UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
Output Voltage
(Vdc)
Output Current
(A)
3.3
5
12
15
24
15.0
10.0
4.5
3.3
2.0
Input Voltage Range
(Vdc)
9 to 36
9 to 36
9 to 36
9 to 36
9 to 36
Typical Unit
FEATURES
PRODUCT OVERVIEW
High efficiency, up to 91%
The world of “brick” DC-DC converters has seen
a steady size reduction. The UWS-Q12 series
makes another dramatic size shrink down to a
“sixteenth brick” width (0.9 inches) while still
retaining a high power output and full 2250 Volt
DC I/O isolation. The converter family accepts 9 to
36 Volts DC inputs and delivers fixed regulated
outputs. The UWS converters are ideal for mobile
applications, datacom and telecom applications,
cell phone towers, data centers, server farms and
network repeaters.
The UWS outputs may be trimmed while
delivering fast settling to current step loads and no
adverse effects from higher capacitive loads.
Excellent ripple and noise specifications assure
compatibility to circuits using CPU’s, ASIC’s,
programmable logic and FPGA’s. No minimum load
9-36 Volts DC wide input range
Single output of 3.3, 5, 12, 15 or 24 Volts
Up to 54 Watts total output power
1.30 x 0.90"x0.36" Open-frame package
Industry standard DOSA sixteenth-brick format
and pinout
Small footprint DC-DC converter, ideal for high
current applications
Pre-bias start-up protection
Trimmable outputs: 3.3Vout (±10%), 5Vout,
12Vout, 15Vout and 24Vout (-20%, +10%)
Operating temperature range -40 to +85°C with
derating
Stable no-load operation with no required external components
Certified to UL 60950-1, 2nd Edition, EN60950-1
safety approvals
is required. For systems requiring controlled
startup/shutdown, the external remote On/Off
control may use an open collector switch
transistor.
Many self-protection features on the UWSQ12 series avoid both converter and external
circuit hazards. These include input undervoltage
shutdown and overtemperature shutdown. The
output of these DC-DC converters have current
limit using the “hiccup” autorestart technique
and the outputs may be short-circuited
indefinitely. Additional features include output
overvoltage and reverse conduction elimination.
The synchronous flyback topology yields high
efficiency for minimal heat buildup and “no fan”
operation.
Open-Frame Through-Hole Package
SAFETY FEATURES
Basic insulation
2250Vdc, Input-to-Output isolation
Over-temperature shutdown
Extensive self-protection shut down features
UL 60950-1, 2nd Edition
CAN/CSA-C22.2 NO. 60950-1
EN 60950-1 (Pending)
RoHS compliant
For full details go to
www.murata-ps.com/rohs
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WDC_UWS-Q12 Series.A01.D07 Page 1 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ①②
Output
Root Model
Regulation (Max.) ③
R/N (mV pk-pk)
Typ.
Max.
Line
Load
15.0
49.5
60
75
±0.150%
±0.300%
24
9-36
30
2.30
87.5% 89.5% 1.30 x 0.90 x 0.36
UWS-5/10-Q12
5
10.0
50.0
40
75
±0.125%
±0.125%
24
9-36
25
2.29
89.0% 91.0% 1.30 x 0.90 x 0.36
UWS-12/4.5-Q12
12
4.5
54.0
100
130
±0.125%
±0.125%
24
9-36
30
2.47
89.5% 91.0% 1.30 x 0.90 x 0.36
UWS-15/3-Q12
15
3.3
49.5
110
150
±0.125%
±0.125%
24
9-36
65
2.29
89.5% 91.0% 1.30 x 0.90 x 0.36
UWS-24/2-Q12
24
2.0
48.0
140
240
±0.125%
±0.125%
24
9-36
130
2.20
89.0% 91.0% 1.30 x 0.90 x 0.36
②
Please refer to the Part Number Structure when ordering.
All specifications are at nominal line voltage and full load, +25°C unless
otherwise noted. See detailed specifications. Output capacitors are 1 μF
ceramic multilayer in parallel with 10 μF and a 220 μF 100V capacitor across
the input pins. I/O caps are necessary for our test equipment and may not be
needed for your application.
③
④
Iin, No Load
(mA)
Iin, Full
Load (A)
Package ④
3.3
①
Range
(V)
Efficiency
Vin Nom.
(V)
UWS-3.3/15-Q12
Vout
Iout
Power
(V) (A, Max.) (W)
Input
Min.
Typ.
Case (inches)
Regulation specifications describe output voltage deviations from a
nominal/midpoint value to either extreme (50% load step).
Please see the Mechanical Specifications for the Case Dimensions in [mm].
PART NUMBER STRUCTURE
IR S -- 12
12 / 4.5
- C- C
UWS
4.5 - -Q12
Q12 NP F Lx
RoHS Compliant
Pin Length Option
Blank = Standard pin length 0.180” (4.6mm)
L1 = 0.110” (2.79mm) ①
L2 = 0.145” (3.68mm) ①
Sixteenth Brick Series
Nominal Output Voltage
Volts (Vdc)
Output Current
Amps (A)
On/Off Control Logic
N = Negative
P = Positive
Input Voltage Range
Q12 = 9–36V (24Vdc nominal)
Part Number Examples:
UWS-3.3/15-Q12N-C stands for Sixteenth Brick, 3.3Vout @ 15A, 9-36Vin, Negative Logic, RoHS Compliant.
UWS-12/4.5-Q12P-C stands for Sixteenth Brick, 12Vout @ 4.5A, 9-36Vin, Positive Logic, RoHS Compliant.
NOTES:
①
Special quantity order is required. Samples are only available with the standard pin length.
②
Some model number combinations may not be available. Please see our website or contact your local Murata Sales Representative.
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WDC_UWS-Q12 Series.A01.D07 Page 2 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-3.3/15-Q12
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions [1]
Full temperature range
Operating or non-operating, 100 mS max.
duration
Input to output tested
None, install external fuse
Power on or off, referred to -Vin
Minimum
0
Typical/Nominal
Maximum
36
Units
Vdc
50
Vdc
Isolation Voltage
Vdc
2250
Input Reverse Polarity
None
Vdc
On/Off Remote Control
0
15
Vdc
Output Power
0
50
W
Output Current
Current-limited, no damage, short-circuit protected
0
15
A
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
9
24
36
Vdc
Recommended External Fuse
Fast blow
A
10.0
Start-up threshold
Rising input voltage
7.7
8.3
9.0
Vdc
Undervoltage shutdown [9]
Falling input voltage
6.9
7.3
7.7
Vdc
Overvoltage shutdown
Rising input voltage
None
Vdc
Reverse Polarity Protection [11]
None, install external fuse
None
Vdc
Internal Filter Type
LC
Input Current
Full Load Conditions
Vin = nominal
2.30
2.38
A
Low Line
Vin = minimum, 15A load
6.21
6.42
A
Inrush Transient
0.05
A2-Sec.
