www.murata-ps.com
UWQ-12/20-T48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PRODUCT OVERVIEW
The UWQ series offers high output current (up to
20 Amps) in an industry standard “quarter brick”
package requiring no heat sink for most applica-
tions. The UWQ series delivers fixed DC output
voltages up to 240 Watts (12V @20A) for printed
circuit board mounting. Wide range inputs of 18
to 60 Volts DC (48 Volts nominal) are ideal for
datacom and telecom systems.
The UWQ-12/20-T48NS/PS offers a load shar-
ing option for paralleling up to three modules in
the most demanding, power hungry applications.
Advanced automated surface mount assembly and
planar magnetics deliver galvanic isolation rated at
2250 Vdc for basic insulation. To power digital sys-
tems, the outputs offer fast settling to current steps
and tolerance of higher capacitive loads. Excellent
ripple and noise specifications assure compatibility
to CPUs, ASICs, programmable logic and FPGAs.
No minimum load is required. For systems needing
controlled startup/shutdown, an external remote
On/Off control may use either positive or negative
logic.
A wealth of self-protection features include
input undervoltage lockout and overtemperature
shutdown using an on-board temperature sensor;
overcurrent protection using the “hiccup” auto-
restart technique, provides indefinite short-circuit
protection, along with output OVP. The synchronous
rectifier topology offers high efficiency for minimal
heat generation and “no heat sink” operation. The
UWQ series is certified to safety standards UL/
IEC/CSA 60950-1, 2nd edition. It meets class B
EMI conducted emission compliance to EN55022,
CISPR22 with an external filter.
Typical unit
FEATURES
DC outputs, 12V @20A
Fixed
Industry standard quarter brick 2.3” x 1.45” x
0.46” open frame package
range 18 to 60 Vdc input voltages with
Wide
2250 Volt Basic isolation
Remote ON/Off enable control
DOSA-compatible pinouts and form factor
efficiency synchronous rectifier topology
High
Multiple-unit parallel operation for increased
current
Stable no-load operation
Monotonic startup into pre-bias output condition
ed to UL/60950-1, CSA-C22.2 No. 60950-
Certifi
1, 2nd edition safety approvals
Extensive self-protection, OVP, input undervolt-
age, current limiting and thermal shutdown
APPLICATIONS
Embedded systems, datacom and telecom
installations, wireless base stations
farms, data centers and cellular repeater sites
Disk
Remote sensor systems, dedicated controllers
Instrumentation systems, R&D platforms, auto-
mated test fixtures
concentrators, voice forwarding and
Data
speech processing systems
F1
+Vin (1)
Barrier
+Vout (8)
External
DC
Power
Source
On/Off
Control
(2)
Controller
and Power
Open = On
Reference and
Error Amplifier
logic)
-Vin (3)
-Vout (4)
Figure 1. Connection Diagram
Typical topology is shown. Murata Power Solutions recommends an external fuse.
For full details go to
www.murata-ps.com/rohs
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MDC_UWQ-12/20-T48 Series.C01.D4
Page 1 of 23
UWQ-12/20-T48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
➀
Output
Input
Efficiency
Min.
90%
90%
Typ.
Dimensions (open frame)
(inches)
(mm)
Iout
Iin full
R/N (mV pk-pk) Regulation (Max.)
➁
Vout (Amps, Power
Vin Nom. Range
Iin no
load
(Volts) max.) (Watts) Typ. Max.
Line
Load
(Volts) (Volts) load (mA) (Amps)
12
12
20
20
240
240
100
100
120
120
±1.0
±1.25
±1.5
±2.5
48
48
18-60
18-60
90
90
5.43
5.43
Root Model
➀
UWQ-12/20-T48
UWQ-12/20-T48-NS/PS
92% 2.30X1.45X0.46 max. 58.4x36.8x11.7
92% 2.30x1.45x0.46 max. 58.4x36.8x11.7
➀
Please refer to the part number structure for additional ordering information and options.
➁
All specifications are typical at nominal line voltage and full load, +25°C unless otherwise noted. See
detailed specifications. Output capacitors are 1 μF || 10 μF with a 22μF input capacitor. These caps are
necessary for our test equipment and may not be needed for your application.
