dc-dc specification 20 watts ? 4:1 input range ? -40 c to +100 c operating temperature ? single & dual outputs ? overvoltage & overcurrent protection ? high efficiency - up to 91% ? standard remote on/off ? 1600 vdc isolation jtm20 series input input voltage range ? 24 v (9-36 vdc) 48 v (18-75 vdc) input current ? see table undervoltage lockout ? 24 v models: on 8.6 v, off 7.9 v typical 48 v models: on 17.8 v, off 16 v typical input surge ? 24 v models 50 vdc for 100 ms 48 v models 100 vdc for 100 ms output output voltage ? see table output voltage trim ? 10% voltage balance ? 1% max dual models, balanced load minimum load ? no minimum load required for single output models, 10% required for dual output models line regulation ? 0.5% max load regulation ? single output models: 0.5% max dual output models: 1% max balanced outputs cross regulation ? 5% for dual outputs, see note 2 setpoint accuracy ? 1% start up time ? 20 ms typical ripple & noise ? single output models: 75 mv pk-pk dual output models: 75 mv pk-pk at 20 mhz bw, see note 3 transient response ? 3% max deviation, recovery to within 1% in <250 s for a 25% load change temperature ? 0.02%/c coefficient overvoltage protection ? 3.3 v models: 3.9 v typical 5 v models: 6.2 v typical 12 v models: 15 v typical 15 v models: 18 v typical 5 v models: 6.2 v typical 12 v models: 15 v typical 15 v models: 18 v typical overload protection ? >120% short circuit protection ? trip & restart (hiccup mode), auto recovery remote on/off ? on = logic high (<3.0 v) or open off = logic low (<1.2 v) or short pin 2 to 6 see note 5 xppower.com general efficiency ? see table isolation ? 1600 vdc input to output 1600 vdc input to case 1600 vdc output to case switching frequency ? 330 khz typical mtbf ? 560 khrs min per mil-hdbk-217f environmental operating temperature ? -40 c to +105 c, see derating curve case temperature ? +105 c max cooling ? convection-cooled operating humidity ? 5-95% rh, non-condensing storage temperature ? -40 c to +125 c emc & safety emissions ? en55022, class a conducted & radiated with external components - see application notes esd immunity ? en61000-4-2, level 2 perf criteria b radiated immunity ? en61000-4-3 10 v/rms, perf criteria a eft/burst ? en61000-4-4 level 3, perf criteria b* surge ? en61000-4-5 level 2, perf criteria b* conducted immunity ? en61000-4-6 10 v/m,perf criteria a magnetic field ? en61000-4-8 1 a/m, perf criteria a safety approvals ? en60950-1, iec60950-1 *see note 4.
27-nov-08 dc-dc jtm20 models and ratings input voltage output voltage output current input current (1) maximum capacitive load efficiency model number no load full load 9-36 vdc 3.3 vdc 5.500 a 50 ma 879 ma 10,000 f 89% jtm2024s3v3 5.0 vdc 4.000 a 50 ma 957 ma 6,800 f 91% jtm2024s05 12.0 vdc 1.670 a 22 ma 980 ma 1,000 f 89% jtm2024s12 15.0 vdc 1.330 a 22 ma 968 ma 680 f 89% jtm2024s15 5.0 vdc 2.000 a 65 ma 969 ma 2,200 f 89% jtm2024d05 12.0 vdc 0.835 a 25 ma 980 ma 470 f 88% jtm2024d12 15.0 vdc 0.665 a 25 ma 980 ma 330 f 89% JTM2024D15 18-75 vdc 3.3 vdc 5.500 a 30 ma 440 ma 10,000 f 89% jtm2048s3v3 5.0 vdc 4.000 a 30 ma 473 ma 6,800 f 91% jtm2048s05 12.0 vdc 1.670 a 15 ma 484 ma 1,000 f 89% jtm2048s12 15.0 vdc 1.330 a 15 ma 484 ma 680 f 89% jtm2048s15 5.0 vdc 2.000 a 40 ma 484 ma 2,200 f 89% jtm2048d05 12.0 vdc 0.835 a 15 ma 490 ma 470 f 88% jtm2048d12 15.0 vdc 0.665 a 15 ma 490 ma 330 f 89% jtm2048d15 notes 1. input currents specified at nominal 24 v or 48 v input. 2. cross regulation is 5% when one output is at 100% and the other is varied between 25% and 100%. 3. measured with 1 f ceramic capacitor across output rails. 4. external input capacitor required nippon chemi-con ky series 220 f/100 v or equivalent. 5. non-standard versions can have remote on/off function and pin removed. 1.00 (25.40) 2.00 (50.80) 0.60 (15.24) 0.80 (20.32) 0.60 (15.24) 0.40 (10.16) 0.20 (5.08) 0.40 (10.16) 0.10 (2.54) 0.40 (10.16) 0.40 (10.16) 0.10 (2.54) 3 4 12 6 5 bottom view 0.40 (10.16) dia. 0.04 (1.00) 0.20 (5.08) min mechanical details application notes all dimensions are in inches (mm) weight: 0.07 lbs (30 g) -40 -20 0 10 20 30 40 50 60 70 80 90 100 110 20 40 60 80 100 ambient temperature (o) load (%) 0 derating curve external output trim trim up 4 5 trim down 3 4 pin connections pin single dual 1 +vin +vin 2 -vin -vin 3 +vout +vout 4 trim com 5 -vout -vout 6 remote on/off remote on/off remote on/off control standard rof logic is positive. output on >3.0 vdc or open circuit output off <1.2 vdc or short circuit pins 2 & 6 notes 1. all dimensions are in inches (mm). 2. pin diameter: 0.04 0.002 (1.0 0.05) 3. pin pitch tolerance: 0.014 (0.35) 4. case tolerance: 0.02 (0.5) input filter dc/dc converter +vin +vout load c1 c2 l -vin -vout model c1 l c2 24 vdc 2.2 f, 100 v 12 h 2.2 f, 100 v 48 vdc 2.2 f, 100 v 12 h 2.2 f, 100 v
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