for more information, please visit the product page. ????????? ?????????????????? cui .com page 1 of 10 series : vfb400w description: dc-dc converter date page 1 of 10 features ? 400 w isolated output ? industry standard full brick package ? 4:1 input range (9~36, 18~75 vdc) ? single regulated outputs from 5vdc to 48 vdc ? 1,500 vdc isolation ? over current protection, over voltage protection, input under voltage lockout protection, and over temp. protection ? remote on/off ? without tantalum capacitors inside ? efficiency up to 90% model input voltage output voltage output current output power ripple and noise 1 effciency typ (vdc) range (vdc) (vdc) max (a) max (w) max (mvp-p) typ (%) vfb400w-q24-s5 24 9~36 5 80 400 100 87.5 VFB400W-Q24-S12 24 9~36 12 33.3 400 120 86 vfb400w-q24-s24 24 9~36 24 16.7 400 240 87 vfb400w-q24-s28 24 9~36 28 14.3 400 280 87 vfb400w-q24-s48 24 9~36 48 8.3 400 480 86.5 vfb400w-q48-s5 48 18~75 5 80 400 100 89 vfb400w-q48-s12 48 18~75 12 33.3 400 120 88.5 vfb400w-q48-s24 48 18~75 24 16.7 400 240 90 vfb400w-q48-s28 48 18~75 28 14.3 400 280 90 vfb400w-q48-s48 48 18~75 48 8.3 400 480 89.5 notes: 1. ripple and noise measured at full load, 20 mhz bw with 10f tantalum capacitor and 1f ceramic capacitor across output. the 48 vdc output models require a 10f aluminum capacitor and 1f ceramic capacitor across the output 2. an external input capacitor of 1000f for 24 vdc input models and 330f for 48 vdc input models is recommended to reduce input ripple voltage. vfb400w - q xx - s xxx part number key output voltage input voltage base number remote on/off control "blank" = positive logic n = negative logic date 01/30/2014
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 2 of 10 input parameter conditions/description min typ max units operating input voltage 24 vdc input models 48 vdc input models 9 18 24 48 36 75 vdc vdc under voltage shutdown 24 vdc input power up power down 8.5 7.5 vdc vdc 48 vdc input power up power down 17 15 vdc vdc over voltage shutdown 24 vdc input power up power down 40 42 vdc vdc 48 vdc input power up power down 80 83 vdc vdc start-up time 250 ms ctrl positive logic models on (0~0.01 ma) models off (1.0~10 ma) negative logic models on (1.0~10 ma) models off (0~0.01 ma) flter pi flter input fuse 80a time delay fuse for 24 vin models, 40a time delay fuse for 48 vin models output parameter conditions/description min typ max units output capacitance 1 5v output models 12v output models 24v and 28v output models 48v output models 680 330 330 100 10,000 10,000 4,700 2,200 f f f f line regulation 1 from low line to high line 0.2 % load regulation 1 from full load to no load 0.5 % voltage accuracy 1 1.5 % load share accuracy 2 from 50~100% load 10 % adjustability 80 110 % switching frequency 230 khz transient response 25% load step change 500 s temperature coeffcient 0.03 %/c power good (ioc) vout ready: low level, sink current vout not ready: open drain output, applied voltage 20 50 ma v auxiliary output voltage/current 10 3 vdc, 20 ma max. note: 1. minimum capacitor values are required on the output to maintain the specifed regulation. 2. excludes 5 vdc output models. protections parameter conditions/description min typ max units short circuit protection continuous over current protection 110 150 % over voltage protection 115 140 % over temperature protection shutdown 110 c
