5v and 3.3v, independent dual output 30 watt, dc/dc converters dual output mixed voltage, bwr models features figure 1. simpli ed schematic innovation and ex c ell e n c e ? ? ! ! ! ! ! ! ! ! ! ! ! datel, inc., mans eld, ma 02048 (usa) ? tel: (508)339-3000, (800)233-2765 fax: (508)339-6356 ? email: sales@datel.co m ? internet: www.datel.com datel's bwr series of dc/dc converters now includes two independent con- verters in one 2" x 2" package. the bwr-5/3-3.3/4.25 family provides both 5v at 3 amps and 3.3v at 4.25 amps for a combined output power of 30 watts from input ranges of 10v to 18v (-d12a), 18 to 36v (-d24a), or 36 to 75v (-d48a). each output is regulated by its own control loop to provide ?% load and ?.5% line regulation. individual trim pins and a negative or positive on/off control pin allow independent adjustment of output voltages and any combination of power-on sequencing between the 5v and 3.3v outputs. a high ef ciency of 88% allows full load operation up to +65? ambient temperature in a still air environment. although functionally independent, both outputs are driven from synchronized pwms to prevent asynchronously generated beat frequencies. housed in a plastic case, all models include input pi ltering, input overvoltage protection, independent output short circuit and current limiting protection and independent output overvoltage protection as well as thermal shutdown. a sync option is available in place of 3.3v on/off control. these devices meet iec950, ul1950 and en6950 safety standards. cb reports are available upon request. "d48a" models are ce marked (meet lvd requirements). independently regulated 5v/ 3.3v outputs 5v @ 3a/3.3v @ 4.25a simultaneously delivered independent v out trim pins for margining independent on/off control pins 88% ef ciency; 75mv ripple/noise input ranges: 10-18v, 18-36v or 36-75v ul 1950 and en60950 safety approvals fully isolated, 1500vdc guaranteed input under and overvoltage shutdown independent ovp; short circuit protection thermal shutdown ?input pwm controller opto isolation reference & error amp switch control +3.3v outpu t +3.3v output return switch control +5v output return +5v output +input 5v on/off control 3.3v on/off control input undervoltage and overvoltage comparators pwm controller opto isolation reference & error amp
30w, dual output, mixed-voltage dc/dc converters xwr series 1 2 3 4 8 9 10 5 6 7 2.00 (50.80) 1.800 (45.72) 0.10 (2.54) bottom view 0.20 (5.08) 0.200 (5.08) 0.300 (7.62) 0.600 (15.24) 1.000 (25.40) 1.600 (40.64) 1.200 (30.48) 0.600 (15.24) 3 eq. sp. @ 0.200 (5.08) plastic case 0.040 0.001 dia. (1.016 0.025) 0.20 min (5.08) 2.00 (50.08) 0.48 (12.19) standoff 0.020 (0.51) dimensions are in inches (mm) performance speci cations and ordering guide ? part number structure v 1 nominal output voltage: 5 volts 5 bwr 3 - / d48a - input voltage range: d12a = 10-18 volts (12v nominal) d24a = 18-36 volts (24v nominal) d48a = 36-75 volts (48v nominal) i 1 maximum output current: 3 amps dual output/ mixed-voltage series 3.3 4.25 / - n v 2 nominal output voltage: 3.3 volts i 2 maximum output current: 4.25 amps add "n" or "s" suf x as desired part number suf xes bwr 30 watt dc/dc's are designed so a negative logic on/off control ("n" suf x) can be added in the pins 3 and 4 position, or a sync function ("s" suf x) can be added in the pin 3 position. no suf x on/off control function (positive polarity) n negative polarity on/off control s sync function bwr-5/3-3.3/4.25-d12a 5 3 75 100 ?.5% ?% 12 10-18 210/2846 83% 85% c20, p42 3.3 4.25 75 100 ?.5% ? % bwr-5/3-3.3/4.25-d24a 5 3 75 100 ?.5% ?% 24 18-36 115/1374 85.5% 88% c20, p42 3.3 4.25 75 100 ?.5% ? % bwr-5/3-3.3/4.25-d48a 5 3 75 100 ?.5% ?% 48 36-75 70/687 85.5% 88% c20, p42 3.3 4.25 75 100 ?.5% ? % ? typical at t a = +25? under nominal line voltage and "full-load" conditions. ? any combination of 5v/3.3v current, not to exceed the published i out speci cation (30 watts). ? ripple/noise (r/n) measured over a 20mhz bandwidth with 0.47? ceramic output capacitors. ? tested from 10% load to 100% load. ? nominal line voltage, no load/full load condition. output input r/n (mvp-p) ? regulation (max.) ef ciency package v out i out ? v in nom. range i in ? (case, model (volts) (amps) typ. max. line load ? (volts) (volts) (ma) min. typ. pinout) 2 i/o connections pin function p42 1 +input 2 ?nput 3 +5v on/off 4 +3.3v on/off 5 +5v output 6 +5v return 7 +5v trim 8 +3.3v return 9 +3.3v output 10 +3.3v trim case c20 mec a nical specifications
