Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
FEATURES
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 efficiencies 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
Modifications and customs for OEM's
PRODUCT OVERVIEW
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 specifically 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
flexibility.
Occupying less than 0.5in
3
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
final-electrical tested prior to shipment. Every unit
meets DATEL’s traditional high standards for quality
and long-term reliability.
+V
IN
*
PWM
+V
OUT
COMMON
* "D24" models only
Typical topology is shown
–V
IN
Figure 1. Simplified Block Diagram
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
email: sales@murata-ps.com
01 Mar 2010
UWR5W_B03
Page 1 of 5
UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
Performance Specifications and Ordering Guide
➀
ORDERING GUIDE
Output
Regulation (Max.)
Model
UWR-5/1000-D24
UWR-5/1000-D48
UWR-12/420-D24
UWR-12/420-D48
UWR-15/335-D24
UWR-15/335-D48
Input
Vin Nom. Range
Iin➃
(Volts) (Volts) (mA, Max.)
24
48
24
48
24
48
18-36
36-72
18-36
36-72
18-36
36-72
25/282
25/141
25/265
25/133
25/264
25/132
Vout
(Volts)
5
5
12
12
15
15
Iout
(mA, max)
1000
1000
420
420
335
335
Ripple/Noise
➁
(mVp-p, Max.)
120
120
150
150
150
150
Line
±2%
±2%
±2%
±2%
±2%
±2%
Load
➂
±2%
±2%
±2%
±2%
±2%
±2%
Efficiency
(Min.)
75%
75%
80%
80%
80%
80%
Package
(Case, Pinout)
C7, P3
C7, P3
C7, P3
C7, P3
C7, P3
C7, P3
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).
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
1.00
(25.40)
METAL CASE
0.45
(11.43)
U WR
-
15
/
335
-
D24
-
C
Output Configuration:
U
= Unipolar
RoHS-6 hazardous
substance compliant*
Input Voltage Range:
D24
= 18-36 Volts (24V nominal)
D48
= 36-72 Volts (48V nominal)
Maximum Output Current
in mA
*
Contact Murata Power Solutions
(Datel) for availability.
0.20 MIN.
(5.08)
Case C7
INSULATED BASE
0.040 ±0.002 DIA.
(1.016 ±0.051)
0.800
(20.32)
0.10
(2.54)
Wide Range Input
Nominal Output Voltage
5, 12 or 15 Volts
0.100
(2.54)
1
3
0.400
(10.16)
4
2
5
1.00
0.800
(20.32) (25.40)
0.200
(5.08)
6
BOTTOM VIEW
0.200
(5.08)
0.10
(2.54)
TEMPERATURE DERATING
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
–25
0
35
40
45
50
55
60
65
0
5
80
85
0
5
Notes:
For "D24" models, the case
is connected to pin 2 (–V
IN
).
For "D48" models, the case
is connected to pin 1 (+V
IN
).
INPUT/OUTPUT CONNECTIONS
Pin
Function P3
1
2
3
4
5
6
+Input
–Input
+Output
No Pin
No Pin
Common
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
www.murata-ps.com
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01 Mar 2010
UWR5W_B03
Page 2 of 5
UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
➀
INPUT
Input Voltage Range:
"D24" Models
"D48" Models
Input Current
Input Filter Type
➁
Reverse-Polarity Protection
V
OUT
Accuracy
(50% load):
5V Outputs
12/15V Outputs
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➁
Line Regulation
Load Regulation
Efficiency
Isolation Voltage
➂
Current Limiting
Overvoltage Protection
Transient Response
(50% load step)
Switching Frequency
Operating Temperature
(Ambient):
➃
Without Derating
With Derating
Storage Temperature
Flammability
Dimensions
Shielding
Case Connection:
"D24" Models
"D48" Models
Case Material
18-36 Volts (24V nominal)
36-72 Volts (48V nominal)
See Ordering Guide
LC on "D24" models
C on "D48" models
Yes (Instantaneous, 6A maximum)
ABSOLUTE MAXIMUM RATINGS
Input Voltage:
"D24" Models
"D48" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection:
5V Outputs
12V Outputs
15V Outputs
Output Current
40 Volts
80 Volts
Current must be < 6A. Brief
duration only. Fusing recommended.
