single output uhr models ruggedized, 2" x 2" 16-20 watt, dc/dc converters figure 1. simplified schematic datels xhr series dc/dc converters deliver a measure of cost-effective long- term reliability not previously available in commercial, off-the-shelf power converters. these dc/dcs combine the high-efficiency and wide-input-range of datels venerable xwr series dc/dcs with a newly developed, all metal-ceramic, construc- tion technique that eliminates the need for thermally-conductive potting compounds. all electrical components are surface-mount soldered to a 60 mil (0.06"/1.52mm) ceramic baseplate for low junction-to-case thermal resistance. package pins, instead of traditional butt soldering, are soldered through the baseplate via pre-cut holes. pre-cutting prior to firing, as opposed to laser cutting after firing, eliminates micro cracks. the tin plated, steel cover is soldered to the baseplate creating a level of hermiticity not available in other commercial power modules. the bottom of the baseplate has a conductive layer that provides 6-sided shielding. it is also insulated so pc-card runs can pass beneath the package. uhr models are the single-output devices in the xhr series. they offer outputs of 3.3, 5, 12 or 15 volts. the ultra-wide (4:1) input voltage ranges are either 9-36v ("d12" models) or 18-72v ("d48" models). line and load regulation are a tight 0.3% max. and 0.5% max., respectively. all devices guarantee that output ripple/noise will be less than 100mvp-p. isolation voltage is guaranteed to be at least 750vdc. uhr devices carry industry-standard pinouts in packages whose outside dimensions are only slightly larger than the 2" x 2" standard. they can be subjected to mutually-agreed-upon, high-rel screening programs as necessary to satisfy your system's reliability requirements. contact datel for additional details. 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 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 ruggedized design all metal-ceramic construction low junction-to-baseplate thermal impedance no potting compounds 3.3, 5, 12 or 15 volt outputs ultra-wide input voltage ranges: 9-36v or 18-72v industry-standard pinouts no external components required tight regulation, low ripple/noise guaranteed efficiencies to 82% v out trim and on/off control modifications and customs for oems +v out +v in C v in reference & error amp opto isolation pwm controller Cv out
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 part number structure mechanical specifications temperature derating xhr series 16-20w, single output dc/dc converters performance specifications and ordering guide 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 20% to 100% load. ? nominal line voltage, no-load/full-load conditions. uhr-3.3/4850-d12 3.3 4850 75 0.5% 1.0% 24 9-36 45/916 75% c8, p6 uhr-3.3/4850-d48 3.3 4850 100 1.0% 1.0% 48 18-72 25/440 78% c8, p6 uhr-5/4000-d12 5 4000 100 0.3% 0.5% 24 9-36 25/1060 79% c8, p6 uhr-5/4000-d48 5 4000 100 0.3% 0.5% 48 18-72 25/526 80% c8, p6 uhr-12/1650-d12 12 1650 100 0.3% 0.5% 24 9-36 30/1050 81% c8, p6 uhr-12/1650-d48 12 1650 100 0.3% 0.5% 48 18-72 25/514 81% c8, p6 uhr-15/1300-d12 15 1300 100 0.3% 0.5% 24 9-36 30/1000 82% c8, p6 uhr-15/1300-d48 15 1300 100 0.3% 0.5% 48 18-72 30/495 82% c8, p6 ripple/noise (mvp-p, max.) v out (volts) package (case, pinout) efficiency (min.) regulation (max.) line v in nom. (volts) range (volts) model i out (ma, max.) i in ? (ma, max.) load a output input output power (watts) ambient temperature (c) 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 a b C40 0 35 40 45 50 55 60 65 70 75 80 85 90 9 5 uhr-3.3/4850-d12 a uhr-3.3/4850-d48 a uhr-5/4000-d12 b uhr-5/4000-d48 b uhr-12/1650-d12 c uhr-12/1650-d48 c uhr-15/1300-d12 d uhr-15/1300-d48 e c e d output configuration: u = unipolar nominal output voltage: 3.3, 5, 12 or 15 volts maximum output current in ma input voltage range: d12 = 9-36 volts (24v nominal) d48 = 18-72 volts (48v nominal) metal-ceramic construction wide range input 5 u hr 4000 d12 -/ - 0.040 0.002 dia. (1.016 0.051) 2.00 (50.80) 0.45 (11.43) 0.30 (7.62) bottom view 1.800 (45.72) 0.400 (10.16) 1 2 4 8 5 6 7 metal case ceramic baseplate 2.06 (52.32) 2.06 (52.32) 0.06 (1.52) 0.13 (3.30) 0.43 (10.92) 1.200 (30.48) 3 eq. sp. @ 0.400 (10.16) 0.200 (5.08) 0.100 (2.54) case c8 notes: for "d12" models, the case is connected to pin 2 (Cv in ). for "d48" models, the case is connected to pin 1 (+v in ).
3 uhr models 16-20w, single output dc/dc converters performance/functional specifications typical @ t a = +25c under nominal line voltage and full load conditions unless noted. input input voltage range: "d12" models 9-36 volts (24v nominal) "d48" models 18-72 volts (48v nominal) input current see ordering guide input filter type lc overvoltage shutdown: "d12" models 40 volts "d48" models 76 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 750vdc, minimum 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 (10khz) environmental operating temperature (ambient) : without derating C40 to +35/40/45/50c (model dependent) with derating to +95c (see derating curves) maximum baseplate temperature +95c storage temperature C55 to +125c physical dimensions 2.06" x 2.06" x 0.45" (52 x 52 x 11.4mm) shielding 6-sided case connection: "d12" models pin 2 (Cv in ) "d48" models pin 1 (+v in ) case material: cover tin plated steel baseplate ceramic (0.06"/1.52mm) pin material brass, solder coated weight 1.7 ounces (49.5 grams) these 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 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. floating outputs all 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 uhr 16-20 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 require- ments. contact our applications engineering group for additional details. to reduce input ripple "d12" models 20f, 50v "d48" models 20-50f, 100v to reduce output ripple 3.3v outputs 100f, 6v, low esr 5v outputs 47f, 10v, low esr 12/15v outputs 22f, 20v, low esr 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 input voltage: "d12" models 44 volts "d48" models 80 volts input reverse-polarity protection current must be <10a. brief duration only. fusing recommended. output overvoltage protection: 3.3v outputs no 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 model dependent storage temperature C55 to +125c lead temperature (soldering, 10sec.) +300c technical notes
4 xhr series 16-20w, single output dc/dc converters input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. for datel uhr 16-20 watt dc/dc converters, you should use slow-blow type fuses with values no greater than the following: v in range fuse value "d12" 4a "d48" 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 certain applications employing multiple uhr converters and also demanding minimal noise levels, some improvements may be had by synchronizing the switching of the various converters. the synchronizing clock should 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 180khz 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. ds-0355 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. 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 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 innovation and ex c ell e n c e ? ? trim down trim up +input Cinput output trim common 1 2 6 7 8 load 20k w 5-10 turns trim down trim up +input Cinput output trim common 1 2 6 7 8 load figure 2a. trim connections using a trimpot figure 2b. trim connections using fixed resistors
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