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 3 of 10 safety and compliance parameter conditions/description min typ max units isolation voltage for 1 minute, input to output, input to case, or output to case 1,500 vdc isolation resistance 10 m? safety approvals ul 60950 mtbf at full load, 25 c, as per mil-hdbk-217f 340,000 hours rohs 2011/65/eu (ce) environmental parameter conditions/description min typ max units operating case temperature see derating curve -40 100 c storage temperature -55 110 c humidity non-condensing 95 % solderability parameter conditions/description min typ max units wave soldering see wave soldering profle 260 c mechanical parameter conditions/description min typ max units dimensions 4.60 x 2.40 x 0.50 (116.8 x 61.0 x 12.7 mm) inch case material aluminum baseplate with plastic case weight 220 g 0 50 10 0 15 0 20 0 25 0 30 0 02 04 06 08 01 00 12 01 40 160 180 time (seconds) t emper ature (c) notes: 1. soldering materials: sn/cu/ni 2. ramp up rate during preheat: 1.4c/s (from 50c to 100c) 3. soaking temperature: 0.5c/s (from 100c to 130c), 6020 seconds 4. peak temperature: 260c, above 250c for 3~6 seconds 5. ramp down rate during cooling: -10c/s (from 260c to 150c)
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 4 of 10 mechanical drawing 5 6 7 8 9 10 -v o -v o +v o -v o -v o +v o +v o 11 12 14 13 15 16 4 3 2 1 mo unt in g in se rts 3. 5 thro ugh 4p l. 4. 60[11 6.8] 0. 50[1 2. 7] 0.22 [5.5 ] on /o ff +v in -v in -s +s tr im pc /n c io c au x - + 0.19 9[5.05 ] 4.20[ 106. 7] 1. 70 1[ 13.2 0] 1.30 1[33 .0 4] 0. 90 1[ 22.8 8] 0. 751[ 19 .07] 4. 09 9[10 4.11 ] 3.94 9[10 0.30 ] 3.799[ 96.4 9] 3.64 9[92. 68] 3. 499[ 88.8 7] 3.34 9[85. 06 ] 2.40 [6 1. 0] 0.90 0[ 22 .8 6] 0. 400[ 10.1 6] 1.40 0[35 .5 6] 0. 501[ 12.7 2] 0. 20 [5 .1 ] 2.00 [5 0. 8] 2. 25 1[ 57.1 7] 3. 5m m no n th ro ug h ho le 2. 4m m pl at ed th ro ug h ho le 4. 8m m pa d si ze 1. 4m m pl at ed th ro ug h ho le 2. 8 mm pa d si ze pcb la yo ut top view pin connections pin function 1 -vin 2 +vin 3 -on/off 4 +on/off 5 +vo 6 +vo 7 +vo 8 -vo 9 -vo 10 -vo 11 -s 12 +s 13 trim 14 pc/nc 15 ioc 16 aux units: inch[mm] tolerance: x.xx = 0.02[0.5] x.xxx = 0.010[0.25] pin diameter tolerance: 0.004[0.1]
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 5 of 10 100 -4 0 -1 0 30 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 01 00 te m perat ure ( w ) load na tu ra l co nv ec ti on 4 00 ft ./mi n. 8 00 ft ./mi n. 64% 100 -4 0 -1 5 27 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 0 100 te m perat ure ( w ) load na tu ra l co nv ec ti on 4 00f t./ mi n. 8 00 ft ./mi n. 61% 100 -4 0 -2 0 24 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 0 100 te m perat ure ( w ) load na tu ra l co nv ec ti on 4 00f t./ mi n. 8 00 ft ./mi n. 59% 100 -4 0 -2 5 20 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 01 00 te m perat ure ( w ) load na tu ra l co nv ec ti on 4 00f t./ mi n. 8 00 ft ./mi n. 64% 100 -4 0 -1 5 27 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 0 100 te m perat ure ( w ) load na tu ra l co nv ec ti on 4 00f t./ mi n. 8 00 ft ./mi n. 61% derating curves vfb400w-q24-s5 derating curves vfb400w-q24-s24 derating curves vfb400w-q24-s48 derating curves VFB400W-Q24-S12 derating curves vfb400w-q24-s28 derating curves
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 6 of 10 100 -4 0 6 40 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 01 00 te m perat ure ( w ) load na tu ra l c onv ec ti on 400 ft ./mi n. 800 ft ./mi n. 79% 100 -4 0 15 46 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 01 00 te m perat ure ( w ) load na tu ra l c onv ec ti on 400f t./ mi n. 800 ft ./mi n. 82% -4 0 100 11 43 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 01 00 te m perat ure ( w ) load na tu ra l c onv ec ti on 400f t./ mi n. 800 ft ./mi n. 78% 100 -4 0 1 37 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 01 00 te m perat ure ( w ) load na tu ra l c onv ec ti on 400f t./ mi n. 800 ft ./mi n. 71% -4 0 100 15 46 0% 20% 40% 60% 80% 100% 120% -4 0- 30 -2 0- 10 01 02 03 04 05 06 07 08 09 01 00 te m perat ure ( w ) load na tu ra l c onv ec ti on 400f t./ mi n. 800 ft ./mi n. 82% derating curves ( continued ) vfb400w-q48-s5 derating curves vfb400w-q48-s24 derating curves vfb400w-q48-s48 derating curves vfb400w-q48-s12 derating curves vfb400w-q48-s28 derating curves
