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UWQ-12-Q48T-C

型号：

UWQ-12-Q48T-C

描述：

宽电压输入，隔离DOSA 1/4砖DC-DC与修剪和检测转换器[ Wide Input, Isolated DOSA Quarter Brick DC-DC Converters with Trim and Sense ]

品牌：

MURATA[ muRata ]

页数：

17 页

PDF大小：

895 K

下载PDF手册
UWQ-12/17-Q48T-C Series  
s
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
PRODUCT OVERVIEW  
The UWQ-12/17-Q48T 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-12/17-Q48T is  
trimmable from 10.8Vout to 13.2Vout and includes  
noise specifications deliver stable 12V BUS for  
IBC applications. For systems needing controlled  
startup/shutdown, an external remote On/Off con-  
trol may use either positive or negative logic.  
Several self-protection features include input un-  
Typ
ical units  
output sense pins to compensate for output voltage dervoltage lockout, output overvoltage protection,  
inaccuracy delivered at the load. The UWQ-12/17-  
Q48T 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 wireless base sta-  
tions, datacom, and telecom systems.  
Advanced automated surface mount assembly,  
thermal management technology, and planar  
magnetics deliver high reliability galvanic isolation  
rated at 2250 Vdc for basic insulation. To power  
digital systems, the output delivers fast settling to  
current steps and stable operation where higher  
capacitive loads are required. Excellent ripple and  
and overtemperature shutdown (using an on-board  
temperature sensor); overcurrent protection us-  
ing the “hiccup” autorestart technique provides  
indefinite short-circuit protection. The synchronous  
rectifier topology along with advanced thermal  
management delivers high efficiency for minimal  
heat generation and “no heat sink” operation.  
The UWQ-12/17-Q48T series is certified to  
safety standards UL/EN/IEC/CSA 60950-1, 2nd  
edition. It meets Class B EMI conducted emission  
compliance to EN55022, CISPR22 with an external  
filter.  
FEATURES  
  
Fixed DC
output, 12V @17A (204W)  
  
Industry standard quarter brick 2.3˝ x 1.45˝ x  
0.46˝ (58.4 x 36.8 x 11.7mm) package without  
baseplate (0.5˝ [12.7mm] with baseplate)  
  
Wide range Vin 18 to 75 Vdc  
  
Trimmable 10.8Vout to 13.2Vout @ 210W max.  
  
2250 Volt Basic isolation  
  
Remote ON/Off enable control  
  
DOSA-compatible pinouts, with trim and sense  
  
High efficiency synchronous rectifier topology  
  
Stable no-load operation  
APPLICATIONS  
  
Wireless base stations embedded systems,  
  
Monotonic startup into pre-bias output condition  
  
Instrumentation systems, R&D platforms, auto-  
mated test fixtures  
  
Certified to UL/EN 60950-1, CSA-C22.2 No.  
60950-1, 2nd edition safety approvals  
datacom and telecom installations  
  
  
Disk farms, data centers and cellular repeater sites  
Data concentrators, voice forwarding and  
speech processing systems  
  
Extensive self-protection, OVP, input undervolt-  
age, current limiting and thermal shutdown  
  