Output in Short Circuit
50
100
mA
No Load Input current
Iout = minimum, unit=ON
30
50
mA
Shut-Down mode Input Current (Off, UV, OT)
1
2
mA
Reflected (back) ripple current [2]
Measured at input with specified filter
30
35
mA, pk-pk
Reflected (back) ripple current
No filtering
250
300
mA, pk-pk
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=9V, full load
86.5
88.5
%
Efficiency
Vin=24V, full load
87.5
89.5
%
Isolation
Isolation Voltage, Input to Output
2250
Vdc
Insulation Safety Rating
Basic
Isolation Resistance
MΩ
10
Isolation Capacitance
1000
pF
Certified to UL-60950-1, IEC/EN60950-1, 2nd
Safety
Yes
Edition
Per Telcordia SR-332, Issue 3, Case 3, Ground
Calculated MTBF [3]
11.5
Hours x 106
Benign controlled, Tambient=40°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
225
275
325
kHz
Power Up Startup Time
Power On to Vout regulated
20
mS
On/Off Startup Time
Remote On to Vout regulated
20
mS
50-75-50% load step, settling time to within
Dynamic Load Response
100
200
µSec
1% of Vout
Dynamic Load Peak Deviation
Same as above,
±180
±240
mV
FEATURES and OPTIONS
Remote On/Off Control [4]
"N" suffix
Negative Logic, ON state
ON=Pin grounded or external voltage
-0.1
0.8
Vdc
Negative Logic, OFF state
OFF=Pin open or external voltage
2.5
15
Vdc
Control Current
Open collector/drain, sourcing
1
2
mA
"P" suffix
Positive Logic, ON state
ON=Pin open or external voltage
10
15
Vdc
Positive Logic, OFF state
OFF=Ground pin or external voltage
0
0.7
Vdc
Control Current
Open collector/drain
1
2
mA
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WDC_UWS-Q12 Series.A01.D07 Page 3 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-3.3/15-Q12 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range [6]
Overvoltage Protection [8]
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 [5]
Line Regulation
Load Regulation
Ripple and Noise [7][10]
Temperature Coefficient
Remote Sense Compensation
Maximum Capacitive Load
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
Conditions [1]
See Derating
Minimum
0.0
Typical/Nominal
49.5
Maximum
49.9
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
3.267
3.30
1
3.333
10
5.0
Vdc
% of Vnom.
% of Vnom.
Vdc
Vin=9V-36V
0.0
15.0
A
24.5
A
98% of Vnom., after warmup
-10
4
16.5
No minimum load
22.5
Hiccup technique, autorecovery within 1.0%
of Vout
0.6
Output shorted to ground, no damage
Continuous
A
Current limiting
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=24V
With a 1uF || 10uF output caps
At all outputs
Sense connected at load
Constant resistance mode , low ESR
10
0
10,000
1.30 x 0.90 x 0.36
33.0 x 22.9 x 9.1
0.48
13.6
0.060 & 0.040
1.52 & 1.02
Copper alloy
None
LxWxH
See derating, full power, natural convection
No derating, full power, natural convection
Vin = Zero (no power)
Measured in center
External filter is required
±0.15
±0.30
75
60
0.02
Through Hole Pin Diameter
Through Hole Pin Material
EMI/RFI Shielding
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
4.5
-40
-40
-55
115
125
B
%
%
mV pk-pk
% of Vnom./°C
% of Vout
μF
Inches
mm
Ounces
Grams
Inches
mm
85
105
125
130
°C
°C
°C
°C
Class
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WDC_UWS-Q12 Series.A01.D07 Page 4 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-3.3/15-Q12
UWS-3.3/15-Q12N-C
Efficiency vs. Input Line Voltage and Output Load Current
Efficiency (%)
Power Dissipation (Watts)
UWS-3.3/15-Q12N-C
Power Dissipation vs. Line and Load
Output Load Current (Amps)
UWS-3.3/15-Q12N-C
Temperature Derating
Vin 9V (Airflow from Pin 1 to Pin 3 on PCB)
UWS-3.3/15-Q12N-C
Temperature Derating
Vin 12V (Airflow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
Output Load Current (Amps)
Ambient Temperature in Degrees Celsius
UWS-3.3/15-Q12N-C
Temperature Derating
Vin 24V (Airflow from Pin 1 to Pin 3 on PCB)
UWS-3.3/15-Q12N-C
Temperature Derating
Vin 30V (Airflow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
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WDC_UWS-Q12 Series.A01.D07 Page 5 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-3.3/15-Q12
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=no load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=15A,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=15A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
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WDC_UWS-Q12 Series.A01.D07 Page 6 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-3.3/15-Q12
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=10000µF, Ta=+25°C., ScopeBW=20MHz)
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=15A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Pre-biased output voltage added connecting an external 10000uF to the output
(Vin=24V, Iout=0A, +25°C)
Pre-biased output voltage added connecting an external supply through a diode
(Vin=24V, Iout=0A, +25°C)
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WDC_UWS-Q12 Series.A01.D07 Page 7 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-5/10-Q12
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions [1]
Full temperature range
Operating or non-operating, tested:
100 mS max. duration
Input to output
None, install external fuse
Power on, referred to -Vin
Minimum
0
Typical/Nominal
Maximum
36
Units
Vdc
0
50
Vdc
Isolation Voltage
2250
Vdc
Input Reverse Polarity
None
Vdc
On/Off Remote Control
0
15
Vdc
Output Power
0
50.5
W
Output Current
Current-limited, no damage, short-circuit protected
0
10
A
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
9
24
36
Vdc
Recommended External Fuse
Fast blow
10.0
A
Start-up threshold, turn on
Rising input voltage
7.7
8.3
9.0
Vdc
Undervoltage shutdown, turn off [9]
Falling input voltage
6.9
7.3
7.7
Vdc
Overvoltage shutdown
NA
Vdc
Reverse Polarity Protection [11]
None, install external fuse
None
Vdc
Internal Filter Type
LC
Input Current
Full Load Conditions
Vin = nominal
2.29
2.36
A
Low Line
Vin = minimum
6.21
6.38
A
Inrush Transient
0.05
A2-Sec.
