dc-dc converters 20 w dc-dc converters 1 2 year warranty cxa20 series single and dual output ? 4:1 input voltage range ? no minimum load on singles ? 6 a on 3.3 v output (@ 48 vin) at 50 ?c in still air ? wide operating temperature with overtemperature protection ? 10% output voltage trim ? remote on/off control ? overvoltage protection ? available rohs complaint the cxa20 is a new 20 w addition to the cxa family of open-frame, isolated, dc-dc converters. the five model series features a 4:1 input voltage range of 18 vdc to 75 vdc, making it suitable for a wide variety of communications and distributed power applications. with its 2.0 x 1.6 inch industry standard footprint, the cxa20 provides an easy upgrade option for new and existing artesyn customers seeking a high-performance, cost-effective power supply. the cxa20 is available in output voltages of 3.3 v, 5 v, 12 v, 5 v and 12 v. the 3.3 v version delivering up to 6 a is fully rated to 20 w. typical efficiency for the cxa20 is 83%. the cxa20 offers remote on/off as well as overvoltage, overtemperature and short circuit protection features. all specifications are typical at nominal input, full load at 25 c unless otherwise stated emc characteristics ets 300 386-1 table 5 conducted emissions en55022, ext. cap. (note 5) level a en55022, external filter, level b vde0878, 48v models radiated emissions en55022-b see app. note 107 immunity: esd air en61000-4-2 8 kv (np), 15 kv (rp) esd contact en61000-4-2 6 kv (np), 8 kv (rp) eft dc power en61000-4-4 2 kv (np), 4 kv (lfs) eft signal en61000-4-4 1 kv (np), 2 kv (lfs) radiated field enclosure en61000-4-3 10 v/m (np) surges indoor signal en61000-4-5 500 v (rp) conducted (dc power) en61000-4-6 10 v (np) conducted (signal) en61000-4-6 10 v (np) input transients ets 300 132-2, etr 283 general specifications efficiency see table overtemp. shutdown 120 ?c isolation voltage input/output test voltage 1500 vdc switching frequency fixed 400 khz approvals and standards en60950 (see notes 6,7,8) ul1950 file no. e136005 material flammability ul94v-0 weight 26 g (0.92 oz) mtbf mil-hdbk-217f 3,485,000 hours (representative model parts stress method 48s05j @ 48 vin) ground benign @ 25 c environmental specifications thermal performance operating ambient -40 c to +60 c, temperature (see note 9) non-operating -55 c to +125 c ets 300 019-2-3 classes t3.1, 3.2, 3.3, 3.5 air temperature low: iec 68-2-1 -40 c high: iec 68-2-2 +60 c change: iec 68-2-14 -40 c to +60 c relative humidity iec 68-2-56 10% to 100% rh iec 68-2-30 condensation output specifications voltage accuracy 1.0% line regulation singles/dual positives 0.1% (ll to hl) dual negatives 0.1% load regulation full load to minimum load (not incl. cross reg.) s3v3 0.2% singles/dual positives 0.1% dual negatives 0.1% minimum load singles none duals (for imbalanced loads) 10% ripple and noise s3v3, s05, d05 75 mv pk-pk max. 20 mhz bandwidth s12, d12 100 mv pk-pk max. all models 20 mv rms max. temperature coefficient 0.02%/c overvoltage protection see application note 107 short circuit protection hiccup continuous short <20 m ? automatic recovery transient response 25% load step 2.0% max. dev., 300 s recovery to within total error band load cross regulation 10% load to full load, 7.0% (see note 1) either output input specifications input voltage range 48 vin nominal 18-75 vdc input fuse hrc recommended 2.0 a max. input rise 48 v ets300-132 5 v/ms and fall time uvlo turn on voltage (see note 4) 92% uvlo turn off voltage (see note 4) 86% remote on/off logic compatibility cmos/ttl/open collector on open circuit or >2 vdc off <1.2 vdc specifications file name: cxa20.pdf rev (02): 09 dec 2005
