date 10/26/2011 page 1 of 4 SERIES: VMS-20 │ DESCRIPTION: AC-DC POWER SUPPLY FEATURES • • • • • • • • up to 21.6 W continuous power compact size universal input (90 ~ 264 Vac) single output from 3.3 to 24 V no load power < 0.3W over voltage and short circuit protections full medical safety approvals efficiency up to 85% RoHS output voltage output current output power ripple and noise1 efficiency (Vdc) max (A) max (W) max (mVp-p) typ (%) 3.3 4.0 13.2 50 75 VMS-20-5 5 4.0 20.0 50 80 VMS-20-9 9 2.3 20.7 90 81 VMS-20-12 12 1.7 20.4 100 83 VMS-20-15 15 1.4 21.0 100 84 VMS-20-24 24 0.9 21.6 100 85 MODEL VMS-20-3.3 Notes: 1. Measured at 20MHz, with 0.1uF ceramic and 10uF electrolytic capacitors PART NUMBER KEY VMS-20 - XX Base Number Output Voltage cui.com CUI Inc │ SERIES: VMS-20 │ DESCRIPTION: AC-DC POWER SUPPLY date 10/26/2011 page 2 of 4 INPUT parameter conditions/description min voltage 90 frequency 47 typ input current inrush current at 230 Vac, cold start at 25 °C max units 264 Vac 63 Hz 0.5 A 40 A max units ±0.5 % ±1 % OUTPUT parameter conditions/description line regulation low line to high line, full load load regulation 10% to 100% full load hold-up time 115 Vac min switching frequency typ 10 ms 100 KHz PROTECTIONS parameter conditions/description min over voltage protection short circuit protection typ 115 max units 140 % max units continuous SAFETY & COMPLIANCE parameter conditions/description min isolation voltage input to output safety approvals UL60601-1, IEC60601-1, EN60601-1 EMI/EMC EN60601-1/EN61204-3/EN55022/CISPR Class B, EN55024 typ 5,656 Vdc leakage current 0.1 RoHS compliant yes MTBF MIL-HDBK-217F, GB 400,000 mA hrs ENVIRONMENTAL parameter conditions/description operating temperature see derating curve min storage temperature operating humidity typ max units -25 70 °C -40 85 °C 93 % max units non-condensing MECHANICAL parameter conditions/description min dimensions 2.38 x 1.60 x 0.80 (60.5 x 40.6 x 20.4 mm) weight cooling method typ inch 50 free air convection (see derating curves below) cui.com g CUI Inc │ SERIES: VMS-20 │ DESCRIPTION: AC-DC POWER SUPPLY date 10/26/2011 page 3 of 4 DERATING CURVES output power vs. ambient temperature Load (%) 100 80 (Natural Convection) 60 40 20 -30 -20 0 10 20 30 40 50 60 70 Ambient Temperature (°C) MECHANICAL DRAWING units: mm[in] TOLERANCE: mm: X.X = ±0.5 ; X.XX = ±0.25 inch: X.XX = ±0.02 ; X.XXX = ±0.01 60.5 2.38 54.00 2.126 -Vo 40.6 1.60 ACN 30.32 1.194 20.32 0.800 +Vo 10.32 0.406 ACL 3.06 0.120 20.40 0.803 MAX 17.00 0.669 2.00 0.079 MAX 1.80 0.071 1.00 0.039 3.40 0.134 3.80 0.150 cui.com 2.82 0.111 CUI Inc │ SERIES: VMS-20 │ DESCRIPTION: AC-DC POWER SUPPLY date 10/26/2011 page 4 of 4 REVISION HISTORY rev. 1.0 description date initial release 10/26/2011 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.