UWQ-12/17-Q48 Series
www.murata-ps.com
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PRODUCT OVERVIEW
Typical unit
FEATURES
Fixed DC outputs, 12V @17A
Industry standard quarter brick 2.3” x 1.45” x
0.46” open frame package
Wide range 18 to 75 Vdc input voltages with
2250 Volt Basic isolation
Remote ON/Off enable control
The UWQ series offers high output current (up to
17 Amps) in an industry standard “quarter brick”
package requiring no heat sink for most applications. The UWQ series delivers fixed DC output
voltages up to 204 Watts (12V @17A) for printed
circuit board mounting. Wide range inputs of 18
to 75 Volts DC (48 Volts nominal) are ideal for
datacom and telecom systems.
Advanced automated surface mount assembly
and planar magnetics deliver galvanic isolation
rated at 2250 Vdc for basic insulation. To power
digital systems, the outputs offer fast settling to
current steps and tolerance of higher capacitive
loads. Excellent ripple and noise specifications assure compatibility to CPU’s, ASIC’s, programmable
logic and FPGA’s. 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” autorestart 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/
EN/IEC/CSA 60950-1, 2nd edition. It meets RFI/
EMI conducted/radiated emission compliance to
EN55022, CISPR22 with an external filter.
DOSA-compatible pinouts and form factor
High efficiency synchronous rectifier topology
Stable no-load operation
Monotonic startup into pre-bias output condition
Certified to UL/EN 60950-1, CSA-C22.2 No.
60950-1, 2nd edition safety approvals
Extensive self-protection, OVP, input undervoltage, current limiting and thermal shutdown
F1
APPLICATIONS
Embedded systems, datacom and telecom
installations, wireless base stations
Disk farms, data centers and cellular repeater sites
Remote sensor systems, dedicated controllers
Instrumentation systems, R&D platforms, automated test fixtures
Data concentrators, voice forwarding and
speech processing systems
+Vin (1)
+Vout (8)
Barrier
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-12/17-Q48 Series.A07 Page 1 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀
Output
Root Model ➀
UWQ-12/17-Q48 ➂
Input
R/N (mV
IOUT
IIN full
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
17
204
100
120
±1%
±1.5%
48
18-75
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
80
4.62
Efficiency
Dimensions
Min.
Typ.
(inches)
90%
92% 2.30x1.45x0.46 max. 58.4x36.8x11.7
(mm)
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 / 17 - Q48 N B S Lx - C
Family
Series:
Wide Input
Quarter Brick
Nominal Output Voltage
Maximum Rated Output:
Current in Amps
Input Voltage Range:
Q48 = 18-75 Volts (48V nominal)
On/Off Control Logic
N = Negative logic
P = Positive logic
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)*
L2 = 0.145 in. (3.68 mm)*
*Minimum order quantity is required.
Load Share Option
Blank = No share
S = Load share
Baseplate (optional)
Blank = No baseplate, standard
B = Baseplate installed, optional
Samples available with standard pin
length only.
Note:
Some model number combinations may
not be available. See website or contact
your local Murata sales representative.
UWQ-12/17-Q48NBL1-C
Complete Model Number Example:
Negative On/Off logic, baseplate installed, 0.110˝ pin length, RoHS-6 compliance
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MDC_UWQ-12/17-Q48 Series.A07 Page 2 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
FUNCTIONAL SPECIFICATIONS
Conditions ➀
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Full power operation
Operating or non-operating,
100 mS max. duration
Input to output
None, install external fuse
Power on or off, referred to -Vin
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Minimum
18
Typical/Nominal
48
Maximum
80
Vdc
100
Vdc
2250
Vdc
Vdc
Vdc
W
None
0
0
Units
13.5
210
Current-limited, no damage,
0
17
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.
Output Current
Conditions ➀ ➂
INPUT
Operating voltage range
Recommended External Fuse
Start-up threshold, measured at 50% load
Undervoltage shutdown, measured at 50% load
Overvoltage protection
Reverse Polarity Protection
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
Back Ripple Current, No Filtering
Back Ripple Current, with 22μF external
input capacitor
Pre-biased startup
18
Fast blow
Rising input voltage
Falling input voltage
Rising input voltage
None, install external fuse; see technical notes
16.5
15
Vin = nominal
Vin = minimum
Vin = 48V.
