Figure 1. Simplifi ed Schematic
COMMON
+V
OUT
+V
IN
–V
(1)
(2)
(3)
(5)
IN
REFERENCE &
ERROR AMP
OPTO
ISOLATION
PWM
CONTROLLER
FEATURES
Low Cost! Highly reliable!
Proven SMT-on-pcb construction
Designed to meet UL/EN/IEC 60950-1,
CAN/CSA-C22.2 60950-1
Qual tested; HALT tested; EMC tested
Small packages, 2" x 1" x 0.375"
Standard pinouts
5, 5.2, 12 or 15 Volt outputs
Choice of 3 wide-range inputs:
4.7-7.25 Volts
9-18 Volts
18-75 Volts
Fully isolated, 1500Vdc guaranteed
–40 to +100°C operation
5-side metal shielded cases with non-
conductive baseplates
Modifi cations and customs for OEMs
Typical topology is shown
Placing reliability and cost considerations above
all others, Murata Power Solutions' new A-Series DC/
DC Converters combine straightforward circuit topolo-
gies, the newest components, proven SMT-on-pcb
construction, and highly repeatable automatic assem-
bly techniques. Considering the critical low-cost and
long-term-reliability requirements of today’s telecom,
datacom and computer/networking applications, the
A-Series may well be the most cost-effective DC/DC’s
available today.
The single-output, 6-10 Watt Models of the
A-Series deliver both high power densities and
impressive MTBF’s. Their superior durability is
substantiated by a rigorous in-house qualifi cation pro-
gram including HALT (Highly Accelerated Life Testing).
The goal of HALT is not to simulate fi eld conditions but
to expose devices to multiple excessive stresses with
the intention of precipitating any potential electrical,
mechanical or process weaknesses.
Packaged in 2" x 1" x 0.375" shielded metal
cases with non-conductive coatings, these fully
isolated (1500Vdc guaranteed) DC/DC’s offer excellent
line/load regulation, full I/O protection, and industry-
standard pinouts.
Output voltages include 5, 5.2, 12 and 15 Volts.
Input voltage ranges are either 4.7-7.25V ("D5A"
models), 9-18V ("D12A" models) or 18-75V ("D48A"
models). All A-Series UWR models are fully EMI char-
acterized and agency safety approved.
A-Series DC/DC’s are extremely reliable, easy-
to-use, cost-effective power converters. Use them
to improve the reliability of existing equipment or to
develop new systems that exceed design objectives.
PRODUCT OVERVIEW
UWR Series
Single Output, High Reliability, 2" x 1", 6-10 Watt, DC-DC Converters
MDC_UWR6-10W Series.E01 Page 1 of 6
www.murata-ps.com
www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
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˚
Notes:
For "D5A, D12A and D24E" models,
the case is connected to
pin 2 (–VIN).
For "D48A and D48E" models, the case
is connected to pin 1 (+VIN).
Pin
1
2
3
4
5
I/O Connections
Function P11
+Vin
–Vin
+Vout
No Pin
Common
Wide Range Input
Output Confi guration:
U = Unipolar
Nominal Output Voltage:
5, 5.2, 12 or 15 Volts
Maximum Output
Current
in mA
Input Voltage Range:
D5 = 4.7-7.25 Volts (5V nominal)
D12 = 9-18 Volts (12V nominal)
D24 = 18-36 Volts (24V nominal)
D48 = 18-75/36-72 Volts (48V nominal)
5U WR 1800-/D48 A-
A-Series
High Reliability
Output Power (Watts)
Ambient Temperature (°C)
10
9
8
7
6
5
4
3
2
1
0
UWR-5/1600-D5A B
UWR-5/1800-D48A D
UWR-5/2000-D12A C
UWR-5/2000-D24E A
UWR-5/2000-D48E A
UWR-5.2/1500-D5A B
UWR-12/665-D5A B
UWR-12/750-D48A E
UWR-12/830-D12A C
UWR-15/530-D5A B
UWR-15/600-D48A E
UWR-15/665-D12A C
D, E
B
A, C
D
C
E
A
–40 0 40 45 50 55 60 65 70 75 80 85 90 95 100
Performance Specifi cations and Ordering Guide
Output Input
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 10% to 100% load.
➃ Nominal line voltage, no-load/full-load conditions.
➄ See Technical Notes for an explanation of trading off input voltage ranges for higher full-power operating temperature.
➅ Please see the Part Number Structure for complete ordering options.
➀
PART NUMBER STRUCTURE MECHANICAL SPECIFICATIONS
TEMPERATURE DERATING
1
2
3
4
5
METAL CASE
INSULATED BASE
2.00
(50.8)
0.20 MIN
(5.1)
1.00
(25.4) 0.400
(10.16)
0.800
(20.32)
0.800
(20.3)
0.375
(9.5)
0.040 ±0.002 DIA.