Remote sensor systems  
F1  
+Vin (1)  
+Vout (8)  
Barrier  
External  
DC  
Power  
Source  
On/Off  
Control  
(2)  
Controller  
and Power  
Open = On  
Reference and  
Error Amplifier  
Trim (6)  
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  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 1 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
ORDERING GUIDE ➀  
Output  
Input  
R/N (mV  
pk-pk) Regulation (Max.) ➁  
IOUT  
IIN full  
load  
Efficiency  
Dimensions  
(inches)  
90ꢀ 92ꢀ 2.30x1.45x0.46 max. 58.4x36.8x11.7  
VOUT (Amps, Power  
VIN Nom. Range  
IIN no  
(Volts) max.) (Watts) Typ. Max.  
Line  
Load  
(Volts) (Volts) load (mA) (Amps) Min. Typ.  
(mm)  
Root Model ➀  
UWQ-12/17-Q48T-C ➁ 12 17 204 100 120  
0.25ꢀ  
0.3ꢀ  
48 18-75 80 4.62  
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 / 17 Q48 N T B 9 Lx - C  
-
RoHS Hazardous Materials compliance  
C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder), standard  
Family  
Series:  
Wide Input  
Quarter Brick  
Pin length option  
Blank = standard pin length 0.188 in. (4.78 mm)  
L1 = 0.110 in. (2.79 mm)*  
L2 = 0.145 in. (3.68 mm)*  
Nominal Output Voltage  
*Special quantity order is required;  
no sample quantities available.  
Maximum Rated Output :  
Current in Amps  
Baseplate Connect Pin 9 (special order)*  
Blank = No pin 9, standard  
Note:  
9 = Pin 9 installed, connects to baseplate  
Some model number combinations  
may not be available. Please contact  
Murata Power Solutions.  
Input Voltage Range:  
Q48 = 18-75 Volts (48V nominal)  
Baseplate Option  
Blank = No baseplate, standard  
B = Baseplate installed, optional  
On/Off Control Logic  
N = Negative logic  
P = Positive logic  
Trim & Sense  
**If Trim & Sense pins are not  
T = Trim & Sense pins included**  
required, please click here for the UWQ  
series (UWQ-12/17-Q48) data sheet, or  
contact Murata Power Solutions.  
UWQ Pin 9 Baseplate Connection  
The UWQ module has an additional pin 9 on special order that connects to the baseplate but is  
electrically isolated from the rest of the converter. Please refer to the mechanical drawings.  
Pin 9 offers a positive method of controlling the electrical potential of the baseplate, indepen-  
dent of the converter.  
The baseplate may be ordered by adding a “B” to the model number tree and pin 9 will be pre-  
installed by adding a “9.” The two options are separate. Please refer to the Ordering Guide. Do  
not order pin 9 without the baseplate. Note that “pin 9” converters may be on limited forecast,  
requiring minimum order quantities and scheduled deliveries.  
UWQ-12/17-Q48NTBL1-C  
Complete Model Number Example:  
Negative On/Off logic, trim & sense included, baseplate installed, 0.110˝ pin length, RoHS-6 compliance  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 2 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
FUNCTIONAL SPECIFICATIONS  
ABSOLUTE MAXIMUM RATINGS  
Input Voltage, Continuous  
Minimum  
18  
Typical/Nominal  
Maximum  
80  
Units  
Vdc  
Conditions/Comments ➀  
Full power operation  
48  
Operating or non-operating,  
100 mS max. duration  
Input Voltage, Transient  
100  
Vdc  
Isolation Voltage  
On/Off Remote Control  
Output Power  
Input to output  
Power on or off, referred to -Vin  
2250  
13.5  
210.12  
Vdc  
Vdc  
W
0
0
Current-limited, no damage,  
short-circuit protected  
Vin = Zero (no power)  
Output Current  
0
17  
A
Storage Temperature Range  
-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  
Conditions/Comments ➀ ➂  
Operating voltage range  
Recommended External Fuse  
Start-up threshold, measured at 50% load  
Undervoltage shutdown, measured at 50% load  
Overvoltage protection  
Internal Filter Type  
18  
48  
20  
17.5  
16  
75  
Vdc  
A
Vdc  
Vdc  
Fast blow  
Rising input voltage  
Falling input voltage  
N/A  
16.5  
15  
17.9  
17  
L-C  
Input current  
Full Load Conditions  
Low Line  
Inrush Transient  
Short Circuit Input Current  
No Load input current  
Shut down mode input current  
Vin = nominal  
Vin = minimum  
Vin = 48V.  
4.52  
12.06  
0.05  
50  
80  
5
4.76  
12.69  
0.1  
100  
150  
6.5  
A
A
A2-Sec.  
mA  
mA  
Iout = minimum, unit=ON  
mA  
Measured at input with specified filter  
15  
500  
25  
525  
mA, RMS  
mA-p-p  
Reflected (back) ripple current ➁  
Back Ripple Current, No Filtering  
Back Ripple Current, with 22μf external  
input capacitor  
300  
400  
mA-p-p  