Iout = minimum, unit=ON
Measured at input with specified filter
External output voltage < Vset
48
20
17.5
16
None
None
L-C
75
17.9
17
Vdc
A
Vdc
Vdc
Vdc
Vdc
4.52
12.06
0.05
50
80
5
15
500
4.76
12.69
TBD
100
150
6.5
25
525
A
A
A2-Sec.
mA
mA
mA
mA, RMS
mA-p-p
300
400
mA-p-p
Monotonic
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
Vin=48V, full load
Vin=18V
90
90
With or without baseplate
With baseplate
With baseplate
2250
1500
1500
92
92
%
%
Vdc
Vdc
Vdc
basic
100
1500
UL-60950-1, CSA-C22.2 No.60950-1,
IEC/EN60950-1, 2nd edition
Per Telcordia SR-332, issue 1, class 3, ground
fixed, Tambient=+25°C
MΩ
pF
Yes
Hours x 103
TBC
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Time
Startup Time
Dynamic Load Response
Dynamic Load Peak Deviation
160
Power On, to Vout regulation band,
100% resistive load
Remote ON to Vout Regulated
50-75-50% load step to 3% error band
same as above
180
200
KHz
60
65
mS
60
220
±1100
65
275
±1300
mS
μSec
mV
1
1
13.5
2
Vdc
Vdc
mA
13.5
1
2
V
V
mA
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
0
3.5
ON = pin open or external voltage
OFF = ground pin or external voltage
open collector/drain
"B" suffix
3.5
0
1
optional
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MDC_UWQ-12/17-Q48 Series.A07 Page 3 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
FUNCTIONAL SPECIFICATIONS, (CONT.)
Conditions ➀
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
At 50% load, not user adjustable
Via magnetic feedback
97% of Vnom., cold condition
Minimum
Typical/Nominal
Units
204
210
W
11.64
12
12.36
15
Vdc
Vdc
0.0
17
No minimum load
21
17
A
23
A
5
6
A
±0.65
±1.5
% of Vout
% of Vout
19
Hiccup technique, autorecovery within 1.25%
of Vout
Output shorted to ground, no damage
Continuous
Hiccup current limiting
Non-latching
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
Full resistive load, low ESR
Maximum
0.0
100
0
120
mV pk-pk
0.02
5000
% of Vout./°C
μF
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
Inches
mm
Inches
mm
Ounces
Grams
Ounces
Grams
Inches
mm
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
Nickel subplate
Gold overplate
Baseplate Material
μ-inches
μ-inches
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
Radiated, EN55022/CISPR22
RoHS rating
Notes
See derating curves
With baseplate, no derating
Vin = Zero (no power)
Measured in center
External filter is required
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 capacitors 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.
