cui .com date 09/06/2012 page 1 of 5 series: vsk-s20-t description: ac-dc power supply model output voltage output current output power ripple and noise ef ciency (vdc) max (a) max (w) max (mvp-p) max (%) vsk-s20-3r3u-t 3.3 4.1 14 100 73 vsk-s20-5u-t 5 3.5 18 100 75 VSK-S20-9U-T 9 2.1 19 100 77 vsk-s20-12u-t 12 1.6 19 100 81 vsk-s20-15u-t 15 1.3 20 100 83 vsk-s20-24u-t 24 0.85 20 100 85 part number key vsk-s20- xx u-t output voltage base number example of 20 w, single output features ? up to 20 w continuous output ? encapsulated compact case ? output short circuit protection ? over current protection ? thermal protection ? ce, ul safety approval ? regulated output ? universal input (85~264 vac) ? efficiency up to 85% rohs
cui .com date 09/06/2012 page 2 of 5 cui inc series: vsk-s20-t description: ac-dc power supply input parameter conditions/description min typ max units voltage 85 120 264 370 vac vdc frequency 47 63 hz input current at 110 vac at 230 vac 330 180 ma ma inrush current at 110 vac at 230 vac 16 30 a a recommended external input fuse 3.15 a / 250 v, slow-blow type output parameter conditions/description min typ max units voltage set accuracy 2 % line regulation 0.5 % load regulation at 10~100% load 1 % minimum load 0% hold-up time at 230 vac 80 ms temperature coef cient 0.02 %/c switching frequency 65 khz protections parameter conditions/description over voltage protection 3.3 and 5 v models 9 v model 12 and 15 v models 24 v model 7.5 12 20 30 vdc vdc vdc vdc overload protection 110 % short circuit protection shutdown and auto restart safety & compliance parameter conditions/description min typ max units isolation voltage for 1 minute 3,000 vac safety approvals en 60950-1, iec 60950-1, ul 60950-1 safety class class i emi/emc cispr22/en 55022 class b, iec/en 61000-4-(2, 3, 4, 5) leakage current at 230 vac, 50 hz 0.3 ma mtbf at 25c, max. load 300,000 hours rohs compliant yes environmental parameter conditions/description min typ max units operating temperature -40 70 c storage temperature -40 105 c case temperature 90 c humidity non-condensing 85 %
cui .com date 09/06/2012 page 3 of 5 cui inc series: vsk-s20-t description: ac-dc power supply mechanical drawing > @ > @ > @ > @
> @ > @ > @ > @ to p vi ew side view mechanical parameter conditions/description min typ max units dimensions 3.783 x 2.126 x 1.26 (96.1 x 54 x 32 mm) inch weight 170 g derating curves ambient temperature (c) load (%) 100 80 60 50 40 20 -40 -30 -20 -10 0 10 50 60 70 ambient temperature (c) load (%) 100 80 60 50 40 20 -40 -30 -20 -10 0 10 50 60 70 input voltage (vac) load (%) 100 80 60 50 40 20 70 85 110 125 210 225 240 264 1. output power vs. ambient temperature 2. output power vs. input voltage 5 v model all other models units: mm [inches] tolerance: 0.50 [0.020] pin connections pin function 1 gnd 2 ac(n) 3 ac(l) 4-vo 5nc 6 trim 7nc 8+vo
cui .com date 09/06/2012 page 4 of 5 cui inc series: vsk-s20-t description: ac-dc power supply typical efficiency curves vin = 230 vac 50 55 60 65 70 75 80 85 90 95 10 20 30 40 50 60 70 80 90 100 load (%) efficiency (%) vsk-s20-5u-t vsk-s20-24u-t load = 100% 70 72 74 76 78 80 82 84 86 88 90 85 120 240 264 input voltage (vac) vsk-s20-5u-t vsk-s20-24u- t efficiency (%) typical application circuit fuse c1 c2 tvs1 rl +v o -vo l n l n ntc nf c8 c9 c7 mov l n ntc l n load fuse notes: 1. output ltering capacitors c1, c2 and c3 are electrolytic capacitors, it is recommended to use high frequency and low impedance electr olytic capacitors. for capacitance and current of capacitor please refer to manufacture?s datasheet. voltage derating of capacitor should be 80% or a bove. tvs is recommended component to protect post-circuits (if converter fails). 2. 0.1 f is recommended for c1. 3. if a higher requirement to emc performance is required it is recommended to add and ?emc lter? at the input end, recommended parameter are as follows: mov: varistor is used to protect the device under surge. c7,c8:y capacitor, recommended parameter 2200pf/400v; c9:x capacitor, recommended parameter 0.1 f/275v; nf: common model choke, recommended inductance is about 10mh-30mh. emc filter (see note 3) parallel lines copper sheet load connect oscillograph probe fuse vsk +vo -v o 3 2 n l c2 c1 25.4mm 25.4mm c1:10f c2:0.1f external capacitors typical value ( unit: f) model c1 vsk-s20-3r3u-t 330 vsk-s20-5u-t 330 VSK-S20-9U-T 220 vsk-s20-12u-t 220 vsk-s20-15u-t 220 vsk-s20-24u-t 220
date 09/06/2012 page 5 of 5 cui inc series: vsk-s20-t description: ac-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 trim application and calculation application circuit for trim (part in broken line is the interior of the models) 0v r 2 r 1 r 3 v ref r t trim +v o t 0v r 2 r 1 r 3 v ref r t trim +v o t trim up trim down formula for resistance of trim up: a= vre f vot-vref r 1 r= t a r 2 r-a 2 -r 3 down: a= vre f vot-vref r 2 r= t ar 1 r-a 1 -r 3 note: value for r1, r2, r3 and vref refer to the following table. r t : resistance of trim a: user-defined parameter, no actual meanings. vo(v) resistance 3.3 5 12 15 24 r1(k) 23.3 3.8 7.5 8.6 r2(k) 1.2 3.3 11.51 r3(k) 111 1 1 1.24 2.5 2.5 2.5 2.5 vot(v) output voltage of trim, variation ?10 % vref(v) rev. description date 1.0 initial release 09/06/2012 the revision history provided is for informational purposes only and is believed to be accurate. revision history
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