For more information, please visit the product page. date 11/01/2012 page 1 of 5 SERIES: VWRAT2 │ DESCRIPTION: DC-DC CONVERTER 2 W isolated output wide input (2:1) industry standard 16 pin SMT package style dual regulated outputs 1,500 V isolation short circuit protection wide temperature (-40~85°C) efficiency up to 78% U • • • • • • • • ED FEATURES input voltage MODEL typ (Vdc) range (Vdc) (Vdc) 12 9~18 ±5 output current output power ripple and noise1 efficiency min (mA) max (mA) max (W) typ (mVp-p) typ (%) ±20 ±200 2 35 74 TI VWRAT2-D12-D5-SMT output voltage N RoHS VWRAT2-D12-D9-SMT 12 9~18 ±9 ±11 ±111 2 35 78 VWRAT2-D12-D12-SMT 12 9~18 ±12 ±8 ±83 2 35 78 VWRAT2-D12-D15-SMT 12 9~18 ±15 ±7 ±67 2 35 78 VWRAT2-D24-D5-SMT 24 18~36 ±5 ±20 ±200 2 35 74 ±9 24 ±11 ±111 2 35 79 24 18~36 ±12 ±8 ±83 2 35 78 VWRAT2-D24-D15-SMT 24 18~36 ±15 ±7 ±67 2 35 78 1. ripple and noise are measured at 20 MHz BW O Notes: 18~36 N VWRAT2-D24-D9-SMT VWRAT2-D24-D12-SMT D IS C PART NUMBER KEY VWRAT2 - DXX - DXX -SMT - X Output Voltage Base Number Input Voltage Package Options "blank" = standard TR = Tape & Reel Packaging Style cui.com For more information, please visit the product page. CUI Inc │ SERIES: VWRAT2 │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 2 of 5 INPUT conditions/description operating input voltage 12 V model 24 V model min typ max units 9 18 12 24 18 36 Vdc Vdc OUTPUT parameter conditions/description line regulation measured from low line to high line min load regulation measured from 10% to 100% full load voltage accuracy positive negative refer to recommended circuit switching frequency 100% load, nominal input voltage continuous, automatic recovery SAFETY AND COMPLIANCE N conditions/description short circuit protection min TI parameter conditions/description isolation voltage tested for 1 minute, at 1 mA max. 1,500 insulation resistance at 500 Vdc 1,000 isolation capacitance input to output RoHS compliant yes parameter operating temperature storage temperature units % ±0.5 ±1 % ±1 ±3 ±3 ±5 % % 35 150 mVp-p at full load %/°C typ max units typ max units Vdc MΩ 85 lead temperature for 10 seconds pF 1,000,000 min hours typ max units -40 85 °C -55 125 °C 95 15 cui.com % °C 300 D temperature rise kHz ±0.03 non-condensing IS C storage humidity conditions/description O ENVIRONMENTAL min N parameter MTBF max ±0.5 300 temperature coefficient PROTECTIONS typ ±0.2 U ripple & noise ED parameter °C For more information, please visit the product page. CUI Inc │ SERIES: VWRAT2 │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 3 of 5 ED DERATING CURVES 100 60 40 20 0 20 40 60 71 85 MECHANICAL 100 parameter conditions/description dimensions 0.939 x 0.713 x 0.315 (23.86 x 18.10 x 8.10 mm) case material UL94-V0 epoxy resin MECHANICAL DRAWING N 8 .00[0 .31 5] (Side View) 1.02[0.040] typ max 5.2 g 10 9 16 0.50[0.020] 1 7 8 15.24[0.600] 2.54[0.100] 16 ( Top View) 1 7 8 13.7 0[0 .539 ] 2.54[0.100] 10 9 1 8.10 [0.7 13] IS C 23.86[0.939] 3.04[0.120] 1.00[0.039] PIN CONNECTIONS 18.10[0.713] 5e 0.25[0.010] 1.40±0.20 [0.055±0.008] cui.com units inch 1 7.22 [0.6 78] O 7 .50 [0.29 5] units: mm [inches] tolerance: ±0.25 [±0.010] pin section tolerance: ±0.10 mm [±0.004] D min TI weight 120 N Ambient Temperature (°C) 2.5 4[0 .100 ] -20 U -40 2.1 0[0. 083 ] Load (%) 80 PIN FUNCTION 1 GND 7 NC 8 0V 9 +Vo 10 -Vo 16 +Vin For more information, please visit the product page. CUI Inc │ SERIES: VWRAT2 │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 4 of 5 APPLICATION NOTES Requirement on Output Load In order to ensure the product operates efficiently and reliably, make sure the specified range of input voltage is not exceeded and the minimum output load is not less than 10% load. If the actual load is less than the specifi ed minimum load, the output ripple may increase sharply while its effi ciency and reliability will reduce greatly. If the actual output power is very small, please add an appropriate resistor as extra loading. 2. Recommended Circuit All VWRBT2 converters have been tested according to the following recommended testing circuit before leaving the factory. This series should be tested under load, never under no load (Figure 1). +Vo Vin Cou t Cin DC DC 0V Cou t GND U Figure 1 ED 1. -Vo N However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might arise. For every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor sees (Table 1). General: 12 V 24, 48 V Cout 10 μF / 100 mA Table 1 Vout (Vdc) Cout (μF) ±5 680 ±9 470 ±12 330 ±15 220 Input Current While using unstable power source, please ensure the output voltage and ripple voltage do not excced indexes of the converter. The preceding power source must be able to provide for converter sufficient starting current Ip. IS C O Input Current(A) General: Ip ≤1.4*Iin-max N 3. 100 μF 10 ~ 47 μF TI Cin No parallel connection or plug and play 5. Solderability reflow soldering, 240°C max. Inp ut Voltage Ra nge Input Voltage (V) D 4. Ip cui.com For more information, please visit the product page. CUI Inc │ SERIES: VWRAT2 │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 5 of 5 REVISION HISTORY description date 1.0 initial release 06/16/2008 1.01 new template applied, V-Infinity branding removed, application notes updated 09/10/2012 added TR package option 11/01/2012 1.02 ED rev. D IS C O N TI N U 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.