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09/13/2022
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SERIES: PSK-S25B │ DESCRIPTION: AC-DC POWER SUPPLY
FEATURES
•
•
•
•
•
•
•
•
•
universal input range (90 ~ 264 Vac)
option to support large transient loads (2x rated current)4
Class B emissions (EN55032/CISPR/FCC)
certified to IEC/EN/UL 62368-1
designed to meet IEC/EN 60335
short circuit protection
over voltage protection
< 100 mW no-load power consumption
Class II
MODEL
output
voltage
output
current
output
power
ripple
and noise1
efficiency2
(Vdc)
min
(A)
max
(A)
max
(W)
max
(mVp-p)
typ
(%)
PSK-S25B-5*
5
0
4.00
20
50
81
PSK-S25B-12
12
0
2.10
25
120
84
PSK-S25B-15
15
0
1.67
25
150
85
PSK-S25B-24
24
0
1.05
25
240
86
PSK-S25B-36
36
0
0.70
25
360
87
PSK-S25B-48*
48
0
0.52
25
480
87
Notes:
1.
2.
3.
4.
At full load, nominal input, 20 MHz bandwidth oscilloscope, with 1 µF ceramic and 10 µF electrolytic capacitors on the output.
At 230 Vac, full load, 25°C.
All specifications are measured at Ta=25°C, nominal input voltage, and 75% rated output load unless otherwise specified.
Parts with the “-PB” suffix can sustain 2 times the rated output load for 10 seconds (MAX) and 10% duty cycle (MAX). This functionality requires a 33 µF / 400 V
capacitor connected between pins BC+ and BC-. See Power Boost Section below for more details.
5. * Discontinued model.
PART NUMBER KEY
PSK-S25B - XX - XX
Base Number
Output Voltage
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“Blank” = No Power Boost
PB = Power Boost Function
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CUI Inc │ SERIES: PSK-S25B │ DESCRIPTION: AC-DC POWER SUPPLY
date 09/13/2022 │ page 2 of 6
INPUT
parameter
conditions/description
min
voltage
frequency
current
at 100 Vac, full load
inrush current
at 240 Vac, cold start, 25°C
leakage current
at 264 Vac
max
units
90
120
typ
264
370
Vac
Vdc
47
63
Hz
700
mA
60
A
0.25
mA
OUTPUT
parameter
conditions/description
capacitive load
5 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
36 Vdc output models
48 Vdc output models
initial set point accuracy
min
typ
max
units
81,000
40,900
19,800
6,600
4,000
2,170
μF
μF
μF
μF
μF
μF
5 Vdc output model
all other models
±2
±1
%
%
line regulation
measured at high line to low line at full load
±1
%
load regulation
measured at 10%~100% load
±1
%
start-up time
hold-up time
3
at 115 Vac
switching frequency
temperature coefficient
s
8
ms
65
kHz
±0.05
%/°C
PROTECTIONS
parameter
conditions/description
over voltage protection
TVS to clamp output votlage
5 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
36 Vdc output models
48 Vdc output models
short circuit protection
hiccup, auto recovery
min
typ
max
6.8
15.0
18.0
30.0
47.0
56.0
units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
SAFETY & COMPLIANCE
parameter
conditions/description
isolation voltage
input to output for 1 minute
min
isolation resistance
safety approvals
certified to IEC/EN/UL 62368-1
designed to meet IEC/EN 60335
safety class
Class II
conducted emissions
EN55032, EN61000-6-3:2012, Class B,
47 CFR FCC Part 15 Subpart B (Class B)
radiated emissions
EN55032, EN61000-6-3:2012, Class B,
47 CFR FCC Part 15 Subpart B (Class B)
harmonic current emissions
EN61000-3-2:2014
voltage fluctuations & flicker
EN61000-3-3:2013
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typ
max
units
3,000
Vac
100
MΩ
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CUI Inc │ SERIES: PSK-S25B │ DESCRIPTION: AC-DC POWER SUPPLY
date 09/13/2022 │ page 3 of 6
SAFETY & COMPLIANCE (CONTINUED)
parameter
conditions/description
ESD
IEC61000-4-2:2008, air discharge: ± 8 kV, contact discharge: ± 4 kV
radiated immunity
IEC61000-4-3:2010
EFT/burst
IEC61000-4-4:2012, ± 0.5 kV, ± 1 kV, ± 2 kV
surge
IEC61000-4-5:2014, L-N: ± 0.5 kV, ± 1 kV
conducted immunity
IEC61000-4-6:2013
power frequency magnetic field
IEC61000-4-8:2009
voltage dips & interruptions
IEC61000-4-11:2004, Dip: 30%, 10 ms, Dip: 60%, 100 ms, Dip: >95%, 5,000 ms
MTBF
as per MIL-HDBK-217F, at 115 Vac, 25°C, GB
RoHS
yes
Notes:
min
typ
max
500,000
units
hours
4. The power supply is considered a component which will be installed into final equipment. The final equipment still must be tested to meet the necessary EMC directives.
