www.murata-ps.com
UWR Series
Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters
Typical units
FEATURES
cost! Highly reliable!
Low
Proven SMT-on-pcb construction
Designed to meet UL/ EN60950,
BASIC insulation (D48A models)
mark available (48VIN models)
Output voltages: 3.3/5/5.2/12/15 Volts
Ultra-wide input voltage ranges:4.7-7.5V, 9-36V
or 18-75V
Small packages, 2" x 2" x 0.45"
Industry-standard pinouts
isolated, 1500Vdc guaranteed
Fully
Guaranteed efficiencies to 84%
to +100°C operating temperature
–40
cations and customs for OEM’s
Modifi
PRODUCT OVERVIEW
Murata Power Solutions' new A-Series switching DC/DC converters are designed to meet the
demanding long-term-reliability and low-cost requirements of modern telecom, datacom, computer/
networking and industrial-electronics applications. These highly-efficient, rugged devices combine
straightforward circuit topologies, new components, proven SMT-on-pcb construction methods, and
highly repeatable automatic-assembly techniques. The flexibility of the designs and their assembly
methods readily permit minor modifications to optimize performance for specific applications.
The single-output, 14-20 Watt Models of the A-Series deliver both high power densities and
impressive MTBF’s.
Packaged in standard, 2" x 2" x 0.45", shielded metal cases with non-conductive coatings, these
fully isolated (1500Vdc minimum) DC/DC’s offer excellent line/load regulation, full I/O protection,
thermal shutdown, and industry-standard pinouts.
Output voltages include 3.3, 5, 5.2, 12 or 15 Volts. Input voltage ranges are Murata Power Solu-
tions' traditional ultra-wide 9-36V and 18-75V, as well as 4.7-7.5V. Each device provides remote on/
off control and V
OUT
trim capability. All A-Series UWR models are fully EMI characterized and designed
to meet UL1950, CSA 950 and IEC 950 safety.
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.
+V
IN
(1)
+V
OUT
(6)
COMMON
(7)
–V
IN
(2)
ON/OFF
CONTROL
(4)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
+V
OUT
TRIM
(8)
Figure 1. Simplified Schematic
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_UWR14-20 Series.G01
Page 1 of 6
UWR Series
Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters
Performance Specifications and Ordering Guide
➀
Input
Regulation (Max.)
Line
±1.0%
±0.5%
±1.0%
±1.0%
±0.3%
±0.3%
±0.3%
±1.0%
±1.0%
±0.3%
±0.3%
±1.0%
±0.3%
±0.3%
Output
Root Model
➅
UWR-3.3/4250-D5A-C
UWR-3.3/4850-D12A-C
UWR-3.3/4850-D48A-C
UWR-5/3000-D5A-C
UWR-5/4000-D12A-C
UWR-5/4000-D48A-C
UWR-5/4000-D48E-C➄
UWR-5.2/3000-D5A-C
UWR-12/1250-D5A-C
UWR-12/1650-D12A-C
UWR-12/1650-D48A-C
UWR-15/1000-D5A-C
UWR-15/1300-D12A-C
UWR-15/1300-D48A-C
V
OUT
(Volts)
3.3
3.3
3.3
5
5
5
5
5.2
12
12
12
15
15
15
I
OUT
(mA)
4250
4850
4850
3000
4000
4000
4000
3000
1250
1650
1650
1000
1300
1300
R/N (mVp-p)
➁
Typ.
Max.
50
50
50
50
50
50
50
50
75
50
75
75
50
75
100
75
100
100
100
100
100
100
120
100
100
150
100
100
Load
➂
±1.0%
±1.0%
±1.0%
±1.0%
±0.5%
±0.5%
±0.5%
±1.0%
±1.0%
±0.5%
±0.5%
±1.0%
±0.5%
±0.5%
V
IN
Nom.
