Single Output
UST Models
Low-Cost, High-Reliability
3 Watt, DC/DC Converters
Features
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Lowest cost! Highest reliability!
100% SMT-on-pcb, including magnetics
100% automatically assembled
Standard "DIP" package and pinouts
Fully isolated, 1000Vdc guaranteed
5, 12 or 15 Volt outputs
Choice of 3 wide-range inputs:
4.5-9 Volts
9-18 Volts
18-72 Volts
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Guaranteed efficiencies to 73%
–40 to +75°C full-power operation
Internal input/output filtering
UL1950/C22.2 No. 950/IEC950 certified
Modifications and customs for OEM’s
Rarely, has a Series of low-power DC/DC converters been defined by both low
cost and DATEL's made-in-the-USA quality and reliability. Our new UST Series of
single-output DC/DC’s achieves this best-of-both-worlds status by implementing
a proven circuit architecture (170-200kHz flyback design) as a full, SMT-on-pcb
assembly (including surface-mount magnetics) that is truly 100% automatically
assembled. Packaged in miniature 1.25" x 0.8", DIP-like plastic packages (UL94V-0
rated) and requiring no external components, UST Series DC/DC’s bring true com-
ponent-like convenience to designers of today’s distributed power systems.
Output voltages are 5, 12 or 15 Volts. Input voltage ranges are 4.5-9V ("D5"
models), 9-18V ("D12" models) or an ultra-wide 18-72V ("D48" models). UST
DC/DC’s are fully isolated (1000Vdc guaranteed) and include input (pi type) and
output filters within their package. Output transient response is a quick 200µsec,
while output ripple and noise are typically 75mVp-p.
These rugged modules are fully encapsulated with a thermally conductive pot-
ting compound that contributes to their outstanding moisture/vibration resistance
and impressive MTBF. They operate over the full –40 to +75°C temperature range
without derating. All models have been thoroughly characterized (electrically, me-
chanically and thermally), qualified (including HALT), and EMI/EMC tested. Addition-
ally, they are certified to UL1950, CSA 22.2 No. 950 and IEC950.
DATEL’s UST Model 3W DC/DC’s are excellent selections for telecom/datacom,
computer and process-control applications demanding small size, low cost and high
reliability. If required, their design "flexibility" allows for easy modification to your ap-
plication-specific requirements.
+V
IN
+V
OUT
COMMON
–V
IN
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
Figure 1. Simplified Schematic
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XST Series
3W, SINGLE OUTPUT DC/DC CONVERTERS
Performance Specifications and Ordering Guide
Output
Model
UST-5/500-D5
UST-5/500-D12
UST-5/500-D48
UST-12/250-D5
UST-12/250-D12
UST-12/250-D48
UST-15/200-D5
UST-15/200-D12
UST-15/200-D48
➀
➁
➂
➃
➀
Input
Regulation (Max.)
➂
Line
Load
±0.2%
±0.2%
±0.2%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
V
OUT
(Volts)
5
5
5
12
12
12
15
15
15
I
OUT
(mA, Max.)
500
500
500
250
250
250
200
200
200
R/N (mVp-p)
➁
Typ.
Max.
75
75
75
75
75
75
75
75
75
120
120
120
150
150
150
150
150
150
V
IN
Nom.
(Volts)
5
12
48
5
12
48
5
12
48
Range
(Volts)
4.5-9
9-18
18-72
4.5-9
9-18
18-72
4.5-9
9-18
18-72
I
IN
➃
(mA)
18/676
25/282
7/69
30/800
25/338
8/81
30/800
25/333
8/81
Efficiency
Min.
Typ.
72%
70%
71%
73%
72%
73%
73%
73%
73%
74%
74%
75%
75%
74%
77%
75%
75%
77%
Package
(Case,
Pinout)
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
C1, P1
Typical at T
A
= +25°C under nominal line voltage and full-load conditions unless otherwise noted.
Ripple/Noise (R/N) measured over a 20MHz bandwidth.
10% to 100% load.
Nominal line voltage, no-load/full-load conditions.
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
1.25
(31.75)
U ST
-
5
/
500
-
D48
-
C
Output Configuration:
U
= Unipolar
Product Series
Nominal Output Voltage:
5, 12 or 15 Volts
Maximum Output Current
in mA
RoHS-6
compliant*
Input Voltage Range:
D5
= 4.5-9 Volts (5V nominal)
D12
= 9-18 Volts (12V nominal)
D48
= 18-72 Volts (48V nominal)
0.45
(11.43)
STANDOFFS
0.025
(0.64)
Case C1
0.020 ±0.002 DIA.
(0.508 ±0.051)
0.600
(15.24)
0.15 MIN
(3.81)
0.200
(5.08)
0.100
(2.54)
0.18
(4.57)
*
Contact C&D Technologies (Datel)
for availability.
TEMPERATURE DERATING
3 4
7
8
0.600
(15.24)
1 2
5
6
0.80
(20.32)
Output Power vs. Ambient Temperature
V
IN
Nominal, Natural Convection
3.5
3
BOTTOM VIEW
PLASTIC CASE WITH AN INSULATED BASE
0.10
(2.54)
Output Power (Watts)
2.5
DIMENSIONS ARE IN INCHES (MM)
2
I/O Connections
1.5
1
0.5
0
–40
0
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95 100
Ambient Temperature (
˚
C)
Pin
1
2
3
4
5
6
7
8
Function P1
+Input
+Input
–Input
–Input
Common
+Output
Common
+Output
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2
3 W, S I N G L E O U T P U T D C / D C C O N V E RT E R S
UST Models
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
➀
Input
Input Voltage Range:
"D5" Models
"D12" Models
"D48" Models
Input Current
Input Filter Type
➁
Reverse-Polarity Protection
V
OUT
Accuracy
(50% load)
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➁
Line/Load Regulation
Efficiency
Isolation Voltage
➂
Short Circuit Protection:
➃
"D5" Models
"D12" and "D48" Models
Transient Response
(50% load step)
Switching Frequency:
"D48" Models
"D5" and "D12" Models
Operating Temperature
(Ambient, no derating)
Storage Temperature
Dimensions
Case Material
Pin Material
Weight
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
See Ordering Guide
Pi
Yes (Instantaneous, 2A maximum)
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
Absolute Maximum Ratings
12 Volts
20 Volts
80 Volts
Current must be <2A. Brief duration
only. Fusing recommended.
