page 1 of 2 single-output, 300 watts vws300 dc-dc series data sheet rev. apr 16, 2004 vws dc/dc converters are industry-standard full-bricks. featuring a fixed frequency design, the vws offers excellent transient response and predictable emi performance. the vws can be combined with vwb booster modules to provide increased power. vws converters use 100% surface-mount construction, along with planar magnetics, and are fully compatible with production board washing processes. description features ? 300w standard full-brick ? industry-standard footprint ? open-frame packaging ? 100c baseplate operation ? planar magnetics ? superior transient response ? 1500v isolation ? vwb booster modules available technical specifications voltage range 24 vdc nominal 18 - 36 vdc 48 vdc nominal 36 - 72 vdc input reflected ripple current 50 ma pk-pk undervoltage lockout - turn on / turn off 17-15 vdc /35-32 vdc input output setpoint accuracy 1% line regulation v in min. - v in max., i out rated 0.2% v out load regulation i out min. - i out max., v in nom. 0.2% v out remote sense headroom 0.5 vdc minimum output current 10 % i out rated dynamic regulation, loadstep 25% i out pk deviation 4% v out settling time 500 ms voltage trim range 10% current limit threshold range, % of i out rated 110 - 140% ovp trip range 120 - 140% v out nom. ovp type self recovering short circuit/overcurrent protection shutdown/hiccup turn-on time 10 ms remote shutdown positive logic remote shutdown reference v in negative switching frequency 500 khz isolation input - output 1500 vdc input - case 1050 vdc output - case 500 vdc temperature coefficient 0.03 %/c case temperature operating range -40 to +100c storage range -40 to +125c thermal shutdown range 105 - 115c vibration, 3 axes, 5 min each 5 g, 10 - 55 hz mtbf ? (bellcore tr-nwt-000332) consult factory safety ul, cul, tuv weight (approx.) 6.0 oz general ? mtbf predictions may vary slightly from model to model. specifications typically at 25c, normal line, and full load, unless otherwise stated. soldering conditions: i/o pins, 260c, ten seconds; fully compatible with commercial wave-soldering equipment. safety: agency approvals may vary from model to model. please consult factory for specific model information. notes 75 80 85 90 10 20 30 40 50 60 70 80 90 100 load % efficiency % eff. (36v ) eff. (48v ) eff. (75v ) efficiency vs. load (48v input)
page 2 of 2 single-output, 300 watts vws300 dc-dc series data sheet rev. apr 16, 2004 model input voltage input voltage maximum input output rated output ripple & noise typical (volts) range (volts) current (amps)* voltage (volts) current (amps) pk-pk (mv) efficiency** vws250yh-a 24 18-36 21.0 12 20.8 120 81% vws250yj-a 24 18-36 21.0 15 16.7 150 81% vws250yk-a 24 18-36 21.0 24 10.4 200 82% vws250y28-a 24 18-36 21.0 28 8.9 200 82% VWS250YL-A 24 18-36 21.0 48 5.2 200 84% vws300zh-a 48 36-72 10.5 12 25.0 120 85% vws300zj-a 48 36-72 10.5 15 20.0 150 84% vws300zk-a 48 36-72 10.5 24 12.5 200 85% vws300z28-a 48 36-72 10.5 28 10.7 200 86% notes: advanced product release - consult factory. * maximum input current at minimum input voltage, maximum rated output power. ** at nominal v in , rated output. mechanical drawing model selection vws 5 6 7 8 9 1 2 3 4 dia 0.080" (2.0mm) 4pl 5pl dia 0.040 " (1.0mm) 1.700"(43.2mm) 1.000"(25.4mm) 1.400"(35.6mm) 0.400"(10.2mm) 0.700"(17.8mm) 0 (4.6mm) 0.18" 0.50" (12.7mm) (0.6mm) 0.025" ref. -0.50"(-12.7mm) -0.300"(-7.6mm) 4.60" (116.8mm) 2.40" (61.0mm) mounting inserts m3x.5 through 4pl bottom view 0 -0.19" (-4.8mm) 4.200" (106.7mm) thermal impedance natural convection 5.4 c/w 100 lfm 3.8 c/w 200 lfm 2.5 c/w 300 lfm 1.7 c/w 400 lfm 1.6 c/w note: thermal impedance data is dependent on many environmental factors. the exact thermal performance should be validated for specific application. 1-v in 2 gate out 3 gate in 4+v in 5-v out 6 -sense 7 trim 8 +sense 9+v out pin function tolerances inches: (millimeters) .xx 0.040 .x 0.5 .xxx 0.010 .xx 1.0 pin: 0.002 0.05 (dimensions as listed unless otherwise specified.) model numbers highlighted in yellow or shaded are not recommended for new designs.
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