GENERAL and SAFETY  
Efficiency  
Vin=48V, full load  
90  
92  
ꢀ
Isolation  
Isolation Voltage, input to output  
Isolation Voltage, input to baseplate  
Isolation Voltage, output to baseplate  
Insulation Safety Rating  
Isolation Resistance  
With or without baseplate  
With baseplate  
With baseplate  
Basic  
2250  
1500  
1500  
Vdc  
Vdc  
Vdc  
100  
1500  
MΩ  
pF  
Isolation Capacitance  
Safety (certified to the following  
requirements)  
UL-60950-1, CSA-C22.2 No.60950-1,  
IEC/EN60950-1, 2nd edition  
Yes  
Per Telcordia SR-332, issue 1, class 3, ground  
fixed, Tambient=+25°C  
Calculated MTBF  
TBC  
Hours x 103  
DYNAMIC CHARACTERISTICS  
Fixed Switching Frequency  
250  
275  
60  
300  
65  
KHz  
mS  
Power On, to Vout regulation band,  
100ꢀ resistive load  
Startup Time  
Startup Time  
Remote ON to Vout Regulated  
50-75-50ꢀ load step to 3ꢀ of Vout  
same as above  
60  
220  
500  
65  
275  
700  
mS  
μSec  
mV  
Dynamic Load Response  
Dynamic Load Peak Deviation  
FEATURES and OPTIONS  
Remote On/Off Control ➃  
“N” suffix:  
Negative Logic, ON state  
ON = Pin connected to -Vin or to external source  
OFF = Pin open or connected to external voltage  
source  
0
1
13.5  
2
Vdc  
Vdc  
mA  
Negative Logic, OFF state  
3.5  
Control Current  
“P” suffix:  
Open collector/drain  
1
1
ON = Pin open or connected to external voltage  
Positive Logic, ON state  
Positive Logic, OFF state  
3.5  
0
13.5  
V
source  
OFF = Pin connected to -Vin or to external  
voltage  
1
2
V
Control Current  
Base Plate  
Open collector/drain  
"B" suffix  
mA  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 3 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
FUNCTIONAL SPECIFICATIONS, (CONT.)  
OUTPUT  
Total Output Power  
Conditions/Comments ➀  
Minimum  
0.0  
Typical/Nominal  
Maximum  
210  
Units  
W
204  
Voltage  
Setting Accuracy, fixed output  
Output Voltage Range  
Overvoltage Protection  
Current  
At 50ꢀ load, not user adjustable  
User-adjustable  
11.64  
-10  
12  
12.36  
+10  
15  
Vdc  
ꢀ of Vnom.  
Vdc  
Via magnetic feedback  
Output Current Range  
Minimum Load  
Current Limit Inception  
Short Circuit  
0.0  
17  
17  
A
A
No minimum load  
97ꢀ of Vnom., cold condition  
17.5  
19.5  
21.5  
Hiccup technique, autorecovery within 1.25ꢀ  
of Vout  
Short Circuit Current  
5
6
A
Short Circuit Duration  
(remove short for recovery)  
Output shorted to -Vout, no damage.  
Continuous operation  
Short circuit protection method  
Hiccup technique-auto recovery  
Regulation ➄  
Line Regulation  
Load Regulation  
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  
0.25  
0.3  
ꢀ of Vout  
ꢀ of Vout  
100  
120  
mV pk-pk  
Ripple and Noise ➅  
Temperature Coefficient  
Maximum Capacitive Loading  
Remote Sense Compliance  
At all outputs  
Low ESR caps  
Sense connected at load  
0.02  
5000  
ꢀ of Vout./°C  
ꢁF  
ꢀ of Vout  
0
10  
MECHANICAL (Through Hole Models)  
Outline Dimensions (open frame)  
2.3x1.45x0.46  
58.4x36.8x11.7  
2.3x1.45x0.5  
58.4x36.8x12.7  
2.12  
Inches  
mm  
Inches  
mm  
Ounces  
Grams  
Ounces  
Grams  
Inches  
mm  
Outline Dimensions (with baseplate)  
Weight  
With baseplate  
With baseplate  
Without baseplate  
Without baseplate  
60.19  
1.6  
45.36  
Through Hole Pin Diameter  
0.04 & 0.06  
1.016 & 1.52  
Through Hole Pin Material  
TH Pin Plating Metal and Thickness  
Copper alloy  
Nickel subplate  
Gold overplate  
Aluminum  
50  
5
μ-inches  
μ-inches  
Baseplate Material  
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 in center  
External filter is required  
Class B with external filter  
RoHS-6  
-40  
-40  
-55  
115  
85  
°C  
°C  
°C  
°C  
110  
125  
130  
125  
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 ꢁF and 10 ꢁF multi-layer 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.  
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 25ꢀ of full load  
current.  
➅ Output Ripple and Noise is measured with Cout = 1μF paralleled with 10μF, 20 MHz oscilloscope  
bandwidth and full resistive load.  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 4 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
TYPICAL PERFORMANCE DATA  
Efficiency vs. Line Voltage and Load Current @ 25°C  
Power Dissipation @ 25°C  
30  
25  
20  
15  
10  
5
95  
90  
VIN = 18V  
VIN = 24V  
VIN = 36V  
VIN = 48V  
VIN = 60V  
VIN = 75V  
VIN = 18V  
VIN = 24V  
VIN = 36V  
VIN = 48V  
VIN = 60V  