6.8 Volts, limited duration
15 Volts, limited duration
18 Volts, limited duration
Current limited. Max. current and
short-circuit duration are model
dependent.
–55 to +125°C
+300°C
OUTPUT
±1.5%, maximum
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
See Ordering Guide
1000Vdc, minimum
Auto-recovery
Zener/transorb clamp
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
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 Specifications Table is not implied.
DYNAMIC CHARACTERISTICS
500µsec max. to ±2% of final value
170kHz (±10kHz)
TECHNICAL NOTES
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
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
specifications 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
"D48" Models
To Reduce Output Ripple
5V Outputs
12/15V Outputs
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.
20µF, 50V
10µF, 100V
47µF, 10V, Low ESR
33µF, 20V, Low ESR
ENVIRONMENTAL
–25 to +60°C
to +95°C (See Derating Curve)
–55 to +125°C
UL94V-0
PHYSICAL
1" x 1" x 0.45" (25.4 x 25.4 x 11.4mm)
5-sided
Pin 2 (–V
IN
)
Pin 1 (+V
IN
)
Corrosion resistant steel with
non-conductive, powder coat matte black
finish and plastic baseplate
Gold plate over copper alloy
0.7 ounces (20 grams)
Pin Material
Weight
➀
These power converters require a minimum 20% loading to maintain specified regulation.
Operation under no-load conditions will not damage these devices; however
they may not meet all listed specifications.
www.murata-ps.com
email: sales@murata-ps.com
01 Mar 2010
UWR5W_B03
Page 3 of 5
UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
TYPICAL PERFORMANCE CURVES
(T
A
= +25°C)
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.
EFFICIENCY VS. INPUT VOLTAGE AND OUTPUT LOAD
Efficiency vs. Input Voltage
(Full-load conditions. Guaranteed efficiency = 75% at V
IN
= 24V )
81
80
Efficiency (%)
79
78
77
76
75
18
21
24
27
30
33
36
Efficiency (%)
82
80
78
76
74
72
70
0.2
0.4
0.6
Output Current (Amps)
0.8
1.0
Efficiency vs. Output Load
(V
IN
= nominal = 24V. Guaranteed efficiency at full load = 75%)
Input Voltage (Volts)
LINE REGULATION
Output Voltage vs.Input Voltage
(Full-load conditions. Nominal
V
OUT
= 5V)
5.15
Output Voltage (Volts)
5.10
5.05
5.00
4.95
4.90
4.85
18
21
24
27
30
33
36
Input Voltage (Volts)
Output Voltage (Volts)
5.06
5.04
5.02
5.00
4.98
4.96
4.94
0.2
LOAD REGULATION
Output Voltage vs. Output Load
(V
IN
= nominal = 24V. Nominal V
OUT
= 5V)
0.4
0.6
Output Current (Amps)
0.8
1.0
www.murata-ps.com
email: sales@murata-ps.com
01 Mar 2010
UWR5W_B03
Page 4 of 5
UWR Models
Single Output, Miniature, 1" x 1", 5 Watt, DC/DC Converters
CUSTOM CAPABILITIES
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.
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 specifications
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.
UWR-5/1000-D24 Radiated Emissions
FCC Part 15 Class B,
3
Meters
Converter Output = 5Vdc @ 800mA
80
70
60
Radiated Emissions (dBµV/M)
FCC Class B Limit
50
40
30
20
10
0
Radiated Emissions
–10
–20
100
1000
Frequency (MHz)
UWR-5/1000-D24 Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = 5Vdc @ 800mA
80
70
60
Radiated Emissions (dBµV/M)
EN 55022 Class B Limit
50
40
30
20
10
0
–10
Radiated Emissions
–20
100
1000
Frequency (MHz)
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
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. Specifications are subject to change without
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