Additional Resources: Product Page 3D Model date 09/27/2016 page 1 of 6 SERIES: VOF-280 DESCRIPTION: AC-DC POWER SUPPLY FEATURES up to 280 W continuous power universal input voltage range industry standard 3 x 5 footprint power factor correction low no load power consumption over voltage, over current, and short circuit protections output trim UL/cUL and TUV safety approvals efficiency up to 91% 3 output output output ripple efficiency MODEL 1 2 voltage current power and noise max max max typ (Vdc) (A) (W) (mVp-p) (%) VOF-280-12 12 23.33 280 120 88 VOF-280-15 15 18.67 280 150 90 VOF-280-24 24 11.67 280 240 90 VOF-280-36 36 7.78 280 360 90 VOF-280-48 48 5.84 280 480 91 Notes: 1. Maximum output power of 280 W with forced air cooling (34.2 CFM), 168 W with convection cooling. 2. At full load, nominal input, 20 MHz bandwidth oscilloscope, using a 12 twisted pair wire terminated together with a 0.1 F and 47 F capacitor. 3. At full load, 230 Vac input, without external fan. 4. All specifications are measured at Ta=25C, 230 Vac input voltage, and rated output load unless otherwise specified. PART NUMBER KEY VOF-280 - XX Output Voltage Base Number cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VOF-280 DESCRIPTION: AC-DC POWER SUPPLY date 09/27/2016 page 2 of 6 INPUT parameter conditions/description min typ max units voltage 90 277 Vac frequency 47 63 Hz at 115 Vac, full load 3.5 A current at 230 Vac, full load 1.7 A inrush current at 230 Vac, cold start 80 A leakage current at 264 Vac 3.5 mA at 115 Vac, full load 0.98 power factor correction at 230 Vac, full load 0.95 no load power consumption at 230 Vac 0.5 W input fuse 6.3 A / 250 V time delay fuse (included) OUTPUT parameter conditions/description min typ max units initial set point accuracy 3 % line regulation 0.5 % load regulation from 100%~10% load 1 % 1 kHz, 90%~10% load VOF-280-12 1,200 mVp-p VOF-280-15 1,500 mVp-p transient response VOF-280-24 2,400 mVp-p VOF-280-36 3,600 mVp-p VOF-280-48 4,800 mVp-p at 115 Vac 3 s start-up delay time at 230 Vac 2.5 s start-up rise time at 115/230 Vac 60 ms hold-up time at 115/230 Vac 10 ms adjustability built in trim pot 5 % swithching frequency 75 400 kHz temperature coefficient at 0~50C 0.03 %/C fan output 12 Vdc / 300 mA PROTECTIONS parameter conditions/description min typ max units latch mode VOF-280-12 13.8 15.8 Vdc VOF-280-15 16.5 19.5 Vdc over voltage protection VOF-280-24 26.5 31.5 Vdc VOF-280-36 38.5 43.5 Vdc VOF-280-48 55 62 Vdc over current protection hiccup, auto recovery 110 % short circuit protection latch SAFETY & COMPLIANCE parameter conditions/description min typ max units input to output 3,000 Vac isolation voltage input to ground 1,500 Vac output to ground 500 Vac safety approvals UL 60950-1, EN 60950-1, IEC 60950-1 cui.com