date
page
08/15/2012
1 of 4
SERIES:
VSK-S3
│
DESCRIPTION:
AC-DC POWER SUPPLY
FEATURES
• up to 3 W continuous power
• compact board mount design
• universal input (85~264 Vac / 110~370 Vdc)
• single output from 3.3~24 V
• over voltage, over temperature, and short circuit protections
• UL/cUL safety approvals
• efficiency up to 78%
RoHS
MODEL
VSK-S3-3R3U
VSK-S3-5U
VSK-S3-9U
VSK-S3-12U
VSK-S3-15U
VSK-S3-24U
Notes:
output
voltage
(Vdc)
output
current
max
(A)
output
power
max
(W)
ripple
and noise
1
typ
(mVp-p)
efficiency
typ
(%)
3.3
5
9
12
15
24
0.7
0.6
0.33
0.25
0.2
0.125
2.3
3
3
3
3
3
30
30
30
30
30
30
63
72
74
76
76
78
1. Ripple and noise measured at 20 MHz bandwidth
PART NUMBER KEY
VSK-S3 -
XXU
Base Number
Output Voltage
cui.com
CUI Inc
│
SERIES:
VSK-S3
│
DESCRIPTION:
AC-DC POWER SUPPLY
date
08/15/2012
│
page
2 of 4
INPUT
parameter
voltage
frequency
current
inrush current
external input fuse
(recommended)
at 110 Vac
at 230 Vac
at 110 Vac
at 230 Vac
slow blow, 250 V
conditions/description
min
85
110
47
65
30
10
20
0.5
typ
max
264
370
440
units
Vac
Vdc
Hz
mA
mA
A
A
A
OUTPUT
parameter
line regulation
load regulation
temperature coefficient
hold-up time
voltage accuracy
switching frequency
at 230 Vac
3.3 V model
all other models
10 ~ 100%
conditions/description
min
typ
±0.5
±1
0.02
50
±3
±2
100
max
units
%
%
%/°C
ms
%
%
kHz
PROTECTIONS
parameter
over voltage protection
short circuit protection
over temperature protection
conditions/description
chip lock up
auto recovery with no damage from a short on any output
150
°C
min
typ
max
units
SAFETY & COMPLIANCE
parameter
isolation voltage
safety approvals
safety class
EMI/EMC
RoHS compliant
MTBF
conditions/description
primary to secondary (for 1 minute)
IEC 60950-1, EN 60950-1, UL 60950-1
class II
EN 55022 (level A), IEC/EN 61000-4-2 (level 4, 8kV/15kV), IEC/EN 61000-4-3, IEC/EN 61000-4-4
(level 3, 2kV), IEC/EN 61000-4-5 (level 3, 1kV/2kV)
yes
25°C
300,000
hrs
min
3,000
typ
max
units
Vac
ENVIRONMENTAL
parameter
operating temperature
storage temperature
case temperature
operating humidity
non-condensing
conditions/description
min
-25
-40
typ
max
70
105
95
95
units
°C
°C
°C
%
cui.com
CUI Inc
│
SERIES:
VSK-S3
│
DESCRIPTION:
AC-DC POWER SUPPLY
date
08/15/2012
│
page
4 of 4
TYPICAL APPLICATION CIRCUIT
L
* FUS E * NT C
C3
+
L
22
26
N
- V0
+V0
C1
+
C2
Tvs
RL
* F USE * NT C
L
NF
C6
C8
C7
L
MO V
+V0
C1 C2 Tvs
+
RL
M OV
C3
+
22
26
N
-V0
N
N
Figure1
Figure 2
VSK-S3 EMC
Filtering Circuit
EXTERNAL CAPACITORS TYPICAL VALUE (Unit:
μF)
MODEL
VSK-S3-3R3U
VSK-S3-5U
VSK-S3-9U
VSK-S3-12U
VSK-S3-15U
VSK-S3-24U
Notes:
C1
150
150
150
150
150
150
C2
0.1
0.1
0.1
0.1
0.1
0.1
C3
4.7/400V
4.7/400V
4.7/400V
4.7/400V
4.7/400V
4.7/400V
TVS
P4KE6.8A
P4KE6.8A
P4KE12A
P4KE20A
P4KE20A
P4KE30A
1. Output
fi
ltering capacitors C1, C3 is electrolytic capacitors, It is recommended to use high frequency
and low impedance electrolytic capacitors. For capacitance and current of capacitor please refer to
manufacture’s datasheet. Voltage derating of apacitor should be 80% or above. C2, C4 is ceramic
capacitors , it is used to
fi
lter high frequency noise. TVS is a recommended component to protect
post-circuits (when converter fails).
2. MOV is required for VSK-S3 models. Model: 471KD05, it is used to protect the device under surge.
3. It is recommended to connect FUSE, the parameter is 0.5A/250V slow blow. External input NTC is
recommended to use D -14 or 10Ω/2W wire-round resistor.
4. If EMC performance is required, recommended to add “EMC
fi
lter” at the input end(see
fi
gure 2)
C6:X capacitor, recommended parameter 0.1uF/275V; C7,C8:Y capacitor, recommended parameter
220pF/275V; NF: common model choke, recommended inductance is about 10mH-30mH.
5. Terminals 22 and 26 are internal rectification and
fi
ltering terminals. To protect the models further, it
is recommended to connect an electrolytic capacitor C3 (it is recommended to be 4.7uF/400V). If
operation voltage of the module is between 160~264VAC, C3 can be removed.
REVISION HISTORY
rev.
1.0
1.01
1.02
description
initial release
new template applied
V-Infinity branding removed
date
02/27/2009
04/10/2012
08/15/2012
The revision history provided is for informational purposes only and is believed to be accurate.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
Fax 503.612.2383
cui.com
techsupport@cui.com
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical
component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to
affect its safety or effectiveness.
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