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 innovation and ex c ell e n c e ? ? dual output bpb models high-efficiency, smaller-package 25-40 watt, dc/dc converters features datel?s bpb model, 25-40 watt, dual-output dc/dc converters bring you efficient "on-board" power processing in a cost-effective smaller package with a standard pinout. the 2" x 3" bpb "footprint" conforms to the industry-standard pinout and pin geometries of most 3" x 3" devices (a 33% space savings) while delivering as much as 60% more power (40w vs. 25w). applicable to a wide range of telecom, computer and other oem applications, bpb model dc/dc?s offer 5v, 12v or 15v outputs. they operate from four different input voltage ranges with total available output power being a function of the selected input range. "q12" models operate from 10-36v and deliver 25w. "q48" models operate from 18-72v and deliver 30w. for "d24" and "d48" models, the input voltage ranges and rated output powers are 18-36v at 35w and 36-72v at 40w, respectively. for improved reliability and affordability, bpb models exploit modern, high-speed, automatic assembly to construct their field-proven, smt-on-pcb designs. devices employ corrosion-resistant steel cases with heavy zinc top plates (traditionally referred to as baseplates). heat-generating transformer cores and power semiconductors are mounted directly to the cases, which have threaded inserts for optional add-on heat sinks and/or pcb mounting. all devices feature input pi filters, input overvoltage shutdown, output overvoltage protection, output current limiting, and thermal shutdown. ul, csa, en and iec compliance testing is currently in progress as are emi/emc characterizations. figure 1. simplified schematic opto feedback reference & error amplifier pwm controller +v in ? v in on/off control (sync) trim common +v out ? v out case ? v in pwm 25/30/35/40w output power standard pinout! smaller size! new 2" x 3" package fits 3" x 3" footprint 5v, 12v or 15v outputs four input voltage ranges: 10-36v, 18-36v 18-72v, 36-72v high efficiencies (to 88%) fully isolated, 750vdc guaranteed fully i/o protected thermal shutdown v out trim and on/off control safety approvals pending modifications and customs for oem?s
25-40w, dual output dc/dc converters xpb series 2 as shown below, bpb model dc/dc converters are classified by output power. for dual-output devices, the total output power from the two outputs can not exceed the rated power. for example, "q48" models have a maximum output power of 30w. therefore, if the +output is sourcing 20 watts, the ?output is limited to sourcing 10 watts ensuring the total output power does not exceed 30 watts. output configuration: b = bipolar nominal output voltages: 5, 12 or 15 volts 5 b pb 4 - / d48 - input voltage range: q12 = 10-36 volts (24v nominal) d24 = 18-36 volts (24v nominal) q48 = 18-72 volts (48v nominal) d48 = 36-72 volts (48v nominal) maximum output current in amps from each output power package with metal baseplate ? typical at t a = +25c under nominal line voltage and balanced "full-load" conditions unless otherwise noted. for bpb devices, "full load" is a function of each device's input voltage range. see output power considerations and technical notes for more details. ? ripple/noise (r/n) measured over a 20mhz bandwidth. ? balanced loads, 10% to 100% load. ? nominal line voltage, no-load/full-load conditions. performance specifications and ordering guide r/n (mvp-p) ? load ? v out (volts) package (case, pinout) efficiency regulation (max.) line v in nom. (volts) range (volts) model i in ? (ma) ? max. typ. typ. min. bpb-5/4-q12 5 4 100 150 0.5% 1% 24 10-36 15/1225 82% 85% c10, p15 bpb-5/4-d24 5 4 100 150 0.5% 1% 24 18-36 15/1696 84% 86% c10, p15 bpb-5/4-q48 5 4 100 150 0.5% 1% 48 18-72 25/735 82% 85% c10, p15 bpb-5/4-d48 5 4 100 150 0.5% 1% 48 36-72 20/980 83% 85% c10, p15 bpb-12/1.65-q12 12 1.65 100 150 0.5% 1% 24 10-36 15/1224 82% 85% c10, p15 bpb-12/1.65-d24 12 1.65 100 150 0.5% 1% 24 18-36 15/1667 85% 87% c10, p15 bpb-12/1.65-q48 12 1.65 100 150 0.5% 1% 48 18-72 15/727 84% 86% c10, p15 bpb-12/1.65-d48 12 1.65 