cui.com

CUI Inc

│ SERIES: VOF-25 │ DESCRIPTION: AC-DC POWER SUPPLY

date

08/17/2012

│ page 2 of 5

INPUT

parameter

conditions/description

min

typ

max

units

voltage

85

120

264

375

Vac

Vdc

frequency

47

63

Hz

current

at 110 Vac

at 220 Vac

0.7

0.35

A

A

inrush current

at 110 Vac, full load, cold start

at 220 Vac, full load, cold start

20

40

A

A

input fuse

built-in, non-user serviceable

OUTPUT

parameter

conditions/description

min

typ

max

units

line regulation

high line to low line at full load

±0.5

%

load regulation

full load to 10% load

±1

%

temperature coefficient

±0.05

%/°C

hold-up time

115 Vac at full load

16

ms

adjustability

adjustable with built-in trim pot

-5

+5

%

switching frequency

45

50

55

kHz

PROTECTIONS

parameter

conditions/description

min

typ

max

units

over voltage protection

clamped by TVS

115

%

over current protection

automatically recovers

105

%Io

short circuit protection

protected, long term short circuit may reduce

reliability

SAFETY & COMPLIANCE

parameter

conditions/description

min

nom

max

units

isolation voltage

primary to secondary for 1 minute

primary to transformer core for 1 minute

primary to ground for 1 minute

3,000

1,500

1,500

Vac

Vac

Vac

isolation resistance

input to output at 500 Vdc at 25°C

50

MΩ

safety approvals

TUV EN 60950, CE, UL/cUL 60950-1

EMI/EMC

FCC class B, EN 55022 class B

leakage current

1.5

mA

RoHS compliant

yes

MTBF

according to MIL-HDBK-217F

250,000

hours

ENVIRONMENTAL

parameter

conditions/description

min

nom

max

units

operating temperature

see derating curve

0

60

°C

storage temperature

-20

85

°C

operating humidity

non-condensing

20

90

%

storage humidity

non-condensing

20

95

%

operating altitude

10,000

3,000

ft

m

storage altitude

30,000

9,000

ft

m