PEM1-S_V01 CUI
Document overview
- PDF pages: 7
Technical content
Page 1
date date 07/07/2021 page 1 of 7 1 of 7 page
SERIES: PEM1-S │ DESCRIPTION: DC-DC CONVERTER

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
- high efficiency at light load
- efficiency up to 81%
- EN 62368-1
MODEL
input
output
output
output
ripple
efficiency
voltage
voltage
current
power
and noise2
typ range
min max
max
typ
typ
(Vdc)
(Vdc)
(Vdc)
(mA) (mA)
(W)
(mVp-p)
(%)
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-S1
5 4.5~5.5
5
20 200
1
60
80
PEM1-S5-S12-S1
5 4.5~5.5
12
9 83
1
60
80
PEM1-S5-S15-S1
5 4.5~5.5
15
7 67
1
60
81
PEM1-S5-S24-S1
5 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-S1
5 4.5~5.5
±5
±10 ±100
1
60
80
PEM1-S5-D12-S1
5 4.5~5.5
±12
±5 ±42
1
60
80
PEM1-S5-D15-S1
5 4.5~5.5
±15
±4 ±33
1
60
81
PEM1-S5-D24-S1
5 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-S1
12 10.8~13.2
5
20 200
1
60
80
PEM1-S12-S12-S1
12 10.8~13.2
12
9 83
1
60
80
PEM1-S12-S15-S1
12 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-S1
12 10.8~13.2
±5
±10 ±100
1
60
80
PEM1-S12-D12-S1
12 10.8~13.2
±12
±5 ±42
1
60
81
PEM1-S12-D15-S1
12 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
21.6~26.4
3.3
PEM1-S24-S5-S1
21.6~26.4
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.
Page 2
date 07/07/2021 │ page 2 of 7
MODEL
input
output
output
output
ripple
efficiency
voltage
voltage
current
power
and noise2
(CONTINUED)
typ range
min max
max
typ
typ
(Vdc)
(Vdc)
(Vdc)
(mA) (mA)
(W)
(mVp-p)
(%)
PEM1-S24-S12-S1
24 21.6~26.4
12
9 83
1
60
81
PEM1-S24-S15-S1
24 21.6~26.4
15
7 67
1
60
81
PEM1-S24-S24-S1
24 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-S1
24 21.6~26.4
±5
±10 ±100
1
60
80
PEM1-S24-D12-S1
24 21.6~26.4
±12
±5 ±42
1
60
81
PEM1-S24-D15-S1
24 21.6~26.4
±15
±4 ±33
1
60
79
PEM1-S24-D24-S1
24 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.
PART NUMBER KEY
PEM1 - SXX - XXX -S
Base Number
Input Voltage
INPUT
parameter
conditions/description 3.3 Vdc input models 5 Vdc input models
operating input voltage
12 Vdc input models 15 Vdc input models 24 Vdc input models for maximum of 1 second 3.3 Vdc input models 5 Vdc input models
surge voltage
12 Vdc input models 15 Vdc input models 24 Vdc input models
filter
capacitance filter
OUTPUT
parameter
conditions/description for Vin change of 1%
line regulation
3.3 Vdc output models all other models measure from 10% load to full load 3.3 Vdc input models 5 Vdc input models
load regulation
12 Vdc input models 15 Vdc input models 24 Vdc input models
voltage accuracy
see tolerance envelope curve
voltage balance
dual output, balanced loads
switching frequency
at full load, nominal input voltage
temperature coefficient
at full load
Output
Packaging Style
Output Voltage S = single
SIP
D = dual
min
typ
max
units
2.97
3.3
3.63
Vdc
4.5
5 5.5
Vdc
10.8
12 13.2
Vdc
13.5
15 16.5
Vdc
21.6
24 26.4
Vdc
-0.7
5 Vdc
-0.7
9 Vdc
-0.7
18
Vdc
-0.7
21
Vdc
-0.7
30
Vdc
min
typ
max
units
±1.5
%
±1.2
%
18
%
12
%
8
%
7
%
6
%
±0.5
±1
% kHz
±0.03
%/°C
Page 3
date 07/07/2021 │ page 3 of 7
PROTECTIONS
parameter
conditions/description
min
typ
max
units
short circuit protection1
1
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
input to output for 1 minute, 1 mA max. leakage
isolation voltage
3,000
Vdc
current
isolation resistance
input to output at 500 Vdc
1,000
MΩ
isolation capacitance
input to output, 100KHz, 0.1V
20
pF
certified to 62368-1: EN
safety approvals2
certified to 60950-1: UL CISPR22/EN55022, class B (external circuit required, see Figure 1)
conducted emissions
CISPR22/EN55022, class B (external circuit required, see Figure 1)
radiated emissions
IEC/EN61000-4-2, class B, contact ± 8kV for single outputs
ESD
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 specific 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 soldering3
see wave soldering profile
260
°C
Notes: 3. Preheat conditions: At 120°C for over 1 minute.