-40
-40
-55
115
125
B
B
RoHS-6
85
110
125
130
°C
°C
°C
°C
Class
Class
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-12/17-Q48 Series.A07 Page 4 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PERFORMANCE DATA, UWQ-12/17-Q48NB-C
94
92
90
88
86
84
82
80
78
76
74
72
70
68
66
64
62
60
Maximum Current Temperature Derating at sea level
(Vin = 24V, air flow from Pin 1 to Pin 4 on PCB, with baseplate)
18
17
16
VIN = 18V
VIN = 24V
VIN = 36V
VIN = 48V
VIN = 60V
VIN = 75V
Output Current (Amps)
Efficiency (%)
Efficiency vs. Line Voltage and Load Current @ +25°C
15
14
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
13
12
11
10
9
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
30
17
35
40
45
18
18
17
17
16
16
15
15
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
12
11
65
70
75
80
85
80
85
80
85
14
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
13
12
11
10
10
9
9
8
8
30
35
40
45
50
55
60
65
70
75
80
85
30
35
40
45
Ambient Temperature (°C)
50
55
60
65
70
75
Ambient Temperature (°C)
Maximum Current Temperature Derating at sea level
(Vin = 60V, air flow from Pin 1 to Pin 4 on PCB, with baseplate)
Maximum Current Temperature Derating at sea level
(Vin = 75V, air flow from Pin 1 to Pin 4 on PCB, with baseplate)
18
18
17
16
16
14
15
Output Current (Amps)
Output Current (Amps)
60
Maximum Current Temperature Derating at sea level
(Vin = 48V, air flow from Pin 1 to Pin 4 on PCB, with baseplate)
Output Current (Amps)
Output Current (Amps)
Maximum Current Temperature Derating at sea level
(Vin = 36V, air flow from Pin 1 to Pin 4 on PCB, with baseplate)
13
55
Ambient Temperature (°C)
Load Current (Amps)
14
50
14
13
12
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
11
10
9
12
10
8
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
6
4
2
8
30
35
40
45
50
55
60
65
Ambient Temperature (°C)
70
75
80
85
30
35
40
45
50
55
60
65
70
75
Ambient Temperature (°C)
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MDC_UWQ-12/17-Q48 Series.A07 Page 5 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PERFORMANCE DATA, UWQ-12/17-Q48NB-C
Maximum Current Temperature Derating at sea level
Vin = 36V (air flow from Pin 1 to Pin 4 on PCB), no baseplate
18
18
17
17
16
16
15
15
Output Current (Amps)
Output Current (Amps)
Maximum Current Temperature Derating at sea level
Vin = 24V (air flow from Pin 1 to Pin 4 on PCB), no baseplate
14
13
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
12
11
10
14
13
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
12
11
10
9
9
8
8
30
35
40
45
50
55
60
65
70
75
80
85
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Ambient Temperature (°C)
Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax, Cload=1μF || 10μF,
Io=10A/div, Ta=+25°C) Ch2=Vout, Ch4=Iout
Maximum Current Temperature Derating at sea level
(Vin = 48V, air flow from Pin 1 to Pin 4 on PCB, no baseplate)
18
17
Output Current (Amps)
16
15
14
13
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
12
11
10
9
8
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
Stepload Transient Response (Vin=48V, Iout=25-75-25% of Imax, Cload=1μF || 10μF,
Io=5A/div, Ta=+25°C) Ch2=Vout, Ch4=Iout
Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax, Cload=5000μF,
Io=5A/div, Ta=+25°C) Ch2=Vout, Ch4=Iout
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MDC_UWQ-12/17-Q48 Series.A07 Page 6 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PERFORMANCE DATA, UWQ-12/17-Q48NB-C
Start-up Delay (Vin=48V, Iout=0A, Cload=0, Ta=+25°C) Ch1= Vin, Ch2= Vout
Start-up Delay (Vin=48V, Iout=17A, Cload=0, Ta=+25°C) Ch1= Vin, Ch2= Vout
Start-up Delay (Vin=48V, Iout=17A, Cload=5000μF, Ta=+25°C) Ch1= Vin, Ch2= Vout
On/Off Enable Delay (Vin=48V, Vout=nom, Iout=0A, Ta=+25°C) Ch1= Enable, Ch2= Vout.
On/Off Enable Delay (Vin=48V, Vout=nom, Iout=17A, Ta=+25°C) Ch1= Enable, Ch2= Vout.
On/Off Enable Delay (Vin=48V, Vout=nom, Iout=17A, Cload=5000μF, Ta=+25°C) Ch1=
Enable, Ch2= Vout.
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MDC_UWQ-12/17-Q48 Series.A07 Page 7 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
PERFORMANCE DATA, UWQ-12/17-Q48NB-C
Output ripple and Noise (Vin=48V, Iout=0A, Cload= 1μF || 10μF, Ta=+25°C, BW=20Mhz)
Output ripple and Noise (Vin=48V, Iout=17A, Cload= 1μF || 10μF, Ta=+25°C, BW=20Mhz)
Thermal image with hot spot at 9.56A 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.
