* "D24" models only
Figure 1. Simplifi ed Block Diagram
+V
IN
–V
IN
+V
OUT
PWM
*
COMMON
Typical topology is shown
The migration to distributed power is accelerat-
ing. The critical need for accurate voltages, tight
regulation and rapid transient response is propel-
ling the move to power processing at the "point-of-
use" with low-power DC/DC converters physically
located right at their loads.
DATEL’s miniature, full featured, 5 Watt UWR
Models were specifi cally designed for today’s
demanding distributed power architectures in
aerospace, marine, telecom and computer applica-
tions. The converters' low cost, small size (1" x
1" x 0.45") and full 5 Watt output capability give
system architects unprecedented design and layout
fl exibility.
Occupying less than 0.5in3 total volume, these
extremely compact, fully regulated and isolated
(1000Vdc guaranteed) modules are available with
either 5, 12 or 15 Volt outputs. Input voltage ranges
are either 18-36 Volts ("D24" models) or 36-72
Volts ("D48" models).
Although their overall size is 50-75% smaller
than many similarly rated power modules, these
1" x 1" UWR Models are exact, drop-in, pin-for-
pin replacements for many standard 2" x 1" and
2" x 2", 5 Watt modules. They achieve their small
size and low cost by exploiting a novel feedback
approach that does not depend upon traditional
optocoupler techniques.
All models are 5-side shielded and have a
non-conductive baseplate that permits pc-card
runs to be placed beneath the package. Units
are assembled using high-speed automated
SMT techniques and are fully encapsulated with
thermally conductive potting compound. Every unit
is electrically tested before and after encapsulation,
100% burned-in under full load, hi-pot tested, and
fi nal-electrical tested prior to shipment. Every unit
meets DATEL’s traditional high standards for quality
and long-term reliability.
PRODUCT OVERVIEWFEATURES
Small size, 1" x 1" x 0.45"
Full 5 Watts output power
No external components required
Drop-in replacements for many standard,
2" x 1" DC/DCs
Wide input voltage ranges:
18-36V or 36-72V
5, 12, or 15V outputs
Guaranteed effi ciencies to 80%
Fully regulated and isolated
(1000Vdc guaranteed)
Output overvoltage protection and current
limiting
–25 to +95°C operating temperature
Shielded cases (5 sides)
UL 1950, CSA 22.2 No. 234, IEC 950
Modifi cations and customs for OEM's
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www.murata-ps.com/support
For full details go to
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UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
UWR5W_C02 Page 1 of 5
Notes:
For "D24" models, the case
is connected to pin 2 (–VIN).
For "D48" models, the case
is connected to pin 1 (+VIN).
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted.
➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth.
➂ 20% to 100% load.
➃ Nominal line voltage, no-load/full-load conditions.
➄ RoHS-6 hazardous substance compliance does not claim EU exemption 7b (lead in solder).
METAL CASE
INSULATED BASE
0.040 ± 0 .002 D IA.
(1.016 ±0 .05 1 )
1.00
(25.40)
0.45
(11.43)
0.20 MIN .
(5.08)
0.200
(5.08)
0.10
(2.54)
1.00
(25.40)
0.800
(20.32)
0.100
(2.54)
0.800
(20.32)
0.200
(5.08)
0.400
(10.16)
0.10
(2.54)
BOTTOM VIEW
3
1
24
6
5
Case C7
15U WR 335 D24
-/-
Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-72 Volts (48V nominal)
Maximum Output Current
in mA
Nominal Output Voltage
5, 12 or 15 Volts
Wide Range Input
Output Confi guration:
U = Unipolar
RoHS-6 hazardous
substance compliant*
C
* Contact Murata Power Solutions
(Datel) for availability.
-
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
Output Power (Watts)
Ambient Temperature (°C)
TEMPERATURE DERATING
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀
Model
Output Input
Effi ciency
(Min.)
Package
(Case, Pinout)
Vout
(Volts)
Iout
(mA, max)
Ripple/Noise ➁
(mVp-p, Max.)
Regulation (Max.)
Vin Nom.
(Volts)
Range
(Volts)
Iin➃
(mA, Max.)Line Load ➂
UWR-5/1000-D24 5 1000 120 ±2% ±2% 24 18-36 25/282 75% C7, P3
UWR-5/1000-D48 5 1000 120 ±2% ±2% 48 36-72 25/141 75% C7, P3
UWR-12/420-D24 12 420 150 ±2% ±2% 24 18-36 25/265 80% C7, P3
UWR-12/420-D48 12 420 150 ±2% ±2% 48 36-72 25/133 80% C7, P3
UWR-15/335-D24 15 335 150 ±2% ±2% 24 18-36 25/264 80% C7, P3
UWR-15/335-D48 15 335 150 ±2% ±2% 48 36-72 25/134 79% C7, P3
INPUT/OUTPUT CONNECTIONS
Pin Function P3
1+Vin
2–Vin
3+Vout
4No Pin
5No Pin
6Common
Third Angle Projection
Dimensions are in inches (mm shown for ref. only).
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
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UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
UWR5W_C02 Page 2 of 5
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating."
Users may ground either the Common (pin 6) for normal usage or the posi-
tive side (+Output, pin 3) to effectively reverse the output polarity.
Filtering and Noise Reduction
All UWR 5 Watt DC/DC Converters achieve their rated ripple and noise
specifi cations without the use of external input/output capacitors. In criti-
cal applications, input/output ripple and noise may be further reduced by
installing low-ESR, tantalum or electrolytic capacitors across the input
and/or output terminals. The capacitors should be located as close to the
power converters as possible. Typical values are listed below. In many
applications, using values greater than those listed will yield better results.
