PDS1-S12-S12-D (CUI)
DC-DC CONVERTER

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SERIES: PDS1-D DESCRIPTION: DC-DC CONVERTER
FEATURES
• 1 W isolated output
• smaller package
• single unregulated output
• 1,500 Vdc isolation
• continuous short circuit protection
• extended temperature range (-40~105°C)
• antistatic protection up to 8kV
• high efficiency at light load
• efficiency up to 82%
date 03/19/2013
page 1 of 6
MODEL
typ
(Vdc)
input
voltage
range
(Vdc)
output
voltage
(Vdc)
PDS1-S3-S3-D
3.3 2.97~3.63
3.3
PDS1-S3-S5-D
3.3 2.97~3.63
5
PDS1-S5-S3-D
5 4.5~5.5
3.3
PDS1-S5-S5-D
5 4.5~5.5
5
PDS1-S5-S9-D
5 4.5~5.5
9
PDS1-S5-S12-D
5 4.5~5.5
12
PDS1-S5-S15-D
5 4.5~5.5
15
PDS1-S5-S24-D
5 4.5~5.5
24
PDS1-S12-S3-D
12 10.8~13.2
3.3
PDS1-S12-S5-D
12 10.8~13.2
5
PDS1-S12-S9-D
12 10.8~13.2
9
PDS1-S12-S12-D
12 10.8~13.2
12
PDS1-S12-S15-D
12 10.8~13.2
15
PDS1-S15-S5-D
15 13.5~16.5
5
PDS1-S24-S3-D
24 21.6~26.4
3.3
PDS1-S24-S5-D
24 21.6~26.4
5
PDS1-S24-S9-D
24 21.6~26.4
9
PDS1-S24-S12-D
24 21.6~26.4
12
PDS1-S24-S15-D
24 21.6~26.4
15
PDS1-S24-S24-D
24 21.6~26.4
24
Notes: 1. ripple and noise are measured at 20 MHz BW by “parallel cable” method
output
current
min
(mA)
max
(mA)
30 303
20 200
30 303
20 200
12 111
9 83
7 67
4 42
30 303
20 200
12 111
9 83
7 67
20 200
30 303
20 200
12 111
9 83
7 67
4 42
output
power
max
(W)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
ripple
and noise1
typ
(mVp-p)
30
30
30
30
30
30
60
60
30
30
30
30
60
30
30
30
30
30
60
60
efficiency
typ
(%)
80
80
80
80
80
81
81
81
80
80
80
81
80
80
80
80
80
81
82
82
cui.com
Free Datasheet http://www.datasheet4u.com/


PDS1-S12-S12-D (CUI)
DC-DC CONVERTER

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CUI Inc SERIES: PDS1-D DESCRIPTION: DC-DC CONVERTER
date 03/19/2013 page 2 of 6
PART NUMBER KEY
PDS1 - SXX - SXX -D
INPUT
parameter
operating input voltage
surge voltage
filter
Base Number
Input Voltage Output Voltage Packaging Style
DIP
conditions/description
3.3 V input models
5 V input models
12 V input models
15 V input models
24 V input models
for maximum of 1 second
3.3 V input models
5 V input models
12 V input models
15 V input models
24 V input models
capacitance filter
min
2.97
4.5
10.8
13.5
21.6
-0.7
-0.7
-0.7
-0.7
-0.7
typ
3.3
5
12
15
24
OUTPUT
parameter
line regulation
load regulation
voltage accuracy
switching frequency
temperature coefficient
conditions/description
for Vin change of 1%
3.3 V model
all other models
measured from 10% load to full load
3.3 V model
all other models
see tolerance envelope curve
100% load, nominal input voltage
100% load
min
typ
100
PROTECTIONS
parameter
short circuit protection
conditions/description
continuous, automatic recovery
min
typ
SAFETY AND COMPLIANCE
parameter
conditions/description
min
isolation voltage
for 1 minute at 1 mA max.
1,500
isolation resistance
conducted emissions
at 500 Vdc
1,000
CISPR22/EN55022, class B (external circuit required)
ESD
IEC/EN61000-4-2, class B, contact ±8KV
MTBF
RoHS compliant
MIL-HDBK-217F @ 25 °C
yes
3,500,000
typ
max
3.63
5.5
13.2
16.5
26.4
5
9
18
21
30
units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
max
±1.5
±1.2
20
15
300
±0.03
units
%
%
%
%
kHz
%/°C
max
units
max
units
Vdc
MΩ
hours
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PDS1-S12-S12-D (CUI)
DC-DC CONVERTER