ENVIRONMENTAL
parameter
conditions/description
min
max
units
operating temperature
see derating curves
-30
70
°C
-30
85
°C
93
%
5,000
m
storage temperature
operating humidity
typ
non-condensing
altitude
vibration
as per MIL-STD-810F Table 514.5C-VIII; 15~2000
Hz for 1 hour on each axis for 3 hours
4
G
shock
as per MIL-STD-810F Table 516.5, Table 516.5-1;
for 10 ms on each axis 3 times
75
G
DERATING CURVES
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CUI Inc │ SERIES: PSK-S25B │ DESCRIPTION: AC-DC POWER SUPPLY
date 09/13/2022 │ page 4 of 6
MECHANICAL
parameter
conditions/description
dimensions
2.091 x 1.193 x 0.976 (53.10 x 30.30 x 24.80 mm)
min
typ
max
units
inches
weight
105
g
MECHANICAL DRAWING
units: inch [mm]
tolerance: ±0.020 [±0.50]
PIN CONNECTIONS
PIN
Standard
Function
Standard
Power Boost
Power Boost
1
AC (L)
AC (L)
2
AC (N)
AC (N)
3
+Vo
+Vo
4
-Vo
-Vo
5
No Pin
BC+
6
No Pin
BC-
EMC RECOMMENDATIONS
When used in a Class I system implementation (utilizing an Earth Ground connection as depicted in the schematic below),
the PSK-S25B series requires additional inductance and Y-Caps to meet EN55032 Class B. These additional components
are not required in a Class II implementation where no Earth Ground is present.
CHOKE
Specification
Inductance
Duplex
Winding/Turns
UU9.8 R12K
10mH
2-UEW
Φ 0.27*85Ts
Y-CAP
Manufacturers
SEND POWER
Subclass
Withstand
Voltage
Capacitance
Manufacturers
Y1 CAP
250 V (min.)
1000 pF (typ.)
TDK
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date 09/13/2022 │ page 5 of 6
POWER BOOST
The PSK-S25B Series has an ordering option called Power Boost (“-PB” suffix), which can double the rated output power
provided to the load for a maximum of 10 seconds and repeated duty cycle of 10%. This functionality requires a 33
uF / 400 V capacitor to be connected between the BC+ and BC- pins as depicted in the schematic below. This external
capacitor is not required if the PSK-S25B is operating from 220 Vac mains. When utilizing the Power Boost Feature, care
must be taken not to thermally overstress the unit. The combined load (nominal plus peak) should not exceed 65% of the
full load rating when averaged out over time.
INSTALLATION INSTRUCTIONS
The mounting holes should all be 1.5 mm in diameter. A minimum of 4 mm clearance is required for all four sides of the
unit and a minimum of 5 mm clearance is required above the top surface of the unit.
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CUI Inc │ SERIES: PSK-S25B │ DESCRIPTION: AC-DC POWER SUPPLY
date 09/13/2022 │ page 6 of 6
REVISION HISTORY
rev.
description
date
1.0
initial release
02/13/2020
1.01
updates to mechanical & power boost sections
04/08/2020
1.02
curves and circuit drawings updated
03/26/2021
discontinued models PSK-S25B-5 & PSK-S25B-48
09/13/2022
1.03
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
Fax 503.612.2383
cui.com
techsupport@cui.com
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
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.