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SERIES: PDS1-M │ DESCRIPTION: DC-DC CONVERTER
07/03/2018
date
page 1 of 8
FEATURES
• 1 W isolated output
• smaller package
• single and dual unregulated outputs
• 1,500 Vdc isolation
• short circuit protection
• extended temperature range (-40~105°C)
• antistatic protection up to 8kV
• high efficiency at light load
• efficiency up to 82%
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
(%)
PDS1-S3-S3-M 3.3 2.97~3.63 3.3 30 303 1 60 69
PDS1-S3-S5-M13.3 2.97~3.63 5 20 200 1 60 74
PDS1-S3-D5-M 3.3 2.97~3.63 ±5 ±10 ±100 1 60 76
PDS1-S3-D12-M 3.3 2.97~3.63 ±12 ±5 ±42 1 60 77
PDS1-S3-D15-M 3.3 2.97~3.63 ±15 ±3 ±33 1 60 78
PDS1-S5-S3-M15 4.5~5.5 3.3 30 303 1 60 72
PDS1-S5-S5-M15 4.5~5.5 5 20 200 1 60 80
PDS1-S5-S9-M15 4.5~5.5 9 12 111 1 60 80
PDS1-S5-S12-M15 4.5~5.5 12 9 84 1 60 80
PDS1-S5-S15-M15 4.5~5.5 15 7 67 1 60 80
PDS1-S5-S24-M15 4.5~5.5 24 4 42 1 60 80
PDS1-S5-D5-M 5 4.5~5.5 ±5 ±10 ±100 1 60 80
PDS1-S5-D9-M 5 4.5~5.5 ±9 ±6 ±56 1 60 80
PDS1-S5-D12-M 5 4.5~5.5 ±12 ±5 ±42 1 60 79
PDS1-S5-D15-M 5 4.5~5.5 ±15 ±3 ±33 1 60 81
PDS1-S5-D24-M 5 4.5~5.5 ±24 ±2 ±21 1 60 81
PDS1-S12-S3-M112 10.8~13.2 3.3 30 303 1 60 72
PDS1-S12-S5-M112 10.8~13.2 5 20 200 1 60 80
PDS1-S12-S9-M112 10.8~13.2 9 12 111 1 60 80
PDS1-S12-S12-M112 10.8~13.2 12 9 84 1 60 80
PDS1-S12-S15-M112 10.8~13.2 15 7 67 1 60 80
PDS1-S12-D5-M 12 10.8~13.2 ±5 ±10 ±100 1 60 80
PDS1-S12-D9-M 12 10.8~13.2 ±9 ±6 ±56 1 60 80
PDS1-S12-D12-M 12 10.8~13.2 ±12 ±5 ±42 1 60 81
PDS1-S12-D15-M 12 10.8~13.2 ±15 ±3 ±33 1 60 81
PDS1-S12-D24-M 12 10.8~13.2 ±24 ±2 ±21 1 60 81
PDS1-S15-S15-M 15 13.5~16.5 15 7 67 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: PDS1-M │ DESCRIPTION: DC-DC CONVERTER date 07/03/2018 │ page 2 of 8
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
measured from 10% load to full load
3.3 Vdc output models
5 Vdc output models
9 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
18
12
8
7
6
5
%
%
%
%
%
%
voltage accuracy see tolerance envelope curve
switching frequency 100% load, nominal input voltage 100 kHz
temperature coecient 100% load ±0.03 %/°C
PDS1 - SXX - XXX - M - X
Input Voltage Output VoltageOutput
S = single
D = dual
Base Number Packaging Style
SMT
Package Options
"blank" = standard
TR = Tape & Reel
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
(%)
PDS1-S24-S5-M124 21.6~26.4 5 20 200 1 60 80
PDS1-S24-S9-M124 21.6~26.4 9 12 111 1 60 80
PDS1-S24-S12-M 24 21.6~26.4 12 9 84 1 60 80
PDS1-S24-S15-M124 21.6~26.4 15 7 67 1 60 80
PDS1-S24-S24-M124 21.6~26.4 24 4 42 1 60 80
PDS1-S24-D5-M 24 21.6~26.4 ±5 ±10 ±100 1 60 80
PDS1-S24-D9-M 24 21.6~26.4 ±9 ±6 ±56 1 60 80
PDS1-S24-D12-M 24 21.6~26.4 ±12 ±5 ±42 1 60 81
PDS1-S24-D15-M 24 21.6~26.4 ±15 ±3 ±33 1 60 82
PDS1-S24-D24-M 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
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CUI Inc │ SERIES: PDS1-M │ DESCRIPTION: DC-DC CONVERTER date 07/03/2018 │ page 3 of 8
0
50
100
150
200
250
Time (sec.)
Temperature ( )
Peak.Temp245
(Max
.)
