For more information, please visit the product page. date 01/30/2014 page 1 of 10 SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER 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 noise1 efficiency 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 10μF tantalum capacitor and 1μF ceramic capacitor across output. The 48 Vdc output models require a 10μF aluminum capacitor and 1μF ceramic capacitor across the output 2. An external input capacitor of 1000μF for 24 Vdc input models and 330μF for 48 Vdc input models is recommended to reduce input ripple voltage. PART NUMBER KEY VFB400W - QXX - SXXX Base Number Input Voltage cui.com Output Voltage Remote On/Off Control "blank" = positive logic N = negative logic For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 2 of 10 INPUT parameter conditions/description operating input voltage 24 Vdc input models 48 Vdc input models min typ max units 9 18 24 48 36 75 Vdc Vdc 24 Vdc input power up power down 8.5 7.5 Vdc Vdc 48 Vdc input power up power down 17 15 Vdc Vdc 24 Vdc input power up power down 40 42 Vdc Vdc 48 Vdc input power up power down 80 83 Vdc Vdc under voltage shutdown over voltage shutdown start-up time positive logic CTRL negative logic 250 ms models ON (0~0.01 mA) models OFF (1.0~10 mA) models ON (1.0~10 mA) models OFF (0~0.01 mA) filter pi filter input fuse 80A time delay fuse for 24 Vin models, 40A time delay fuse for 48 Vin models OUTPUT parameter conditions/description min output capacitance 5V output models 12V output models 24V and 28V output models 48V output models 680 330 330 100 line regulation1 load regulation1 1 typ max units 10,000 10,000 4,700 2,200 μF μF μF μF from low line to high line ±0.2 % from full load to no load ±0.5 % ±1.5 % voltage accuracy 1 load share accuracy 2 from 50~100% load ±10 adjustability 80 switching frequency transient response 230 25% load step change temperature coefficient power good (IOC) Vout ready: low level, sink current Vout not ready: open drain output, applied voltage auxiliary output voltage/current 10 ±3 Vdc, 20 mA max. Note: % 110 % KHz 500 μs ±0.03 %/°C 20 50 mA V max units 150 % 1. Minimum capacitor values are required on the output to maintain the specified regulation. 2. Excludes 5 Vdc output models. PROTECTIONS parameter conditions/description short circuit protection continuous min over current protection 110 over voltage protection over temperature protection typ 115 shutdown 140 110 cui.com % °C For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 3 of 10 SAFETY AND COMPLIANCE parameter conditions/description isolation voltage for 1 minute, input to output, input to case, or output to case min UL 60950 MTBF at full load, 25 °C, as per MIL-HDBK-217F RoHS 2011/65/EU (CE) max units 1,500 Vdc 10 MΩ 340,000 hours isolation resistance safety approvals typ ENVIRONMENTAL parameter conditions/description min max units operating case temperature see derating curve -40 100 °C -55 110 °C 95 % max units 260 °C storage temperature humidity typ non-condensing SOLDERABILITY parameter conditions/description wave soldering see wave soldering profile min typ Notes: 1. 2. 3. 4. 5. Temperature (°C) 300 Soldering materials: Sn/Cu/Ni Ramp up rate during preheat: 1.4°C/s (from 50°C to 100°C) Soaking temperature: 0.5°C/s (from 100°C to 130°C), 60±20 seconds Peak temperature: 260°C, above 250°C for 3~6 seconds Ramp down rate during cooling: -10°C/s (from 260°C to 150°C) 250 200 150 100 50 0 0 20 40 MECHANICAL parameter conditions/description min dimensions 4.60 x 2.40 x 0.50 (116.8 x 61.0 x 12.7 mm) case material aluminum baseplate with plastic case weight 60 80 100 Time (Seconds) typ 140 160 max 180 units inch 220 cui.com 120 g For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 4 of 10 MECHANICAL DRAWING units: inch[mm] tolerance: X.XX = ±0.02[±0.5] X.XXX = ±0.010[±0.25] pin diameter tolerance: ±0.004[±0.1] 4.099[104.11] 3.949[100.30] 3.799[96.49] 3.649[92.68] 3.499[88.87] 3.349[85.06] PIN CONNECTIONS +Vo 8 -Vo 9 -Vo 10 -Vo 11 -S 12 +S 13 TRIM 14 PC/NC 15 IOC 16 AUX - + 2 -Vo 7 3 4 6 5 0.199[5.05] 4.20[106.7] Mounting Inserts 3.5 Through 4Pl. 4.60[116.8] 2.4mm P LAT E D T HR OUG H HOLE 4.8mm P AD S IZE 3.5mm NON T HR OUG H HOLE 1.4mm P LAT E D T HR OUG H HOLE 2.8mm P AD S IZE PCB Layout Top View cui.com -Vo +Vo +Vo +Vo 2.40[61.0] 7 +Vin -Vo 2.00[50.8] 2.251[57.17] +Vo 8 -Vo 0.20[5.1] 6 9 0.900[22.86] +Vo -Vin 1.400[35.56] 5 10 1 0.501[12.72] +ON/OFF 0.400[10.16] -ON/OFF 4 ON/OFF 3 0.751[19.07] +Vin 0.50[12.7] -Vin 2 0.22[5.5] 1 16 AUX 15 IOC 14 PC/NC 13 TRIM 12 +S 11 -S Function 1.701[13.20] 1.301[33.04] 0.901[22.88] Pin For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 5 of 10 DERATING CURVES