specification 20 watts ? high power density ? fully regulated outputs ? efficiency to 86% ? low voltage outputs ? remote on/off ? 2:1 input range ? 2.5, 3.3 & 5 v versions we series input input voltage range ? 24 v (18-36 vdc) 48 v (36-72 vdc) input current ? see table input filter ? pi network undervoltage lockout ? turn on > 62% nominal input turn off < 61% nominal input output output v oltage ? 2.5, 3.3, 5 v single output voltage ? ?0% adjustment minimum load ? 10% line regulation ? ?.2% max load regulation ? ?.0% max for 25% to 100% load change transient response ? <500 ? for a 25% step load change ripple & noise ? 75mv pk-pk max, 20mhz bw overcurrent protection ? 110-140% of nominal short circuit protection ? continuous temperature ? ?.02 /?max coefficient remote on/off ? on > 5.5 vdc or open circuit of f < 1.8 vdc, control common referenced to -vin xppower.com general ef ficiency ? see table isolation ? 500 vdc input to output switching frequency ? 500 khz typical mtbf ? 1,500 khrs to mil-hdbk-217f environmental operating temperature ? -40 ?c to +70 ?c case t emperatur e ? +100 ?c max storage temperature ? -40 ?c to +100 ?c emi/rfi ? six-sided continuous shield emc & safety emissions ? en55022, level a conducted en55022, level a radiated esd immunity ? en61000-4-2, level 2 perf criteria a radiated immunity ? en61000-4-3 3 v/m perf criteria a conducted immunity ? en61000-4-6 3 v rms perf criteria a d c - d c
we series 1-dec-06 mechanical details d c - d c models and ratings input voltage (1) output voltage output current input current (2) efficiency model number no load full load 18-36 vdc 2.5 vdc 5000 ma 35 ma 645 ma 81% we320 3.3 vdc 5000 ma 45 ma 828 ma 83% we300 5.0 vdc 4000 ma 45 ma 981 ma 84% we301 36-72 vdc 2.5 vdc 5000 ma 25 ma 318 ma 82% we420 3.3 vdc 5000 ma 35 ma 410 ma 84% we400 5.0 vdc 4000 ma 35 ma 485 ma 86% we401 notes 1. nominal input voltage is 24 vdc for we3xx model numbers and 48 vdc for we4xx model numbers. 2. input current is at nominal input voltage. pin connections pin function 1 remote on/off 2 -v input 3 +v input 4 trim 5 -v output 6 +v output all dimensions are in inches (mm) weight: 0.08 lbs (35 g) approx. case material: copper with non-conductive base typical resistor values t o t rim up 6k8 = +10% 100k = +1% t o t rim down 6k8 = -10% 100k = -1% 2.00 (50.8) 0.40 (10. 2) 0.22 (5.6) min 3 6 5 4 2 1 1.00 (25.4) 0.20 (5.1) 0.20 (5.1) 0.40 (10. 2) 0.40 ( 10. 2) 0.40 ( 10. 2) 0.20 (5.1) 0.04 (1 .0) 1.80 (45.7) 0.10 ( 2.5 4) 0.10 ( 2.5 4) bottom view trim down + vout (6) + vout (5) + vout (5) trim (4) + vout (6) trim (4) trim up + vout (5) + vout (6) trim (4)
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