(+Vin)
(+Vo)
(-Vin)
(-Vo)
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MDC_UWQ-12/17-Q48 Series.A07 Page 8 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
MECHANICAL SPECIFICATIONS (OPEN FRAME)
TOP VIEW
END VIEW
END VIEW
58.4
2.30
4.78
0.188*
[11.68]
0.46
36.8
1.45
1° MAX
(ALL PINS)
0.26
0.010
MIN
BOTTOM
CLEARANCE
Mtg Plane
SIDE VIEW
*Alternate pin lengths available (Contact Murata Power Solutions for information).
Pin location dimensions apply at circuit board level.
.062 SHOULDER
(AT 40 MIL PINS)
MATERIAL:
.040 PINS: COPPER ALLOY
.060 PINS: COPPER ALLOY
.083 SHOULDER
(AT 60 MIL PINS)
1.02±0.05
0.040±.002
@ PINS 1-3, 9
FINISH: (ALL PINS)
GOLD (5u"MIN) OVER NICKEL (50u" MIN)
1.52±0.05
0.060±.002
@ PINS 4 & 8
50.80
2.000
REF
50.80
2.000
3.8
0.15
7.61
0.300
CL
3
4
15.24
0.600
2
1
8
BOTTOM VIEW
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
I/O Connections (pin side view)
Pin
1
2
3
Function
+Vin
Remote On/Off Control
-Vin
Pin
4
Function
-Vout
8
+Vout
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
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MDC_UWQ-12/17-Q48 Series.A07 Page 9 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
MECHANICAL SPECIFICATIONS (BASEPLATE)
4x M3x0.5 THREADED HOLE
(.10 MAX SCREW PENETRATION)
TOP VIEW
58.4
2.30
END VIEW
END VIEW
12.7
0.50
47.24
1.860
4.78
0.188*
36.8
1.45
1° MAX
(ALL PINS)
26.16
1.030
0.26
0.010
MIN
BOTTOM
CLEARANCE
Mtg Plane
SIDE VIEW
OPTIONAL
BASEPLATE
'B' OPTION
*Alternate pin lengths available (Contact Murata Power Solutions for information).
Pin location dimensions apply at circuit board level.
.062 SHOULDER
(AT 40 MIL PINS)
MATERIAL:
.040 PINS: COPPER ALLOY
.060 PINS: COPPER ALLOY
.083 SHOULDER
(AT 60 MIL PINS)
1.02±0.05
0.040±.002
@ PINS 1-3, 9
FINISH: (ALL PINS)
GOLD (5u"MIN) OVER NICKEL (50u" MIN)
1.52±0.05
.060±.002
@ PINS 4 & 8
50.80
2.000
REF
3.8
0.15
50.80
2.000
7.61
0.300
3
CL
4
15.24
0.600
2
1
8
BOTTOM VIEW
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
I/O Connections (pin side view)
Pin
1
2
3
Function
+Vin
Remote On/Off Control
-Vin
Pin
4
Function
-Vout
8
+Vout
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
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MDC_UWQ-12/17-Q48 Series.A07 Page 10 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
RECOMMENDED FOOTPRINT
Recommended Footprint
(view through converter)
REF: DOSA Standard Specification
for Quarter-Brick DC/DC Converters
FINISHED HOLE SIZES
@ PINS 1-3
TOP VIEW
(PER IPC-D-275, LEVEL C)
0.048-0.062
CL
(PRI)
(SEC)
1
37.3
1.47
CL
8
7.62
0.300
2
7.62
0.300
4
3
CL
FINISHED HOLE SIZES
@ PINS 4 & 8
0.100 MIN
@ 1-4, 8
FOR PIN
SHOULDERS
(PER IPC-D-275, LEVEL C)
25.4
1.00
0.070-0.084
50.80
2.000
58.9
2.32
It is recommended that no parts be placed beneath converter (hatched area).
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
I/O Connections (pin side view)
Pin
1
2
3
Function
+Vin
Remote On/Off Control
-Vin
Pin
4
Function
-Vout
8
+Vout
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
www.murata-ps.com/support
MDC_UWQ-12/17-Q48 Series.A07 Page 11 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
STANDARD PACKAGING
9.92
(251.97)
REF
9.92
(251.97)
REF
Each static dissipative polyethylene
foam tray accommodates
15 converters in a 3 x 5 array.