100 150 0.5% 1% 48 36-72 15/948 85% 87% c10, p15 bpb-15/1.3-q12 15 1.3 100 150 0.5% 1% 24 10-36 20/1225 83% 85% c10, p15 bpb-15/1.3-d24 15 1.3 100 150 0.5% 1% 24 18-36 15/1648 85% 88% c10, p15 bpb-15/1.3-q48 15 1.3 100 150 0.5% 1% 48 18-72 15/735 83% 85% c10, p15 bpb-15/1.3-d48 15 1.3 100 150 0.5% 1% 48 36-72 20/923 85% 88% c10, p15 i out (amps) part number structure model maximum output power q12 25 watts q48 30 watts d24 35 watts d48 40 watts i/o connections function p15 no pin ?input +input case on/off control* ?output no pin common +output trim pin 1 2 3 4 5 6 7 8 9 10 * see note 4 on next page. mechanical specifications bottom view 2.500 (63.50) 0.25 (6.35) 2.00 (50.80) 7 6 8 9 1.600 (40.64) 4 eq. sp. @ 0.400 (10.16) 4 1 2 0.20 (5.08) 1.200 (30.48) 2.600 (66.04) 0.40 (10.16) 3.00 (76.20) (4) threaded inserts #4-40 thd thru with 0.025 (0.64) standoffs 0.20 (5.08) 3 5 10 0.50 (12.70) 0.20 min. (5.08) 0.040 0.002 dia. (1.016 0.051) 0.025 (0.64) metal case metal baseplate case c10 2.600 (66.04) 0.20 (5.08) 2.00 (50.80) 1.200 (30.48) 3.00 (76.20) 0.50 (12.70) 0.40 (10.16) 0.10 (2.54) 0.120 dia. (3.048) (4 places) material: black anodized aluminum 4 mounting screws and 0.009 (0.229) thermal pad included top view optional heat sink (part number hs-23) output power considerations output input
bpb models 25-40w, dual output dc/dc converters 3 floating outputs since these are isolated dc/dc converters, their outputs are "floating." any bpb 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 ?output (pins 9 and 6), with either output grounded. the common (pin 8) should be left open. minimum 20% loading is recom- mended under these conditions. the total output voltage span may be externally trimmed as described below. performance/functional specifications typical @ t a = +25c under nominal line voltage and "full-load" conditions, unless noted. input input voltage range: q12 models 10-36 volts (24v nominal) d24 models 18-36 volts (24v nominal) q48 models 18-72 volts (48v nominal) d48 models 36-72 volts (48v nominal) input current see ordering guide input filter type pi overvoltage shutdown: q12 and d24 models 40 volts q48" and d48 models 80 volts reverse-polarity protection yes (instantaneous, 6a maximum) on/off control (pin 5) ttl high (or open) = on, low = off 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 620pf current limiting continuous, auto-recovery overvoltage protection zener/transorb clamps, magnetic feedback dynamic characteristics transient response (50% load step) 300sec max. to 1.5% of final value switching frequency 125khz (10%) environmental operating temperature (ambient): without derating ?25 to +50c (model dependent) with derating to +90c (see derating curves) maximum baseplate temperature +90c storage temperature ?40 to +105c physical dimensions 2" x 3" x 0.5" (50.8 x 76.2 x 12.7mm) shielding 6-sided case connection pin 4 case material bright tin-plated steel baseplate material aluminum pin material brass, solder coated weight 4 ounces (113 grams) these converters require a minimum 10% loading on each output to maintain specified regulation. operation under no-load conditions will not damage these devices; however they may not meet all listed specifications. "full load" varies by part number and is determined by the input voltage range as indicated by the part number suffix. see technical notes and o utput power considerations. application-specific input/output filtering can be recommended or perhaps added internally upon request. contact datel applications engineering for details. applying a voltage to the on/off control pin when no input power is applied to the converter can cause permanent damage to the converter. if desired, the on/off control function can be replaced with a sync function. see page 6 of this data sheet for more details. filtering and noise reduction all bpb 25-40 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 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 6 or 9) and common (pin 8). see figure 7. 