Output in Short Circuit
50
100
mA
No Load Input Current
Iout = minimum, unit=ON
25
75
mA
Shut-Down Mode Input Current
5
10
mA
Reflected (back) ripple current [2]
Measured at input with specified filter
30
35
mAp-p
Reflected (back) ripple current
Measured at input without filter
250
300
mAp-p
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=9V, full load
88.0
89.5
%
Efficiency
Vin=24V, full load
89.0
91.0
%
Isolation
Isolation Voltage, Input to Output
2250
Vdc
Insulation Safety Rating
Basic
Isolation Resistance
100
MΩ
Isolation Capacitance
1000
pF
UL-60950-1, CSA-C22.2 No.60950-1,
Safety (meets the following requirements)
Yes
IEC/EN60950-1, 2nd Edition
Per Telcordia SR-332, Issue 3, Case 3, Ground
Calculated MTBF [3]
10.5
Hours x 106
Benign controlled, Tambient=40°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
225
275
325
kHz
Startup Time
Power On to Vout regulated
30
mS
Startup Time
Remote ON to Vout regulated
30
mS
50-75-50% load step, settling time to within
Dynamic Load Response
100
200
µSec
1% of Vout
Dynamic Load Peak Deviation
Same as above,
±180
±240
mV
FEATURES and OPTIONS
Remote On/Off Control [4]
"N" suffix
Negative Logic, ON state
ON = Pin grounded or external voltage
-0.1
0.8
V
Negative Logic, OFF state
OFF = Pin open or external voltage
2.5
15
V
Control Current
open collector/drain
1
2
mA
"P" suffix
Positive Logic, ON state
ON = Pin open or external voltage
10
15
V
Positive Logic, OFF state
OFF = Ground pin or external voltage
0
0.7
V
Control Current
open collector/drain
1
2
mA
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WDC_UWS-Q12 Series.A01.D07 Page 8 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-5/10-Q12 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range [6]
Overvoltage Protection [8]
Current
Output Current Range
Minimum Load
Current Limit Inception
Short Circuit
Minimum
0.0
Typical/Nominal
50
Maximum
50.50
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
4.95
-1.00
-20
6.5
5
5.05
1.00
10
8.0
Vdc
% of Vset
Vin=9V to 36V
0
98% of Vnom., after warmup
11.50
Hiccup technique, autorecovery within
1% of Vout
Short Circuit Current
Short Circuit Duration
(remove short for recovery)
Short circuit protection method
Regulation [5]
Line Regulation
Load Regulation
Ripple and Noise [7][10]
Temperature Coefficient
Remote Sense Compensation
Maximum Capacitive Loading (10% ceramic,
90% Oscon)
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
Conditions [1]
See Derating
7.0
Vdc
10
No minimum load
14.50
16.0
0.6
A
A
Continuous
Output shorted to ground, no damage
Current limiting
Vin=min. to max., Vout=nom., nom load
Iout=min. to max
With a 1uF || 10 uF output caps.
At all outputs
Sense connected at load
Through Hole Pin Diameter
Constant resistance mode , low ESR
±0.125
±0.125
40
0.02
10
0
LxWxH
Diameter of pins standard
Through Hole Pin Material
TH Pin Plating Metal and Thickness
EMI/RFI Shielding
ENVIRONMENTAL
Operating Ambient Temperature Range
Storage Temperature
Operating Case Temp
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
Nickel subplate
Gold overplate
See derating curves
Vin = Zero (no power)
No derating required
Measured at hotspot
External filter is required
-40
-55
-40
115
75
V
V
mV pk-pk
% of Vout./°C
% of Vout
5000
μF
1.30 x 0.90 x 0.36
33.0 x 22.9 x 9.1
0.48
13.6
0.060 & 0.040
1.52 & 1.02
Gold-plated copper
alloy with nickel
underplate
50
5
None
Inches
mm
Ounces
Grams
Inches
mm
125
B
µ-inches
µ-inches
85
125
105
130
°C
°C
°C
°C
Class
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WDC_UWS-Q12 Series.A01.D07 Page 9 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q12
TYPICAL PERFORMANCE DATA, UWS-5/10-Q12
UWS-5/10-Q12N-C
Power Dissipation vs. Line and Load
Efficiency (%)
Power Dissipation (Watts)
UWS-5/10-Q12N-C
Efficiency vs. Input Line Voltage and Output Load Current
Output Load Current (Amps)
Output Load Current (Amps)
UWS-5/10-Q12N-C
Temperature Derating
Vin 12V (Airflow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
UWS-5/10-Q12N-C
Temperature Derating
Vin 9V (Airflow from Pin 1 to Pin 3 on PCB)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
UWS-5/10-Q12N-C
Temperature Derating
Vin 30V (Airflow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
UWS-5/10-Q12N-C
Temperature Derating
Vin 24V (Airflow from Pin 1 to Pin 3 on PCB)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
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WDC_UWS-Q12 Series.A01.D07 Page 10 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-5/10-Q12
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=no load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=10A, Cload=1µF
ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=10A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
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WDC_UWS-Q12 Series.A01.D07 Page 11 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-5/10-Q12
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=5000µF, Ta=+25°C., ScopeBW=20MHz)
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=10A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Pre-biased output voltage added connecting an external 5000uF to the output
(Vin=24V, Iout=0A, +25°C)
Pre-biased output voltage added connecting an external supply through a diode
(Vin=24V, Iout=0A, +25°C)
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WDC_UWS-Q12 Series.A01.D07 Page 12 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-12/4.5-Q12
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions [1]
Full temperature range
Operating or non-operating, 100 mS max.
duration
Input to output tested
None, install external fuse
Power on or off, referred to -Vin
Minimum
0
Typical/Nominal
Maximum
36
Units
Vdc
0
50
Vdc
Isolation Voltage
2250
Vdc
Input Reverse Polarity
None
Vdc
On/Off Remote Control
0
15
Vdc
Output Power
0
54.54
W
Output Current
Current-limited, no damage, short-circuit protected
0
4.5
A
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
9
24
36
Vdc
Recommended External Fuse
Fast blow
A
10.0
Start-up threshold
Rising input voltage
7.7
8.3
9.0
Vdc
Undervoltage shutdown [9]
Falling input voltage
6.9
7.3
7.7
Vdc
Overvoltage shutdown
Rising input voltage
None
Vdc
Reverse Polarity Protection [11]
None, install external fuse
None
Vdc
Internal Filter Type
LC
Input Current
Full Load Conditions
Vin = nominal
2.47
2.54
A
Low Line
Vin = minimum , 4.5A load
6.59
6.77
A
Inrush Transient
0.05
A2-Sec.