0.88 (22.35)
REF
2.75 (69.85) ±.25
closed height
11.00 (279.4) ±.25
10.50 (266.7) ±.25
Carton accommodates two (2) trays yielding 30 converters per carton
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˚
www.murata-ps.com/support
MDC_UWQ-12/17-Q48 Series.A07 Page 12 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
TECHNICAL NOTES
Input Fusing
Certain applications and/or safety agencies may require fuses at the inputs of
power conversion components. Fuses should also be used when there is the
possibility of sustained input voltage reversal which is not current-limited. For
greatest safety, we recommend a fast blow fuse installed in the ungrounded
input supply line.
The installer must observe all relevant safety standards and regulations. For
safety agency approvals, install the converter in compliance with the end-user
safety standard.
Input Reverse-Polarity Protection
If the input voltage polarity is reversed, an internal diode will become forward
biased and likely draw excessive current from the power source. If this source
is not current-limited or the circuit appropriately fused, it could cause permanent damage to the converter.
Input Under-Voltage Shutdown and Start-Up Threshold
Under normal start-up conditions, converters will not begin to regulate properly
until the rising input voltage exceeds and remains at the Start-Up Threshold
Voltage (see Specifications). Once operating, converters will not turn off until
the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent
restart will not occur until the input voltage rises again above the Start-Up
Threshold. This built-in hysteresis prevents any unstable on/off operation at a
single input voltage.
Users should be aware however of input sources near the Under-Voltage Shutdown whose voltage decays as input current is consumed (such as capacitor
inputs), the converter shuts off and then restarts as the external capacitor recharges. Such situations could oscillate. To prevent this, make sure the operating
input voltage is well above the UV Shutdown voltage AT ALL TIMES.
Start-Up Delay
Assuming that the output current is set at the rated maximum, the Vin to Vout StartUp Delay (see Specifications) is the time interval between the point when the rising
input voltage crosses the Start-Up Threshold and the fully loaded regulated output
voltage enters and remains within its specified regulation band. Actual measured
times will vary with input source impedance, external input capacitance, input voltage slew rate and final value of the input voltage as it appears at the converter.
These converters include a soft start circuit to moderate the duty cycle of the
PWM controller at power up, thereby limiting the input inrush current.
The On/Off Remote Control interval from inception to VOUT regulated assumes
that the converter already has its input voltage stabilized above the Start-Up
Threshold before the On command. The interval is measured from the On command until the output enters and remains within its specified regulation band.
The specification assumes that the output is fully loaded at maximum rated
current.
Input Source Impedance
These converters will operate to specifications without external components,
assuming that the source voltage has very low impedance and reasonable input voltage regulation. Since real-world voltage sources have finite impedance,
performance is improved by adding external filter components. Sometimes only
a small ceramic capacitor is sufficient. Since it is difficult to totally characterize
all applications, some experimentation may be needed. Note that external input
capacitors must accept high speed switching currents.
Because of the switching nature of DC/DC converters, the input of these
converters must be driven from a source with both low AC impedance and
adequate DC input regulation. Performance will degrade with increasing input
inductance. Excessive input inductance may inhibit operation. The DC input
regulation specifies that the input voltage, once operating, must never degrade
below the Shut-Down Threshold under all load conditions. Be sure to use
adequate trace sizes and mount components close to the converter.
I/O Filtering, Input Ripple Current and Output Noise
All models in this converter series are tested and specified for input reflected
ripple current and output noise using designated external input/output components, circuits and layout as shown in the figures below. External input capacitors (CIN in the figure) serve primarily as energy storage elements, minimizing
line voltage variations caused by transient IR drops in the input conductors.
Users should select input capacitors for bulk capacitance (at appropriate
frequencies), low ESR and high RMS ripple current ratings. In the figure below,
the CBUS and LBUS components simulate a typical DC voltage bus. Your specific
system configuration may require additional considerations. Please note that the
values of CIN, LBUS and CBUS may vary according to the specific converter model.