85  
80  
75  
70  
65  
VIN = 75V  
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17  
Amps  
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17  
Load Current (Amps)  
Maximum Current Temperature Derating at Sea Level  
(Vin= 24V, airflow from pin 1 to pin 3, with baseplate)  
Maximum Current Temperature Derating at Sea Level  
(Vin= 36V, airflow from pin 1 to pin 3, with baseplate)  
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
Natural Convection  
0.5 m/s (100 LFM)  
1.0 m/s (200 LFM)  
1.5 m/s (300 LFM)  
2.0 m/s (400 LFM)  
Natural Convection  
0.5 m/s (100 LFM)  
1.0 m/s (200 LFM)  
1.5 m/s (300 LFM)  
2.0 m/s (400 LFM)  
8
7
6
5
8
4
3
7
2
6
1
0
5
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)  
Maximum Current Temperature Derating at Sea Level  
(Vin= 48V, airflow from pin 1 to pin 3, with baseplate)  
Maximum Current Temperature Derating at Sea Level  
(Vin= 60V, airflow from pin 1 to pin 3, with baseplate)  
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
Natural Convection  
0.5 m/s (100 LFM)  
1.0 m/s (200 LFM)  
1.5 m/s (300 LFM)  
2.0 m/s (400 LFM)  
Natural Convection  
0.5 m/s (100 LFM)  
1.0 m/s (200 LFM)  
1.5 m/s (300 LFM)  
2.0 m/s (400 LFM)  
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
0
0
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)  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 5 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
TYPICAL PERFORMANCE DATA  
Maximum Current Temperature Derating at Sea Level  
(Vin= 24V, airflow from pin 1 to pin 3, without baseplate)  
Maximum Current Temperature Derating at Sea Level  
(Vin= 36V, airflow from pin 1 to pin 3, without baseplate)  
18  
17  
16  
15  
14  
13  
12  
11  
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
Natural Convection  
0.5 m/s (100 LFM)  
1.0 m/s (200 LFM)  
1.5 m/s (300 LFM)  
2.0 m/s (400 LFM)  
8
Natural Convection  
0.5 m/s (100 LFM)  
1.0 m/s (200 LFM)  
1.5 m/s (300 LFM)  
7
10  
6
9
5
8
4
3
7
6
5
2.0 m/s (400 LFM)  
2
1
0
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)  
Maximum Current Temperature Derating at Sea Level  
(Vin= 48V, airflow from pin 1 to pin 3, without baseplate)  
Maximum Current Temperature Derating at Sea Level  
(Vin= 60V, airflow from pin 1 to pin 3, without baseplate)  
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
8
8
Natural Convection  
0.5 m/s (100 LFM)  
1.0 m/s (200 LFM)  
1.5 m/s (300 LFM)  
2.0 m/s (400 LFM)  
7
7
Natural Convection  
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
6
5
5
4
4
3
3
2
2
1
1
0
0
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)  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 6 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
TYPICAL PERFORMANCE DATA  
Start-up Delay (Vin=48V, Iout=17A, Ta=+25°C) Ch1=Vin, Ch2=Vout  
Start-up Delay (Vin=48V, Iout=0A, Cload=5000μF, 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=17A, Ta=+25°C)  
Ch1=Enable, Ch2= Vout  
On/Off Enable delay (Vin=48V, Vout=nom, Iout=0A, Cload=6000μF,  
Ta=+25°C) Ch1=Enable, Ch2= Vout  
On/Off Enable delay (Vin=48V, Vout=nom, Iout=17A, Cload=6000μF,  
Ta=+25°C) Ch1=Enable, Ch2= Vout  
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MDC_UWQ-12-17-Q48T-C.A01 Page 7 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
TYPICAL PERFORMANCE DATA  
Stepload Transient Response (Vin=48V, Iout=50-75-50% 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=6000μF, Io=5A/div, Ta=+25°C) Ch2=Vout, Ch4=Iout  
Output Ripple & Noise (Vin=48V, Iout=0A, Cload=1μF || 10μF,  
Ta=+25°C, BW=20MHz)  
Output Ripple & Noise (Vin=48V, Iout=17A, Cload=1μF || 10μF,  
Ta=+25°C, BW=20MHz)  
Pre-biased Output Voltage Startup Operation (Vin=48Vdc, Iout=0A, Cout=5000uF,  
Ta=+25°C) Ch1=Vin, Ch2=Vout.  
Thermal image with hot spot at 9.22A with 25°C ambient temperature. Natural  
convection is used with no forced airflow. Identifiable and recommended maximum  
value to be verified in application.  
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MDC_UWQ-12-17-Q48T-C.A01 Page 8 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
MECHANICAL SPECIFICATIONS – OPEN FRAME  
TOP VIEW  
END VIEW  
58.4  
2.30  
11.7  
.46  
END VIEW  
4.78  
.188  
(NOTE 1)  
36.8  
1.45  
1° MAX  
(ALL PINS)  
0.25  
.010  
MIN  
BOTTOM  
CLEARANCE  
Mtg Plane  
SIDE VIEW  
.062 SHOULDER  
(AT 40 MIL PINS)  
MATERIAL:  
.040 PINS: COPPER ALLOY  
1.57±0.05  
.062±.002  
@PINS 4 & 8  