Output in Short Circuit
50
100
mA
No Load Input Current
Iout = minimum, unit=ON
30
75
mA
Shut-Down Mode Input Currrent (Off, UV, OT)
1
2
mA
Reflected (back) ripple current [2]
Measured at input with specified filter
30
35
mA, pk-pk
Reflected (back) ripple current
Measured at input without filter
300
350
mA, pk-pk
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=9V, full load
89.5
91.0
%
Efficiency
Vin=24V, full load
89.5
91.0
%
Isolation
Isolation Voltage, Input to Output
2250
Vdc
Insulation Safety Rating
Basic
Isolation Resistance
100
MΩ
Isolation Capacitance
1000
pF
Safety (Designed to meet the following requireYes
UL-60950-1, IEC/EN60950-1, 2nd Edition
ments)
Per Telcordia SR-332, Issue 3, Case 3, Ground
Calculated MTBF [3]
7.77
Hours x 106
Benign controlled, Tambient=40°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
225
275
325
kHz
Power Up Startup Time
Power On to Vout regulated
30
mS
On/Off Startup Time
Remote ON to Vout regulated
30
mS
50-75-50% load step, settling time to within
Dynamic Load Response
250
300
µSec
±1% of Vout
Dynamic Load Peak Deviation
Same as above,
±350
±400
mV
FEATURES and OPTIONS
Remote On/Off Control [4]
"N" suffix
Negative Logic, ON state
ON=Pin grounded or external voltage
-0.1
0.8
Vdc
Negative Logic, OFF state
OFF=Pin open or external voltage
2.5
15
Vdc
Control Current
Open collector/drain, sourcing
1
2
mA
"P" suffix
Positive Logic, ON state
ON=Pin open or external voltage
10
15
Vdc
Positive Logic, OFF state
OFF=Pin grounded or external voltage
0
0.7
Vdc
Control Current
Open collector/drain, sinking
1
2
mA
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WDC_UWS-Q12 Series.A01.D07 Page 13 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-12/4.5-Q12 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range [6]
Overvoltage Protection [8]
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 [5]
Line Regulation
Load Regulation
Ripple and Noise [7][10]
Temperature Coefficient
Remote Sense Compensation
Maximum Capacitive Load
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
Conditions [1]
See Derating
Minimum
0
Typical/Nominal
54
Maximum
54.54
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
11.88
12
±1
12.12
10
18.0
Vdc
% of Vnom.
% of Vnom.
Vdc
Vin=9V-36V
0
4.5
A
8.25
A
98% of Vnom., after warmup
-20
15.0
5.75
EMI/RFI Shielding
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
No minimum load
7.00
Hiccup technique, autorecovery within ±1.25%
of Vout
0.6
Output shorted to ground, no damage
Continuous
A
Current limiting
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=24V
with a 1uF || 10uF output caps
At all outputs
Sense connected at load
Constant resistance mode , low ESR
0
100
±0.02
10
2200
±0.125
±0.125
130
1.30 x 0.90 x 0.36
33.0 x 22.9 x 9.1
0.48
13.6
0.060 & 0.040
1.52 & 1.02
Copper alloy
50
5
LxWxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
16.5
Nickel subplate
Gold overplate
%
%
mV pk-pk
% of Vnom./°C
% of Vout
μF
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
None
No derating, full power, natural convection
No derating, full power, natural convection
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
115
125
B
85
105
125
130
°C
°C
°C
°C
Class
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WDC_UWS-Q12 Series.A01.D07 Page 14 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q12
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q12
UWS-12/4.5-Q12N-C
Efficiency vs. Input Line Voltage and Output Load Current
Efficiency (%)
Power Dissipation (Watts)
UWS-12/4.5-Q12N-C
Power Dissipation vs. Line and Load
Output Load Current (Amps)
Output Load Current (Amps)
UWS-12/4.5-Q12N-C
Temperature Derating
Vin 12V (Airflow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
UWS-12/4.5-Q12N-C
Temperature Derating
Vin 9V (Airflow from Pin 1 to Pin 3 on PCB)
Ambient Temperature in Degrees Celsius
UWS-12/4.5-Q12N-C
Temperature Derating
Vin 24V (Airflow from Pin 1 to Pin 3 on PCB)
UWS-12/4.5-Q12N-C
Temperature Derating
Vin 30V (Airflow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
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WDC_UWS-Q12 Series.A01.D07 Page 15 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q12
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=no load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=4.5A, Cload=1µF ceramic ||
10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=4.5A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
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WDC_UWS-Q12 Series.A01.D07 Page 16 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q12
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=2000µF, Ta=+25°C., ScopeBW=20MHz)
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=4.5A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Pre-biased output voltage added connecting an external 2000uF to the output
(Vin=24V, Iout=0A, +25°C)
Pre-biased output voltage added connecting an external supply through a diode
(Vin=24V, Iout=0A, +25°C)
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WDC_UWS-Q12 Series.A01.D07 Page 17 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-15/3-Q12
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions [1]
Full temperature range
Operating or non-operating, 100 mS max.
duration
Input to output tested
None, install external fuse
Power on or off, referred to -Vin
Minimum
0
Typical/Nominal
Maximum
36
Units
Vdc
0
50
Vdc
Isolation Voltage
2250
Vdc
Input Reverse Polarity
None
Vdc
On/Off Remote Control
0
15
Vdc
Output Power
0
50
W
Output Current
Current-limited, no damage, short-circuit protected
0
3.3
A
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
9
24
36
Vdc
Recommended External Fuse
Fast blow
A
10.0
Start-up threshold
Rising input voltage
7.7
8.3
9.0
Vdc
Undervoltage shutdown [9]
Falling input voltage
6.9
7.3
7.7
Vdc
Overvoltage shutdown
Rising input voltage
None
Vdc
Reverse Polarity Protection [11]
None, install external fuse
None
Vdc
Internal Filter Type
LC
Input Current
Full Load Conditions
Vin = nominal
2.29
2.33
A
Low Line
Vin = minimum , 3.3A load
6.14
6.24
A
Inrush Transient
0.05
A2-Sec.