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 q12, d24 models 47f, 50v q48, d48 models 10f, 100v to reduce output ripple 5v outputs 47f, 10v, low esr 12/15v outputs 22f, 20v, low esr in critical, space-sensitive applications, datel may be able to tailor the internal input/output filtering of these devices to meet your specific require- ments. contact our applications engineering group for additional details. input voltage: q12/d24 models 44 volts q48/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 (10%), limited duration 12v outputs 15 volts (10%), limited duration 15v outputs 18 volts (10%), 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 specifications table is not implied. absolute maximum ratings technical notes input fusing v in range q12 d24 q48 d48 fuse value 4a 4a 3a 2a
25-40w, dual output dc/dc converters xpb series 4 temperature derating and electrical performance curves q12 models (25 watts) output power (watts) ambient temperature (c) 25 20 15 10 5 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 output power (watts) ambient temperature (c) 25 20 15 10 5 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9 0 figure 2a. temperature derating without heat sink figure 2b. temperature derating with heat sink output power (watts) ambient temperature (c) 30 25 20 15 10 5 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 output power (watts) ambient tem p erature ( c ) 30 25 20 15 10 5 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9 0 figure 3a. temperature derating without heat sink figure 3b. temperature derating with heat sink q48 models (30 watts) output power (watts) ambient temperature (c) 35 30 25 20 15 10 5 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 output power (watts) ambient temperature (c) 35 30 25 20 15 10 5 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9 0 figure 4a. temperature derating without heat sink figure 4b. temperature derating with heat sink d24 models (35 watts)
bpb models 25-40w, dual output dc/dc converters 5 40 35 30 25 20 15 10 5 0 output power (watts) ambient temperature (c) ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute figure 5a. temperature derating without heat sink figure 5b. temperature derating with heat sink d48 models (40 watts) output power (watts) ambient temperature (c) 40 35 30 25 20 15 10 5 0 ?25 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9 0 natural convection cooling 150 linear feet per minute 300 linear feet per minute temperature derating and electrical performance curves voltage output model number range power 5v currents 12v currents 15v currents bpb-5/4-q12 10-36v 25 watts 2.5a (25w) ? ? bpb-5/4-q48 18-72v 30 watts 3a (30w) ? ? bpb-5/4-d24 18-36v 35 watts 3.5a (35w) ? ? bpb-5/4-d48 36-72v 40 watts 4a (40w) ? ? bpb-12/1.65-q12 10-36v 25 watts ? 1.04a (24.96w) ? bpb-12/1.65-q48 18-72v 30 watts ? 1.25a (30w) ? bpb-12/1.65-d24 18-36v 35 watts ? 1.46a (35w) ? bpb-12/1.65-d48 36-72v 40 watts ? 1.67a (40.1w) ? bpb-15/1.3-q12 10-36v 25 watts ? ? 833ma (24.99w) bpb-15/1.3-q48 18-72v 30 watts ? ? 1a (30w) bpb-15/1.3-d24 18-36v 35 watts ? ? 1.17a (35.1w) bpb-15/1.3-d48 36-72v 40 watts ? ? 1.33a (39.9w) definition of "full load" for specification purposes output power bpb model, dual-output dc/dc converters incorporate a design tradeoff between total available output power and input voltage range. the total available power is a function of both the nominal input voltage and the "width" of the input voltage range. for a given nominal input (24v or 48v), narrower ranges (2:1 vs. 4:1) have more available power. for a given "width" of input range (2:1 or 4:1), higher nominal inputs (48v vs. 24v) have more available power. each device, as indicated by its part-number suffix (q12, q48, d24 or d48) has a total output power limitation of 25, 30, 35 or 40 watts, respectively. observing these power limitations is the user's responsibility. as indicated by its part number structure, each 5v, 12v or 15v bpb device is capable of sourcing up to 4, 1.65 or 1.3 amps, respectively. users have the flexibility of loading either output up to these limits; however you must be extremely careful not to exceed the total output power rating of any given device. if, for example, a 5v device with a 30w power rating (bpb-5/4-q48) is sourcing 4a from its +5v output (representing 20w of +output power), that device can only supply an additional 10w (2 amps) from its ?output. as a consequence of this "power-allocation" flexibility, the definition of "full load," as the condition under which performance specifications are tested and listed, is ambiguous. the following table lists the positive and negative output currents that datel uses to define each device?s "full load." table 1. output currents comprising "full load"