VFB400W-Q24-S5 Derating Curves VFB400W-Q24-S12 Derating Curves 120% 100% 120% -10 -40 30 100% 60% 64% 40% 60% 40% Natural Convection 400 ft./min. 20% 0% -40 -30 -20 -10 800 ft./min. 100 0 10 20 30 40 50 60 70 80 90 0% -40 100 -30 -10 0 10 20 30 40 50 60 70 80 Temperature (ɗ) VFB400W-Q24-S24 Derating Curves VFB400W-Q24-S28 Derating Curves 90 100 120% -15 -40 27 100% 27 -15 -40 80% Load 80% 60% 61% 60% 61% 40% 40% Natural Convection Natural Convection 400ft./min. 20% 0% -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 VFB400W-Q24-S48 Derating Curves -20 24 80% 60% 59% 40% Natural Convection 400ft./min. 800 ft./min. 0% -40 -30 -20 -10 100 0 10 20 30 40 0% -40 -30 -20 -10 100 0 10 20 30 40 Temperature (ɗ) 120% 20% 800 ft./min. 100 Temperature (ɗ) -40 400ft./min. 20% 800 ft./min. Load -20 100 Temperature (ɗ) 120% Load 400ft./min. 20% 800 ft./min. 100% 20 64% Natural Convection 100% -25 80% Load Load 80% -40 50 60 70 80 90 100 Temperature (ɗ) cui.com 50 60 70 80 90 100 For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 6 of 10 DERATING CURVES (CONTINUED) VFB400W-Q48-S5 Derating Curves VFB400W-Q48-S12 Derating Curves 120% 120% 100% 40 6 -40 79% 40% 60% 71% 40% Natural Convection Natural Convection 400 ft./min. 20% 0% -40 -30 -20 -10 800 ft./min. 100 0 10 20 30 40 50 60 70 80 90 0% -40 100 -30 0 10 20 30 40 50 60 70 80 VFB400W-Q48-S24 Derating Curves VFB400W-Q48-S28 Derating Curves 90 100 120% 15 -40 46 100% -40 46 15 80% 82% Load 82% 60% 60% 40% 40% Natural Convection Natural Convection 400ft./min. 20% 0% -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 120% 11 -40 43 100% 80% 78% 40% Natural Convection 400ft./min. 800 ft./min. -30 -20 -10 100 0 10 20 30 40 0% -40 -30 -20 -10 100 0 10 20 30 40 Temperature (ɗ) VFB400W-Q48-S48 Derating Curves 0% -40 800 ft./min. 100 Temperature (ɗ) 20% 400ft./min. 20% 800 ft./min. Load -10 Temperature (ɗ) 80% 60% -20 100 Temperature (ɗ) 120% Load 400ft./min. 20% 800 ft./min. 100% 37 80% Load Load 80% 60% 1 -40 100% 50 60 70 80 90 100 Temperature (ɗ) cui.com 50 60 70 80 90 100 For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 7 of 10 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. Figure 1 Standard Parallel Connection Figure 2 Parallel Connection With Programmed And Adjustable Output +S +S +V +V -V -S PC -V -S TRIM PC L O A D +S +S +V +V -V -S TRIM PC -V -S PC Figure 3 N+1 Redundant Connection Figure 4 N+1 Redundant Connection With Programmed Output And Adjustable Output Voltage +S +S +V +V -V -S -V -S TRIM PC +S +V L O A D L O A D PC +S +V -V -S -V -S PC TRIM PC cui.com L O A D For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 8 of 10 APPLICATION NOTES (CONTINUED) 2. Output Voltage Trimming Leave open if not used. Figure 5 External Resistors Trim-Up/Trim-Down Formulas +S 1.24 ×( VR Vf = +V 7.68 +( Rt ×33 ) Rt + 33 Rt ×33 ) Rt + 33 -V Vout = (Vo + VR) × Vf -S Note: Rt = 6.8 KΩ VO is the nominal output voltage VOUT is the desired output voltage (up or down) VR is the trim resistor in KΩ Figure 6 External DC Voltage Trim-Up/Trim-Down Formulas Vout = VT × VO Note: VT is the trim terminal voltage VO is the nominal output voltage VOUT 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%. 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. 3. (A) Controlling the ON/OFF terminal from the input side. Recommended R1 value is 12KΩ (1.0W) for 48VIN and 6KΩ (0.5W) for 24VIN (B) Controlling the ON/OFF terminal from the output side. Recommended R2 value is 4.3KΩ (0.1W) Figure 7 Figure 8 AUX R2 Output -S cui.com 1k SW +ON/OFF I(ON/OFF) -ON/OFF For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 9 of 10 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 –Sense. This signal is LOW when the converter is normally operating and HIGH when the converter is disabled or when the converter is abnormally operating. Figure 9 Internal AUX Power 5. Figure 10 External DC Power AUX AUX IOC IOC -S -S DC Test Configuration Figure 11 A DC Notes: +Vin C1 V R1 Table 1 Recommended External components +Vout +S +ON/OFF -ON/OFF TRIM -Vin -Vout -S C2 A Load C1 < 0.7 Ω ESR 1000 μF/50 V (24 Vin models) 330 μF/100 V (48 Vin models) C2 Choose according to the output capacitance (see page 2) 1. All specifications measured at nominal line, full load, and 25°C unless otherwise specified. 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. cui.com For more information, please visit the product page. CUI Inc │ SERIES: VFB400W │ DESCRIPTION: DC-DC CONVERTER date 01/30/2014 │ page 10 of 10 REVISION HISTORY rev. 1.0 description date initial release 01/30/2014 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com [email protected] 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.