dcdc specification 75350 watts ? wide input range ? industry standard packages ? 40 c to +100 c operating temperature ? high power density ? base plate cooled ? remote on/off & remote sense ? 3 year warranty qsb series input input voltage range ? see tables input current ? see tables input reverse voltage ? none protection input filter ? pi network undervoltage lockout ? qsb75-150: 24 vin: - turn on 8.8 v, turn off 8.0 v for 9-36 v, qsb200: 24 vin -turn on 9.6 v, turn off 8.8 v, qsb75-200: 48 vin - turn on 17.0 v, turn off 16.0 v, qsb350: 24 vin - turn on 17.0 v, turn off 16.0 v, qsb350: 48 vin - turn on 35.0 v, turn off 33.0 v input surge ? 24 vin: 50 vdc for 100 ms 48 vin: 100 vdc for 100 ms output output voltage trim ? 10%, see application notes initial set accuracy ? 1.5% max line regulation ? 0.2% max measured from high line to low line load regulation ? 0.2% max measured from 0-100% load transient response ? 5% max deviation, recovery to within 1% in 500 s, 25% step load change ripple & noise ? 3.3 & 5 v models: 100 mv pk-pk 12 & 15 v models: 150 mv pk-pk 24 v & 28 v models: 280 mv max pk-pk 20 mhz bandwidth (see note 1) overvoltage protection ? 115-140% short circuit protection ? continuous thermal shutdown ? case temperature >105 c temperature ? 0.03%/c coefficient current limit ? 110-140% nominal output for 75 & 150 w 110-160% nominal output for 100 w 110-150% nominal output for 200 w 105-140% nominal output for 350 w remote on/off ? see notes 2 & 3 remote sense ? compensates up to 10% of vout nominal, total of output trim and remote sense xppower.com general efficiency ? see tables isolation voltage ? 1500 vdc input to output 1500 vdc input to case 1500 vdc output to case isolation resistance ? 10 7 ? isolation capacitance ? qsb75-200: 100 pf typical, qsb350: 1000 pf typical switching frequency ? qsb75: 300 khz typical qsb100, 150 & 200: 250 khz typical qsb350 (3v3 & 5 v): 300 khz typical qsb350 (12, 24 & 28 v): 330 khz typical power density ? qsb75: 45.4 w/in 3 , qsb100: 60.5 w/in 3 , qsb150: 57.2 w/in 3 , qsb200: 70.3 w/in 3 , qsb350: 123.0 w/in 3 mtbf ? qsb75 & 100: 730 khrs qsb150 & 200: 1 mhrs qsb350: 658 khrs typical to mil-hdbk-217f at 25 c, gb environmental operating base plate ? -40 c to +100 c, see derating curves temperature storage temperature ? -55 c to +105 c operating humidity ? up to 90% non-condensing cooling ? base plate cooled, see derating curves emc & safety emissions ? en55022, level a conducted with external components, see test reports for further details esd immunity ? en61000-4-2, level 2, perf criteria b radiated immunity ? en61000-4-3, 3 v/m, perf criteria a eft/burst ? en61000-4-4, level 1, perf criteria a* surge ? en61000-4-5, level 1, perf criteria a* conducted immunity ? en61000-4-6, 3 v rms perf criteria a safety approvals ? qsb150 & qsb200: ul60950-1 * recommended protection smcj40a for 24 vin, smcj78a for 48 vin
dcdc qsb75/100 models and ratings notes notes 1. ripple & noise is measured with a 10 f tantalum capacitor and 1.0 f ceramic capacitor across output. 