.062 PINS: COPPER ALLOY  
1.02±0.05  
.040±.002  
@PINS 1-3, 9  
FINISH: (ALL PINS)  
GOLD (5u"MIN) OVER NICKEL (50u" MIN)  
2.000  
REF  
3.8  
.15  
50.80  
2.000  
7.62  
.300  
3.81  
.150  
3
4
5
6
C
L
7.62  
.300  
2
7
8
1
3.81  
.150  
3.81  
.150  
BOTTOM VIEW  
(PIN SIDE)  
1. ALTERNATE PIN LENGTHS AVAILABLE  
(SEE PART NUMBER STRUCTURE)  
2. COMPONENTS SHOWN ARE FOR REF ONLY  
3. DIMENSIONS ARE IN INCHES [mm]  
4. PIN LOCATION DIMENSIONS APPLY AT  
CIRCUIT BOARD LEVEL  
5. THESE CONVERTERS MEET THE MECHANICAL  
SPECIFICATIONS OF A QUARTER BRICK DC-DC  
CONVERTER  
INPUT/OUTPUT CONNECTIONS  
Pin  
1
Function  
+Vin  
Dimensions are in inches (mm shown for ref. only).  
2
3
Remote On/Off *  
-Vin  
Third Angle Projection  
4
-Vout  
5
6
-Sense  
Trim  
7
8
9
+Sense  
+Vout  
No pin  
Tolerances (unless otherwise specified):  
.XX 0.02 (0.5)  
.XXX 0.010 (0.25)  
Angles 2ꢂ  
*The Remote On/Off can be provided  
with either positive (P suffix) or  
negative (N suffix) logic.  
Components are shown for reference only  
and may vary between units.  
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MDC_UWQ-12-17-Q48T-C.A01 Page 9 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
MECHANICAL SPECIFICATIONS – WITH BASEPLATE  
TOP VIEW  
END VIEW  
58.4  
2.30  
12.2  
0.48  
END VIEW  
47.24  
1.860  
4.78  
0.188  
36.8  
26.16  
1.030  
1° MAX  
1.45  
M3x0.5 x 0.10 MAX  
PENETRATION (x4)  
(ALL PINS)  
0.25  
0.010  
MIN  
BOTTOM  
CLEARANCE  
Mtg Plane  
SIDE VIEW  
0.062 SHOULDER  
(AT 40 MIL PINS)  
1.57±0.05  
0.062±0.002  
@PINS 4 & 8  
MATERIAL:  
1.02±0.05  
0.040±0.002  
@PINS 1-3, 9  
0.040 PINS: COPPER ALLOY  
0.062 PINS: COPPER ALLOY  
FINISH: (ALL PINS)  
GOLD (5u"MIN) OVER NICKEL (50u" MIN)  
2.000  
REF  
OPTIONAL PIN #9  
3.8  
0.15  
50.80  
2.000  
CONNECTS TO BASEPLATE  
AND IS ELECTRICALLY ISOLATED  
FROM CONVERTER.  
7.62  
3.81  
0.300  
0.150  
3
9
4
5
6
C
2
1
L
7.62  
0.300  
7
8
3.81  
0.150  
3.81  
BOTTOM VIEW  
(PIN SIDE)  
1. ALTERNATE PIN LENGTHS AVAILABLE  
(SEE PART NUMBER STRUCTURE)  
2. COMPONENTS SHOWN ARE FOR REF ONLY  
3. DIMENSIONS ARE IN INCHES [mm]  
4. PIN LOCATION DIMENSIONS APPLY AT  
CIRCUIT BOARD LEVEL  
5. THESE CONVERTERS MEET THE MECHANICAL  
SPECIFICATIONS OF A QUARTER BRICK DC-DC  
CONVERTER  
0.150  
INPUT/OUTPUT CONNECTIONS  
Pin  
1
Function  
+Vin  
Dimensions are in inches (mm shown for ref. only).  
2
3
Remote On/Off *  
-Vin  
Third Angle Projection  
4
-Vout  
5
-Sense  
6
Trim  
7
8
9
+Sense  
+Vout  
Baseplate (Optional)  
Tolerances (unless otherwise specified):  
.XX 0.02 (0.5)  
.XXX 0.010 (0.25)  
Angles 2ꢂ  
*The Remote On/Off can be provided  
with either positive (P suffix) or  
negative (N suffix) logic.  
Components are shown for reference only  
and may vary between units.  
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MDC_UWQ-12-17-Q48T-C.A01 Page 10 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
MECHANICAL SPECIFICATIONS  
RECOMMENDED FOOTPRINT  
(VIEW THROUGH CONVERTER)  
REF: DOSA STANDARD SPECIFICATION  
FOR QUARTER BRICK DC/DC CONVERTERS  
FINISHED HOLE SIZES  
@ 1-3, 5-7, 9  
(PER IPC-D-275, LEVEL C)  
0.048-0.062  
TOP VIEW  
C
(PRI)  
(SEC)  
L
3.81  
0.150  
7.62  
0.300  
1
2
8
7
37.3  
1.47  
C
C
L
L
6
5
4
9 (When Applicable)  
3.81  
0.150  
7.62  
0.300  
3
FINISHED HOLE SIZES  
0.100 MIN  
@ 1-3, 5-7, 9  
FOR PIN  
25.4  
1.00  
@ PINS 4 & 8  
(PER IPC-D-275, LEVEL C)  
0.070-0.084  
50.80  
2.000  
SHOULDERS  
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  
Tolerances (unless otherwise specified):  
.XX 0.02 (0.5)  
.XXX 0.010 (0.25)  
Angles 2ꢂ  
Components are shown for reference only  
and may vary between units.  
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MDC_UWQ-12-17-Q48T-C.A01 Page 11 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
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  
10.50 (266.7) .25  
11.00 (279.4) .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 2ꢂ  
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MDC_UWQ-12-17-Q48T-C.A01 Page 12 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
Threshold under all load conditions. Be sure to use adequate trace sizes and  
mount components close to the converter.  
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 +Vin supply  
line.  
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 compo-  
nents, circuits and layout as shown in the figures below. External input capaci-  
