For more information, please visit the product page. date 09/07/2012 page 1 of 5 SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER FEATURES d 0.25 W isolated output industry standard 14 pin DIP package dual unregulated outputs 1,000 V isolation short circuit protection UL safety approvals wide temperature (-40~85°C) efficiency up to 66% RoHS output voltage typ (Vdc) range (Vdc) VASD0.25-S5-D5-DIP 5 4.5~5.5 VASD0.25-S5-D9-DIP 5 4.5~5.5 VASD0.25-S5-D12-DIP 5 4.5~5.5 5 VASD0.25-S12-D5-DIP 12 VASD0.25-S12-D9-DIP 12 VASD0.25-S12-D12-DIP 12 ripple and noise1 efficiency (Vdc) max (mA) max (W) max (mVp-p) typ (%) ±5 ±25 0.25 75 62 ±9 ±13.8 0.25 75 64 ±12 ±10.4 0.25 75 66 4.5~5.5 ±15 ±8.3 0.25 75 65 10.8~13.2 ±5 ±25 0.25 75 62 10.8~13.2 ±9 ±13.8 0.25 75 63 10.8~13.2 ±12 ±10.4 0.25 75 64 1. ripple and noise are measured at 20 MHz BW 2. unbalanced load: ±5% co Notes: output power nt VASD0.25-S5-D15-DIP output current in input voltage MODEL ue • • • • • • • • D is PART NUMBER KEY Base Number VASD0.25 - SXX - DXX -DIP Input Voltage cui.com Output Voltage Packaging Style For more information, please visit the product page. CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER date 09/07/2012 │ page 2 of 5 INPUT parameter conditions/description min typ max units operating input voltage 5 V model 12 V model 4.5 10.8 5 12 5.5 13.2 Vdc Vdc parameter conditions/description min typ max units line regulation for Vin change of 1% 1.2 % load regulation measured from 10% load to full load 15 15 15 15 % % % % OUTPUT see derating curves switching frequency 100% load, input voltage range temperature coefficient Notes: 1. test ripple and noise by “parallel cable” method. PROTECTIONS conditions/description min in parameter ue voltage accuracy 10.5 8.3 6.8 6.3 d 5 V model 9 V model 12 V model 15 V model short circuit protection SAFETY AND COMPLIANCE kHz ±0.03 %/°C typ units 1 s max units isolation voltage for 1 minute at 1 mA max. 1,000 Vdc isolation resistance at 500 Vdc 1,000 MΩ safety approvals UL 60950-1 (E222736) 3,500,000 hours co yes nt conditions/description RoHS compliant typ max parameter MTBF min 100 ENVIRONMENTAL parameter conditions/description min typ max units operating temperature -40 85 °C storage temperature -55 125 °C storage humidity non-condensing at full load 15 is temperature rise 1.5 mm from case for 10 seconds D lead temperature cui.com 95 % 25 °C 300 °C For more information, please visit the product page. CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER date 09/07/2012 │ page 3 of 5 DERATING CURVES 1. output power vs. ambient temperature 2. output voltage vs. output current +10% 80 60 40 -40 -20 0 20 40 60 85 +2.5% Voltage -2.5% ue 20 +5% Nominal d Output Voltate (%) Load (%) 100 105 50% 10% Ambient Temperature (°C) conditions/description dimensions 0.787 x 0.394 x 0.276 (20.00 x 10.00 x 7.00 mm) min case material plastic (UL94-V0) typ in parameter weight nt MECHANICAL DRAWING units: mm [inches] tolerance: ±0.25 [±0.010] pin section tolerance: ±0.10 mm [±0.004] max 2.1 First Angle Projection co RECOMMENDED FOOTPRINT Top view,grid:2.54mm(0.1inch), diameter:1.00mm Dual Output is 7.00 [0.276] Side view 7.62 [0.300] 4.10 [0.161] D 10.00 [0.394] PIN CONNECTIONS 15.24[0.600] Bottom view cui.com PIN FUNCTION 1 GND 7 NC 8 0V 9 +Vo 11 -Vo 14 Vin units inch g 20.00[0.787] 100% Output Current (%) MECHANICAL -7.5% For more information, please visit the product page. CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER date 09/07/2012 │ 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 specified minimum load, the output ripple may increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please add an appropriate resistor as extra loading. 2. Overload Protection Under normal operating conditions, the output circuit of these products has no protection against over-current and short-circuits. The simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit. 3. Filtering In some circuits which are sensitive to noise and ripple, a filtering capacitor may be added to the DC/DC output end and input end to reduce the noise and ripple. 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 the external capacitor table. To get an extremely low ripple, an “LC” filtering network may be connected to the input and output ends of the DC/DC converter, which may produce a more significant filtering effect. It should also be noted that the inductance and the frequency of the “LC” filtering network should be staggered with the DC/DC frequency to avoid mutual interference (Figure 1). ue d 1. is co Figure 2 nt Output Voltage Regulation and Over-voltage Protection Circuit The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat protection that is connected to the input or output end in series (Figure 2). D 4. in Figure 1 cui.com For more information, please visit the product page. CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER date 09/07/2012 │ page 5 of 5 REVISION HISTORY description date 1.0 initial release 02/91/2008 1.01 new template applied; V-Infinity branding removed; VASD0.25-S12D15-DIP, VASD0.25-S24-D5-DIP, VASD0.25-S24-D9-DIP, VASD0.25S24-D12-DIP and VASD0.25-S24-D15-DIP discontinued 08/07/2012 1.02 24 V input references removed 09/04/2012 discontinued 1.03 d rev. 09/25/2012 D is co nt in ue 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.