date 10/14/2011 page 1 of 5 SERIES: VWRBT2 │ DESCRIPTION: DC-DC CONVERTER FEATURES • • • • • • • • 2 W isolated output wide input (2:1) industry standard 16 pin SMT package style single regulated outputs 1,500 V isolation short circuit protection wide temperature (-40~85°C) efficiency up to 80% RoHS input voltage output voltage output power ripple and noise efficiency range (Vdc) (Vdc) min (mA) max (mA) max (W) max (mVp-p) typ (%) VWRBT2-D12-S3.3-SMT 9 ~ 18 3.3 50 500 1.65 150 70 VWRBT2-D12-S5-SMT 9 ~ 18 VWRBT2-D12-S9-SMT 9 ~ 18 5 40 400 2 150 74 9 22 222 2 150 76 VWRBT2-D12-S12-SMT VWRBT2-D12-S15-SMT 9 ~ 18 12 16 167 2 150 78 9 ~ 18 15 13 133 2 150 79 VWRBT2-D24-S3.3-SMT 18 ~ 36 3.3 50 500 1.65 150 72 VWRBT2-D24-S5-SMT 18 ~ 36 5 40 400 2 150 76 VWRBT2-D24-S9-SMT 18 ~ 36 9 22 222 2 150 78 VWRBT2-D24-S12-SMT 18 ~ 36 12 16 167 2 150 80 VWRBT2-D24-S15-SMT 18 ~ 36 15 13 133 2 150 80 MODEL Notes: output current 1. All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless otherwise specified. cui.com CUI Inc │ SERIES: VWRBT2 │ DESCRIPTION: DC-DC CONVERTER date 10/14/2011 │ page 2 of 5 INPUT parameter conditions/description operating input voltage 12 V input 24 V input min typ max units 9 18 12 24 18 36 Vdc Vdc OUTPUT parameter conditions/description typ max units line regulation measured from low line to high line min ±0.2 ±0.5 % load regulation measured from 10% to 100% full load ±0.5 ±1 % ±3 voltage accuracy refer to recommended circuit ±1 switching frequency 100% load, nominal input voltage 300 temperature coefficient % kHz ±0.03 %/°C PROTECTIONS parameter conditions/description short circuit protection continuous, automatic recovery min typ max units min typ max units SAFETY AND COMPLIANCE parameter conditions/description isolation voltage tested for 1 minute, at 1 mA max. 1,500 Vdc insulation resistance at 500 Vdc 1,000 MΩ RoHS compliant yes 1,000,000 hours MTBF ENVIRONMENTAL parameter max units operating temperature conditions/description min -40 typ 85 °C storage temperature -55 125 °C 95 % 245 °C storage humidity temperature rise 100% load reflow soldering temperature for 10 seconds 15 cui.com °C CUI Inc │ SERIES: VWRBT2 │ DESCRIPTION: DC-DC CONVERTER date 10/14/2011 │ page 3 of 5 DERATING CURVE Load (%) RECOMMENDED REFLOW PROFILE Operating Temp. (°C) MECHANICAL parameter conditions/description dimensions 0.94 x 0.71 x 0.32 inch (23.9 x 18.1 x 8.0 mm) min case material UL94V-0 epoxy resin typ weight max units 5.2 g 1.02[0.040] 0.50[0.020] 23.86[0.939] 3.04[0.120] 15.24[0.600] 2.54[0.100] PIN Function 1 GND 7 NC 8 NC +Vo 9 10 1 7 8 13.7 0[0 .539 ] ( Top View) 1 8.10 [0.7 13] 10 9 18.10[0.713] 10 9 1 7 8 +Vin NC: No conne ction 2.54[0.100] No te: Un it :m m [in ch] P in sectio n toler ances:±0 .10m m [ ±0.00 4inch] Gener al t olera nces:±0. 25m m [ ±0.01 0inch] 5 0.25[0.010] 16 0V 16 16 2.5 4[0 .100 ] PIN CONNECTIONS 2.1 0[0. 083 ] (Side View) 1 7.22 [0.6 78] 8 .00[0 .31 5] 7 .50 [0.29 5] MECHANICAL DRAWING 1.40±0.20 [0.055±0.008] cui.com 1.00[0.039] CUI Inc │ SERIES: VWRBT2 │ DESCRIPTION: DC-DC CONVERTER date 10/14/2011 │ page 4 of 5 APPLICATION NOTES All of the VWRBT2-SMT Series have been tested according to the following recommended testing circuit before leaving the factory. This series should be tested under load (Figure 1). If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. However, the capacitance should not be too high (Table 1). Figure 1 +Vin +Vout Cin DC Table 1 DC -Vin -Vout Single Vout (Vdc) Cout (μF) 3.3 2,200 5 1,000 9 680 12 470 15 330 1. 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. The minimum output load must be at least 10%. If the actual load is less than 10%, the output ripple may increase sharply while the efficiency and reliability will greatly reduce. 2. Recommended Circuit It is best to test with full load and not to test without load. To further reduce output ripple, you may increase the external capacitor, choose a capacitor with low ESR. 3. Input Current Nominal input voltage range. The input current of the power supply must be sufficient to the startup current (Ip) of the DC/DC module (Figure 2) IP≤1.4*Iin-max Figure 2 4. No parallel connection or plug and play cui.com CUI Inc │ SERIES: VWRBT2 │ DESCRIPTION: DC-DC CONVERTER date 10/14/2011 │ page 5 of 5 REVISION HISTORY rev. description date 1.0 initial release 05/12/2008 1.01 updated to new template 10/04/2011 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.