for more information, please visit the product page. ????????? ?????????????????? cui .com date 01/03/2014 page 1 of 6 series: vfk400w description: dc-dc converter date 01/03/2014 page 1 of 6 features ? up to 400 w isolated output ? rugged metal enclosure with integrated heat sink ? 4:1 input range (10~36 vdc, 18~75 vdc) ? single output from 12~48 vdc ? 1,500 vdc isolation ? over current, over temperature, over voltage, and short circuit protection ? remote on/off ? efficiency up to 87% part number key vfk400w - q xx - s xx input voltage output voltage base number model input voltage output voltage output current output power ripple and noise 1 ef ciency range (vdc) (vdc) max (a) max (w) max (mvp-p) max (%) vfk400w-q24-s12 10~36 12 33.3 400 200 87 VFK400W-Q24-S24 10~36 24 16.7 400 240 86 vfk400w-q24-s48 10~36 48 8.3 398 480 86 vfk400w-q48-s12 2 20~75 12 33.3 400 200 87 vfk400w-q48-s24 18~75 24 16.7 400 240 86 vfk400w-q48-s48 18~75 48 8.3 398 480 86.5 note: 1. ripple and noise are measured at full load, 20 mhz bw with 10 f tantalum capacitor and 1 f ceramic capacitor across the output. the 48 vdc output models require a 22uf aluminum capacitor and a 1uf ceramic capacitor across the output. 2. an external input capacitor of 470uf is recommended to reduce input ripple voltage.
for more information, please visit the product page. ?????????????????? cui .com cui inc series: vfk400w description: dc-dc converter date 01/03/2014 page 2 of 6 input parameter conditions/description min typ max units operating input voltage 24 vdc input 10 24 36 vdc 48 vdc input 12 vdc output model 24/48 vdc output models 20 18 48 48 75 75 vdc vdc under voltage shutdown 24 vdc input power up power down 9.5 8.5 vdc vdc 48 vdc input power up power down 17.8 15.5 vdc vdc ctrl 1 positive logic models on (>3.5 vdc or open circuit) models off (0~1.2 vdc) lter pi lter note: 1. open collector refer to -vin output parameter conditions/description min typ max units maximum output capacitance for all models 2,200 f line regulation measured from high line to low line 1 % load regulation measured from full load to zero load 1 % voltage accuracy 1.5 % adjustability 90 105 % switching frequency 250 khz transient response 25% step load change 500 s temperature coef cient 0.03 %/c protections parameter conditions/description min typ max units short circuit protection continuous over current protection % nominal output current 110 150 % over voltage protection 115 140 % over temperature protection shutdown 110 c safety and compliance parameter conditions/description min typ max units isolation voltage for 1 minute: input to output; input to case; output to case 1,500 vdc isolation resistance 10 m rohs 2011/65/eu (ce) environmental parameter conditions/description min typ max units operating temperature see derating curves -40 85 c storage temperature -55 105 c
for more information, please visit the product page. ?????????????????? cui .com cui inc series: vfk400w description: dc-dc converter date 01/03/2014 page 3 of 6 38.93 1.533 111.29 4.382 11 1 2 4 5 6 3 7 8 9 10 12 13 116.92 4.603 7.831 198.90 5.118 130.00 4.50 0.177 (4 plcs) 127.00 5.000 mechanical parameter conditions/description min typ max units dimensions 198.90 x 127.00 x 38.93 (7.831 x 5.000 x 1.533 inch) mm case material steel and aluminum extrusion weight 1.18 kg mechanical drawing pin connections pin function 1, 2 +vin 3, 4 -vin 5 on/off 6 case 7, 8 +vout 9+s 10 trim 11 -s 12, 13 -vout units: mm[inch] tolerance: x.x = 0.5[0.02] x.xx = 0.25[0.010] wire range: 22~12 awg screw size: #6-32
for more information, please visit the product page. ?????????????????? cui .com cui inc series: vfk400w description: dc-dc converter date 01/03/2014 page 4 of 6 derating curves 80% 100% 120% f nominal output natural convection 0.5 m/s (100lfm) 1.0 m/s (200lfm) 1.5 m/s (300lfm) 0% 20% 40% 60% 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 relative output power - % o f (300lfm) 2.0 m/s (400lfm) 2.5 m/s (500lfm) 3.0 m/s (600lfm) 3.5 m/s (700lfm) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature - degrees c 80% 100% 120% f nominal output natural convection 0.5 m/s (100lfm) 1.0 m/s (200lfm) 1.5 m/s (300lfm) 0% 20% 40% 60% 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 relative output power - % o f (300lfm) 2.0 m/s (400lfm) 2.5 m/s (500lfm) 3.0 m/s (600lfm) 3.5 m/s (700lfm) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature - degrees c vfk400w power derating curves at nominal input (includes vfk400w-q24-s12 and all 48 vdc input models) vfk400w power derating curves at nominal input (includes VFK400W-Q24-S24 and vfk400w-q24-s48)
for more information, please visit the product page. ?????????????????? cui .com cui inc series: vfk400w description: dc-dc converter date 01/03/2014 page 5 of 6 1. output voltage trimming leave open if not used. 101% 102% 103% 104% 105% 12 2.2 1.6 1.2 0.82 0.68 24 4.3 3.3 2.2 1.6 1.5 48 10 6.8 4.8 3.9 3.5 90% 92% 94% 96% 98% 12 9 12 22 51 100 24 12 22 51 100 300 48 22 32 49 100 300 note: all speci cations measured at 25c, nominal input voltage, and full load unless otherwise noted. note: 1. vfk400w-q48-s12 model requires minimum input voltage of 21.6 vdc in order to trim between 100~105%. application notes +vin r trim-down r-load trim +vo +sense +sense -sense -sense -vin -vo trim up +vin -vin -vo +vo r trim-up r-load trim trim down figure 1 table 1 table 2 application circuit for trim pin trim up resistor values (m ) 1 trim down resistor values (k ) desired vout (%vout) desired vout (%vout) nom. vout (vdc) nom. vout (vdc)
for more information, please visit the product page. ????????? cui inc series: vfk400w description: dc-dc converter date 01/03/2014 page 6 of 6 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 devi ce 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 03/13/2012 1.01 updated adjustability range 09/20/2012 1.02 corrected weight 12/18/2012 1.03 updated spec 04/01/2013 1.04 added trimming information 01/03/2014 the revision history provided is for informational purposes only and is believed to be accurate. revision history
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