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date
page
06/11/2015
1 of 7
SERIES:
VSK-S20
│
DESCRIPTION:
AC-DC POWER SUPPLY
FEATURES
• up to 20W continuous power
• compact board mount design
• universal input (85~264 Vac / 100~370 Vdc)
• single output from 3.3~24 Vdc
• over voltage, over temperature, and short circuit protections
• UL/cUL safety approvals
• efficiency up to 85%
MODEL
VSK-S20-3R3U
VSK-S20-5U
VSK-S20-9U
VSK-S20-12U
VSK-S20-15U
VSK-S20-24U
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
4.1
3.5
2.1
1.6
1.3
0.85
13.5
17.5
20
20
20
20
50
50
50
50
50
50
74
78
80
82
83
85
1. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 uF ceramic and 10 uF electrolytic capacitors on the output.
PART NUMBER KEY
VSK-S20 -
XXU
Base Number
Output Voltage
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│
SERIES:
VSK-S20
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DESCRIPTION:
AC-DC POWER SUPPLY
date
06/11/2015
│
page
2 of 7
INPUT
parameter
voltage
frequency
current
inrush current
leakage current
input fuse
at 115 Vac
at 230 Vac
at 115 Vac
at 230 Vac
at 230 Vac, 50 Hz (RMS)
3.15 A/250 V, slow-blow type (external)
16
30
0.1
conditions/description
min
85
100
47
typ
max
264
370
63
600
340
units
Vac
Vdc
Hz
mA
mA
A
A
mA
OUTPUT
parameter
conditions/description
3.3 Vdc output model
5 Vdc output model
9 Vdc output model
12 Vdc output model
15 Vdc output model
24 Vdc output model
at full load
at 10~100% load
±0.5
±1
±2
±10
at 115 Vac
at 230 Vac
15
80
65
±0.02
min
typ
max
48,000
12,000
7,200
5,400
2,700
1,800
units
μF
μF
μF
μF
μF
μF
%
%
%
%
ms
ms
kHz
%/°C
capacitive load
line regulation
load regulation
voltage set accuracy
adjustability
hold-up time
switching frequency
temperature coefficient
PROTECTIONS
parameter
over current protection
short circuit protection
conditions/description
auto restart
continuous, auto restart
3.3 Vdc output model
5 Vdc output model
9 Vdc output model
12 Vdc output model
15 Vdc output model
24 Vdc output model
7.5
7.5
12
20
20
30
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
min
110
typ
max
units
%
over voltage protection
SAFETY & COMPLIANCE
parameter
isolation voltage
safety approvals
safety class
conducted emissions
radiated emissions
ESD
radiated immunity
EFT/burst
conditions/description
input to output for 1 minute
input to ground for 1 minute
UL60950-1, CE
class I
CISPR22/EN55022, Class B
CISPR22/EN55022, Class B
IEC/EN61000-4-2 Class B, contact ±6 kV/air ±8 kV
IEC/EN61000-4-3 Class A, 10V/m
IEC/EN61000-4-4 Class B, ±2 kV
IEC/EN61000-4-4 Class B, ±4 kV (external circuit required, see figure 2)
min
3,000
2,000
typ
max
units
Vac
Vac
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DESCRIPTION:
AC-DC POWER SUPPLY
date
06/11/2015
│
page
3 of 7
SAFETY & COMPLIANCE (CONTINUED)
parameter
surge
conducted immunity
PFM
voltage dips & interruptions
MTBF
RoHS
conditions/description
min
typ
max
units
IEC/EN61000-4-5 Class B, ±1 kV/±2 kV
IEC/EN61000-4-5 Class B, ±2 kV/±4 kV (external circuit required, see figure 2)
IEC/EN61000-4-6 Class A, 10 Vr.m.s
IEC/EN61000-4-8 Class A, 10 A/m
IEC/EN61000-4-11 Class B, 0%-70%
as per MIL-HDBK-217F at 25°C
2011/65/EU
300,000
hrs
ENVIRONMENTAL
parameter
operating temperature
storage temperature
storage humidity
non-condensing
conditions/description
see derating curves
min
-40
-40
typ
max
70
105
95
units
°C
°C
%
DERATING CURVES
load vs. ambient temperature
(at 100~240 Vac)
100
80
60
40
20
100
75
60
load vs. input voltage (Vac)
(at 25°C)
~
~
100
75
60
load vs. input voltage (Vdc)
(at 25°C)
~
~
Safe operating area
40
20
120
Load (%)
~
~
Load (%)
Safe operating area
Safe operating area
40
20
~
~
~
~
Load (%)
-40
-10 -5
5
25
35
45
55
65 70 75
85
95 100 105
115
125
235 240 245
255
264
Ambient Temperature (°C)
Input Voltage (Vac)
100
~
~
340
370
Input Voltage (Vdc)
SOLDERABILITY
parameter
hand soldering
wave soldering
conditions/description
for 3~5 seconds
for 5~10 seconds (see wave soldering profile)
min
350
255
typ
360
260
max
370
265
units
°C
°C
Peak Temp. 260°C Max.