(1.016 ±0.051)
BOTTOM VIEW
0.200
(5.08)
0.100
(2.54)
0.10
(2.54)
0.60
(15.24)
Case C2
R/N (mVp-p) ➁ Regulation (Max.) Effi ciency Package
V
OUT * IOUT V
IN Nom. Range IIN ➃ (Case,
Root Model ➅ (Volts) (mA) Typ. Max. Line Load ➂ (Volts) (Volts) (mA) Min. Typ. Pinout)
RoHS-6 hazardous
substance
compliant
Note: Some model number combinations may not be available. Contact Murata
Power Solutions for further information.
C
-
UWR Series
Single Output, High Reliability, 2" x 1", 6-10 Watt, DC-DC Converters
MDC_UWR6-10W Series.E01 Page 2 of 6
www.murata-ps.com/support
UWR-5/1600-D5A-C 5 1600 50 100 ±0.2% ±0.5% 5 4.7-7.25 20/2105 74% 76% C2, P11
UWR-5/2000-D24E-C ➄5 2000 50 75 ±0.2% ±0.5% 24 18-36 10/490 83% 85% C2, P11
UWR-5.2/1500-D5A-C 5.2 1500 50 100 ±0.2% ±0.5% 5 4.7-7.25 20/2053 74% 76% C2, P11
UWR-12/665-D5A-C 12 665 75 100 ±0.2% ±0.5% 5 4.7-7.25 25/2046 75% 78% C2, P11
UWR-12/830-D12A-C 12 830 75 100 ±0.2% ±0.5% 12 9-18 35/988 81% 84% C2, P11
UWR-5/1800-D48A-C 5 1800 75 100 ±0.1% ±0.25% 48 18-75 10/193 81% 83% C2, P11
UWR-5/2000-D12A-C 5 2000 50 75 ±0.2% ±0.5% 12 9-18 15/1029 79.5% 81% C2, P11
UWR-5/2000-D48E-C ➄5 2000 50 75 ±0.2% ±0.5% 48 36-72 10/248 82% 84% C2, P11
UWR-12/750-D48A-C 12 750 75 100 ±0.2% ±0.5% 48 18-75 10/230 81.5% 82.5% C2, P11
UWR-15/530-D5A-C 15 530 50 100 ±0.2% ±0.5% 5 4.7-7.25 40/2065 75% 77% C2, P11
UWR-15/600-D48A-C 15 600 75 100 ±0.2% ±0.5% 48 18-75 10/233 81.5% 84% C2, P11
UWR-15/665-D12A-C 15 665 75 100 ±0.2% ±0.5% 12 9-18 35/978 82% 85% C2, P11
Input Voltage:
D5A Models 10 Volts
D12A Models 22 Volts
D24E Models 44 Volts
D48A and D48E Models 80 Volts
Input Reverse-Polarity Protection Current must be <6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection
5/5.2V 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 model
dependent.
Storage Temperature –40 to +105°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.
Absolute Maximum Ratings
TECHNICAL NOTES
➀ These power converters require a minimum 10% 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.
➁ Application-specifi c input/output fi ltering can be recommended and perhaps added
internally upon request for scheduled, quantity orders. Contact Murata Power Solutions
Applications Engineering for details.
➂ Devices can be screened or modifi ed for higher guaranteed isolation voltages.
Contact Murata Power Solutions Applications Engineering for details.
➃ Except for 3.3V devices which have no protection.
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Input
Input Voltage Range:
D5A Models 4.7-7.25 Volts (5V nominal)
D12A Models 9-18 Volts (12V nominal)
D24E Models 18-36Volts (24V nominal
D48A Models 18-75 Volts (48V nominal)
D48E Models 36-72 Volts (48V nominal)
Input Current See Ordering Guide
Input Filter Type ➁ Pi
Overvoltage Shutdown:
D5A Models None
D12A Models 20 Volts
D24E Models 40 Volts
D48A and D48E Models 76 Volts
Reverse-Polarity Protection Yes (Instantaneous, 6A maximum)
Output
VOUT Accuracy (50% load) ±1%, maximum
Temperature Coeffi cient ±0.02% per °C
Ripple/Noise (20MHz BW) ➁ See Ordering Guide
Line/Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage ➂ 1500Vdc, guaranteed
Isolation Capacitance 250pF
Current Limiting Auto-recovery
Overvoltage Protection ➃ Zener/transorb clamp, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step) 200µsec max. to ±1.5% of fi nal value
Switching Frequency 165kHz (±15kHz)
Flammability UL94V-0
Environmental
Operating Temperature (Ambient):
Without Derating –40 to +60/65/70°C (Model dependent)
With Derating to +100°C (See Derating Curves)
Storage Temperature –40 to +105°C
Physical
Dimensions 2" x 1" x 0.375" (51 x 25 x 9.5mm)
Shielding 5-sided
Case Connection:
D5A, D12A and D24E Models Pin 2 (–VIN)
D48A and D48E Models Pin 1 (+VIN)
Case Material Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel fi nish and plastic baseplate
Pin Material Gold plate over copper alloy
Weight 1.3 ounces (37 grams)
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating."