tors (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 fre-  
quencies), low ESR and high RMS ripple current ratings. In the figure below, the  
CBUS and LBUS components simulate a typical DC voltage bus. Specific system  
configurations may require additional considerations. Please note that the val-  
ues of CIN, LBUS and CBUS may vary according to the specific converter model.  
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 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 above 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 opera-  
tion at a single input voltage.  
TO  
CURRENT  
PROBE  
OSCILLOSCOPE  
+VIN  
−VIN  
L
BUS  
+
–
+
VIN  
CBUS  
CIN  
Users should be aware however of input sources near the Under-Voltage Shut-  
down whose voltage decays as input current is consumed (such as capacitor  
inputs), the converter shuts off and then restarts as the external capacitor re-  
charges. Such situations could oscillate. To prevent this, make sure the operating  
input voltage is well above the UV Shutdown voltage AT ALL TIMES.  
–
C
IN = 33μF, ESR < 200mꢃ @ 100kHz  
BUS = 220μF, 100V  
C
LBUS = 12μH  
Start-Up Delay  
Figure 2. Measuring Input Ripple Current  
Assuming that the output current is set at the rated maximum, the Vin to Vout Start-  
Up 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 volt-  
age slew rate and final value of the input voltage as it appears at the converter.  
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. In order to minimize  
circuit errors and standardize tests between units, scope measurements should  
be made using BNC connectors or the probe ground should not exceed one half  
inch and soldered directly to the fixture.  
These converters include a soft start circuit to moderate the duty cycle of the  
PWM controller at power up, thereby limiting the input and output 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 com-  
mand until the output enters and remains within its specified regulation band.  
The specification assumes that the output is fully loaded at maximum rated  
current.  
+VOUT  
RLOAD  
SCOPE  
C1  
C2  
Input Source Impedance  
These converters will operate to specifications without external components,  
assuming that the source voltage has very low impedance. Since real-world  
voltage sources have finite minimum impedance, performance is improved  
by adding external filter components. Sometimes only a small ceramic input  
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.  
−VOUT  
C1 = 1μF  
C2 = 10μF  
LOAD 2-3 INCHES (51-76mm) FROM MODULE  
Figure 3. Measuring Output Ripple and Noise (PARD)  
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  
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MDC_UWQ-12-17-Q48T-C.A01 Page 13 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
Floating Outputs  
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.  
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. 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.  
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 the application circuit. Consider using an appropriate external protection.  
Current Limiting  
As power demand increases on the output and enters the specified “limit  
inception range” limiting circuitry activates in the DC-DC converter to limit/  
restrict the maximum current or total power available. 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 2ꢀ decrease from nominal).  
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 shut-  
down circuitry. If environmental or application conditions cause the tempera-  
ture 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 the product is operated too close  
to the thermal limits, it may shut down suddenly without warning. Be sure to  
thoroughly test your application to avoid unplanned thermal shutdown.  
Short Circuit Condition  
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.  
Temperature Derating Curves  
The graphs in this data sheet illustrate typical operation under a variety of condi-  
tions. 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”) or meters per second  
(M/S). Note that these are AVERAGE, steady state 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 usu-  
ally about 30-65 LFM but is not equal to still air (0 LFM).  
Trimming Output Voltage  
UWQ converters have a trim capability (pin 6) that enables users to adjust the  