25-40w, dual output dc/dc converters xpb series 66 ds-0410 12/01 on/off control (standard) the on/off control pin (pin 5) may be used for remote on/off operation. as shown in figure 6, the control pin has an internal 10k pull-up resistor to approximately 10v. the converter is designed so that it is enabled when the control pin is left open (normal mode) and disabled when the control pin is pulled low (to less than +0.8v relative to ?input, pin 2). dynamic control of the on/off function is best accomplished with a mechani- cal relay or an open-collector/open-drain drive circuit (optically isolated if appropriate). the drive circuit should obviously be able to sink approximately 1ma when activated and withstand more than 10 volts when deactivated. applying an external voltage to pin 5 when no input power is applied to the converter can cause permanent damage to the converter. the on/off control function, however, is designed such that the converter can be disabled (pin 5 pulled low) while input power is ramping up and then "released" once the input has stabilized. under these circumstances, it takes approximately 30ms for the output of the fully loaded dc/dc to ramp up and settle to within 1% of its final value after the converter has been turned on. synchronization (optional) 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). bpb dc/dc converters have been designed so that the on/off control function on pin 5 can be replaced with a sync function. this change has to be implemented by datel during the product assembly process. contact our applications engineering group for additional details. to synchronize the switching of multiple bpb converters configured with the sync function, an external clock can be applied to pin 5 of each converter. the clock should be a ttl square wave referenced to ?input (logic high = +2 to +5 volts, 250a max.; logic low = 0 to +0.8 volts, 70a max.) with a maximum 1sec "high" duration. the frequency of the synchronizing clock should be higher than that of any individual converter. therefore, it should be 145khz 5khz. output trimming the total output volt age span, from +output (pin 9) to ?output (pin 6) may be trimmed 5% via a single trimpot or fixed resistor. the trimpot should be connected as shown in figure 8 with its wiper connected to pin 10 (trim). a trimpot can also be used to determine the value of a single fixed resistor which can be connected between pin 10 (trim) and pin 9 (+output) to trim "down" the output voltages, or between pins 10 (trim) and 6 (?output) to trim "up" the output voltages. fixed resistors should be metal-film types with absolute tcr's less than 100ppm/c to ensure stability. figure 7. using external capacitors to reduce input/output ripple/noise figure 8. trim connections using a trimpot ?output +input ?input +output 3 2 9 6 common 8 c in c out c out + + + 20k 5-10 turns +input ?input trim common 3 2 9 6 8 load load 10 ?output +output case connection unlike most other dc/dc converters, bmp dc/dc's do not have their metal case connected to one of their input pins. the "uncommitted" case is connected to pin 4 which, depending on your system configuration, should be connected to either +input (pin 3) or ?input (pin 2). +input ?input 3 2 +10v 10k 5 on/off control figure 6. driving the on/off control pin 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. spe cifications are subject 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: 6-6354-2025 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 ? ? iso-9001 registered
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