cui.com
date 07/22/2014
page
1 of 5
SERIES: VOF-50 │ DESCRIPTION: AC-DC POWER SUPPLY
PART NUMBER KEY
VOF-50 - XX
Base Number
Output Voltage
FEATURES
• up to 50 W continuous power
• compact size
• universal input (90~277 Vac)
• single output from 5~24 Vdc
• user trimmable output voltage option
• no load power consumption <0.19W
• 3000 Vac isolation
• over current, over voltage, and short circuit protections
• UL/cUL and TUV 60950-1 safety approvals
• efficiency up to 89%
MODEL
output
voltage
output
current
output
power
ripple
and noise
1
efciency
(Vdc)
max
(A)
max
(W)
max
(mVp-p)
typ
(%)
VOF-50-5 5 6.67 33.35 120 82
VOF-50-12 12 4.2 50 120 87
VOF-50-15 15 3.4 50 150 88
VOF-50-24 24 2.1 50 240 89
Notes: 1.Ripple&noisearemeasuredat20MHzBWwith0.1μFceramiccapanda10μFelectrolyticcapacitorsontheoutputandthetwoearthgroundpadsareconnectedto
input earth ground.
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CUI Inc │ SERIES: VOF-50 │ DESCRIPTION: AC-DC POWER SUPPLY date 07/22/2014 │ page 2 of 5
INPUT
parameter conditions/description min typ max units
voltage 90 277 Vac
frequency 47 63 Hz
input current
at 115 Vac, full load
at 230 Vac, full load
1.1
0.5
A
A
inrush current at 230 Vac, cold start 50 A
leakage current at 277 Vac 3.5 mA
no load power consumption
at 110 Vac
at 230 Vac
0.19
0.30
W
W
input fuse 2 A/250V time delay fuse (included)
OUTPUT
parameter conditions/description min typ max units
line regulation low line to high line ±0.5 %
load regulation full load to 10% load ±1 %
initial set point accuracy ±3 %
transient response
1 kHz, 10~100% load
VOF-50-5
VOF-50-12
VOF-50-15
VOF-50-24
500
1200
1500
2400
mVp-p
mVp-p
mVp-p
mVp-p
hold-up time at 115 Vac, full load 8 ms
start-up time at 115 Vac, full load 50 ms
start-up delay at 115 Vac, full load 1000 ms
adjustability built in trim pot ±5 %
switching frequency 61 65 69 kHz
temperaturecoefcient ±0.03 %/°C
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection hiccup, auto recovery 110 %
over current protection hiccup, auto recovery 110 %
over voltage protection clamped by TVS
SAFETY & COMPLIANCE
parameter conditions/description min typ max units
isolation voltage
input to output
input to ground
output to ground
3,000
1,500
1,500
Vac
Vac
Vac
safety approvals UL60950-1, EN60950-1
EMI/EMC
1
EN 55022: 2010 Class B, EN 61204-3:2000, EN
61000-6-3: 2007 +A1: 2011, EN 61000-3-2:
2006 +A2: 2009, EN 61000-3-3: 2008, EN 55024:
2010, EN 61000-6-1: 2007, ENV 50204: 1995, CE,
FCC
class class II
MTBF as per MIL-HDBK-217F at 25 °C, full load 250,000 hours
RoHS 2011/65/EU
Notes: 1.Thepowersupplyisconsideredacomponentwhichwillbeinstalledintonalequipment.ThenalequipmentstillmustbetestedtomeetthenecessaryEMCdirectives.
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