Output in Short Circuit
50
100
mA
No Load Input Current
Iout = minimum, unit=ON
65
85
mA
Shut-Down Mode Input Currrent (Off, UV, OT)
1
2
mA
Reflected (back) ripple current [2]
Measured at input with specified filter
30
35
mA, pk-pk
Reflected (back) ripple current
Measured at input without filter
250
300
mA, pk-pk
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=9V, full load
89.0
90.5
%
Efficiency
Vin=24V, full load
89.5
91.0
%
Isolation
Isolation Voltage, Input to Output
2250
Vdc
Insulation Safety Rating
Basic
Isolation Resistance
100
MΩ
Isolation Capacitance
1000
pF
Safety (Designed to meet the following requireYes
UL-60950-1, IEC/EN60950-1, 2nd Edition
ments)
Per Telcordia SR-332, Issue 3, Case 3, Ground
Calculated MTBF [3]
10.9
Hours x 106
Benign controlled, Tambient=40°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
225
275
325
kHz
Power Up Startup Time
Power On to Vout regulated
30
mS
On/Off Startup Time
Remote ON to Vout regulated
30
mS
50-75-50% load step, settling time to within
Dynamic Load Response
250
300
µSec
±1% of Vout
Dynamic Load Peak Deviation
Same as above,
±350
±400
mV
FEATURES and OPTIONS
Remote On/Off Control [4]
"N" suffix
Negative Logic, ON state
ON=Pin grounded or external voltage
-0.1
0.8
Vdc
Negative Logic, OFF state
OFF=Pin open or external voltage
2.5
15
Vdc
Control Current
Open collector/drain, sourcing
1
2
mA
"P" suffix
Positive Logic, ON state
ON=Pin open or external voltage
10
15
Vdc
Positive Logic, OFF state
OFF=Pin grounded or external voltage
0
0.7
Vdc
Control Current
Open collector/drain, sinking
1
2
mA
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WDC_UWS-Q12 Series.A01.D07 Page 18 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-15/3-Q12 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range [6]
Overvoltage Protection [8]
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 [5]
Line Regulation
Load Regulation
Ripple and Noise [7][10]
Temperature Coefficient
Remote Sense Compensation
Maximum Capacitive Load
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
Conditions [1]
See Derating
Minimum
0
Typical/Nominal
49.5
Maximum
50.00
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
14.85
15
±1
15.15
Vdc
% of Vnom.
% of Vnom.
Vdc
Vin=9V-36V
0
98% of Vnom., after warmup
-20
3.80
EMI/RFI Shielding
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
No minimum load
5.50
Hiccup technique, autorecovery within ±1.25%
of Vout
0.6
Output shorted to ground, no damage
Continuous
3.3
A
6.30
A
A
Current limiting
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=24V
with a 1uF || 10uF output caps
At all outputs
Sense connected at load
Constant resistance mode , low ESR
0
115
±0.02
10
2200
±0.125
±0.125
150
1.30 x 0.90 x 0.36
33.0 x 22.9 x 9.1
0.48
13.6
0.060 & 0.040
1.52 & 1.02
Copper alloy
50
5
LxWxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
10
18.5
Nickel subplate
Gold overplate
%
%
mV pk-pk
% of Vnom./°C
% of Vout
μF
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
None
No derating, full power, natural convection
No derating, full power, natural convection
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
115
125
B
85
105
125
130
°C
°C
°C
°C
Class
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WDC_UWS-Q12 Series.A01.D07 Page 19 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-15/3-Q12
UWS-15/3-Q12N-C
Efficiency vs. Input Line Voltage and Output Load Current
Efficiency (%)
Power Dissipation (Watts)
UWS-15/3-Q12N-C
Power Dissipation vs. Line and Load
Output Load Current (Amps)
Output Load Current (Amps)
UWS-15/3-Q12N-C
Temperature Derating
Vin 12V (air flow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
UWS-15/3-Q12N-C
Temperature Derating
Vin 9V (air flow from Pin 1 to Pin 3 on PCB)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
UWS-15/3-Q12N-C
Temperature Derating
Vin 30V (air flow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
UWS-15/3-Q12N-C
Temperature Derating
Vin 24V (air flow from Pin 1 to Pin 3 on PCB)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
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WDC_UWS-Q12 Series.A01.D07 Page 20 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-15/3-Q12
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=no load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=3.3A, Cload=1µF ceramic ||
10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=3.3A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
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WDC_UWS-Q12 Series.A01.D07 Page 21 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-15/3-Q12
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=2000µF, Ta=+25°C., ScopeBW=20MHz)
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=3.3A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Pre-biased output voltage added connecting an external 2000uF to the output
(Vin=24V, Iout=0A, +25°C)
Pre-biased output voltage added connecting an external supply through a diode
(Vin=24V, Iout=0A, +25°C)
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WDC_UWS-Q12 Series.A01.D07 Page 22 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-24/2-Q12
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions [1]
Full temperature range
Operating or non-operating, 100 mS max.
duration
Input to output tested
None, install external fuse
Power on or off, referred to -Vin
Minimum
0
Typical/Nominal
Maximum
36
Units
Vdc
0
50
Vdc
Isolation Voltage
2250
Vdc
Input Reverse Polarity
None
Vdc
On/Off Remote Control
0
15
Vdc
Output Power
0
48.48
W
Output Current
Current-limited, no damage, short-circuit protected
0
2.0
A
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
9
24
36
Vdc
Recommended External Fuse
Fast blow
A
10.0
Start-up threshold
Rising input voltage
7.7
8.3
9.0
Vdc
Undervoltage shutdown [9]
Falling input voltage
6.9
7.3
7.7
Vdc
Overvoltage shutdown
Rising input voltage
None
Vdc
Reverse Polarity Protection [11]
None, install external fuse
None
Vdc
Internal Filter Type
Capacitive
Input Current
Full Load Conditions
Vin = nominal
2.20
2.27
A
Low Line
Vin = minimum , 2A load
5.86
6.05
A
Inrush Transient
0.05
A2-Sec.
0.10
Output in Short Circuit
50
100
mA
No Load Input Current
Iout = minimum, unit=ON
130
150
mA
Shut-Down Mode Input Currrent (Off, UV, OT)
1
2
mA
Reflected (back) ripple current [2]
Measured at input with specified filter
30
35
mA, pk-pk
Reflected (back) ripple current
Measured at input without filter
300
350
mA, pk-pk
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=9V, full load
89
91
%
Efficiency
Vin=24V, full load
89
91
%
Isolation
Isolation Voltage, Input to Output
2250
Vdc
Insulation Safety Rating
Basic
Isolation Resistance
100
MΩ
Isolation Capacitance
1000
pF
Safety (Designed to meet the following requireYes
UL-60950-1, IEC/EN60950-1, 2nd Edition
ments)
Per Telcordia SR-332, Issue 3, Case 3, Ground
Calculated MTBF [3]
11.7
Hours x 106
Benign controlled, Tambient=40°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
225
275
325
kHz
Power Up Startup Time
Power On to Vout regulated
30
mS
On/Off Startup Time
Remote ON to Vout regulated
30
mS
50-75-50% load step, settling time to within
Dynamic Load Response
250
300
µSec
±1% of Vout
Dynamic Load Peak Deviation
Same as above,
±350
±400
mV
FEATURES and OPTIONS
Remote On/Off Control [4]
"N" suffix
Negative Logic, ON state
ON=Pin grounded or external voltage
-0.1
0.8
Vdc
Negative Logic, OFF state
OFF=Pin open or external voltage
2.5
15
Vdc
Control Current
Open collector/drain, sourcing
1
2
mA
"P" suffix
Positive Logic, ON state
ON=Pin open or external voltage
10
15
Vdc
Positive Logic, OFF state
OFF=Pin grounded or external voltage
0
0.7
Vdc
Control Current
Open collector/drain, sinking
1
2
mA
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WDC_UWS-Q12 Series.A01.D07 Page 23 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-24/2-Q12 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range [6]
Overvoltage Protection [8]
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 [5]
Line Regulation
Load Regulation
Ripple and Noise [7][10]
Temperature Coefficient
Remote Sense Compensation
Maximum Capacitive Load
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
Conditions [1]
See Derating
Minimum
0
Typical/Nominal
48
Maximum
48.48
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
23.76
24
±1
24.24
10
31
Vdc
% of Vnom.