PART NUMBER STRUCTURE
UWQ
-
12
/
20
-
T48 N B S Lx
-
C
Family
Series:
Wide Input
Quarter Brick
Nominal Output Voltage
RoHS Hazardous Materials compliance
C
= RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder), standard
Pin length option
Blank
= Standard pin length 0.180 in. (4.6 mm)
L1
= 0.110 in. (2.79 mm)
➀
L2
= 0.145 in. (3.68 mm)
➀
Maximum Rated Output:
Current in Amps
Input Voltage Range:
T48 = 18-60 Volts (48V nominal)
Load Share Option
Blank
= No share
S
= Load share
On/Off Control Logic
N
= Negative logic
P
= Positive logic
Baseplate (optional)
Blank
= No baseplate, standard
B
= Baseplate installed, optional
➀
Special quantity order is required; samples available with standard pin length only.
➁
Some model number combinations may not be available. See website or contact your local Murata sales representative.
UWQ-12/20-T48NBL1-C
Complete Model Number Example:
Negative On/Off logic, baseplate installed, 0.110˝ pin length, RoHS-6 compliance
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MDC_UWQ-12/20-T48 Series.C01.D4
Page 2 of 23
UWQ-12/20-T48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
FUNCTIONAL SPECIFICATIONS, UWQ-12/20-T48
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
On/Off Remote Control
Output Power
Output Current
Conditions
➀
Full power operation
Operating or non-operating,
100 mS max. duration
Input to output
Power on or off, referred to -Vin
Minimum
18
Typical/Nominal
48
Maximum
70
75
Units
Vdc
Vdc
Vdc
Vdc
W
0
0
2250
13.5
247.2
Current-limited, no damage,
0
20
A
short-circuit protected
Storage Temperature Range
Vin = Zero (no power)
-55
125
°C
Absolute maximums 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 or recommended.
INPUT
Operating voltage range
Recommended External Fuse
Start-up threshold
Undervoltage shutdown
Internal Filter Type
Input current
Full Load Conditions
Low Line
Inrush Transient
Output in Short Circuit
No Load input current
Shut down mode input current
Reflected (back) ripple current
➁
Pre-biased startup
Conditions
➀ ➂
18
Fast blow
Rising input voltage
Falling input voltage
16
14.75
48
20
16.75
15.5
L-C
5.43
14.65
0.05
50
90
5
15
Monotonic
90
89.5
2250
1500
1500
basic
100
1500
UL-60950-1, CSA-C22.2 No.60950-1,
IEC/60950-1, 2nd edition
Per Telcordia SR-332, issue 1, class 3, ground
fixed, Tambient=+25°C
180
Power On, to Vout regulation band
Remote ON to Vout Regulated
50-75-50% load step to 3% error band
same as above
Yes
TBD
200
10
10
200
±1100
220
20
20
250
±1300
Hours x 10
3
KHz
mS
mS
μSec
mV
92
91
60
17.5
16.75
Vdc
A
Vdc
Vdc
Vin = nominal
Vin = minimum
Vin = 48V.
Iout = minimum, unit=ON
Measured at input with specified filter
External output voltage < Vset
Vin=48V, full load
Vin=min
With or without baseplate
With baseplate
With baseplate
5.72
15.34
0.1
100
150
8
25
A
A
A2-Sec.
mA
mA
mA
mA, RMS
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage, input to output
Isolation Voltage, input to baseplate
Isolation Voltage, output to baseplate
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety (certified to the following
requirements)
Calculated MTBF
%
%
Vdc
Vdc
Vdc
MΩ
pF
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
FEATURES and OPTIONS
Remote On/Off Control
➃
“N” suffix:
Negative Logic, ON state
Negative Logic, OFF state
Control Current
“P” suffix:
Positive Logic, ON state
Positive Logic, OFF state
Control Current
Base Plate
ON = pin grounded or external voltage
OFF = pin open or external voltage
open collector/drain
ON = pin open or external voltage
OFF = ground pin or external voltage
open collector/drain
"B" suffix
0
3.5
1
3.5
0
1
optional
1
13.5
2
13.5
1
2
Vdc
Vdc
mA
V
V
mA
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MDC_UWQ-12/20-T48 Series.C01.D4
Page 3 of 23
UWQ-12/20-T48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
FUNCTIONAL SPECIFICATIONS, UWQ-12/20-T48, (CONT.)