output voltage from +10ꢀ to –10ꢀ (refer to the trim equations in the table  
below). Adjustments to the output voltage can be accomplished with a single  
fixed resistor as shown in Figures 4 and 5. A single fixed resistor can increase  
or decrease the output voltage depending on its connection. Resistors should  
be located close to the converter and have TCR’s less than 100ppm/°C to  
minimize sensitivity to changes in temperature. If the trim function is not used,  
leave the trim pin open.  
Murata Power Solutions makes Characterization measurements in a closed  
cycle wind tunnel with calibrated airflow. Both thermocouples and an infrared  
camera system are used to observe thermal performance.  
CAUTION: If these Derating guidelines are exceeded, 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.  
Standard UWQs have a “positive trim” where a single resistor connected from  
the Trim pin (pin 6) to the +Sense (pin 7) will increase the output voltage. A  
resistor connected from the Trim Pin (pin 6) to the –Sense (pin 5) will decrease  
the output voltage.  
Output Overvoltage Protection (OVP)  
This converter monitors its output voltage for an over-voltage condition using  
magnetic feedback circuitry. 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.  
Trim adjustments greater than the specified +10ꢀ/–10ꢀ can have an adverse  
affect on the converter’s performance and are not recommended. Excessive  
voltage differences between VOUT and Sense, in conjunction with trim adjust-  
ment of the output voltage, can cause the overvoltage protection circuitry to  
activate (see Performance Specifications for overvoltage limits).  
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MDC_UWQ-12-17-Q48T-C.A01 Page 14 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
Temperature/power derating is based on maximum output current and voltage  
at the converter’s output pins. Use of the trim and sense functions can cause  
output voltages to increase, thereby increasing output power beyond the UWQ’s  
specified rating, or cause output voltages to climb into the output overvoltage  
region. Therefore:  
Contact and PCB resistance  
losses due to IR drops  
+VOUT  
+
VIN  
IOUT  
+SENSE  
TRIM  
(VOUT at pins) x (IOUT) rated output power  
Sense Current  
ON/OFF  
The Trim pin (pin 6) is a relatively high impedance node that can be susceptible  
to noise pickup when connected to long conductors in noisy environments.  
LOAD  
CONTROL  
Sense Return  
IOUT Return  
Trim Up*  
Trim Down*  
−SENSE  
49.6(V  
O
– 1.226)  
60.45  
–10.2  
–10.2  
R
TUP (kΩ) =  
R
TDOWN (kΩ) =  
–VIN  
-VOUT  
VO  
– 12  
12 – VO  
Contact and PCB resistance  
losses due to IR drops  
*Vo = Desirable output voltage in Volts  
Figure 6. Remote Sense Circuit Configuration  
function is not used for remote regulation, the user should connect +Sense to  
+Vout and –Sense to –Vout at the converter pins.  
+VOUT  
+VIN  
+SENSE  
TRIM  
The remote Sense lines carry very little current. They are also capacitively  
coupled to the output lines and therefore are in the feedback control loop to  
regulate and stabilize the output. As such, they are not low impedance inputs  
and must be treated with care in PC board layouts. Sense lines on the PCB  
should run adjacent to DC signals, preferably Ground. In cables and discrete  
wiring, use twisted pair, shielded tubing or similar techniques.  
ON/OFF  
CONTROL  
LOAD  
RTRIM UP  
–SENSE  
–VOUT  
–VIN  
Any long, distributed wiring and/or significant inductance introduced into the  
Sense control loop can adversely affect overall system stability. If in doubt, test  
your applications by observing the converter’s output transient response during  
step loads. There should not be any appreciable ringing or oscillation. You  
may also adjust the output trim slightly to compensate for voltage loss in any  
external filter elements. Do not exceed maximum power ratings.  
Figure 4. Trim Connections To Increase Output Voltages Using Fixed Resistors  
+VOUT  
+VIN  
+SENSE  
Remote On/Off Control  
On the input side, a remote On/Off Control can be specified with either positive  
or negative logic as follows:  
ON/OFF  
CONTROL  
TRIM  
–SENSE  
–VOUT  
LOAD  
RTRIM DOWN  
Models 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.  
–VIN  
Figure 5. Trim Connections To Decrease Output Voltages Using Fixed Resistors  
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.  