% of Vnom.
Vdc
Vin=9V-36V
0
2.0
A
98% of Vnom., after warmup
2.75
4.15
A
-20
29
Hiccup technique, autorecovery within ±1.25%
of Vout
0.6
Output shorted to ground, no damage
Continuous
EMI/RFI Shielding
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
A
Current limiting
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=24V
with a 1uF || 10uF output caps
At all outputs
Sense connected at load
Constant resistance mode , low ESR
0
140
±0.02
10
680
±0.125
±0.125
240
1.30 x 0.90 x 0.36
33.0 x 22.9 x 9.1
0.48
13.6
0.060 & 0.040
1.52 & 1.02
Copper alloy
50
5
LxWxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
2.0
No minimum load
3.45
Nickel subplate
Gold overplate
%
%
mV pk-pk
% of Vnom./°C
% of Vout
μF
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
None
No derating, full power, natural convection
No derating, full power, natural convection
Vin = Zero (no power)
Measured in center
External filter is required
-40
-40
-55
115
125
B
85
105
125
130
°C
°C
°C
°C
Class
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WDC_UWS-Q12 Series.A01.D07 Page 24 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-24/2-Q12
UWS-24/2-Q12N-C
Efficiency vs. Input Line Voltage and Output Load Current
Efficiency (%)
Power Dissipation (Watts)
UWS-24/2-Q12N-C
Power Dissipation vs. Line and Load
Output Load Current (Amps)
Output Load Current (Amps)
UWS-24/2-Q12N-C
Temperature Derating
Vin 12V (air flow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
UWS-24/2-Q12N-C
Temperature Derating
Vin 9V (air flow from Pin 1 to Pin 3 on PCB)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
UWS-24/2-Q12N-C
Temperature Derating
Vin 30V (air flow from Pin 1 to Pin 3 on PCB)
Output Load Current (Amps)
Output Load Current (Amps)
UWS-24/2-Q12N-C
Temperature Derating
Vin 24V (air flow from Pin 1 to Pin 3 on PCB)
Ambient Temperature in Degrees Celsius
Ambient Temperature in Degrees Celsius
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WDC_UWS-Q12 Series.A01.D07 Page 25 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-24/2-Q12
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=no load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
Output Ripple and Noise (Vin=24V, Vout=nom., Iout=2A, Cload=1µF ceramic ||
10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Negative logic, Vin=24V, Vout=nom., Iout=2A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Enable, Trace 2=Vout
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WDC_UWS-Q12 Series.A01.D07 Page 26 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-24/2-Q12
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=1µF ceramic || 10µF tantalum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=24V, Vout=nom., Iout=50-75-50% of full load,
Cload=2000µF, Ta=+25°C., ScopeBW=20MHz)
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=no load, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Power On Startup Delay (Vin=0 to 24V, Vout=nom., Iout=2A, Cload=0 µF,
Ta=+25°C., ScopeBW=20MHz) Trace 1=Vin, Trace 2=Vout
Pre-biased output voltage added connecting an external 680uF to the output
(Vin=24V, Iout=0A, +25°C)
Pre-biased output voltage added connecting an external supply through a diode
(Vin=24V, Iout=0A, +25°C)
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WDC_UWS-Q12 Series.A01.D07 Page 27 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
Performance Specification Notes
1. All specifications are typical unless noted. Ambient temperature =
+25°Celsius, Vin is nominal, output current is maximum rated nominal.
External output capacitance is 1 µF multilayer ceramic paralleled with
10 µF electrolytic and a 220 μF 100V capacitor across the input pins. All
caps are low ESR. These capacitors are necessary for our test equipment
and may not be needed in your application.
Testing must be kept short enough that the converter does not appreciably
heat up during testing. For extended testing, use plenty of airflow. See
Derating Curves for temperature performance. All models are stable and
regulate within spec without external cacacitance.
2. Input Ripple Current is tested and specified over a 5-20 MHz bandwidth
and uses a special set of external filters only for the Ripple Current specifications. Input filtering is Cin = 33 µF, Cbus = 220 µF, Lbus = 12 µH. Use
capacitor rated voltages which are twice the maximum expected voltage.
Capacitors must accept high speed AC switching currents.
3. Mean Time Before Failure (MTBF) is calculated using the Telcordia
(Belcore) SR-332 Issue, Case 3, ground benign controlled conditions.
Operating temperature = +40°C, full output load, natural air convection.
6. Do not exceed maximum power ratings or output overvoltage when adjusting output trim values.
7. At zero output current, Vout may contain components which slightly
exceed the ripple and noise specifications.
8. Output overload protection is non-latching. When the output overload
is removed, the output will automatically recover.
9. The converter will shut off if the input falls below the undervoltage threshold. It will not restart until the input exceeds the Input Start Up Voltage.
10. Output noise may be further reduced by installing an external filter. See
the Application Notes. Use only as much output filtering as needed and no
more. Larger caps (especially low-ESR ceramic types) may slow transient
response or degrade dynamic performance. Thoroughly test your application with all components installed.
11. If reverse polarity is accidentally applied to the input, to ensure reverse
input protection with full output load, always connect an external fast blow
input fuse in series with the +Vin input.
4. The On/Off Control is normally driven from a switch or relay. An open
collector/open drain transistor may be used in saturation and cut-off
(pinch-off) modes. External logic may also be used if voltage levels are
fully compliant to the specifications.
5. Regulation specifications describe the deviation as the input line voltage
or output load current is varied from a nominal midpoint value to either
extreme (50% load).
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WDC_UWS-Q12 Series.A01.D07 Page 28 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
MECHANICAL SPECIFICATIONS, THROUGH-HOLE MOUNT
0.116 (2.95) MAX
PCB thickness
(REF)
Material:
Ø .040 Pins: copper alloy
Ø .060 Pins: copper alloy
Finish: (all pins)
Gold (5u"min) over nickel (50u" min)
END VIEW
0.36
(9.1)
0.18 (4.6)
0.010 (0.25) MIN
CLEARANCE
.040 (1.02) @
PINS 1-3, 5-7
.060 (1.52) @
PINS 4 & 8
SIDE VIEW
PIN
#3
1.30
(33.0)
1.100
(27.94)
4
0.300
(7.62)
CL
0.300
(7.62)
PIN
#4
5
6 0.150(3.81)
2
7
8
1
0.150
(3.81)
0.90 (22.9)
3
PIN
#8
Pin
3
2
BOTTOM PIN VIEW
CL
1
INPUT/OUTPUT CONNECTIONS
Function
Pin
Function
4
–Vin
–Vout
5
–Sense
On/Off Control 6
Output Trim
7
+Sense
+Vin
8
+Vout
Note that some competitive units may use different
pin numbering or alternate outline views. However,
all units are pinout compatible.