Designers will usually use the output Common (pin 5) as the ground/return
of the load circuit. You can, however, use the +Output (pin 3) as ground/
return to effectively reverse the output polarity.
Filtering and Noise Reduction
All A-Series UWR 6-10 Watt DC/DC Converters achieve their rated ripple
and noise specifi cations without the use of external input/output capaci-
tors. In critical applications, 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
D5A Models 47µF, 10V
D12A and D24E Models 20µF, 50V
D48A and D48E Models 10µF, 100V
To Reduce Output Ripple
5/5.2V Outputs 47µF, 10V, Low ESR
12/15V Outputs 22µF, 20V, Low ESR
In critical, space-sensitive applications, Murata Power Solutions may be
able to tailor the internal input/output fi ltering of these units to meet your
specifi c requirements.
UWR Series
Single Output, High Reliability, 2" x 1", 6-10 Watt, DC-DC Converters
MDC_UWR6-10W Series.E01 Page 3 of 6
www.murata-ps.com/support
Effi ciency vs. Output Current and Input Voltage
Output Voltage vs. Input Voltage and Output Current Output Voltage vs. Output Current and Input Voltage
LINE REGULATION LOAD REGULATION
Typical Performance Curves (TA = +25°C)
The performance curves below were derived from actual test data for a single model number (UWR-5/1800-D48A).
Since all devices in the 6-10W UWR A-Series have the same circuit topology, the performance curves are representative of all devices.
84
81
78
75
72
69
66
63
60
Efficiency (%)
Out
p
ut Current
(
Am
p
s
)
V
IN
= 72V
V
IN
= 48V
V
IN
= 18V
0.3 0.6 0.9 1.2 1.5 1.80.18
EFFICIENCY
0.3 0.6 0.9 1.2 1.5 1.8
Output Current (Amps)
V
IN
= 72V
V
IN
= 48V
V
IN
= 18V
5.016
5.014
5.012
5.010
5.008
5.006
5.004
5.002
5.000
V
OUT
(Volts)
0.18
5.016
5.014
5.012
5.010
5.008
5.006
5.004
5.002
5.000
V
OUT
(Volts)
18 24 30 36 42 48 54 60 66 72
VIN
(
Volts
)
I
OUT
= 1.8A
I
OUT
= 0.9A
I
OUT
= 0.18A
UWR Series
Single Output, High Reliability, 2" x 1", 6-10 Watt, DC-DC Converters
MDC_UWR6-10W Series.E01 Page 4 of 6
www.murata-ps.com/support
If you’re designing with EMC in mind, please note that all of Murata Power
Solutions' A-Series UWR 6-10 Watt DC/DC Converters have been character-
ized for radiated and conducted emissions in our new EMI/EMC labora-
tory. 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. Radiated emis-
sions plots to FCC and CISPR 22 for model UWR-12/665-D5A appear below.
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 1000
Radiated Emissions
FCC Class B Limit
UWR-12/665-D5A Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = 12Vdc @ 620mA
Radiated Emissions (dBµV/M)
UWR-12/665-D5A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = 12Vdc @ 620mA
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 1000
Radiated Emissions
EN 55022 Class B Limit
Radiated Emissions (dBµV/M)
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For Murata Power
Solutions A-Series UWR 6-10 Watt DC/DC Converters, you should use slow-
blow type fuses with values no greater than the following:
V
IN Range Fuse Value
D5A 3A
D12A and D24E 2A
D48A and D48E 1A
Murata Power Solutions' world-class design, development and manu-
facturing 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
EMI RADIATED EMISSIONS
Quality and Reliability
The A-Series are the fi rst DC/DC Converters to emerge from Murata Power
Solutions' new, company-wide approach to designing and manufacturing
the most reliable power converters available. The fi ve-pronged program
draws our Quality Assurance function into all aspects of new-product
design, development, characterization, qualifi cation and manufacturing.
Design for Reliability
Design for Reliability is woven throughout our multi-phased, new-product-
development process. Design-for-reliability practices are fully documented
and begin early in the new-product development cycle with the following
goals:
1. To work from an approved components/vendors list ensuring the use of
reliable components and the rigorous qualifi cation of new components.
2. To design with safety margins by adhering to a strict set of derating
guidelines and performing theoretical worst-case analyses.
3. To locate potential design weaknesses early in the product-development
cycle by using extensive HALT (Highly Accelerated Life Testing).