None
Maximum current and short-circuit
duration are model dependent. "D12"
and "D48" models can withstand
sustained output short circuits.
–55 to +100°C
+280°C
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Output
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1000Vdc, minimum
Power-limiting technique, auto-recovery
Hiccup technique, auto-recovery
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specifications Table is not implied.
Dynamic Characteristics
200µsec to ±1.5% of final value
TECHNICAL NOTES
200kHz
170kHz
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
Users may ground either the Common (pins 5 and 7) for normal usage or
the positive side (+Output, pins 6 and 8) to effectively reverse the output
polarity.
Filtering and Noise Reduction
All UST 3 Watt DC/DC Converters achieve their rated ripple and noise speci-
fications without the use of external input/output capacitors. In critical ap-
plications, input/output ripple and noise may be further reduced by installing
electrolytic capacitors across the input terminals and/or low-ESR tantalum
or electrolytic capacitors across the output terminals. The caps should be
located as close to the power converters as possible. Typical values are
listed in the tables below. In many applications, using values greater than
those listed will yield better results.
To Reduce Input Ripple
"D5" Models
"D12" Models
"D48" Models
To Reduce Output Ripple
5V Outputs
12/15V Outputs
47µF, 15V
10µF, 35V
4.7µF, 100V
47µF, 10V, Low ESR
22µF, 20V, Low ESR
Environmental
–40 to +75°C
–40 to +100°C
Physical
1.25" x 0.8" x 0.45" (31.8 x 20.3 x 11.4mm)
Diallyl phthalate, UL94V-0-rated
Brass, solder coated
0.5 ounces (14.2 grams)
➀
These power converters require a minimum 10% loading to maintain specified regulation.
Operation under no-load conditions will not damage these devices; however
they may not meet all listed specifications.
➁
Application-specific internal input/output filtering can be recommended and perhaps
added internally upon request. Contact DATEL Applications Engineering for details.
➂
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
➃
The current limit inception point is dependent on the input voltage. Therefore, it is possible
to draw current beyond the rated capacity. Users should fully characterize their load
conditions.
In critical, space-sensitive applications, DATEL may be able to tailor the in-
ternal input/output filtering of these units to meet your specific requirements.
Contact our Applications Engineering Group for additional details.
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3
XST Series
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL UST 3
Watt DC/DC Converters, you should use slow-blow type fuses with values
no greater than the following:
V
IN
Range
"D5"
"D12"
"D48"
Fuse Value
1.5A
1A
0.5A
3W, SINGLE OUTPUT DC/DC CONVERTERS
EMI RADIATED EMISSIONS
If you’re designing with EMC in mind, please note that all of DATEL’s
UST 3 Watt DC/DC Converters have been characterized for radiated and
conducted emissions in our new EMI/EMC laboratory. Testing is conducted
in an EMCO 5305 GTEM test cell utilizing EMCO automated EMC test
software. Radiated emissions are tested to the limits of FCC Part 15, Class
B and CISPR 22 (EN 55022), Class B. Correlation to other specifications
can be supplied upon request. Radiated emissions plots to FCC and CISPR
22 for model UST-5/500-D48 appear below. Published EMC test reports are
available for each model number. Contact DATEL’s Applications Engineering
Department for more details.
CUSTOM CAPABILITIES
DATEL’s world-class design, development and manufacturing team stands
ready to work with you to deliver the exact power converter you need for
your demanding, large volume, OEM applications. And ... we’ll do it on time
and within budget!
Our experienced applications and design staffs; quick-turn prototype
capability; highly automated, SMT assembly facilities; and in-line SPC qual-
ity-control techniques combine to give us the unique ability to design and
deliver any quantity of power converters to the highest standards of quality
and reliability.
We have compiled a large library of DC/DC designs that are currently used
in a variety of telecom, medical, computer, railway, aerospace and industrial
applications. We may already have the converter you need.
Contact us. Our goal is to provide you the highest-quality, most cost-effec-
tive power converters available.
C&D Technologies (NCL), Ltd.
Milton Keynes, United Kingdom, Tel: 44 (0) 1908 615232
Internet: www.cd4power.com E-mail: ped.ltd@cdtechno.com
C&D Technologies (DATEL) S.A.R.L.
Montigny Le Bretonneux, France Tel: 01-34-60-01-01
Internet: www.cd4power.com E-mail: ped.sarl@cdtechno.com
C&D Technologies (DATEL), Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.cd4power.com
ISO 9001 REGISTERED
C&D Technologies (DATEL) GmbH
München, Germany Tel: 89-544334-0
Internet: www.cd4power.com E-mail: ped.gmbh@cdtechno.com
C&D Technologies KK
Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-6354-2025
Int.: www.cd4power.jp Email: sales_tokyo@cdtechno.com, sales_osaka@cdtechno.com
04/06
Email: sales@cdtechno.com
DS-0444
China
Shanghai, People's Republic of China Tel: 86-50273678
Internet: www.cd4power.com E-mail: shanghai@cdtechno.com
C&D Technologies (DATEL), Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the
granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered trademark of C&D Technologies, Inc..
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