for more information, please visit the product page. ????????? ?????????????????? cui .com date 07/01/2013 page 1 of 5 series: veft1-d-smt description: dc-dc converter date 07/01/2013 page 1 of 5 features ? 1 w isolated output ? industry standard 12 pin smt package ? dual unregulated outputs ? 3,000 v isolation ? short circuit protection ? ul safety approvals (some models) ? wide temperature (-40~85c) ? efficiency up to 80% rohs model input voltage output voltage output current output power ripple and noise 1 effciency typ (vdc) range (vdc) (vdc) min (ma) max (ma) max (w) max (mvp-p) typ (%) veft1-s5-d12-smt 5 4.5~5.5 12 5 42 1 75 78 VEFT1-S12-D9-SMT 12 10.8~13.2 9 6 56 1 75 76 veft1-s12-d12-smt 12 10.8~13.2 12 5 42 1 75 78 veft1-s12-d15-smt 12 10.8~13.2 15 4 33 1 75 79 veft1-s24-d5-smt 24 21.6~26.4 5 10 100 1 75 79 veft1-s24-d9-smt 24 21.6~26.4 9 6 56 1 75 80 veft1-s24-d12-smt 24 21.6~26.4 12 5 42 1 75 80 veft1-s24-d15-smt 24 21.6~26.4 15 4 33 1 75 80 notes: 1. ripple and noise are measured at 20 mhz bw part number key veft1 - s xx - d xx -smt - x input voltage output voltage base number packaging style package options "blank" = standard tr = tape & reel discontinued
for more information, please visit the product page. ?????????????????? cui .com cui inc series: veft1-d-smt description: dc-dc converter date 07/01/2013 page 2 of 5 input parameter conditions/description min typ max units operating input voltage 5 v model 12 v model 24 v model 4.5 10.8 21.6 5 12 24 5.5 13.2 26.4 vdc vdc vdc output parameter conditions/description min typ max units line regulation for vin change of 1% 1.2 % load regulation measured from 10% load to full load 5 v model 9 v model 12 v model 15 v model 12.8 8.3 6.8 6.3 15 10 10 10 % % % % voltage accuracy see derating curves switching frequency 100% load, 5 and 12 v input 100% load, 24 v input 100 500 khz khz temperature coeffcient 0.03 %/c protections parameter conditions/description min typ max units short circuit protection 1 s safety and compliance parameter conditions/description min typ max units isolation voltage for 1 minute at 1 ma max. 3,000 vdc isolation resistance at 500 vdc 1,000 m? safety approvals 1 ul mtbf 3,500,000 hours rohs compliant yes notes: 1. vef t1-s5-d12 and veft1-s12-d9/12/15 only environmental parameter conditions/description min typ max units operating temperature -40 85 c storage temperature -55 125 c storage humidity non-condensing 95 % temperature rise at full load 15 25 c refow soldering see refow soldering profle 260 c te mperature (c) 250 200 150 100 50 0 90 sec. max (>220c) 220c peak te mperature 260c for 10 sec. max ti me (seconds) discontinued
for more information, please visit the product page. ?????????????????? cui .com cui inc series: veft1-d-smt description: dc-dc converter date 07/01/2013 page 3 of 5 mechanical parameter conditions/description min typ max units dimensions 15.24 x 11.20 x 6.50 (0.600 x 0.441 x 0.256 inch) mm case material plastic (ul94-v0) weight 1.71 g 0.25 [0 .0 10 ] 6.50 [0 .2 56] 15 .2 4[ 0.60 0] 12 .7 0[ 0.50 0] 2.54 [0 .1 00] 7.50 [0.2 95 ] 11 .2 0[ 0.441] 0.25 [0 .0 10] 1. 35 [0.0 53] 5 max 8.50 [0.3 35] 1.00 [0 .0 39 ] 2. 54 [0 .1 00 ] 2.54 [0 .1 00 ] 2. 10 [0.0 83] 8 10 12 11 53 12 7 6 6. 25 [0.2 46] a a 10.1 0[ 0. 39 8] 8 10 11 53 12 7 6 12 0. 60 [0.0 24 ] front view top view to p view pcb layout mechanical drawing pin connections pin function 1 gnd 2 +vin 5 0 v 6 -vo 8 +vo others nc units: mm [inches] tolerance: 0.25 [0.010] pin section tolerance: 0.10 mm [0.004] +10% +5% output current (%) nominal vo ltage 50% output vo ltate (%) 10% 100% +2.5% -2.5% -7.5% 100 80 60 40 20 ambient temperature (c) load (%) -40- 20 02 04 06 0 85 105 120 derating curves 1. output power vs. ambient temperature 2. output voltage vs. output current discontinued
for more information, please visit the product page. ?????????????????? cui .com cui inc series: veft1-d-smt description: dc-dc converter date 07/01/2013 page 4 of 5 1. requirement on output load in order to ensure the product operates effciently and reliably, make sure the specifed range of input voltage is not exceeded and the minimum output load is not less than 10% load. if the actual load is less than the specifed minimum load, the output ripple ma y increase sharply while its effciency and reliability will reduce greatly. if the actual output power is very small, please add an appropriate resistor as extra loading. 2. overload protection under normal operating conditions, the output circuit of these products has no protection against over-current and short-circuits. the simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit. 3. filtering in some circuits which are sensitive to noise and ripple, a fltering capacitor may be added to the dc/dc output end and input end to reduce the noise and ripple. however, the capacitance of the output flter capacitor must be proper. if the capacitance is too big, a startup problem might arise. for every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its flter capacitor sees the external capacitor table. t o get an extremely low ripple, an l c fltering network may be connected to the input and output ends of the dc/dc converter, which may produce a more signifcant fltering effect. it should also be noted that the inductance and the frequency of the lc fltering network should be staggered with the dc/dc frequency to avoid mutual interference (figure 1). 4. output voltage regulation and over-voltage protection circuit the simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat protection that is connected to the input or output end in series (figure 2). 5. external capacitor table it is not recommended to connect any external capacitor in the application feld with less than 0.5 w output. vi n gnd +v o 0v dc ci n l l dc l co ut co ut -v o vin (vdc) cin (f) vout (vdc) cout (f) 5 4.7 5 4.7 12 2.2 9 2.2 24 1 12 1 -- -- 15 1 table 1 figure 1 application notes figure 2 vi n gnd 0v +v ou t dc dc -v ou t re g re g re g note: all specifcations measured at 25c, humidit y <75%, nominal input voltage, and full load unless otherwise noted. discontinued
for more information, please visit the product page. ????????? cui inc series: veft1-d-smt description: dc-dc converter date 07/01/2013 page 5 of 5 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 be 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 04/09/2009 1.01 new template applied 04/12/2012 1.02 v-infnity branding removed 09/05/2012 1.03 added tr package option 11/01/2012 1.04 discontinued veft1-s5-d5-smt, veft1-s5-d9-smt, veft1-s5-d15- smt, and veft1-s12-d5-smt models 07/01/2013 the revision history provided is for informational purposes only and is believed to be accurate. revision history discontinued
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