4. To prove that early design improvements are effective by employing a
thorough FRACA (Failure Reporting Analysis and Corrective Action) System.
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing these
converters. These specifi cations vary depending on the solder type. Exceeding these
specifi cations may cause damage to the product. Be cautious when there is high atmo-
spheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your
production environment may differ; therefore please thoroughly review these guidelines
with your process engineers.
Wave Solder Operations for through-hole mounted prod-
ucts (THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature 115° C.
Maximum Pot Temperature 270° C.
Maximum Solder Dwell Time 7 seconds
For Sn/Pb based solders:
Maximum Preheat Temperature 105° C.
Maximum Pot Temperature 250° C.
Maximum Solder Dwell Time 6 seconds
UWR Series
Single Output, High Reliability, 2" x 1", 6-10 Watt, DC-DC Converters
MDC_UWR6-10W Series.E01 Page 5 of 6
www.murata-ps.com/support
HALT Testing
The goal of the accelerated-stress techniques used by Murata Power
Solutions is to force device maturity, in a short period of time, by exposing
devices to excessive levels of "every stimulus of potential value." We use
HALT (Highly Accelerated Life Testing) repeatedly during the design and
early manufacturing phases to detect potential electrical and mechanical
design weaknesses that could result in possible future fi eld failures.
During HALT, prototype and pre-production DC/DC converters are sub-
jected to progressively higher stress levels induced by thermal cycling,
rate of temperature change, vibration, power cycling, product-specifi c
stresses (such as dc voltage variation) and combined environments. The
stresses are not meant to simulate fi eld environments but to expose any
weaknesses in a product’s electro/mechanical design and/or assembly
processes. The goal of HALT is to make products fail so that device weak-
nesses can be analyzed and strengthened as appropriate. Applied stresses
are continually stepped up until products eventually fail. After corrective
actions and/or design changes, stresses are stepped up again and the cycle
is repeated until the "fundamental limit of the technology" is determined.
Murata Power Solutions has invested in a Qualmark OVS-1 HALT tester
capable of applying voltage and temperature extremes as well as 6-axis,
linear and rotational, random vibration. A typical HALT profi le (shown above)
consists of thermal cycling (–55 to +125°C, 30°C/minute) and simultane-
ous, gradually increasing, random longitudinal and rotational vibration up
to 20G’s with load cycling and applied-voltage extremes added as desired.
Many devices in Murata Power Solutions' new A-Series could not be made
to fail prior to reaching either the limits of the HALT chamber or some previ-
ously known physical limit of the device.
We also use the HALT chamber and its ability to rapidly cool devices to
verify their "cold-start" capabilities.
Qualifi cation
For each new product, electrical performance is verifi ed via a comprehen-
sive characterization process and long-term reliability is confi rmed via a
rigorous qualifi cation procedure. The qual procedure includes such strenu-
ous tests as thermal shock and 500 hour life. Qual testing is summarized
below.
In-Line Process Controls and Screening
A combination of statistical sampling and 100% inspection techniques
keeps our assembly line under constant control. Parameters such as
solder-paste thickness, component placement, cleanliness, etc. are statisti-
cally sampled, charted and fi ne tuned as necessary. Visual inspections are
performed by trained operators after pick-and-place, soldering and cleaning
operations. Units are 100% electrically tested prior to potting. All devices
are temperature cycled, burned-in, hi-pot tested and fi nal-electrical tested
prior to external visual examination, packing and shipping.
Rapid Response to Problems
Murata Power Solutions employs an outstanding corrective-action system
to immediately address any detected shortcomings in either products or
processes. Whenever our assembly, quality or engineering personnel spot
a product/process problem, or if a product is returned with a potential
defect, we immediately perform a detailed failure analysis and, if necessary,
undertake corrective actions. Over time, this system has helped refi ne our
assembly operation to yield one of the lowest product defect rates in the
industry.
Typical HALT Profi le
Qualifi cation Test Method/Comments
HALT Murata Power Solutions in-house procedure
High Temperature Storage Max. rated temp., 1,000 hours
Thermal Shock 10 cycles, –55 to +125°C
Temperature/Humidity +85°C, 85% humidity, 48 hours
Lead Integrity Murata Power Solutions in-house procedure
Life Test +70°C, 500 hours*
Marking Permanency Murata Power Solutions in-house procedure
End Point Electrical Tests Per product specifi cation
Qualifi cation Testing
* Interim electrical test at 200 hours.
10 20 30 40 50 60 70 80 90
40
20
0
Random Vibration
(
G's
)
Temperature (°C)
Test Time (minutes)
100
80
60
40
20
0
–20
–40
UWR Series
Single Output, High Reliability, 2" x 1", 6-10 Watt, DC-DC Converters
MDC_UWR6-10W Series.E01 Page 6 of 6
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. © 2015 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/
