cui .com date 10/14/2011 page 1 of 5 series: vwrbt2 description: dc-dc converter date 10/14/2011 page 1 of 5 features ? 2 w isolated output ? wide input (2:1) ? industry standard 16 pin smt package style ? single regulated outputs ? 1,500 v isolation ? short circuit protection ? wide temperature (-40~85c) ? efficiency up to 80% rohs model input voltage output voltage output current output power ripple and noise ef ciency range (vdc) (vdc) min (ma) max (ma) max (w) max (mvp-p) typ (%) vwrbt2-d12-s3.3-smt 9 ~ 18 3.3 50 500 1.65 150 70 vwrbt2-d12-s5-smt 9 ~ 18 5 40 400 2 150 74 vwrbt2-d12-s9-smt 9 ~ 18 9 22 222 2 150 76 vwrbt2-d12-s12-smt 9 ~ 18 12 16 167 2 150 78 vwrbt2-d12-s15-smt 9 ~ 18 15 13 133 2 150 79 vwrbt2-d24-s3.3-smt 18 ~ 36 3.3 50 500 1.65 150 72 vwrbt2-d24-s5-smt 18 ~ 36 5 40 400 2 150 76 vwrbt2-d24-s9-smt 18 ~ 36 9 22 222 2 150 78 vwrbt2-d24-s12-smt 18 ~ 36 12 16 167 2 150 80 vwrbt2-d24-s15-smt 18 ~ 36 15 13 133 2 150 80 notes: 1. all speci cations measured at ta=25c, humidity <75%, nominal input voltage and rated output load unless otherwise speci ed.
cui .com date 10/14/2011 page 2 of 5 cui inc series: vwrbt2 description: dc-dc converter input parameter conditions/description min typ max units operating input voltage 12 v input 24 v input 9 18 12 24 18 36 vdc vdc output parameter conditions/description min typ max units line regulation measured from low line to high line 0.2 0.5 % load regulation measured from 10% to 100% full load 0.5 1 % voltage accuracy refer to recommended circuit 1 3 % switching frequency 100% load, nominal input voltage 300 khz temperature coef cient 0.03 %/c protections parameter conditions/description min typ max units short circuit protection continuous, automatic recovery safety and compliance parameter conditions/description min typ max units isolation voltage tested for 1 minute, at 1 ma max. 1,500 vdc insulation resistance at 500 vdc 1,000 m rohs compliant yes mtbf 1,000,000 hours environmental parameter conditions/description min typ max units operating temperature -40 85 c storage temperature -55 125 c storage humidity 95 % temperature rise 100% load 15 c re ow soldering temperature for 10 seconds 245 c
cui .com date 10/14/2011 page 3 of 5 cui inc series: vwrbt2 description: dc-dc converter recommended reflow profile 1 8 7 9 10 nc +vin gnd nc +vo 0v 16 3.04[0.120] 23.86[0.939] 15.24[0.600] 2.54[0.100] 18.10[0.713] 13.7 0[0 .539 ] 0.50[0.020] 1.02[0.040] 8.00[0.315] 7.50[0.295] 0.25[0.010] 5 1.40 0.20 [0.055 0.008] 17.22[0.678] 2.54[0.100] 1.00[0.039] 2.10[0. 083] 2.54[0.100] 16 10 9 178 16 10 9 178 function pin pin connections note: unit:mm[inch] pin section tolerances: 0.10mm[ 0.004inch] general tolerances: 0.25mm[ 0.010inch] (top view) (side view) nc: no connection 18.10[0.713] mechanical drawing mechanical parameter conditions/description min typ max units dimensions 0.94 x 0.71 x 0.32 inch (23.9 x 18.1 x 8.0 mm) case material ul94v-0 epoxy resin weight 5.2 g operating temp. (c) load (%) derating curve
cui .com date 10/14/2011 page 4 of 5 cui inc series: vwrbt2 description: dc-dc converter all of the vwrbt2-smt series have been tested according to the following recommended testing circuit before leaving the factory . this series should be tested under load (figure 1). if you want to further decrease the input/output ripple, you can increase capaci tance properly or choose capacitors with low esr. however, the capacitance should not be too high (table 1). 1. requirement on output load in order to ensure the product operates ef ciently and reliably, make sure the speci ed range of input voltage is not exceeded. the minimum output load must be at least 10%. if the actual load is less than 10%, the output ripple may increase sharply while th e ef ciency and reliability will greatly reduce. 2. recommended circuit it is best to test with full load and not to test without load. to further reduce output ripple, you may increase the external capacitor, choose a capacitor with low esr. 3. input current nominal input voltage range. the input current of the power supply must be suf cient to the startup current (ip) of the dc/dc module (figure 2) ip 1.4*iin-max 4. no parallel connection or plug and play dc dc cin +vin -vin +vou t -vout single vout (vdc) cout ( f) 3.3 2,200 5 1,000 9 680 12 470 15 330 figure 1 application notes table 1 figure 2
date 10/14/2011 page 5 of 5 cui inc series: vwrbt2 description: dc-dc converter cui offers a two (2) year limited warranty. complete warranty information is listed on our website. cui reserves the right to make changes to the product at any time without notice. information provided by cui is believed to b e accurate and reliable. however, no responsibility is assumed by cui for its use, nor for any infringements of patents or other rights of third parties which may result from its use . cui products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. headquarters 20050 sw 112th ave. tualatin, or 97062 800.275.4899 fax 503.612.2383 cui .com techsupport@cui.com rev. description date 1.0 initial release 05/12/2008 1.01 updated to new template 10/04/2011 the revision history provided is for informational purposes only and is believed to be accurate. revision history
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