for the most current data and application support vi sit www.artesyn.com/power group/products.htm n n o o t t e e s s 1 negative output voltage deviation when either load is changed. 2 for tvs/zener specifications please see application note 107. 3 on dual output models, ovp protection is on positive outputs only. 4 with respect to minimum input voltage. 5 with one external 4 f capacitor across the input. 6 unit provides basic insulation up to the 75 vdc maximum input voltage. 7 maximum continuous output power not to exceed 20 watts. 8 user must provide 2 a hrc (recommended) in line fuse in order to comply with safety approvals. 9 download application note 107 and the full data sheet from our website. 10 the j suffix indicates that these parts are pb-free (rohs 6/6) compliant. tse rohs 5/6 (non pb-free) compliant versions may be available on special request, please contact your local sales representative for details. 11 notice: some models do not support all options. please contact your local artesyn representative or use the on-line model number search tool at http://www.artesyn.com/powergroup/products.htm to find a suitable alternative. cxa20 series single and dual output dc-dc converters 20 w dc-dc converters 2 file name: cxa20.pdf rev (02): 09 dec 2005 caution: hazardous internal voltages and high temperatures. ensure that unit is not user accessible. input output overvoltage output typical model voltage voltage protection (2,3) current (max.) efficiency number (10,11) 18-75 vdc 3.3 v 3.7 v 6 a 80% cxa20-48s3v3j 18-75 vdc 5 v 6.67 v 4 a 83% cxa20-48s05j 18-75 vdc 12 v 14.25 v 1.66 a 83% cxa20-48s12j 18-75 vdc 5 v 6.67 v 2 a ea. 84% CXA20-48D05J 18-75 vdc 12 v 14.25 v 0.83 a ea. 84% cxa20-48d12j pin connections pin number single output dual output 1 + input + input 2 C input - input 3 no pin no pin 4 remote on/off remote on/off 5 no pin + output 6 + output common 7 - output - output 8 trim trim derating curve output current vs temperature s3v3j natural convection (<0.1 m/s airflow) -40?c 0 20 40 60 80 100 ambient temperature rated output current -20?c 0? 20? 40? 60? 80? 100? 75% max. temperatures for full rated output current model full vin range vin <60 vdc 48s3v3j 50 ?c 50 ?c 48s05j 55 ?c 60 ?c 48s12j 50 ?c 55 ?c 48d05j 55 ?c 60 ?c 48d12j 50 ?c 60 ?c trim down + output trim up trim - output external output trimming all models can be externally trimmed by 10% using either method shown below. see application note 107 for details. international safety standard approvals ul/cul can/csa 22.2 no. 60950-00 : ul 60950 file no. e174104 vde certificate no.112836. file no. 10401-3336-0154 cb report and certificate to iec60950, licence no. 121914
stand-offs 4 places ?0.040 0.002 (?1.02 0.05) 2.00 0.02 (50.80 0.5) 1.80 (45.72) 1 all dimensions in inches (mm) general tolerance 0.010 ( 0.25) unless otherwise specified 2 4 5 6 7 8 0.02 0.004 (0.50 0.1) 1.60 0.02 (40.64 0.5) 0.70 (17.78) 0.20 (5.08) 0.10 (2.54) 0.30 (7.62) 0.70 (17.78) 0.50 (12.70) 0.60 (15.24) 0.14 0.02 (3.60 0.5) 0.413 (10.50) max. open frame height bottom view datasheet ? artesyn technologies ? 2005 the information and specifications contained in this datasheet are believed to be correct at time of publication. however, arte syn technologies accepts no responsibility for consequences arising from printing errors or inaccuracies. specifications are subject to change without notice. no rights under any patent accompany the sale of any such product(s) or information contained herein. for the most current data and application support vi sit www.artesyn.com/power group/products.htm cxa20 series single and dual output dc-dc converters 20 w dc-dc converters 3 please consult our website for the following items: application note longform data sheet www.artesyn.com file name: cxa20.pdf rev (02): 09 dec 2005
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