TO
OSCILLOSCOPE
CURRENT
PROBE
+VIN
VIN
+
–
+
–
LBUS
CBUS
CIN
−VIN
CIN = 33μF, ESR < 200mΩ @ 100kHz
CBUS = 220μF, 100V
LBUS = 12μH
Figure 2. Measuring Input Ripple Current
In critical applications, output ripple and noise (also referred to as periodic and
random deviations or PARD) may be reduced by adding filter elements such as
multiple external capacitors. Be sure to calculate component temperature rise
from reflected AC current dissipated inside capacitor ESR.
Floating Outputs
Since these are isolated DC/DC converters, their outputs are “floating” with
respect to their input. The essential feature of such isolation is ideal ZERO
CURRENT FLOW between input and output. Real-world converters however do
exhibit tiny leakage currents between input and output (see Specifications).
These leakages consist of both an AC stray capacitance coupling component
and a DC leakage resistance. When using the isolation feature, do not allow
the isolation voltage to exceed specifications. Otherwise the converter may
be damaged. Designers will normally use the negative output (-Output) as
the ground return of the load circuit. You can however use the positive output
(+Output) as the ground return to effectively reverse the output polarity.
www.murata-ps.com/support
MDC_UWQ-12/17-Q48 Series.A07 Page 13 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
CAUTION: If you exceed these Derating guidelines, the converter may have an
unplanned Over Temperature shut down. Also, these graphs are all collected
near Sea Level altitude. Be sure to reduce the derating for higher altitude.
+VOUT
C1
C2
SCOPE
RLOAD
−VOUT
C1 = 1μF
C2 = 10μF
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple and Noise (PARD)
Minimum Output Loading Requirements
These converters employ a synchronous rectifier design topology. All models
regulate within specification and are stable under no load to full load conditions.
Operation under no load might however slightly increase output ripple and noise.
Thermal Shutdown
To protect against thermal over-stress, these converters include thermal shutdown circuitry. If environmental conditions cause the temperature of the DC/
DC’s to rise above the Operating Temperature Range up to the shutdown temperature, an on-board electronic temperature sensor will power down the unit.
When the temperature decreases below the turn-on threshold, the converter
will automatically restart. There is a small amount of hysteresis to prevent
rapid on/off cycling. CAUTION: If you operate too close to the thermal limits, the
converter may shut down suddenly without warning. Be sure to thoroughly test
your application to avoid unplanned thermal shutdown.
Temperature Derating Curves
The graphs in this data sheet illustrate typical operation under a variety of conditions. The Derating curves show the maximum continuous ambient air temperature
and decreasing maximum output current which is acceptable under increasing
forced airflow measured in Linear Feet per Minute (“LFM”). Note that these are
AVERAGE measurements. The converter will accept brief increases in temperature
and/or current or reduced airflow as long as the average is not exceeded.
Note that the temperatures are of the ambient airflow, not the converter itself
which is obviously running at higher temperature than the outside air. Also note
that “natural convection” is defined as very low flow rates which are not using
fan-forced airflow. Depending on the application, “natural convection” is usually about 30-65 LFM but is not equal to still air (0 LFM).
Murata Power Solutions makes Characterization measurements in a closed
cycle wind tunnel with calibrated airflow. We use both thermocouples and an
infrared camera system to observe thermal performance. As a practical matter,
it is quite difficult to insert an anemometer to precisely measure airflow in
most applications. Sometimes it is possible to estimate the effective airflow if
you thoroughly understand the enclosure geometry, entry/exit orifice areas and
the fan flowrate specifications.
Output Overvoltage Protection (OVP)
This converter monitors its output voltage for an over-voltage condition using
an on-board electronic comparator. The signal is optically coupled to the primary side PWM controller. If the output exceeds OVP limits, the sensing circuit
will power down the unit, and the output voltage will decrease. After a time-out
period, the PWM will automatically attempt to restart, causing the output voltage to ramp up to its rated value. It is not necessary to power down and reset
the converter for this automatic OVP-recovery restart.