Preheat Profile
Wave Soldering Profile
Page 4
date 07/07/2021 │ page 4 of 7
MECHANICAL
parameter
conditions/description
min
typ
max
units
19.50 x 6.00 x 9.30 (0.768 x 0.236 x 0.366 inch)
dimensions
mm
case material
epoxy resin (UL94-V0)
weight
2.4
g
MECHANICAL DRAWING
units: mm[inch] tolerance: ±0.25[±0.010] pin section tolerance: ±0.10[±0.004]

| PIN CONNECTIONS | ||
| PIN | Single Output | Dual Output |
| 1 | Vin | Vin |
| 2 | GND | GND |
| 5 | 0V | -Vo |
| 6 | No Pin | 0V |
| 7 | +Vo | +Vo |

Page 5
date 07/07/2021 │ page 5 of 7
DERATING CURVES

EMC RECOMMENDED CIRCUIT
Figure 1
Table 1

| Recommended external circuit components | ||
| Vin (Vdc) | C1 | LDM |
| 3.3 | 4.7μF/50V | 6.8μH |
| 5 | 4.7μF/50V | 6.8μH |
| 12 | 4.7μF/50V | 6.8μH |
| 15 | 4.7μF/50V | 6.8μH |
| 24 | 4.7μF/50V | 6.8μH |
Note: 1. See Table 3 for Cout values.
TEST CONFIGURATION
Figure 2
Table 2

| External components | |
| Lin | 4.7μH |
| Cin | 220μF, ESR < 1.0Ω at 100 kHz |
Note: Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
Page 6
date 07/07/2021 │ page 6 of 7
APPLICATION NOTES
- Output load requirement To ensure this module can operate efficiently 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.
- 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.
- 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 filter 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).
Figure 3
Single output
Dual output


Table 3
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 |
| 1 2 | 2.2 | 12 | 2.2 | ±12 | 1 |
| 15 | 2.2 | 15 | 1 | ±15 | 0.47 |
| 24 | 1 | 24 | 1 | ±24 | 0.47 |
| 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 |
Note: 1. For each output.
Note: It’s not recommended to connect any external capacitors in applications with less than 0.5 watt output.
- Operation under minimum load will not damage the converter; however, they may not meet all specifications listed. Note: 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 specifications measured at: Ta=25°C, humidity<75%, nominal input voltage and rated output load, unless otherwise specified.
Page 7
date 07/07/2021 │ page 7 of 7
REVISION HISTORY
| 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 |
| 1.07 | safeties updated in features and safety line | 01/18/2021 |
| 1.08 | derating curves and circuit figures updated | 07/07/2021 |
The revision history provided is for informational purposes only and is believed to be accurate.
Headquarters 20050 SW 112th Ave.
Fax 503.612.2383
Tualatin, OR 97062 800.275.4899
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.