250
Wave Soldering Time
4 Sec. Max.
200
Temperature (°C)
10 Sec. Max.
150
100
50
0
Time (sec.)
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SERIES:
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DESCRIPTION:
AC-DC POWER SUPPLY
date
06/11/2015
│
page
4 of 7
MECHANICAL
parameter
dimensions
case material
weight
cooling
convection cooling
conditions/description
70.0 x 48.0 x 23.5 (2.756 x 1.889 x 0.925 inch)
UL94V-0
120
g
min
typ
max
units
mm
MECHANICAL DRAWING
units: mm[inches]
tolerance: ±0.50[±0.020]
pin diameter: Ø1.00[0.039]±0.10[±0.004]
PIN CONNECTIONS
PIN
1
2
3
4
5
6
FUNCTION
GND
AC(N)
AC(L)
TRIM
-Vo
+Vo
70.0 2.756
23.5 0.925
6.0 0.236
(TYP)
FRONT VIEW
Ø1.50[Ø0.059]
4.0 0.157
1
4
5
62.0 2.441
3
20.0 0.787
2
6
48.0 1.889
2
23.0 0.905
5
5.75 0.226
6
3
Grid size: 2.54 x 2.54
1
4
TOP VIEW
PCB LAYOUT
BOTTOM VIEW
4.0 0.157
(2 PLCS)
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CUI Inc
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SERIES:
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DESCRIPTION:
AC-DC POWER SUPPLY
date
06/11/2015
│
page
5 of 7
TYPICAL APPLICATION CIRCUIT
Figure 1
AC(L)
FU S E
AC(L)
M OV 1
+Vo
C1
C2
T VS 1
LOAD
AC / DC
AC(N)
-Vo
AC(N)
Table 1
Recommended External Circuit Components
MODEL
VSK-S20-3R3U
VSK-S20-5U
VSK-S20-9U
VSK-S20-12U
VSK-S20-15U
VSK-S20-24U
FUSE
3.15A/250V
3.15A/250V
3.15A/250V
3.15A/250V
3.15A/250V
3.15A/250V
MOV1
S14K350
S14K350
S14K350
S14K350
S14K350
S14K350
C1
1µF
1µF
1µF
1µF
1µF
1µF
C2
330μF
330μF
220μF
220μF
220μF
220μF
TVS
SMBJ7.0A
SMBJ7.0A
SMBJ12A
SMBJ20A
SMBJ20A
SMBJ30A
EMC RECOMMENDED CIRCUIT
Figure 2
FUSE
AC( L)
CY1
MOV1
CX
CY2
LDM
LCM
AC(L)
+Vo
C1
C2
TVS1
RL
+
ACDC
-Vo
AC(N)
AC(N)
Table 2
Recommended External Circuit Components
MOV1
CY1, CY2
CX
LCM
LDM
Note:
Also refer to Table 1
S14K350
1000pF/400Vac
0.1μF/275Vac
10mH
4.7μH/2A
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