If the fault condition persists and the output voltage climbs to excessive levels,
the OVP circuitry will initiate another shutdown cycle. This on/off cycling is
referred to as “hiccup” mode.
Output Fusing
The converter is extensively protected against current, voltage and temperature
extremes. However, your application circuit may need additional protection. In the
extremely unlikely event of output circuit failure, excessive voltage could be applied
to your circuit. Consider using an appropriate external protection.
Current Limiting (Power limit with current mode control)
As power demand increases on the output and enters the specified “limit
inception range” (current in voltage mode and power in current mode) limiting
circuitry activates in the DC-DC converter to limit/restrict the maximum current
or total power available. In voltage mode, current limit can have a “constant or
foldback” characteristic. In current mode, once the current reaches a certain
range the output voltage will start to decrease while the output current continues to increase, thereby maintaining constant power, until a maximum peak
current is reached and the converter enters a “hiccup” (on off cycling) mode of
operation until the load is reduced below the threshold level, whereupon it will
return to a normal mode of operation. Current limit inception is defined as the
point where the output voltage has decreased by a pre-specified percentage
(usually a 2% decrease from nominal).
Short Circuit Condition (Current mode control)
The short circuit condition is an extension of the “Current Limiting” condition.
When the monitored peak current signal reaches a certain range, the PWM
controller’s outputs are shut off thereby turning the converter “off.” This is
followed by an extended time out period. This period can vary depending on
other conditions such as the input voltage level. Following this time out period,
the PWM controller will attempt to re-start the converter by initiating a “normal
start cycle” which includes softstart. If the “fault condition” persists, another
“hiccup” cycle is initiated. This “cycle” can and will continue indefinitely until
such time as the “fault condition” is removed, at which time the converter will
resume “normal operation.” Operating in the “hiccup” mode during a fault
condition is advantageous in that average input and output power levels are
held low preventing excessive internal increases in temperature.
www.murata-ps.com/support
MDC_UWQ-12/17-Q48 Series.A07 Page 14 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
Remote On/Off Control
On the input side, a remote On/Off Control can be specified with either positive
or negative logic as follows:
Positive: Models equipped with positive logic are enabled when the On/Off pin
is left open or is pulled high to +13.5VDC with respect to –VIN. An internal bias
current causes the open pin to rise to +VIN. Positive-logic devices are disabled
when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to –VIN.
Negative: Models with negative logic are on (enabled) when the On/Off is
grounded or brought to within a low voltage (see Specifications) with respect to
–VIN. The device is off (disabled) when the On/Off is left open or is pulled high
to +13.5VDC Max. with respect to –VIN.
Dynamic control of the On/Off function should be able to sink the specified
signal current when brought low and withstand specified voltage when brought
high. Be aware too that there is a finite time in milliseconds (see Specifications)
between the time of On/Off Control activation and stable, regulated output. This
time will vary slightly with output load type and current and input conditions.
+VCC
ON/OFF
CONTROL
-VIN
Figure 4. Driving the On/Off Control Pin (suggested circuit)
There are two CAUTIONs for the On/Off Control:
CAUTION: While it is possible to control the On/Off with external logic if you
carefully observe the voltage levels, the preferred circuit is either an open
drain/open collector transistor or a relay (which can thereupon be controlled
by logic). The On/Off prefers to be set at approx. +13.5V (open pin) for the ON
state, assuming positive logic.
CAUTION: Do not apply voltages to the On/Off pin when there is no input power
voltage. Otherwise the converter may be permanently damaged.
www.murata-ps.com/support
MDC_UWQ-12/17-Q48 Series.A07 Page 15 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
Emissions Performance
Murata Power Solutions measures its products for radio frequency emissions
against the EN 55022 and CISPR 22 standards. Passive resistance loads are
employed and the output is set to the maximum voltage. If you set up your
own emissions testing, make sure the output load is rated at continuous power
while doing the tests.
[3] Conducted Emissions Test Results
[[4]
[4
4] La
Layo
yoout R
eeccom
mm
meennddat
atio
ionnss
Layout
Recommendations
The recommended external input and output capacitors (if required) are included. Please refer to the fundamental switching frequency. All of this information
is listed in the Product Specifications. An external discrete filter is installed and
the circuit diagram is shown below.