bwr models 30w, dual output, mixed-voltage dc/dc converters performance/functional speci cations typical @ t a = +25? under nominal line voltage, balanced "full-load" conditions, unless noted. ? input input voltage range: d12a models 10-18 volts (12v nominal) d24a models 18-36 volts (24v nominal) d48a models 36-75 volts (48v nominal) overvoltage shutdown: d12a models 18.5-21 volts (20v nominal) d24a models 37-40 volts (38v typical) d48a models 77-81 volts (79v typical) start-up threshold: d12a models 9.4-10 volts (9.6v typical) d24a models 16.5-18 volts (17v typical) d48a models 34-36 volts (35v typical) undervoltage shutdown: d12a models 7-8.5 volts (8v typical) d24a models 16-17.5 volts (16.5v typical) d48a models 32.5-34.5 volts (33.5v typical) input current: normal operating conditions see ordering guide standby mode: off, ov, uv, thermal shutdown 10ma typical input re ected ripple current: source impedance <0.1 ? , no external input ltering d12a models tbd d24a/d48a models tbd internal input filter type pi (0.022? - 4.7? - 2.46?) reverse-polarity protection: d12a models 1 minute duration, 6a maximum d24a models 1 minute duration, 4a maximum d48a models 1 minute duration, 2a maximum on/off control (pins 3 & 4): ? ? ? d12a, d24a & d48a models on = open or 13v to +v in , i in = 1.6ma @ 13v off = 0-0.8v, i in = 2ma @ 0v "n" suf x models ? on = 0-1.2v, i in = 2ma @ 0v off = open sync (option, pin 4): ? ? ? input threshold (rising edge active) 1-2.7 volts input voltage low 0-0.9 volts input voltage high 2.8-5 volts input resistance 35k ? minimum output high voltage (100? load) 3.5-4.8 volts output drive current 35ma input/output pulse width 160-360nsec output v out accuracy 5v output ?.5% maximum 3.3v output ?.5% maximum minimum loading per speci cation 10% of i out maximum minimum loading for stability ? no load ripple/noise (20mhz bw) ? see ordering guide line/load regulation see ordering guide ef ciency see ordering guide trim range ? ?% isolation voltage: input-to-output 1500vdc minimum output (continued) isolation resistance 100m ? isolation capacitance 470pf current limit inception: 5v @ 98.5% v out 3.8-5.1 amps 3.3v @ 98.5% v out 5.4-6.8 amps short circuit current : 5v output 3.0 amps average current 3.3v output 3.0 amps average current overvoltage protection: magnetic feedback, transorb 5v output 6.0 volts 3.3v output 4.1 volts maximum capacitive loading d12a models 3.3v 1000? 5v 680? d24a, d48a models 3.3v 1000? 5v 680? temperature coef cient ?.02% per ? dynamic characteristics dynamic load response: 5v (50-100% load step to 1% v out ) 200?ec maximum 3.3v (50-100% load step to 1% v out ) 200?ec maximum start-up time: ? v in to v out 10ms on/off to v out tbd switching frequency 355khz (?5khz) environmental mtbf ? bellcore, ground xed, full power 25? ambient d12a models 873.9 thousand hours d24a models 1.32 million hours d48a models 1.23 million hours operating temperature (ambient): ? without derating: d12a models ?0 to +60? d24a & d48a models ?0 to +65? with derating to +100? (see derating curves) case temperature: maximum operational +100? for thermal shutdown +100? minimum, +110? maximum storage temperature ?0 to +120? physical dimensions 2" x 2" x 0.5" (50.8 x 50.8 x 12.7mm) case material diallyl phthalate, ul94v-0 rated pin material brass, solder coated weight: 2.7 ounces (76.5 grams) primary to secondary insulation level operational ? all models are speci ed with external 0.47? ceramic output capacitors. ? see technical notes/graphs for details. ? the on/off control function can be replaced with a sync function. see part number suf xes and technical notes for details. ? applying a voltage to on/off control (pins 3 & 4) when no input power is applied to the converter can cause permanent damage. ? output noise may be further reduced with the installation of additional external output capacitors. see technical notes. ? on/off control is designed to be driven with open collector or by appropriate voltage levels. voltages must be referenced to the ?nput (pin 2). ? demonstrated mtbf available on request. ? for conditions with less than minimum loading, outputs remain stable. however, regulation performance will degrade. ? maximum applied voltage to on/off pin (n suf x) less than 19.0v. 3