(Volts)
5
24
48
5
24
48
48
5
5
24
48
5
24
48
Range
(Volts)
4.7-7.5
9-36
18-75
4.7-7.5
9-36
18-75
36-72
4.7-7.5
4.7-7.5
9-36
18-75
4.7-7.5
9-36
18-75
I
IN
➃
(mA)
80/3720
35/852
15/425
80/3800
15/1020
15/496
15/484
80/3900
80/3660
15/982
15/491
80/3660
20/967
10/484
Efficiency
Min.
76%
77%
77.5%
78%
81%
82%
84%
79%
80%
82%
84%
80%
84%
84%
Typ.
77%
79%
78.5%
79%
82%
84%
86%
80%
82%
84%
85%
82%
85%
86%
Package
(Case,
Pinout)
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
➀
Typical at T
A
= +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
These are not complete part numbers. Please see the Part Number Structure.
Part Number Structure
U WR
-
5
/
4000
-
D12 A
-
C
Output Configuration:
U
= Unipolar
Wide Range Input
Nominal Output Voltage:
3.3, 5, 12 or 15 Volts
Maximum Output Current
in mA
RoHS-6 hazardous sub-
stance compliant*
A-Series
High Reliability
Input Voltage Range:
D5
= 4.7-7.5 Volts (5V nominal)
D12
= 9-36 Volts (24V nominal)
D48
= 18-75/36-72 Volts (48V nominal)
*
Contact Murata Power Solutions
for availability.
0.200
(5.08)
0.45
(11.43)
Mechanical Specifications
2.00
(50.80)
METAL CASE
Case C4
INSULATED BASE
0.20 MIN
(5.08)
0.040 ±0.002 DIA.
(1.016 ±0.051)
1.800
(45.72)
0.10
(2.54)
Temperature Derating
20
18
16
E
BB
G
5
6
1
2
7
D
D, E, F
F
C
BB, G
0.400
(10.16)
1.200
(30.48)
3 EQ. SP. @
0.400 (10.16)
2.00
(50.80)
3
4
Output Power (Watts)
14
12
10
8
6
4
2
0
–40
0
8
A
AA
UWR-3.3/4250-D5A
UWR-3.3/4850-D12A
UWR-3.3/4850-D48A
UWR-5/3000-D5A
UWR-5/4000-D12A
UWR-5/4000-D48A
UWR-5/4000-D48E
UWR-5.2/3000-D5A
UWR-12/1250-D5A
UWR-12/1650-D12A
UWR-12/1650-D48A
UWR-15/1000-D5A
UWR-15/1300-D12A
UWR-15/1300-D48A
40
45
F
A
A
E
C
B
G
D
E
C
B
E
C
B
50
55
60
65
70
B
0.100
(2.54)
BOTTOM VIEW
0.40
(10.16)
I/O Connections
Pin
1
2
3
4
5
6
7
8
Function P6
+Input
–Input
Pin not installed
On/Off Control
Pin not installed
+Output
Common
Trim
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
75
80
85
90
95
100
Ambient Temperature (°C)
1. UWR-3.3/4850-D48A (18-75V input, curve A) and UWR-3.3/4850-D12A (9-36V input, curve A)
will derate curve AA if used over the limited input ranges of 20-60V or 10-30V, respectively.
2. "D48A" models (18-75V input ranges) that derate along curve B will derate along curve BB
if used over the more limited input range of 24-60V.
Notes:
For "D5A" and "D12A" models, the
case is connected to pin 2 (–V
IN
).
For "D48A" and "D48E" models, the
case is connected to pin 1 (+V
IN
).