2. logic compatibility: ref to -ve input. module on = open circuit. module off = <0.8 vdc. 3. add suffix n to the model number to receive the unit with negative logic remote on/off. 4. input current specified at 24 v for 9-36 vdc and 48 v for 18-75 vdc models. mechanical details input voltage output voltage output current input current (4) efficiency model number (3) no load full load 9-36 vdc (24 v nominal) 3.3 v 12.00 a 50 ma 2.04 a 81.0% qsb7524s3v3 5.0 v 12.00 a 50 ma 2.98 a 84.0% qsb7524s05 12.0 v 6.25 a 50 ma 3.64 a 86.0% qsb7524s12 15.0 v 5.00 a 50 ma 3.64 a 86.0% qsb7524s15 24.0 v 3.12 a 50 ma 3.63 a 86.0% qsb7524s24 18-75 vdc (48 v nominal) 3.3 v 12.00 a 30 ma 1.10 a 82.0% qsb7548s3v3 5.0 v 12.00 a 30 ma 1.47 a 85.0% qsb7548s05 12.0 v 6.25 a 30 ma 1.82 a 86.0% qsb7548s12 15.0 v 5.00 a 30 ma 1.80 a 87.0% qsb7548s15 24.0 v 3.12 a 30 ma 1.80 a 87.0% qsb7548s24 9-36 vdc (24 v nominal) 3.3 v 30.00 a 120 ma 4.80 a 86.0% qsb10024s3v3 5.0 v 20.00 a 120 ma 4.82 a 86.5% QSB10024S05 12.0 v 8.30 a 80 ma 4.80 a 86.5% qsb10024s12 15.0 v 6.70 a 80 ma 4.84 a 86.5% qsb10024s15 24.0 v 4.17 a 80 ma 4.79 a 87.0% qsb10024s24 18-75 vdc (48 v nominal) 3.3 v 30.00 a 60 ma 2.37 a 88.0% qsb10048s3v3 5.0 v 20.00 a 60 ma 2.37 a 88.0% qsb10048s05 12.0 v 8.30 a 30 ma 2.36 a 88.0% qsb10048s12 15.0 v 6.70 a 30 ma 2.38 a 88.0% qsb10048s15 24.0 v 4.17 a 30 ma 2.37 a 88.0% qsb10048s24 1.03 (26.2) 1.45 (36.8) 2.00 (50.80) 1 0.60 (15.24) 0.50 (12.70) 0.16 (4.1) min. ? 0.040 (1.02) pins 1,2,3,5,6,7 ? 0.059 (1.50) pins 4,8 3 2 4 6 7 8 5 2.28 (57.90) 1.14 (28.96) 0.73 (18.42) 0.60 (15.24) mounting hole diameter: 0.126 (3.2) clearance hole 0.30 (7.62) 1.86 (47.20) bottom view pin connections pin function 1 +vin 2 remote on/off 3 -vin 4 -vout 5 -sense 6 trim 7 +sense 8 +vout 1. dimensions are in inches (mm) 2. tolerances: x.xx = 0.02 (x.x = 0.5) x.xxx = 0.01 (x.xx = 0.25) 3. weight: 0.15 lbs (66 g) approx air flow rate typical r ca natural convection 20 ft. / min (0.1 ms) 10.1 c/w 100 ft./min (0.5 ms) 8.0 c/w 200 ft./min (1.0 ms) 5.4 c/w 300 ft./min (1.5 ms) 4.4 c/w 400 ft./min (2.0 ms) 3.4 c/w r ca = thermal resistance case to ambient thermal resistance information maximum power dissipation vs ambient temperature and air flow without heatsink 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 0 10 20 30 40 50 60 70 80 90 100 ambient temperature ,ta (o) power dissipated ,pd (w) natural convection 20 ft./min. (0.1 m/s) 100 ft./min. (0.5 m/s) 200 ft./min. (1.0 m/s) 300 ft./min. (1.5 m/s) 400 ft./min. (2.0 m/s) derating curve
dcdc qsb150350 models & ratings input voltage output voltage output current input current (4) efficiency model number (3) no load full load 9-36 vdc (24 v nominal) 3.3 v 30.00 a 200 ma 4.75 a 87.0% qsb15024s3v3 5.0 v 30.00 a 200 ma 7.19 a 87.0% qsb15024s05 12.0 v 12.50 a 100 ma 7.10 a 88.0% qsb15024s12 15.0 v 10.00 a 100 ma 7.19 a 87.0% qsb15024s15 24.0 v 6.50 a 100 ma 7.34 a 88.0% qsb15024s24 18-75 vdc (48 v nominal) 3.3 v 30.00 a 100 ma 2.34 a 88.0% qsb15048s3v3 5.0 v 30.00 a 100 ma 3.47 a 90.0% qsb15048s05 12.0 v 12.50 a 50 ma 3.44 a 91.0% qsb15048s12 15.0 v 10.00 a 50 ma 3.47 a 90.0% qsb15048s15 24.0 v 6.50 a 50 ma 3.61 a 90.0% qsb15048s24 10-36 vdc (24 v nominal) 3.3 v 50.00 a 150 ma 7.90 a 87.0% qsb20024s3v3 5.0 v 40.00 a 150 ma 9.58 a 87.0% qsb20024s05 12.0 v 16.70 a 100 ma 9.71 a 86.0% qsb20024s12 15.0 v 13.30 a 100 ma 9.67 a 86.0% qsb20024s15 24.0 v 8.30 a 100 ma 9.54 a 87.0% qsb20024s24 18-75 vdc (48 v nominal) 3.3 v 40.00 a 80 ma 3.13 a 88.0% qsb20048s3v3 5.0 v 40.00 a 80 ma 4.69 a 89.0% qsb20048s05 12.0 v 16.70 a 60 ma 4.74 a 88.0% qsb20048s12 15.0 v 13.30 a 60 ma 4.72 a 88.0% qsb20048s15 24.0 v 8.30 a 60 ma 7.72 a 88.0% qsb20048s24 18-36 vdc (24 v nominal) 3.3 v 70.0 a 130 ma 10.94 a 88.0 % qsb35024s3v3 5.0 v 70.0 a 250 ma 16.29 a 89.5 % qsb35024s05 12.0 v 29.2 a 220 ma 15.96 a 91.5% qsb35024s12 24.0 v 14.6 a 40 ma 16.22 a 90.0% qsb35024s24 28.0 v 12.5 a 50 ma 16.03 a 91.0% qsb35024s28 (5) 48.0 v 7.3 a 60 ma 16.22 a 90.0% qsb35024s48 (5) 36-75 vdc (48 v nominal) 3.3 v 70.0 a 80 ma 5.41 a 89.0% qsb35048s3v3 5.0 v 70.0 a 120 ma 8.01 a 91.0% qsb35048s05 12.0 v 29.2 a 100 ma 7.89 a 92.5% qsb35048s12 24.0 v 14.6 a 40 ma 7.98 a 91.5% qsb35048s24 28.0 v 12.5 a 30 ma 7.88 a 92.5% qsb35048s28 (5) 48.0 v 7.3 a 60 ma 7.93 a 92.0% qsb35048s48 (5) notes notes 1. ripple & noise is measured with a 10 f tantalum capacitor and 1.0 f ceramic capacitor across output. 