Additional Resources: Product Page | 3D Model | PCB Footprint date 01/08/2019 page 1 of 5 SERIES: VOF-20B DESCRIPTION: AC-DC POWER SUPPLY FEATURES * * * * * * * up to 20 W continuous power universal input: 85~264 Vac compact open-frame design single output from 5 Vdc ~ 48 Vdc short circuit, over voltage protection, over current protection 4000 Vac isolation no load power consumption <100 mW MODEL VOF-20B-S5 VOF-20B-S9 output voltage output current output power ripple and noise1 efficiency (Vdc) max (A) max (W) typ (mVp-p) typ (%) 5 3.5 17.5 100 82.85 9 2.1 18.9 100 85.70 VOF-20B-S12 12 1.6 19.2 120 85.77 VOF-20B-S15 15 1.3 19.5 150 85.85 VOF-20B-S24 24 0.85 20.4 240 86.06 VOF-20B-S48 48 0.42 20 480 86.00 Notes: 1. At full load, nominal input, 20 MHz bandwidth oscilloscope, output terminated with 10 F electrolytic and 0.1 F ceramic capacitors. 2. All specifications are measured at Ta=25C, nominal input voltage, and 75% rated output load unless otherwise specified. PART NUMBER KEY VOF-20B - SXX Base Number Output Voltage cui.com Additional Resources: Product Page | 3D Model | PCB Footprint CUI Inc SERIES: VOF-20B DESCRIPTION: AC-DC POWER SUPPLY date 01/08/2019 page 2 of 5 INPUT parameter conditions/description min max units 85 120 264 370 Vac Vdc 47 63 Hz 0.5 A 70 A leakage current 0.25 mA no load power consumption 0.10 W max units 3,500 2,100 1,600 1,300 850 420 F F F F F F voltage frequency typ current inrush current at 240 Vac, 25C, cold start OUTPUT parameter conditions/description min capacitive load 5 Vdc output model 9 Vdc output model 12 Vdc output model 15 Vdc output model 24 Vdc output model 48 Vdc output model initial set point accuracy at full load, 25C line regulation high line to low line at full load load regulation 10%~100% load 1 % hold-up time at 115 Vac 12 ms switching frequency temperature coefficient typ 2 % 0.5 % 65 kHz 0.05 %/C PROTECTIONS parameter conditions/description over voltage protection hiccup, auto recovery min over current protection short circuit protection typ max 110 units % hiccup, auto recovery SAFETY & COMPLIANCE parameter conditions/description min isolation voltage input to output safety approvals IEC62368-1/60950-1, UL62368-1/60950-1 safety class class II EMI/EMC EN 55032 Class B, FCC Part 15 Class B, EN 610006-3, EN 61000-3-2, EN 61000-3-3, EN 55024, EN 61204-3, EN 61000-6-1 MTBF as per MIL-STD-217F, at 115 Vac, 25C, GB life time at 40C, 75% load RoHS yes typ max 4,000 units Vac 300,000 hours 3 years ENVIRONMENTAL parameter conditions/description min max units operating temperature see derating curve -25 70 C -40 85 C 93 % storage temperature operating humidity typ non-condensing operating altitude 5000 cui.com m Additional Resources: Product Page | 3D Model | PCB Footprint CUI Inc SERIES: VOF-20B DESCRIPTION: AC-DC POWER SUPPLY date 01/08/2019 page 3 of 5 SOLDERABILITY conditions/description wave soldering see wave soldering profile Notes: 1. 2. 3. 4. 5. min typ max units 260 C max units Temperature (C) parameter Soldering materials: Sn/Cu/Ni Ramp up rate during preheat: 1.4C/s (from 50C to 100C) Soaking temperature: 0.5C/s (from 100C to 130C), 6020 seconds Peak temperature: 260C, above 250C for 3~6 seconds Ramp down rate during cooling: -10C/s (from 260C to 150C) Time (Seconds) MECHANICAL parameter conditions/description min dimensions 2.331 x 1.665 x 0.902 (59.20 x 42.30 x 22.90 mm) typ inch weight 42 cooling g natural convection MECHANICAL DRAWING units: inch [mm] tolerance: X.XXX = 0.020 [0.50] 2.331 59.20 PIN CONNECTIONS 1 4 0.787 20.00 +Vout 2 0.150 3.80 4 0.439 11.15 -Vout 0.902 22.90 max 3 3 0.689 17.50 max ACL 0.144 3.65 2 0.173 4.40 ACN 0.689 17.50 Function 1 1.665 42.30 PIN 0.039 1.00 2.126 54.00 cui.com Additional Resources: Product Page | 3D Model | PCB Footprint CUI Inc SERIES: VOF-20B DESCRIPTION: AC-DC POWER SUPPLY date 01/08/2019 page 4 of 5 DERATING CURVE Output Power vs. Ambient Temperature (Natural Convection) Load (%) 100 75 50 25 0 -25 -15 -5 0 5 15 25 35 45 55 65 75 Ambient Temperature (C) EFFICIENCY CURVES 9 Vdc Output Efficiency Curve (at 25C) 90.0 90.0 85.0 85.0 80.0 80.0 Efficiency (%) Efficiency (%) 5 Vdc Output Efficiency Curve (at 25C) 75.0 85 Vac 70.0 115 Vac 65.0 230 Vac 264 Vac 60.0 55.0 75.0 85 Vac 70.0 115 Vac 65.0 230 Vac 264 Vac 60.0 55.0 10 20 30 40 50 60 Current Load (%) 70 80 90 100 10 20 90.0 90.0 85.0 85.0 80.0 80.0 75.0 70.0 85 Vac 65.0 230 Vac 115 Vac 264 Vac 60.0 55.0 10 60 70 80 90 100 85 Vac 70.0 115 Vac 65.0 230 Vac 264 Vac 60.0 55.0 20 30 40 50 60 Current Load (%) 70 80 90 10 100 20 95.0 95.0 90.0 90.0 85.0 85.0 80.0 75.0 85 Vac 70.0 115 Vac 65.0 230 Vac 264 Vac 60.0 20 30 40 50 60 Current Load (%) 70 30 40 50 60 Current Load (%) 70 80 90 100 48 Vdc Output Efficiency Curve (at 25C) Efficiency (%) Efficiency (%) 50 Current Load (%) 75.0 24 Vdc Output Efficiency Curve (at 25C) 55.0 10 40 15 Vdc Output Efficiency Curve (at 25C) Efficiency (%) Efficiency (%) 12 Vdc Output Efficiency Curve (at 25C) 30 80 90 80.0 75.0 85 Vac 70.0 115 Vac 65.0 230 Vac 60.0 100 cui.com 55.0 10 264 Vac 20 30 40 50 60 Current Load (%) 70 80 90 100 Additional Resources: Product Page | 3D Model | PCB Footprint CUI Inc SERIES: VOF-20B DESCRIPTION: AC-DC POWER SUPPLY date 01/08/2019 page 5 of 5 REVISION HISTORY rev. description date 1.0 initial release 02/23/2017 1.01 increased operating altitude 02/05/2018 1.02 updated datasheet 01/08/2019 The revision history provided is for informational purposes only and is believed to be accurate. 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