Additional Resources: Product Page 3D Model PCB Footprint date 03/26/2021 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 output output output ripple efficiency MODEL 1 voltage current power and noise max max typ typ (Vdc) (A) (W) (mVp-p) (%) VOF-20B-S5 5 3.5 17.5 100 82.85 VOF-20B-S9 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.comAdditional Resources: Product Page 3D Model PCB Footprint CUI Inc SERIES: VOF-20B DESCRIPTION: AC-DC POWER SUPPLY date 03/26/2021 page 2 of 5 INPUT parameter conditions/description min typ max units 85 264 Vac voltage 120 370 Vdc frequency 47 63 Hz current 0.5 A inrush current at 240 Vac, 25C, cold start 70 A leakage current 0.25 mA no load power consumption 0.10 W OUTPUT parameter conditions/description min typ max units 5 Vdc output model 3,500 F 9 Vdc output model 2,100 F 12 Vdc output model 1,600 F capacitive load 15 Vdc output model 1,300 F 24 Vdc output model 850 F 48 Vdc output model 420 F initial set point accuracy at full load, 25C 2 % line regulation high line to low line at full load 0.5 % load regulation 10%~100% load 1 % hold-up time at 115 Vac 12 ms switching frequency 65 kHz temperature coefficient 0.05 %/C PROTECTIONS parameter conditions/description min typ max units over voltage protection hiccup, auto recovery over current protection 110 % short circuit protection hiccup, auto recovery SAFETY & COMPLIANCE parameter conditions/description min typ max units isolation voltage input to output 4,000 Vac safety approvals IEC62368-1/60950-1, UL62368-1/60950-1 safety class class II EN 55032 Class B, FCC Part 15 Class B, EN 61000- EMI/EMC 6-3, 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 300,000 hours life time at 40C, 75% load 3 years RoHS yes ENVIRONMENTAL parameter conditions/description min typ max units operating temperature see derating curve -25 70 C storage temperature -40 85 C operating humidity non-condensing 93 % operating altitude 5000 m cui.com