2. logic compatibility: ref to -ve input. module on = open circuit. module off = <0.8 vdc. 3. add suffix n to the model number to receive the unit with negative logic remote on/off. 4. input current specified at 24 v for 10-36 vdc models and 48 v for 18-75 vdc models. 5. add an external capacitor of 100 f minimum to maintain specified regulation. bottom view (48.3) 1.90 2.28 (57.9) 1.14 (29.0) 1.20 (30.5) 1.40 2.00 1 0.60 (35.6) (50.8) (15.2) 3 2 4 mounting hole diameter: 0.126 (3.2) clearance hole 0.18 min. 2.40 side view (13.2) 0.52 9 6 7 8 5 (61.0) (4.6) ? 0.04 (1.02) pins 2,3, 6,7 & 8 ? 0.08 (2.03) pins 1,4, 5 & 9 pin connections pin function 1 +vin 2 remote on/off 3 case 4 -vin 5 -vout 6 -sense 7 trim 8 +sense 9 +vout 1. dimensions are in inches (mm) 2. tolerances: x.xx = 0.02 (x.x = 0.5) x.xxx = 0.01 (x.xx = 0.25) 3. weight: 0.25 lbs (114 g) approx mechanical details
dcdc 31-march-14 application notes qsb150350 thermal resistance information voltage trim up connect trim resistor rtrim between trim pin and -sense pin. where: r trim up/down is the external resistor in k ? . vnom is the nominal output voltage. vdes is the desired output voltage. r1, r2, r3 and vr are internal to the unit and are defined in the table below. voltage trim down connect trim resistor rtrim between trim pin and +sense pin voltage trim up - voltage trim up, connect trim resistor rtrim between trim pin and +sense pin. voltage trim down - connect trim resistor rtrim between trim pin and Csense pin r trim up = v des - v nom r2 x r3 (k) r2 + r3 - r1 vr - vf r2 r2 + r3 r trim down = v nom - v des - r2 (k ) r1 x (v des - vr) r trim down = k - 10.22 511 % v nom - v des v nom where: %= x 100 r trim up = k -- k x % 511 10.22 5.11 v nom (100 + %) % v des - v nom v nom where: %= x 100 output voltage (v) r1(k ?) r2 (k ?) r3 (k ?) vr (v) vf (v) 3.3 v 3.00 12.0 4.3 1.24 0.46 5.0 v 2.32 3.3 0.0 2.5 0.0 12.0 v 9.10 51.0 5.1 2.5 0.46 15.0 v 12.0 56.0 8.25 2.5 0.46 24.0 v 20.0 100.0 7.5 2.5 0.46 output voltage trim qsb100, qsb200 & qsb350 series air flow rate typical r ca natural convection 20 ft. / min (0.1 ms) 7.12 c/w 100 ft./min (0.5 ms) 6.21 c/w 200 ft./min (1.0 ms) 5.17 c/w 300 ft./min (1.5 ms) 4.29 c/w 400 ft./min (2.0 ms) 3.64 c/w 500 ft./min (2.5 ms) 2.96 c/w 600 ft./min (3.0 ms) 2.53 c/w 700 ft./min (3.5 ms) 2.37 c/w 800 ft./min (4.0 ms) 2.19 c/w r ca = thermal resistance case to ambient 0 5 10 15 20 25 30 35 40 45 50 0 10 20 30 40 50 60 70 80 90 100 power dissipated ,pd (w) n atural convection 20 ft./min. (0.1 m/s) 100 ft./min. (0.5 m/s) 200 ft./min. (1.0 m/s) 300 ft./min. (1.5 m/s) 400 ft./min. (2.0 m/s) 500 ft./min. (2.5 m/s) 600 ft./min. (3.0 m/s) 7 00 ft./min. (3.5 m/s) 8 00 ft./min. (4.0 m/s) ambient temperature ,ta (o) maximum power dissipation vs ambient temperature and air flow without heatsink derating curve output voltage trim qsb75 & qsb150 series value qsb100/200 qsb350 k 1.225 1.24
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