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CUI Inc SERIES: PDS1-D DESCRIPTION: DC-DC CONVERTER
date 03/19/2013 page 3 of 6
ENVIRONMENTAL
parameter
operating temperature
storage temperature
storage humidity
temperature rise
SOLDERABILITY
parameter
hand soldering
wave soldering
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
see derating curve
non-condensing
at full load
min
-40
-55
conditions/description
1.5 mm from case for 10 seconds
see wave soldering profile
Peak Temp. 260°C Max.
250 Wave Soldering Time
4 Sec. Max.
200
10 Sec. Max.
150
min
100
50
0
Time (sec.)
conditions/description
12.7 x 10.0 x 8.20 (0.50 x 0.394 x 0.323 inch)
plastic (UL94-V0)
min
MECHANICAL DRAWING
units: mm[inch]
tolerance: ±0.25[±0.010]
pin section tolerance: ±0.10[±0.004]
typ max
105
125
95
25
typ max
300
260
typ max
1.8
∅1.00 [0.059]
4.10 [0.161]
5.08[0.200]
Front View
12.70[0.500]
7.62[0.300]
14
75
1.00 [0.039]
0.50[0.020]
Bottom View
cui.com
75
14
Grid Size:
2.54mm x 2.54mm
PCB Layout
Top View
PIN CONNECTIONS
PIN function
1 GND
4 Vin
5 +Vo
7 0V
units
°C
°C
%
°C
units
°C
°C
units
mm
g


PDS1-S12-S12-D (CUI)
DC-DC CONVERTER

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CUI Inc SERIES: PDS1-D DESCRIPTION: DC-DC CONVERTER
DERATING CURVES
date 03/19/2013 page 4 of 6
10
7.5
5
2.5
0
-2.5
-5
-7.5
-10
10
Tolerance Envelope Curve
Typical Load Line
20 30 40 50 60 70 80
Output Current Percentage (%)
(Nominal Input Voltage)
2.5
Rated Output Voltage
-2.5
-7.5
90 100
Temperature Derating Curve
100
80
60
Safe operating area
40
20
-40 -20
0 20 40 60
85
Ambient Temperature (°C)
105 120
EMC RECOMMENDED CIRCUIT
Vin
G ND
LDM
C1
Vi n + Vo
EUT
GND
0V
C2
LO AD
TEST CONFIGURATION
Oscilloscope
Lin
DC DCCurrent
Cin Probe
Load
Recommended external circuit components
Vin
(Vdc)
C1
LDM
C2
3.3 475K/50V 6.8μH
NC
5 475K/50V 6.8μH
NC
12 475K/50V 6.8μH
NC
15 475K/50V 6.8μH 470pF/2kV
24 475K/50V 6.8μH 470pF/2kV
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.
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PDS1-S12-S12-D (CUI)
DC-DC CONVERTER

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CUI Inc SERIES: PDS1-D DESCRIPTION: DC-DC CONVERTER
date 03/19/2013 page 5 of 6
APPLICATION NOTES
1. 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.
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 1). 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 1).
Figure 1
Table 1
Vin
Cin
GND
DC DC
Cout
+Vo
0V
Vin
(Vdc)
3.3
5
12
15
24
--
Cin
(µF)
4.7
4.7
2.2
1
1
--
Vo
(Vdc)
3.3
5
9
12
15
24
Cout
(µF)
10
10
4.7
2.2
1
0.47
It’s not recommended to connect any external capacitors in applications with less than 0.5 watt output.
4. Output Voltage Regulation and Over-voltage Protection Circuit
The device for output voltage regulation, over-voltage and over-current protection is a linear regulator and a capacitor filtering net-
work with overheat protection which can be connected to the input or output end in series (see Figure 2). The recommended capaci-
tance of its filter capacitor (see Table 1), and the linear regulator is based on the actual voltage and current required.
Figure 2
Vin
GND
REG
DC DC
REG
+Vo
0V
Note:
1. Operation under minimum load will not damage the converter; however, they may not meet all specifications listed.
2. Max. capacitive load tested at input voltage range and full load.
3. All specifications measured at: Ta=25°C, humidity<75%, nominal input voltage and rated output load, unless otherwise specified.
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PDS1-S12-S12-D (CUI)
DC-DC CONVERTER

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CUI Inc SERIES: PDS1-D DESCRIPTION: DC-DC CONVERTER
date 03/19/2013 page 6 of 6
REVISION HISTORY
rev.
1.0
description
date
initial release
03/19/2013
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.




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