OUTPUT
Total Output Power
Voltage
Setting Accuracy, fixed output
Overvoltage Protection
Current
Output Current Range
Minimum Load
Current Limit Inception
Short Circuit
Short Circuit Current
Short Circuit Duration
(remove short for recovery)
Short circuit protection method
Regulation
➄
Line Regulation
Load Regulation
Ripple and Noise
➅
Temperature Coefficient
Maximum Capacitive Loading
Conditions
➀
Minimum
0.0
Typical/Nominal
240
12
Maximum
247.2
12.36
15
20
27.5
2
Units
W
Vdc
Vdc
A
A
A
At 50% load, not user adjustable
Via magnetic feedback
11.64
0
96% of Vnom., cold condition
Hiccup technique, autorecovery within 1.25%
of Vout
Output shorted to ground, no damage
Hiccup current limiting
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=nom.
5 Hz- 20 MHz BW, Cout=1μF MLCC paralleled
with 10μF tantalum
At all outputs
Low ESR
23.5
20
No minimum load
25.5
1
Continuous
Non-latching
±1
±1.5
100
0.02
5000
2.3x1.45x0.46 max.
58.4x36.8x11.68
2.3x1.45x0.5
58.4x36.8x12.7
1.6
45
2.24
63.5
0.04 & 0.06
1.016 & 1.52
Copper alloy
50
5
Aluminum
-40
-40
-55
135
85
110
125
150
120
% of Vout
% of Vout
mV pk-pk
% of Vout./°C
μF
Inches
mm
Inches
mm
Ounces
Grams
Ounces
Grams
Inches
mm
μ-inches
μ-inches
MECHANICAL (Through Hole Models)
Outline Dimensions (no baseplate)
(Please refer to outline drawing)
Outline Dimensions (with baseplate)
Weight
LxWxH
No baseplate
No baseplate
With baseplate
With baseplate
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Baseplate Material
Nickel subplate
Gold overplate
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating
See derating curves
With baseplate, no derating
Vin = Zero (no power)
Measured at hotspot
External filter is required
°C
°C
°C
°C
Class
140
B
RoHS-6
Notes
➀
Unless otherwise noted, all specifications apply at Vin = nominal, nominal output voltage and full
output load. General conditions are near sea level altitude, no base plate installed and natural
convection airflow unless otherwise specified. All models are tested and specified with external
parallel 1 μF and 10 μF multi-layer ceramic output capacitors and a 22μF external input capacitor
(see Technical Notes). All capacitors are low-ESR types wired close to the converter. These capaci-
tors are necessary for our test equipment and may not be needed in the user’s application.
➁
Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is
Cin = 33 μF/100V, Cbus = 220μF/100V and Lbus = 12 μH.
➂
All models are stable and regulate to specification under no load.
➃
The Remote On/Off Control is referred to -Vin.
➄
Regulation specifications describe the output voltage changes as the line voltage or load current
is varied from its nominal or midpoint value to either extreme. The load step is ±25% of full load
current.
➅
Output Ripple and Noise is measured with Cout = 1 μF || 10 μF, 20 MHz oscilloscope bandwidth
and full resistive load.
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MDC_UWQ-12/20-T48 Series.C01.D4
Page 4 of 23
UWQ-12/20-T48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PERFORMANCE DATA, UWQ-12/20-T48-C
Efficiency vs. Line Voltage and Load Current @ +25°C
94
92
90
86
84
82
80
78
76
74
72
70
0
20
25
Power Dissipation vs. Load Current @ +25°C
Efficiency (%)
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
V
IN
= 60V
Power Dissipation (Watts)
88
15
V
IN
= 18V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
V
IN
= 60V
10
5
1
2
3
4
5
6
7
8
9
10
1
2
3
4
Load Current (Amps)
5
6
7
Output Load Curre nt (Amps)
8
9
10
Thermal image with hot spot at 10.8A with 25°C ambient temperature. Natural convention is used with no forced airflow. Identifiable and recommended
maximum value to be verified in application. Vin=48V, Q5 max temp=128°C/IPC9592 guidelines.
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MDC_UWQ-12/20-T48 Series.C01.D4
Page 5 of 23
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