Standard pin length is shown. Please refer to the
part number structure for alternate pin lengths.
Recommended Footprint For Thru-hole Converter
(View Through Converter)
Finished Hole Sizes
@ Pins 1-3, 6, 5, 7
(Pri)
(Per Ipc-d-275, Level C)
[ 27.94 ]
.048-.062
(Sec)
1.100
[ 1.22 - 1.57 ]
11.7
.46
23.4
.92
It is recommended that no parts be placed beneath
the converter.
Top View
CL
1
Dimensions are in inches (mm) shown for ref. only.
7.62
.300
7
2
6
7.62
.300
5
3
4
[ 2.54 ]
.100 Min
Annular Ring
For All Pin
Shoulders
3.81
.150
8
CL
33.5
1.32
3.81
.150
Third Angle Projection
CL
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 1˚
Finished Hole Sizes
@ Pins 4 & 8
(Per Ipc-d-275, Level C)
Components are shown for reference only
and may vary between units.
.070-.084
[ 1.78 - 2.13 ]
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WDC_UWS-Q12 Series.A01.D07 Page 29 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT
Anti-static foam
Corner spacer
2 cartons
per box
Each tray is 4 x 8 units
(32 units total per tray)
11.42 (290)
128 units
per carton
Label
MPQ = 128
256 units total per box
All materials in contact with the units are anti-static protective.
Dimensions are in inches (mm).
Corrugated
cardboard box
Label
SHIPPING TRAY DIMENSIONS
Material: Low density, closed cell polyethylene anti-static foam
9.84
(250.00)
0.24
(6.00)
9.84
(250.00)
0.47
(12.00)
4-C 0.26
(6.5)
0.87
(22.00)
0.59
(15.00)
Dimensions are in milimeters.
Tolerances (unless otherwise specified):
.XX ± 0.5
.XXX ± 0.25
Angles ± 2˚
1.34
(34.00)
1.97
(50.00)
0.31
(8.00)
0.51
(13.00)
0.91
(23.00)
Third Angle Projection
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WDC_UWS-Q12 Series.A01.D07 Page 30 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TECHNICAL NOTES
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exists. For Murata Power Solutions UWS series DC-DC converters, we
recommend the use of a fast blow fuse, installed in the ungrounded input supply
line with a typical value about twice the maximum input current, calculated at
low line with the converter’s minimum efficiency.
All relevant national and international safety standards and regulations must
be observed by the installer. For system safety agency approvals, the converters
must be installed in compliance with the requirements of the end use safety
standard, i.e. IEC/EN/UL60950-1.
Input Reverse-Polarity Protection
If the input voltage polarity is accidentally 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, devices will not begin to regulate properly
until the ramping-up input voltage exceeds the Start-Up Threshold Voltage.
Once operating, devices will not turn off until the input voltage drops below the
Under-Voltage Shutdown limit. Subsequent re-start will not occur until the input
is brought back up to the Start-Up Threshold. This built in hysteresis prevents
any unstable on/off situations from occurring at a single input voltage.
Start-Up Time
The VIN to VOUT Start-Up Time is the time interval between the point at which
the ramping input voltage crosses the Start-Up Threshold and the fully loaded
output voltage enters and remains within its specified accuracy band.
Actual measured times will vary with input source impedance, external
input capacitance, and the slew rate and final value of the input voltage as it
appears at the converter. The UWS Series implements a soft start circuit to
limit the duty cycle of its PWM controller at power up, thereby limiting the
input inrush current.
The On/Off Control to VOUT start-up time assumes the converter has its
nominal input voltage applied but is turned off via the On/Off Control pin. The
specification defines the interval between the point at which the converter is
turned on (released) and the fully loaded output voltage enters and remains
within its specified accuracy band. Similar to the VIN to VOUT start-up, the On/Off
Control to VOUT start-up time is also governed by the internal soft start circuitry
and external load capacitance. The difference in start up time from VIN to VOUT
and from On/Off Control to VOUT is therefore insignificant.
Input Source Impedance
The input of UWS converters must be driven from a low ac-impedance source.
The DC-DC’s performance and stability can be compromised by the use of
highly inductive source impedances. The input circuit shown in Figure 2 is a
practical solution that can be used to minimize the effects of inductance in the
input traces. For optimum performance, components should be mounted close
to the DC-DC converter.
Transient and Surge Protection
The input range of the UWS Q12 modules cover EN50155 requirements for
Brownout and Transient conditions with Nominal input voltage of 24Vdc.
EN50155 Standard
Nominal Input
Permanent input
range
(0.7 - 1.25 Vin)
24V
Brownout
100ms
(0.6 x Vin)
Transient
1s
(1.4 x Vin)
14.4V
33.6V
16.6 - 30V
I/O Filtering, Input Ripple Current, and Output Noise
All models in the UWS Series are tested/specified for input reflected ripple current and output noise using the specified external input/output components/
circuits and layout as shown in the following two figures. External input capacitors (CIN in Figure 2) serve primarily as energy-storage elements, minimizing line voltage variations caused by transient IR drops in conductors from
backplane to the DC-DC. Input caps should be selected for bulk capacitance
(at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The
switching nature of DC-DC converters requires that dc voltage sources have
low ac impedance as highly inductive source impedance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your specific
TO
CURRENT
PROBE
OSCILLOSCOPE
+
VIN
–
+VIN
LBUS
CBUS
CIN
–VIN
CIN = 33µF, ESR < 700mΩ @ 100kHz
CBUS = 220µF, ESR < 100mΩ @ 100kHz
LBUS = 12µH
Figure 2. Measuring Input Ripple Current
system configuration may necessitate additional considerations.
In critical applications, output ripple/noise (also referred to as periodic and
random deviations or PARD) may be reduced below specified limits using filtering
techniques, the simplest of which is the installation of additional external output
capacitors. They function as true filter elements and should be selected for bulk
capacitance, low ESR and appropriate frequency response.
All external capacitors should have appropriate voltage ratings and be
located as close to the converter as possible. Temperature variations for all
relevant parameters should also be taken carefully into consideration. The most
effective combination of external I/O capacitors will be a function of line voltage
and source impedance, as well as particular load and layout conditions.