UWQ EMI 200W Test Card
48Vdc in, 12Vout, 17Amps
Resistive
Load
UUT
V+
Black
C16
C8
C17
C8
C8
C8
L3
C8
C8
C7
Vin +
Vout +
Vin -
Vout -
Resistive
Load
inside a
metal
container
L1
V-
Graph 1. Conducted emissions performance,
CISPR/EN55022, Class B, full load
Most applications can use the filtering which is already installed inside the
converter or with the addition of the recommended external capacitors. For
greater emissions suppression, consider additional filter components and/or
shielding. Emissions performance will depend on the user’s PC board layout,
the chassis shielding environment and choice of external components. Please
refer to Application Note GEAN02 for further discussion.
Figure 5. Conducted Emissions Test Circuit
[1] Conducted Emissions Parts List
Reference
Part Number
L1
L3
C8
PE-62913
500uH,10A, MPS
C7
VZ Series
C16, C17
Description
1mH, 6A
500uH,10A
2.2μFd
Qty 2 - Electrolytic Capacitor
22μFd, 100V
.22μFd
Vendor
Pulse
Murata
Murata
Since many factors affect both the amplitude and spectra of emissions, we
recommend using an engineer who is experienced at emissions suppression.
Panasonic
Unknown
[2] Conducted Emissions Test Equipment Used
Rohde & Schwarz EMI Test Receiver (9KHz – 1000MHz) ESPC
Rohde & Schwarz Software ESPC-1 Ver. 2.20
HP11947A Transient Limiter (Agilent)
OHMITE 25W – Resistor combinations
DC Source Programmable DC Power Supply Model 62012P-100-50
www.murata-ps.com/support
MDC_UWQ-12/17-Q48 Series.A07 Page 16 of 17
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
Vertical Wind Tunnel
IR Transparent
optical window
Variable
speed fan
Unit under
test (UUT)
Murata Power Solutions employs a computer controlled
custom-designed closed loop vertical wind tunnel, infrared
video camera system, and test instrumentation for accurate
airflow and heat dissipation analysis of power products.
The system includes a precision low flow-rate anemometer,
variable speed fan, power supply input and load controls,
temperature gauges, and adjustable heating element.
The IR camera monitors the thermal performance of the
Unit Under Test (UUT) under static steady-state conditions. A
special optical port is used which is transparent to infrared
wavelengths.
IR Video
Camera
Heating
element
Precision
low-rate
anemometer
3” below UUT
Both through-hole and surface mount converters are soldered down to a host carrier board for realistic heat absorption and spreading. Both longitudinal and transverse airflow
studies are possible by rotation of this carrier board since
there are often significant differences in the heat dissipation
in the two airflow directions. The combination of adjustable airflow, adjustable ambient heat, and adjustable Input/
Output currents and voltages mean that a very wide range of
measurement conditions can be studied.
The collimator reduces the amount of turbulence adjacent to
the UUT by minimizing airflow turbulence. Such turbulence
influences the effective heat transfer characteristics and
gives false readings. Excess turbulence removes more heat
from some surfaces and less heat from others, possibly
causing uneven overheating.
Ambient
temperature
sensor
Airflow
collimator
Both sides of the UUT are studied since there are different thermal gradients on each side. The adjustable heating element and
fan, built-in temperature gauges, and no-contact IR camera mean that
power supplies are tested in real-world conditions.
Figure 6. Vertical Wind Tunnel
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 differ; 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:
For Sn/Pb based solders:
Maximum Preheat Temperature
115° C.
Maximum Preheat Temperature
105° C.
Maximum Pot Temperature
270° C.
Maximum Pot Temperature
250° C.
Maximum Solder Dwell Time
7 seconds
Maximum Solder Dwell Time
6 seconds
Murata Power Solutions, Inc.
129 Flanders Road, Westborough, MA 01581 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/
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.
© 2018 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_UWQ-12/17-Q48 Series.A07 Page 17 of 17
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