To Reduce Input Ripple
"D24" Models 20µF, 50V
"D48" Models 10µF, 100V
To Reduce Output Ripple
5V Outputs 47µF, 10V, Low ESR
12/15V Outputs 33µF, 20V, Low ESR
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL UWR
5 Watt DC/DC Converters, you should use fast-blow type fuses with values
no greater than 0.5A.
ABSOLUTE MAXIMUM RATINGS
TECHNICAL NOTES
Input Voltage:
"D24" Models 40 Volts
"D48" Models 80 Volts
Input Reverse-Polarity Protection Current must be < 6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection:
5V Outputs 6.8 Volts, limited duration
12V Outputs 15 Volts, limited duration
15V Outputs 18 Volts, limited duration
Output Current Current limited. Max. current and
short-circuit duration are model
dependent.
Storage Temperature –55 to +125°C
Lead Temperature (soldering, 10 sec.) +300°C
These are stress ratings. Exposure of devices to greater than any of these conditions
may adversely affect long-term reliability. Proper operation under conditions other than
those listed in the Performance/Functional Specifi cations Table is not implied.
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
➀ These power converters require a minimum 20% loading to maintain specifi ed regulation.
Operation under no-load conditions will not damage these devices; however
they may not meet all listed specifi cations.
INPUT
Input Voltage Range:
"D24" Models 18-36 Volts (24V nominal)
"D48" Models 36-72 Volts (48V nominal)
Input Current See Ordering Guide
Input Filter Type ➁ LC on "D24" models
C on "D48" models
Reverse-Polarity Protection Yes (Instantaneous, 6A maximum)
OUTPUT
VOUT Accuracy (50% load):
5V Outputs ±1.5%, maximum
12/15V Outputs ±1%, maximum
Temperature Coeffi cient ±0.02% per °C
Ripple/Noise (20MHz BW) ➁ See Ordering Guide
Line Regulation See Ordering Guide
Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage ➂ 1000Vdc, minimum
Current Limiting Auto-recovery
Overvoltage Protection Zener/transorb clamp
DYNAMIC CHARACTERISTICS
Transient Response (50% load step) 500µsec max. to ±2% of fi nal value
Switching Frequency 170kHz (±10kHz)
ENVIRONMENTAL
Operating Temperature (Ambient): ➃
Without Derating –25 to +60°C
With Derating to +95°C (See Derating Curve)
Storage Temperature –55 to +125°C
Flammability UL94V-0
PHYSICAL
Dimensions 1" x 1" x 0.45" (25.4 x 25.4 x 11.4mm)
Shielding 5-sided
Case Connection:
"D24" Models Pin 2 (–VIN)
"D48" Models Pin 1 (+VIN)
Case Material Corrosion resistant steel with
non-conductive, powder coat matte black
fi nish and plastic baseplate
Pin Material Gold plate over copper alloy
Weight 0.7 ounces (20 grams)
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UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
UWR5W_C02 Page 3 of 5
81
80
79
78
77
76
75
Efficiency (%)
Input Voltage (Volts)
Efficiency vs. Input Voltage
(Full-load conditions. Guaranteed efficiency = 75% at VIN = 24V )
18 21 24 27 30 33 36
The performance curves below were derived from actual test data for a single model number (UWR-5/1000-D24). Since all devices in this Series have the same circuit topology, the
performance curves are representative of all devices.
TYPICAL PERFORMANCE CURVES (TA = +25°C)
EFFICIENCY VS. INPUT VOLTAGE AND OUTPUT LOAD
LINE REGULATION LOAD REGULATION
82
80
78
76
74
72
70
Efficiency (%)
Output Current (Amps)
Efficiency vs. Output Load
(VIN = nominal = 24V. Guaranteed efficiency at full load = 75%)
0.2 0.4 0.6 0.8 1.0
5.15
5.10
5.05
5.00
4.95
4.90
4.85
Output Voltage (Volts)
Input Voltage (Volts)
Output Voltage vs.Input Voltage
(Full-load conditions. Nominal
V
OUT = 5V)
18 21 24 27 30 33 36
5.06
5.04
5.02
5.00
4.98
4.96
4.94
Output Voltage (Volts)
Output Current (Amps)
Output Voltage vs. Output Load
(VIN = nominal = 24V. Nominal VOUT = 5V)
0.2 0.4 0.6 0.8 1.0
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UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
UWR5W_C02 Page 4 of 5
If you’re designing with EMC in mind, please note that all of DATEL’s UWR
5 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 specifi cations
can be supplied upon request. Radiated emissions plots to FCC and CISPR
22 for model UWR-5/1000-D24 appear below. Its performance is typical of
all models in the Family.
EMI RADIATED EMISSIONS
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
quality-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 indus-
trial applications. We may already have the converter you need.
Contact us. Our goal is to provide you the highest-quality, most cost-
effective power converters available.
CUSTOM CAPABILITIES
UWR-5/1000-D24 Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = 5Vdc @ 800mA
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 100
0
Radiated Emissions
FCC Class B Limit
Radiated Emissions (dBµV/M)
UWR-5/1000-D24 Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = 5Vdc @ 800mA
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 100
0
Radiated Emissions
EN 55022 Class B Limit
Radiated Emissions (dBµV/M)
www.murata-ps.com/support
Murata Power Solutions, 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. Specifi cations are subject to change without
notice. © 2012 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
UWR5W_C02 Page 5 of 5