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WDC_UWS-Q12 Series.A01.D07 Page 31 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
RLOAD
C1 = 1µF
C2 = 10µF
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple/Noise (PARD)
Floating Outputs
Since these are isolated DC-DC converters, their outputs are “floating” with
respect to their input. Designers will normally use the –Output as the ground/
return of the load circuit. You can however, use the +Output as ground/return to
effectively reverse the output polarity.
Minimum Output Loading Requirements
UWS converters employ a synchronous-rectifier design topology and all models
regulate within spec and are stable under no-load to full load conditions.
Operation under no-load conditions however might slightly increase the output
ripple and noise.
Thermal Shutdown
The UWS converters are equipped with thermal-shutdown circuitry. If environmental conditions cause the temperature of the DC-DC converter to rise above
the designed operating temperature, a precision temperature sensor will power
down the unit. When the internal temperature decreases below the threshold
of the temperature sensor, the unit will self start. See Performance/Functional
Specifications.
Output Over-Voltage Protection
The UWS output voltage is monitored for an over-voltage condition using a
comparator. The signal is optically coupled to the primary side and if the output
voltage rises to a level which could be damaging to the load, the sensing circuitry
will power down the PWM controller causing the output voltage to decrease.
Following a time-out period the PWM will restart, causing the output voltage
to ramp to its appropriate value. If the fault condition persists, and the output
voltage again climbs to excessive levels, the over-voltage circuitry will initiate
another shutdown cycle. This on/off cycling is referred to as “hiccup” mode.
Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop as the
output current demand increases. If the output voltage drops too low, the
magnetically coupled voltage used to develop primary side voltages will also
drop, thereby shutting down the PWM controller. Following a time-out period,
the PWM will restart causing the output voltage to begin ramping to their
appropriate value. If the short-circuit condition persists, another shutdown
cycle will be initiated. This on/off cycling is referred to as “hiccup” mode. The
hiccup cycling reduces the average output current, thereby preventing internal
temperatures from rising to excessive levels. The UWS Series is capable of
enduring an indefinite short circuit output condition.
Current Limiting
As soon as the output current increases to approximately 130% of its rated
value, the DC-DC converter will go into a current-limiting mode. In this condition,
the output voltage will decrease proportionately with increases in output current,
thereby maintaining somewhat constant power dissipation. This is commonly
referred to as power limiting. Current limit inception is defined as the point at
which the full-power output voltage falls below the specified tolerance. See
Performance/Functional Specifications. If the load current, being drawn from
the converter, is significant enough, the unit will go into a short circuit condition
as described below.
Remote Sense
Note: The Sense and VOUT lines are internally connected through low-value
resistors. Nevertheless, if the sense function is not used for remote regulation
the user should connect the +Sense to +VOUT and –Sense to –VOUT at the
DC-DC converter pins. UWS series converters employ a sense feature to
provide point of use regulation, thereby overcoming moderate IR drops in PCB
conductors or cabling. The remote sense lines carry very little current and
therefore require minimal cross-sectional-area conductors. The sense lines,
which are capacitively coupled to their respective output lines, are used by the
feedback control-loop to regulate the output. As such, they are not low
impedance points and must be treated with care in layouts and cabling. Sense
lines on a PCB should be run adjacent to dc signals, preferably ground.
[VOUT(+)-VOUT(–)] – [Sense(+)-Sense(–)] ≤ 10%VOUT
In cables and discrete wiring applications, twisted pair or other techniques
should be used. Output over-voltage protection is monitored at the output
voltage pin, not the Sense pin. Therefore, excessive voltage differences between
VOUT and Sense in conjunction with trim adjustment of the output voltage
can cause the over-voltage protection circuitry to activate (see Performance
Specifications for over-voltage limits). Power derating is based on maximum
output current and voltage at the converter’s output pins. Use of trim and sense
functions can cause output voltages to increase, thereby increasing output
power beyond the converter’s specified rating, or cause output voltages to climb
into the output over-voltage region. Therefore, the designer must ensure:
(VOUT at pins) x (IOUT) ≤ rated output power
Contact and PCB resistance
losses due to IR drops
+VIN
+VOUT
IOUT
+SENSE
Sense Current
ON/OFF
TRIM
CONTROL
Sense Return
–SENSE
–VIN
–VOUT
IOUT Return
Contact and PCB resistance
losses due to IR drops
Figure 4. Remote Sense Circuit Configuration
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WDC_UWS-Q12 Series.A01.D07 Page 32 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
On/Off Control
The input-side, remote On/Off Control function can be ordered to operate with
either logic type:
+VIN
Positive ("P" suffix) logic models are enabled when the On/Off pin is left
open or is pulled high (see specifications) with respect to the –Input. Positivelogic devices are disabled when the on/off pin is pulled low with respect to the
–Input.
Negative (“N” suffix) logic devices are off when the On/Off pin is left open
or is pulled high (see specifications), and on when the pin is pulled low with
respect to the –Input as per Figure 5. See specifications.
Dynamic control of the remote on/off function is best accomplished with
a mechanical relay or an open-collector/open-drain drive circuit (optically
isolated if appropriate). The drive circuit should be able to sink appropriate
current (see Performance Specifications) when activated and withstand appropriate voltage when deactivated. Applying an external voltage to pin 2 when
no input power is applied to the converter can cause permanent damage to the
converter.
+Vcc
13V CIRCUIT
ON/OFF
CONTROL
5V CIRCUIT
–VIN
Figure 5. Driving the Negative Logic On/Off Control Pin
(simplified circuit)
OUTPUT VOLTAGE ADJUSTMENT
+VOUT
+VOUT
CONTROL
CONTROL
–VOUT
–VOUT
Figure 7. Trim Connections To Decrease Output Voltages
Figure 6. Trim Connections To Increase Output Voltages
Trim Equations
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WDC_UWS-Q12 Series.A01.D07 Page 33 of 34
UWS-Q12 Series
Open-Frame Sixteenth-Brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
Vertical Wind Tunnel
IR Transparent
optical window
Unit under
test (UUT)
Murata Power Solutions employs a computer controlled customdesigned 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.
Variable
speed fan
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 10" x 10" 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 9. Vertical Wind Tunnel
Through-Hole Soldering Guidelines
Murata Power Solutions recommends the TH soldering 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:
Maximum Preheat Temperature
115° C
Maximum Pot Temperature
270° C
Maximum Solder Dwell Time
7 seconds
For Sn/Pb based solders:
Maximum Preheat Temperature
105° C
Maximum Pot Temperature
250° C
Maximum Solder Dwell Time
6 seconds
Murata Power Solutions, Inc.
129 Flanders Road, Westborough, MA 01581 USA
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. Specifications are subject to change without
notice.
© 2019 Murata Power Solutions, Inc.
www.murata-ps.com/support
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