square wave with a maximum 1sec "high" duration and an amplitude between +2v and +5v (see on/off control) referenced to pin 2 (Cinput). the frequency of the synchronizing clock should be higher than that of any individual converter. therefore, it should be 185khz 5khz. output trimming v out may be trimmed 5% via a single external trimpot or fixed resistor. the trimpot should be connected as shown in figure 2a with its wiper connected to pin 8 (trim). a trimpot can be used to determine the value of a single fixed resistor which should be connected as shown in figure 2b. connect the resistor between pin 8 (trim) and pin 6 (+output) to trim "down" the output voltage. connect the resistor between pins 8 and 7 (common) to trim "up" the output voltage. fixed resistors should be metal-film types with absolute tcrs less than 100ppm/c to ensure stability. figure 2a. trim connections using a trimpot figure 2b. trim connections using fixed resistors custom capabilities 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. more importantly . . . 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. a series 14-20w, single output dc/dc converters
5 if youre designing with emc in mind, please note that all of datels uwr 14-20 watt a-series 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 specifica- tions can be supplied upon request. radiated emissions plots to fcc and cispr 22 for model uwr-5/4000-d12a appear below. published emc test reports are available for each model number. contact datel's applications engineering department for more details. emi radiated emissions typical performance curves (t a = +25c) the performance curves below were derived from actual test data for a single model number (uwr-5/4000-d12a). since all devices in the 14-20w uwr a-series have the same circuit topology, the performance curves are representative of all devices. efficiency vs. output current and input voltage output voltage vs. input voltage and output current output voltage vs. output current and input voltage line regulation load regulation efficiency 87 84 81 78 75 72 69 66 63 efficiency (%) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 5v output current (amps) v in = 36v v in = 24v v in = 12v 5.015 5.010 5.005 5.000 4.995 4.990 4.985 4.980 4.975 v out (volts) 9 12 15 18 21 24 27 30 33 3 6 v in (volts) i out = 4a i out = 2a i out = 1a 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 5v output current (amps) v in = 36v v in = 24v v in = 12v 5.015 5.010 5.005 5.000 4.995 4.990 4.985 4.980 4.975 v out (volts) uwr models 14-20w, single output dc/dc converters 80 70 60 50 40 30 20 10 0 C10 C20 fre q uenc y ( mhz ) 100 1000 radiated emissions fcc class b limit uwr-5/4000-d12a radiated emissions fcc part 15 class b, 3 meters converter output = 5vdc @ 3.6a radiated emissions (dbv/m) uwr-5/4000-d12a radiated emissions en 55022 class b, 10 meters converter output = +5vdc @ 3.6a 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)
ds-0361 9/98 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. iso 9001 i so 9001 registered 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 quality and reliability the a-series are the first dc/dc converters to emerge from datels new, company-wide approach to designing and manufacturing the most reliable power converters available. the five-pronged program draws our quality assurance function into all aspects of new-product design, development, characterization, qualification 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 qualification 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 datel 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 accelerated life testing) repeatedly during the design and early manufacturing phases to detect potential electrical and mechanical design weaknesses that could result in possible future field failures. during halt, prototype and pre-production dc/dc converters are subjected to progressively higher stress levels induced by thermal cycling, rate of tempera- ture change, vibration, power cycling, product-specific stresses (such as dc voltage variation) and combined environments. the stresses are not meant to simulate field environments but to expose any weaknesses in a products electro/mechanical design and/or assembly processes. the goal of halt is to make products fail so that device weaknesses can be analyzed and strength- ened 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. datel has invested in a qualmark ovs-1 halt tester capable of applying voltage and temperature extremes as well as 6-axis, linear and rotational, random vibration. a typical halt profile (shown above) consists of thermal cycling (C55 to +125c, 30c/minute) and simultaneous, gradually increasing, random longitudinal and rotational vibration up to 20gs with load cycling and applied-voltage extremes added as desired. many devices in datels 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. qualification for each new product, electrical performance is verified via a comprehensive characterization process and long-term reliability is confirmed via a rigorous qualification procedure. the qual procedure includes such strenuous 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 fine 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 temperature cycled, burned-in, hi-pot tested and final-electrical tested prior to external visual examination, packing and shipping. rapid response to problems datel employs an outstanding corrective-action system to immediately address any detected shortcomings in either products or processes. whenever 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 refine our assembly operation to yield one of the lowest product defect rates in the industry. typical halt profile qualification test method/comments halt datel in-house procedure high temperature storage max. rated temp., 1,000 hours thermal shock 10 cycles, C55 to +125c temperature/humidity +85c, 85% humidity, 48 hours lead integrity datel in-house procedure life test +70c, 500 hours* marking permanency datel in-house procedure end point electrical tests per product specification qualification testing * interim electrical test at 200 hours. 10 20 30 40 50 60 70 80 90 40 20 0 random vibration (g's) temperature (c) test time (minutes) 100 80 60 40 20 0 C20 C40 datel, inc. 11 cabot boulevard, mansfield, ma 02048-1151 tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 internet: www.datel.com email: sales@datel.com data sheet fax back: (508) 261-2857 a series 14-20w, single output dc/dc converters innovation and ex c ell e n c e ? ?
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