245
217
60 Max
(>217)
Sec
˚
C
˚
C
˚
C
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection1
3 & 24 Vdc input models
PDS1-S5-S12-M, PDS1-S5-D24-M
all other models: automatic recovery
1
1
s
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 at 1 mA max. 1,500 Vdc
isolation resistance input to output at 500 Vdc 1,000 MΩ
isolation capacitance input to output at 100 kHz/0.1 V 20 pF
safety approvals2UL 60950-1
conducted emissions CISPR32/EN55032, class B (external circuit required, see Figure 1)
radiated emissions CISPR32/EN55032, class B (external circuit required, see Figure 1)
ESD IEC/EN 61000-4-2, class B, contact ±8kV (single output models)
IEC/EN 61000-4-2, class B, contact ±6kV (dual output models)
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 full load, 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
reow soldering see reow soldering prole 245 °C
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CUI Inc │ SERIES: PDS1-M │ DESCRIPTION: DC-DC CONVERTER date 07/03/2018 │ page 4 of 8
PIN CONNECTIONS
PIN Function
1 GND
2 Vin
4 0V
5+Vo
8 NC
units: mm[inch]
tolerance: ±0.25[±0.010]
pin section tolerance: ±0.10[±0.004]
MECHANICAL
parameter conditions/description min typ max units
dimensions single output models: 12.7 x 8.30 x 7.25
dual output models: 15.24 x 8.30 x 7.25
mm
mm
case material epoxy resin (UL94-V0)
weight single output models
dual output models
1.6
2.0
g
g
MECHANICAL DRAWING
SINGLE OUTPUT MODELS
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CUI Inc │ SERIES: PDS1-M │ DESCRIPTION: DC-DC CONVERTER date 07/03/2018 │ page 5 of 8
PIN CONNECTIONS
PIN Function
1 GND
2 Vin
4 0V
5-Vo
7+Vo
10 NC
units: mm[inch]
tolerance: ±0.25[±0.010]
pin section tolerance: ±0.10[±0.004]
MECHANICAL DRAWING (CONTINUED)
DUAL OUTPUT MODELS
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CUI Inc │ SERIES: PDS1-M │ DESCRIPTION: DC-DC CONVERTER date 07/03/2018 │ page 6 of 8
EMC RECOMMENDED CIRCUIT
Vin
GND
+Vo
0V
DC /DC
LO AD
LD M
C1
Vin
GND
C2
Recommended external circuit components
Vin
(Vdc) C1 C21LDM CY2
3.3 4.7μF/50V -6.8μH -
54.7μF/50V -6.8μH -
12 4.7μF/50V -6.8μH -
15 4.7μF/50V -6.8μH 1nF/2kV
24 4.7μF/50V -6.8μH 1nF/2kV
Figure 1
Table 1
Vin
GND
+Vo
-Vo
DC/DC
LOAD
LDM
C1
Vin
GND
C2
CY
Single Outputs
Dual Outputs
DERATING CURVES
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 020406080 105 120
Temperature Derating Curve
Safe operating area
100
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
Note: 1. See Cout values in Tables 2 & 3.
2. 24 Vdc output models require CY also.
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CUI Inc │ SERIES: PDS1-M │ DESCRIPTION: DC-DC CONVERTER date 07/03/2018 │ page 7 of 8
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).
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 ltering net-
work with overheat protection which can be connected to the input or output end in series (see Figure 4). The recommended capaci-
tance of its lter capacitor (see Table 3), and the linear regulator is based on the actual voltage and current required.
APPLICATION NOTES
Vin
GN
D
0V
+Vo
DC DC
REGREG
Vin
GND
0V
+V
o
DC DC
-Vo
REGREG
REG
Dual OutputSingle Output
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.
Figure 2
Figure 3
Vin
GND
+Vo
0V
DC
Cin
DC
Cout
Cout
-Vo
Dual OutputSingle Output
Vin
GND
+Vo
0V
DC
Cin
DC
Cout
Vin
(Vdc)
Cin
(µF)
Single Vo
(Vdc)
Cout
(µF)
Dual Vo
(Vdc)
Cout
(µF)
3.3 4.7 3.3 10 - -
5 4.7 5 10 ±5 4.7
12 2.2 9 4.7 ±9 2.2
15 2.2 12 2.2 ±12 1
24 1 15 1 ±15 1
- - 24 0.47 ±24 0.47
Single Vout
(Vdc)
Max. Capacitive Load
(μF)
Dual Vout
(Vdc)
Max. Capacitive Load1
(μF)
3.3 220 - -
5 220 5 100
9 220 9 100
12 220 12 100
15 220 15 100
24 220 24 100
Table 2
Note: It’s not recommended to connect any external capacitors in
applications with less than 0.5 watt output.
Table 3
Note: 1. For each output.
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CUI Inc │ SERIES: PDS1-M │ DESCRIPTION: DC-DC CONVERTER date 07/03/2018 │ page 8 of 8
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 PDS1-S24-S12-M model 06/11/2013
1.02 added dual output models 02/17/2014
1.03 added models PDS1-S3-S3-M, PDS1-S3-S5-M, PDS1-S5-S3-M, and
PDS1-S12-S3-M 04/18/2014
1.04 added UL approval to some models, updated spec 10/03/2014
1.05 updated datasheet 07/03/2018
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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