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date 12/04/2017
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SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER
date
page 1 of 7
FEATURES
• 1 W isolated output
• smaller package
• single/dual unregulated output
• 3,000 Vdc isolation
• short circuit protection
• extended temperature range (-40~105°C)
• antistatic protection up to 8kV
• UL 60950-1 approval
• high efficiency at light load
• efficiency up to 81%
MODEL input
voltage
output
voltage
output
current
output
power
ripple
and noise2
eciency
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
typ
(mVp-p)
typ
(%)
PEM1-S3-S3-S 3.3 2.97~3.63 3.3 30 303 1 60 73
PEM1-S3-S5-S 3.3 2.97~3.63 5 20 200 1 60 78
PEM1-S5-S3-S 5 4.5~5.5 3.3 30 303 1 60 73
PEM1-S5-S5-S15 4.5~5.5 5 20 200 1 60 80
PEM1-S5-S12-S15 4.5~5.5 12 9 83 1 60 80
PEM1-S5-S15-S15 4.5~5.5 15 7 67 1 60 81
PEM1-S5-S24-S15 4.5~5.5 24 5 42 1 60 81
PEM1-S5-D3-S 5 4.5~5.5 ±3.3 ±15 ±152 1 60 73
PEM1-S5-D5-S15 4.5~5.5 ±5 ±10 ±100 1 60 80
PEM1-S5-D12-S15 4.5~5.5 ±12 ±5 ±42 1 60 80
PEM1-S5-D15-S15 4.5~5.5 ±15 ±4 ±33 1 60 81
PEM1-S5-D24-S15 4.5~5.5 ±24 ±2 ±21 1 60 81
PEM1-S12-S3-S 12 10.8~13.2 3.3 30 303 1 60 75
PEM1-S12-S5-S112 10.8~13.2 5 20 200 1 60 80
PEM1-S12-S12-S112 10.8~13.2 12 9 83 1 60 80
PEM1-S12-S15-S112 10.8~13.2 15 7 67 1 60 81
PEM1-S12-D3-S 12 10.8~13.2 ±3.3 ±15 ±152 1 60 74
PEM1-S12-D5-S112 10.8~13.2 ±5 ±10 ±100 1 60 80
PEM1-S12-D12-S112 10.8~13.2 ±12 ±5 ±42 1 60 81
PEM1-S12-D15-S112 10.8~13.2 ±15 ±4 ±33 1 60 81
PEM1-S15-S5-S 15 13.5~16.5 5 20 200 1 60 80
PEM1-S15-S12-S 15 13.5~16.5 12 9 83 1 60 80
PEM1-S15-S15-S 15 13.5~16.5 15 7 67 1 60 81
PEM1-S15-D5-S 15 13.5~16.5 ±5 ±10 ±100 1 60 80
PEM1-S15-D15-S 15 13.5~16.5 ±15 ±4 ±33 1 60 81
PEM1-S24-S3-S 24 21.6~26.4 3.3 30 303 1 60 75
PEM1-S24-S5-S124 21.6~26.4 5 20 200 1 60 79
Notes: 1. UL approved
2. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 μF ceramic and 10 μF electrolytic capacitors on the output.