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/support
MDC_UWR14-20 Series.G01
Page 2 of 6
UWR Series
Single Output, High Reliability, 2" x 2", 14-20 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:
D5A Models
D12A Models
D48A/D48E Models
Input Current
Input Filter Type
Overvoltage Shutdown:
D5A Models
D12A Models
D48A and /D48E Models
Reverse-Polarity Protection
On/Off (Sync.) Control
(Pin 4)➁
V
OUT
Accuracy
(50% load)
Temperature Coefficient
Ripple/Noise
(20MHz BW)
Line/Load Regulation
Efficiency
Isolation Voltage
➂
Isolation Capacitance
Current Limiting
Overvoltage Protection
Transient Response
(50% load step)
Switching Frequency
Operating Temperature
(Ambient):
Without Derating
With Derating
Storage Temperature
Flammability
4.7-7.5 Volts (5V nominal)
9-36 Volts (24V nominal)
18-75/36-72 Volts (48V nominal)
See Ordering Guide
Pi (C-type for D5A models)
10 Volts
40 Volts
80 Volts
Yes (Instantaneous, 10A maximum)
TTL high = off, low (or open) = on
Absolute Maximum Ratings
Input Voltage:
"D5A" Models
"D12A" Models
"D48A" and "D48E" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection:
3.3V Outputs
5V/5.2V Outputs
12V Outputs
15V Outputs
Output Current
11 Volts
44 Volts
88 Volts
Current must be <10A. Brief
duration only. Fusing recommended.
No protection
6.8 Volts, limited duration
15 Volts, limited duration
18 Volts, limited duration
Current limited. Max. current and
short-circuit duration are model
dependent
–40 to +105°C
See soldering guidelines
Output
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc guaranteed
550pF
Auto-recovery
Zener/transorb clamp, magnetic feedback
Storage Temperature
Lead Temperature
These are stress ratings. Exposure of devices in excess 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.
TECHNICAL NOTES
Dynamic Characteristics
200µsec max. to ±1.5% of final value
165kHz (±15kHz)
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
Users may ground either the Common (pin 7) for normal usage or the posi-
tive side (+Output, pin 6) to effectively reverse the output polarity.
Filtering and Noise Reduction
All A-Series UWR 14-20 Watt DC/DC Converters achieve their rated ripple
and noise specifications without the use of external input/output capaci-
tors. In critical applications, input/output 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 below. In many applications, using values greater than
those listed will yield better results.
To Reduce Input Ripple
D5A Models
D12A Models
D48A Models
To Reduce Output Ripple
3.3V Outputs
5V/5.2V Outputs
12/15V Outputs
Environmental
–40 to +40/50/55/65°C (Model dependent)
to +100°C (See Derating Curves)
-40 to +105°C
UL94V-0
Physical
Dimensions
Shielding
Case Connection:
D5A, D12A Models
D48A, D48E Models
Case Material
2" x 2" x 0.45" (51 x 51 x 11.4mm)
5-sided
Pin 2 (–V
IN
)
Pin 1 (+V
IN
)
Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel finish and plastic baseplate
RoHS: Gold-plated copper alloy
Non-RoHS: Tin over copper alloy
2.7 ounces (76.5 grams)
Pin Material
Weight
47µF, 16V
20µF, 50V
20-50µF, 100V
100µF, 6V, Low ESR
47µF, 10V, Low ESR
22µF, 20V, Low ESR
➀
These 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
Applying a voltage to the Control pin when no input power is applied to the converter can
cause permanent damage to the converter. TTL Logic High of +3.3V to +5V max will disable
the converter.
➂
"D48A" models have BASIC, all other models have Functional insulation. Devices can be
screened or modified for higher guaranteed isolation voltages. Contact Murata Power Solu-
tions Applications Engineering for details.
www.murata-ps.com/support
MDC_UWR14-20 Series.G01
Page 3 of 6
UWR Series
Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters
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 14-20 Watt DC/DC Converters, you should use
slow-blow type fuses
with values no greater than the following:
V
IN
Range
D5A
D12A
D48A/D48E
On/Off Control
The On/Off Control pin (pin 4) may be used for remote on/off operation. A
TTL logic high (+2 to +5 Volts, 250µA max.) applied to pin 4 disables the
converter. A TTL logic low (0 to +0.8 Volts, 70µA max.), or no connection,
enables the converter. Control voltages should be referenced to pin 2
(–Input). Applying a voltage to the Control pin when no input power is
applied to the converter can cause permanent damage to the converter.
