Datasheet

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.
Typical Performance Curves (TA = +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.
Effi ciency vs. Output Current and Input Voltage
Output Voltage vs. Input Voltage and Output Current
Output Voltage vs. Output Current and Input Voltage
EFFICIENCY
EMI RADIATED EMISSIONS
LINE REGULATION
LOAD REGULATION
87
84
81
78
75
72
69
66
63
Efficiency (%)
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
5V Output Current (Amps)
V
IN
= 36V
V
IN
= 24V
V
IN = 12V
5.015
5.010
5.005
5.000
4.995
4.990
4.985
4.980
4.975
V
OUT
(Volts)
9 12 15 18 21 24 27 30 33 3
6
VIN (Volts)
I
OUT
= 4A
I
OUT
= 2A
I
OUT
= 1A
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
5V Output Current (Amps)
V
IN
= 36V
V
IN
= 24V
V
IN = 12V
5.015
5.010
5.005
5.000
4.995
4.990
4.985
4.980
4.975
V
OUT
(Volts)
80
70
60
50
40
30
20
10
0
–10
–20
Fre
q
uenc
y
(
MHz
)
100
1000
Radiated Emissions
FCC Class B Limit
UWR-5/4000-D12A Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = 5Vdc @ 3.6A
Radiated Emissions (dBμV/M)
UWR-5/4000-D12A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = +5Vdc @ 3.6A
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)
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.
www.murata-ps.com/support
UWR Series
Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters
MDC_UWR14-20 Series.G01 Page 5 of 6