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CUI Inc │ SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER date 12/04/2017 │ page 2 of 7
INPUT
parameter conditions/description min typ max units
operating input voltage
3.3 Vdc input models
5 Vdc input models
12 Vdc input models
15 Vdc input models
24 Vdc input models
2.97
4.5
10.8
13.5
21.6
3.3
5
12
15
24
3.63
5.5
13.2
16.5
26.4
Vdc
Vdc
Vdc
Vdc
Vdc
surge voltage
for maximum of 1 second
3.3 Vdc input models
5 Vdc input models
12 Vdc input models
15 Vdc input models
24 Vdc input models
-0.7
-0.7
-0.7
-0.7
-0.7
5
9
18
21
30
Vdc
Vdc
Vdc
Vdc
Vdc
lter capacitance lter
OUTPUT
parameter conditions/description min typ max units
line regulation
for Vin change of 1%
3.3 Vdc output models
all other models
±1.5
±1.2
%
%
load regulation
measure from 10% load to full load
3.3 Vdc input models
5 Vdc input models
12 Vdc input models
15 Vdc input models
24 Vdc input models
18
12
8
7
6
%
%
%
%
%
voltage accuracy see tolerance envelope curve
voltage balance dual output, balanced loads ±0.5 ±1 %
switching frequency at full load, nominal input voltage 100 kHz
temperature coecient at full load ±0.03 %/°C
PART NUMBER KEY
PEM1 - SXX - XXX -S
Input Voltage Output Voltage Packaging Style
Base Number Output
S = single
D = dual SIP
MODEL
(CONTINUED)
input
voltage
output
voltage
output
current
output
power
ripple
and noise2
eciency
typ
(Vdc)
range
(Vdc) (Vdc)
min
(mA)
max
(mA)
max
(W)
typ
(mVp-p)
typ
(%)
PEM1-S24-S12-S124 21.6~26.4 12 9 83 1 60 81
PEM1-S24-S15-S124 21.6~26.4 15 7 67 1 60 81
PEM1-S24-S24-S124 21.6~26.4 24 5 42 1 60 81
PEM1-S24-D3-S 24 21.6~26.4 ±3.3 ±15 ±152 1 60 73
PEM1-S24-D5-S124 21.6~26.4 ±5 ±10 ±100 1 60 80
PEM1-S24-D12-S124 21.6~26.4 ±12 ±5 ±42 1 60 81
PEM1-S24-D15-S124 21.6~26.4 ±15 ±4 ±33 1 60 79
PEM1-S24-D24-S124 21.6~26.4 ±24 ±2 ±21 1 60 80
Notes: 1. UL approved
2. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 μF ceramic and 10 μF electrolytic capacitors on the output.
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CUI Inc │ SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER date 12/04/2017 │ page 3 of 7
10 Sec. Max.
Wave Soldering Time
4 Sec. Max.
Peak Temp. 260°C Max.
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection11 s
Note: 1. The supply voltage must be discontinued at the end of the short circuit duration.
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage input to output for 1 minute, 1 mA max. leakage
current 3,000 Vdc
isolation resistance input to output at 500 Vdc 1,000 MΩ
isolation capacitance input to output, 100KHz, 0.1V 20 pF
safety approvals2UL 60950-1
conducted emissions CISPR22/EN55022, class B (external circuit required, see Figure 1)
radiated emissions CISPR22/EN55022, class B (external circuit required, see Figure 1)
ESD IEC/EN61000-4-2, class B, contact ± 8kV for single outputs
IEC/EN61000-4-2, class B, contact ± 6kV for dual outputs
MTBF as per MIL-HDBK-217F @ 25°C 3,500,000 hours
RoHS 2011/65/EU
Note: 2. See specic models noted on pages 1 & 2.
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curve -40 105 °C
storage temperature -55 125 °C
storage humidity non-condensing 95 %
temperature rise at Ta = 25°C 25 °C
SOLDERABILITY
parameter conditions/description min typ max units
hand soldering 1.5 mm from case for 10 seconds 300 °C
wave soldering3see wave soldering prole 260 °C
Notes: 3. Preheat conditions: At 120°C for over 1 minute.
>60 seconds
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
120
Preheat Prole Wave Soldering Prole
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CUI Inc │ SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER date 12/04/2017 │ page 4 of 7
PIN CONNECTIONS
PIN Single Output Dual Output
1 Vin Vin
2 GND GND
5 0V -Vo
6 No Pin 0V
7+Vo +Vo
units: mm[inch]
tolerance: ±0.25[±0.010]
pin section tolerance: ±0.10[±0.004]
MECHANICAL
parameter conditions/description min typ max units
dimensions 19.50 x 6.00 x 9.30 (0.768 x 0.236 x 0.366 inch) mm
case material epoxy resin (UL94-V0)
weight 2.4 g
MECHANICAL DRAWING
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CUI Inc │ SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER date 12/04/2017 │ page 5 of 7
EMC RECOMMENDED CIRCUIT
Recommended external circuit components
Vin
(Vdc) C1 LDM
3.3 4.7μF/50V 6.8μH
54.7μF/50V 6.8μH
12 4.7μF/50V 6.8μH
15 4.7μF/50V 6.8μH
24 4.7μF/50V 6.8μH
Vin
GND
+Vo
-Vo
(0V)
DC/DC
LO
AD
LDM
C1
Vin
GN
D
Cout
TEST CONFIGURATION
DC
Cin
Lin
DC
Load
Oscilloscope
Current
Probe
DERATING CURVES
Note: Input reected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
External components
Lin 4.7μH
Cin 220μF, ESR < 1.0Ω
at 100 kHz
10 20 30 40 50 60 70 80 90 100
10
0
5
Typical Load Line
Rated Output Voltage
-2.5
2.5
-7.5
Output Current Percentage (%)
(Nominal Input Voltage)
Tolerance Envelope Curve (all other models)
Output Voltage Accuracy (%)
10 20 30 40 50 60 70 80 90 100
10
0
5
-5
Rated Output Voltage
1.0
-7.5
-15
Output Current Percentage (%)
(Nominal Input Voltage)
Tolerance Envelope Curve (3.3 Vdc)
Output Voltage Accuracy (%)
Typical Load Line
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 020406085 105 120
Temperature Derating Curve
Safe operating area
Figure 1
Figure 2
Table 1
Table 2
Note: 1. See Table 3 for Cout values.