Output Trimming
V
OUT
may be trimmed up +5% only via a single external trimpot or fixed
resistor. The trimpot should be connected as shown in Figure 2a with its
wiper connected to pin 8 (Trim). A trimpot can be used to determine the
value of a single fixed resistor which should be connected as shown in
Figure 2b. Connect the resistor between pins 8 and 7 (Common) to trim
"up" the output voltage. Fixed resistors should be metal-film types with
absolute TCR’s less than 100ppm/°C to ensure stability.
+VOUT
1
+VIN
TRIM
2
–VIN
COMMON
7
8
LOAD
Trim Up
6
Fuse Value
6A
4A
2A
+VOUT
1
+VIN
TRIM
2
–VIN
COMMON
6
8
20kΩ
5-10
TURNS
LOAD
7
Figure 2a. Trim Connections Using a Trimpot
Custom Capabilities
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.
More importantly . . . 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 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.
Figure 2b. Trim Connections Using Fixed Resistors
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these
converters. These specifications vary depending on the solder type. Exceeding these
specifications may cause damage to the product. Your production environment may dif-
fer; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products
(THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
For Sn/Pb based solders:
Maximum Preheat Temperature
Maximum Pot Temperature
Maximum Solder Dwell Time
105° C.
250° C.
6 seconds
115° C.
270° C.
7 seconds
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MDC_UWR14-20 Series.G01
Page 4 of 6
UWR Series
Single Output, High Reliability, 2" x 2", 14-20 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-5/4000-D12A). Since all devices in the 14-20W
UWR A-Series have the same circuit topology, the performance curves are
representative of all devices.
EFFICIENCY
Efficiency vs. Output Current and Input Voltage
87
84
81
Efficiency (%)
78
V
IN
= 12V
75
V
IN
= 24V
72
V
IN
=
36V
69
Radiated Emissions (dBμV/M)
80
70
60
FCC Class B Limit
EMI RADIATED EMISSIONS
If you’re designing with EMC in mind, please note that all of Murata Power
Solutions' UWR 14-20 Watt A-Series DC/DC Converters have been charac-
terized 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 emissions
plots to FCC and CISPR 22 for model UWR-5/4000-D12A appear below.
UWR-5/4000-D12A Radiated Emissions
FCC Part 15 Class B,
3
Meters
Converter Output = 5Vdc @
3.6A
66
63
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
5V Output Current (Amps)
50
40
30
20
10
0
Radiated Emissions
LINE REGULATION
Output Voltage vs. Input Voltage and Output Current
5.015
I
OUT
= 1A
5.010
5.005
V
OUT
(Volts)
5.000
I
OUT
= 2A
4.995
4.990
4.985
I
OUT
= 4A
4.980
4.975
9
12
15
18
21
24
27
30
33
36
V
IN
(Volts)
–10
–20
100
1000
Frequency (MHz)
UWR-5/4000-D12A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = +5Vdc @
3.6A
80
70
60
Radiated Emissions (dBμV/M)
50
EN 55022 Class B Limit
40
30
20
10
0
LOAD REGULATION
Output Voltage vs. Output Current and Input Voltage
5.015
V
IN
= 12V
5.010
5.005
V
OUT
(Volts)
5.000
4.995
4.990
V
IN
=
36V
4.985
4.980
4.975
0.5
V
IN
= 24V
Radiated Emissions
–10
–20
100
1000
Frequency (MHz)
Quality and Reliability
The A-Series are the first DC/DC Converters to emerge from Murata Power
Solutions' new, company-wide approach to designing and manufacturing
the most reliable power converters available. The five-pronged program
draws our Quality Assurance function into all aspects of new-product
design, development, characterization, qualification and manufacturing.
1.0
1.5
2.0
2.5
3.0
3.5
4.0
5V Output Current (Amps)
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MDC_UWR14-20 Series.G01
Page 5 of 6
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