Remote Sense Input  
Use the Sense inputs with caution. Sense is normally connected at the load.  
Sense inputs compensate for output voltage inaccuracy delivered at the load.  
This is done by correcting IR voltage drops along the output wiring and the  
current carrying capacity of PC board etch. This output drop (the difference  
between Sense and Vout when measured at the converter) should not exceed  
0.5V. Consider using heavier wire if this drop is excessive. Sense inputs also  
improve the stability of the converter and load system by optimizing the control  
loop phase margin.  
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.  
Note: The Sense input and power Vout lines are internally connected through  
low value resistors to their respective polarities so that the converter can  
operate without external connection to the Sense. Nevertheless, if the Sense  
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MDC_UWQ-12-17-Q48T-C.A01 Page 15 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
CAUTION: Do not apply voltages to the On/Off pin when there is no input power  
voltage. Otherwise the converter may be permanently damaged.  
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.  
Please observe Sense inputs tolerance to avoid improper operation:  
[Vout(+) −Vout(-)] − [Sense(+) −Sense(-)] ≤ 10% of Vout  
Output overvoltage protection is monitored at the output voltage pin, not the  
Sense pin. Therefore excessive voltage differences between Vout and Sense  
together with trim adjustment of the output can cause the overvoltage protec-  
tion circuit to activate and shut down the output.  
The recommended external input and output capacitors (if required) are includ-  
ed. 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.  
Power derating of the converter is based on the combination of maximum output  
current and the highest output voltage. Therefore the designer must ensure:  
(Vout at pins) x (Iout) ≤ (Max. rated output power)  
UWQ EMI 200W Test Card  
48Vdc in, 12Vout, 17Amps  
Resistive  
Load  
UUT  
V+  
+VCC  
Resistive  
Black  
Vin +  
Vout +  
Load  
inside a  
metal  
C16  
C17  
C8  
C8  
C8  
C7  
C8  
C8  
C8  
L3  
L1  
container  
V-  
ON/OFF  
CONTROL  
Vin -  
Vout -  
-VIN  
Figure 7. Driving the On/Off Control Pin (suggested circuit)  
Figure 8. Conducted Emissions Test Circuit  
[1] Conducted Emissions Parts List  
Reference  
L1  
Part Number  
Description  
1mH, 6A  
Vendor  
PE-62913  
Pulse  
L3  
C8  
500uH,10A, MPS  
500uH,10A  
2.2ufd  
Murata  
Murata  
Qty 2 - Electrolytic Capacitor  
22ufd, 100V  
C7  
VZ Series  
Panasonic  
Unknown  
C16, C17  
.22ufd  
[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  
[3] Layout Recommendations  
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.  
Since many factors affect both the amplitude and spectra of emissions, we  
recommend using an engineer who is experienced at emissions suppression.  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 16 of 17  
UWQ-12/17-Q48T-C Series  
Wide Input, Isolated DOSA Quarter Brick  
DC-DC Converters with Trim and Sense  
Vertical Wind Tunnel  
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.  
IR Transparent  
optical window  
Variable  
speed fan  
Unit under  
test (UUT)  
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  
Both through-hole and surface mount converters are sol-  
dered down to a 10" by 10" host carrier board for realistic  
heat absorption and spreading. Both longitudinal and trans-  
verse 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.  
Heating  
element  
Precision  
low-rate  
anemometer  
3” below UUT  
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 ther-  
mal 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 9. 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 specifica-  
tions 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  
Maximum Solder Dwell Time  
270° C.  
Maximum Pot Temperature  
250° C.  
7 seconds Maximum Solder Dwell Time  
6 seconds  
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.  
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.  
ISO 9001 and 14001 REGISTERED  
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. Specifications are subject to change without  
notice.  
© 2013 Murata Power Solutions, Inc.  
www.murata-ps.com/support  
MDC_UWQ-12-17-Q48T-C.A01 Page 17 of 17  
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