Rated Output Voltage
Output Current Percentage (%)
(Nominal Input Voltage)
Tolerance Envelope Curve
(all other models)
Output Voltage Accuracy (%)
10 20 40 60 80 100
10
0
5
-5
Rated Output Voltage
1.0
-7.5
-15
Output Current Percentage (%)
(Nominal Input Voltage)
Tolerance Envelope Curve
(3.3 Vdc output only)
Output Voltage Accuracy (%)
Typical Load Line
-10
-15
10 20 40 60 80 100
15
5
10
-0
2.5
-2.5
Typical Load Line
-5
-10 -7.5
Max
Max
Min
Min
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CUI Inc │ SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER date 12/04/2017 │ page 6 of 7
1. Output load requirement
To ensure this module can operate eciently and reliably, the minimum output load may not be less than 10% of the full load during
operation. If the actual output power is low, connect a resistor at the output end in parallel to increase the load.
2. Overload Protection
Under normal operating conditions, the output circuit of this product has no protection against overload. The simplest method to add
this is to add a circuit breaker to the circuit.
3. Recommended circuit
If you want to further decrease the input/output ripple, you can increase the capacitance accordingly or choose capacitors with low
ESR (see Figure 3 & Table 3). However, the capacitance of the output lter capacitor must be appropriate. If the capacitance is too
high, a startup problem might arise. For every channel of the output, to ensure safe and reliable operation, the maximum capacitance
must be less than the maximum capacitive load (see Table 4).
Vin
(Vdc)
Cin
(µF)
Single Vo
(Vdc)
Cout
(µF)
Dual Vo
(Vdc)
Cout
(µF)
3.3 4.7 3.3 10 ±3.3 4.7
5 4.7 5 10 ±5 4.7
12 2.2 12 2.2 ±12 1
15 2.2 15 1 ±15 0.47
24 1 24 1 ±24 0.47
APPLICATION NOTES
Note: 1. Operation under minimum load will not damage the converter; however, they may not meet all specications listed.
2. Max. capacitive load tested at input voltage range and full load.
3. It is recommended to use either ceramic capacitors or electrolytic capacitors on the input and the output. Using tantalum capacitors may increase the risk of failure.
4. All specications measured at: Ta=25°C, humidity<75%, nominal input voltage and rated output load, unless otherwise specied.
Single Vout
(Vdc)
Max. Capacitive Load
(μF)
Dual Vout
(Vdc)
Max. Capacitive Load1
(μF)
3.3 220 3.3 100
5 220 5 100
12 220 12 100
15 220 15 100
24 220 24 100
Figure 3
Vin
GND
+Vo
0V
DC
Cin
DC
Cout
Cout
-Vo
Dual OutputSingle Output
Vin
GND
+Vo
0V
DC
Cin
DC
Cout
Table 3
Note: It’s not recommended to connect any external capacitors in
applications with less than 0.5 watt output.
Table 4
Note: 1. For each output.
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CUI Inc │ SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER date 12/04/2017 │ page 7 of 7
CUI oers 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 aect its safety or eectiveness.
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20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 03/19/2013
1.01 added model PEM1-S15-S12-S 07/29/2013
1.02 added new models 02/14/2014
1.03 added UL approval to some models 09/16/2014
1.04 added UL approval to some models 01/14/2015
1.05 updated tolerance envelope curves 02/10/2016
1.06 added wave soldering preheat conditions, updated emc
recommendations 12/04/2017
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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