30w, dual output, mixed-voltage dc/dc converters xwr series output power (watts) ambient temperature ( c) 35 30 25 20 15 10 5 0 ?40 ?10 0 10 20 30 40 50 60 70 80 90 100 output power vs. ambient temperature (v in nominal, natural convection air flow.) d12a models d24a, d48a models typical performance curves absolute maximum ratings input voltage: continuous: d12a models 23 volts d24a models 42 volts d48a models 81 volts transient (100msec): d12a models 25 volts d24a models 50 volts d48a models 100 volts input reverse-polarity protection input current must be limited. 1 minute duration. fusing recommended. d12a models 6 amps d24a models 4 amps d48a models 2 amps output current ? current limited. devices can withstand an inde nite output short circuit. on/off control (pins 3 & 4) max. voltages referenced to ?nput (pin 2) d12a, d24a & d48a models +v in "n" models ?9v storage temperature ?0 to +120? lead temperature (soldering, 10 sec.) +300? 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, nor recommended. technical notes trimming output voltages these bwr converters have a trim capability (pins 3 & 4) that allow users to independently adjust the output voltages ?%. adjustments to the output voltages can be accomplished via a trim pot, figure 2, or a single xed resistor as shown in figures 3 and 4. a single xed resistor can increase or decrease the output voltage depending on its connection. fixed resistors should have absolute tcr's less than 100ppm/? to minimize sensitivity to changes in temperature. a single resistor connected from the 5v trim pin (pin 7) to the +5v output (pin 5), see figure 3, will decrease the +5v output voltage. a resistor con- nected from the +5v trim (pin 7) to the +5v return (pin 6) will increase the +5v output voltage. see figure 4. similarly, the 3.3v output can be adjusted using a single resistor connected from the +3.3v trim (pin 10) to the +3.3v output (pin 9) or to the +3.3v return (pin 8). see figures 3 and 4. +5v load +5v output ?input +5v on/off control +3.3v on/off control +input +5v trim +5v return +3.3v output +3.3v trim +3.3v return 10 8 1 4 9 7 5 6 20k ? 5-22 turns 3 2 +3.3v load 20k ? 5-22 turns +5v load 5v r trim down +5v output ?input +5v on/off control +3.3v on/off control +input +5v trim +5v return +3.3v trim +3.3v output +3.3v return 9 8 1 4 10 7 5 6 3 2 +3.3v load 3.3v r trim down +5v load 5v r trim up +5v output ?input +5v on/off control +3.3v on/off control +input +5v trim +5v return +3.3v trim +3.3v output +3.3v return 9 8 1 4 10 7 5 6 3 2 +3.3v load 3.3v r trim up 4 note: resistor values are in k ? . accuracy of adjustment is subject to tolerances of resistors and factory-adjusted output accuracy. v o = desired output voltage. up v o C 5 5v r t (k ? ) = C15 6.27 up v o C 3.3 3.3v r t (k ? ) = C14.3 3.16 down 5 C v o 5v r t (k ? ) = C15 2.49(v o C 2.52) down 3.3 C v o 3.3v r t (k ? ) = C14.3 2.49(v o C 1.27) figure 2. trim connections using a trim pot figure 3. trim connections to decrease output voltages using fixed resistors figure 4. trim connections to increase output voltages using fixed resistors
typical performance curves bwr models 30w, dual output, mixed-voltage dc/dc converters typical start-up from v in (v in = nominal, 5v @ 3a/3.3v @ 4.25a, 0.47f output capacitors.) 5v out v in 3.3v out 2.5msec/div 87 85 83 81 79 77 75 d12a models: efficiency vs. line and load 10 11.14 12.29 13.43 14.57 15.71 16.86 18 line voltage (volts) efficiency ( % ) 5v@0a, 3.3v@4.25a 5v@3a, 3.3v@0a 5v@3a, 3.3v@4.25a 89 88 87 86 85 84 83 82 81 80 79 d24a models: efficiency vs. line and load 18 24 30 36 line voltage (volts) efficiency ( % ) 5v@3a, 3.3v@2.325a 5v@1.65a, 3.3v@4.25a 5v@3a, 3.3v@0.4a 5v@0.3a, 3.3v@4.25a 89 87 85 83 81 79 77 d48a models: efficiency vs. line and load 36 48 60 75 line voltage (volts) efficiency ( % ) 5v@3a, 3.3v@2.325a 5v@1.65a, 3.3v@4.25a 5v@3a, 3.3v@0.4a 5v@0.3a, 3.3v@4.25a 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. speci? cations are subj ect 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, mans? eld, ma 02048-1151 tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 internet: www.datel.com email: sales@datel.com iso 9001 registered innovation and ex c ell e n c e ? ? ds-0486 10/01 5
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