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 7 of 10 figure 1 standard parallel connection figure 3 n+1 redundant connection figure 2 parallel connection with programmed and adjustable output figure 4 n+1 redundant connection with programmed output and adjustable output voltage +s +v -v -s pc +s +v -v -s pc l o a d +s +v -v -s pc t rim t rim +s +v -v -s pc l o a d +s +v -v -s pc +s +v -v -s pc l o a d tr im tr im +s +v -v -s pc +s +v -v -s pc l o a d application notes 1. parallel operation the vfb400w series (excluding the 5 vdc output models), are designed for parallel operation. when in parallel the load current can be shared equally between the two modules by connecting their pc pins. the vfb400w can be setup in two different modes to achieve parallel operation. the standard parallel operation is suitable when load cannot be handled by a single unit, whereas the n+1 redundant operation is suitable for loads when backup power is required.
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 8 of 10 (a) controlling the on/off terminal from the input side. recommended r1 value is 12k? (1.0w) for 48v in and 6k? (0.5w) for 24v in (b) controlling the on/off terminal from the output side. recommended r2 value is 4.3k? (0.1w) 1k aux -s -on/of f +on/ of f sw ou tp ut i(on/o ff) r2 figure 6 external dc voltage figure 7 figure 8 application notes (continued) +s +v -v -s vr rt rt rt rt vf + + + = 33 33 7. 8 6 ) 33 33 ( ) ( 1. 4 2 vf vr vo vo ut + =) ( v t v o vo ut = 2. output voltage trimming leave open if not used. 3. on/off control the converter's on/off function can be controlled from the input side or from the output side. the maximum current through the on/off pin is 10ma. the resistor value has to be set appropriately to avoid the maximum current through the on/off pins. figure 5 external resistors trim-up/trim-down formulas trim-up/trim-down formulas note: rt = 6.8 k? v o is the nominal output voltage v out is the desired output voltage (up or down) vr is the trim resistor in k? note: v t is the trim terminal voltage v o is the nominal output voltage v out is the desired output voltage (up or down) note: 1. models vfb400w-q24-s24, s28 & s48 require a minimum input voltage of 13 vdc and models vfb400w-q48-s24, s28 & s48 require a minimum input voltage of 22 vdc in order to trim between 100~110%.
for more information, please visit the product page. ?????????????????? cui .com cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 9 of 10 figure 9 internal aux power figure 10 external dc power application notes (continued) 4. ioc signal normal and abnormal operation of the converter can be monitored by using the i.o.c signal. output of this signal monitor is located at the secondary side and is open collector output, you can use the signal by the internal aux power supply or the the external dc supply as the following figures. the ground reference is the Csense. this signal is low when the converter is normally operating and high when the converter is disabled or when the converter is abnormally operating. 5. test confguration notes: 1. all specifcations measured at nominal line, full load, and 25c unless otherwise specifed. 2. remote on/off control has to be connected for the converter to operate. 3. if the remote sense feature is not to be used, the +sense pin should be connected to the +vout pin and the -sense pin should be connected to the -vout pin. au x ioc -s au x ioc dc -s figure 11 table 1 +v out a v r1 +vin +s trim c2 a load -s -v out -v in -on/off +on/off c1 dc recommended external components c1 < 0.7 ? esr 1000 f/50 v (24 vin models) 330 f/100 v (48 vin models) c2 choose according to the output capacitance (see page 2)
for more information, please visit the product page. ????????? cui inc series : vfb400w description: dc-dc converter date 01/30/2014 page 10 of 10 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 safet y 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 01/30/2014 the revision history provided is for informational purposes only and is believed to be accurate. revision history
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