UWS Series - power, Murata

UWS Series
www.murata-ps.com
Sixteenth-brick DOSA-C
DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FEATURES

High efficiency synchronous flyback topology

18-75 Volts DC wide input range with 3.3, 5 and
12 Volts for Output voltage
Typicall units
Typica

Up to 54 Watts total output power with
overtemperature shutdown

Tiny 1.30" x 0.90" x 0.36" open frame package
PRODUCT OVERVIEW

Industry standard DOSA "brick" format
and pinout

Extensive self-protection shut down features
The world of “brick” DC-DC converters has seen
a steady size reduction. The UWS series makes
another dramatic size shrink down to a “sixteenthbrick” width (0.90 inches) while still retaining a
high power output and full 2250 Volt DC isolation.
The PC-board mount converter family accepts
18 to 75 Volts DC inputs and delivers fixed outputs
regulated to within ±0.125%. The UWS converters
are ideal for datacom and telecom applications,
cell phone towers, data centers, server farms and
network repeaters.
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

Small footprint DC-DC converter, ideal for high
current applications

2250 Volt Basic input/output isolation (48V
models)

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
F1
*TPMBUJPO
Barrier
+Vin (1)
+Vout (8)
t4XJUDIJOH
External
DC
Power
Source
On/Off
Control
(2)
FPGA’s. N
No minimum
For systems
FPGA’
i i
lloadd iis required.
i
requiring controlled startup/shutdown, an external
remote On/Off control may use a switch, transistor
or digital logic.
Many self-protection features on the UWS series
avoid both converter and external circuit hazards.
These include input undervoltage lockout 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.
4FOTF
t'JMUFST
Controller
and Power
5SBOTGFS
Open = On
$MPTFE0GG
1PTJUJWF
MPHJD
t$VSSFOU4FOTF
4FOTF
Reference and
Error Amplifier
Trim (6)
-Vin (3)
-Vout (4)
Figure 1. Connection Diagram
Typical topology is shown. Murata Power
Solutions recommends an external fuse.
*Sense is included on the UWS-3.3/15-Q48
and UWS-5/10-Q48.
For full details go to
www.murata-ps.com/rohs
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MDC_UWS Series.D01 Page 1 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE 
Output
Root Model ➀
R/N (mV pk-pk)
Regulation (max.) ➂
C76
Package
Efficiency
Typ.
Max.
Line
Load
VIN Nom.
(V)
Min.
Typ.
Case (inches)
3.3
15 ➃
49.5
90
125
±0.15%
±0.3%
48
18-75
25
1.16
87.5%
89%
1.30 x 0.90 x 0.36
UWS-5/10-Q48
5
10 ➄
50
90
130
±0.125%
±0.125%
48
18-75
30
1.14
88%
91%
1.30 x 0.90 x 0.36
UWS-12/4.5-Q48
12
4.5 ➅
54
115
150
±0.125%
±0.125%
48
18-75
25
1.24
89%
91%
1.30 x 0.90 x 0.36
UWS-3.3/15-Q48
IOUT
Power
VOUT
(V) (A, max.) (W)
Input
➀ Please refer to the Part Number Structure when ordering.
➁ 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.
I/O caps are necessary for our test equipment and may not be needed for your
application.
Range
(V)
IIN, no load
(mA)
IIN, full
load (A)
➂ Regulation specifications describe output voltage deviations from a nominal/midpoint
value to either extreme (50% load step).
➃ Iout = 13A max. if Vin < 36V.
➄ Iout=8A max. if Vin <36V.
➅ Iout = 3.5A max. if Vin < 36V.
PART NUMBER STRUCTURE
UWS - 12 / 4.5 - Q48 N M H Lx - C
RoHS Hazardous Substance Compliance
(does not claim EU RoHS exemption 7b–lead in solder)
C = RoHS-6
Sixteenth Brick Series
Nominal Output Voltage:
Maximum Rated Output Current
Current in Amps
Input Voltage Range:
Q48 = 18–75 Volts (48V nominal)
Pin Length Option (Thru-hole only)
Blank = Standard pin length 0.180˝ (4.6mm)
L1 = 0.110˝ (2.79mm) ➀
L2 = 0.145˝ (3.68mm) ➀
Conformal Coating Option
Blank = No coating, standard
H = Coating added, optional*
(Built to order; contact Murata Power Solutions for MOQ and lead times.
(not available on SMT models)
SMT Version (MSL Rating 2)
Blank = Thru-hole
M = SMT version ➁
On/Off Control Logic:
N = Negative
P = Positive
➀ Special quantity order is required; samples available with standard pin length only.
➁ SMT (M) versions not available in sample quantities.
➂ Some model number combinations may not be available. See website or contact your local Murata sales representative.
www.murata-ps.com/support
MDC_UWS Series.D01 Page 2 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-3.3/15-Q48
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions ➀
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
0
Typical/Nominal
Maximum
80
Units
Vdc
100
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
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
18
48
75
Vdc
Recommended External Fuse
Fast blow
6
A
Start-up threshold
Rising input voltage
16.5
17
17.9
Vdc
Undervoltage lockout
Falling input voltage
15
16.25
17.50
Vdc
Overvoltage shutdown
Rising input voltage
None
Vdc
Reverse Polarity Protection
None, install external fuse
None
Vdc
Internal Filter Type
LC
Input current
Full Load Conditions
Vin = nominal
1.16
1.19
A
Low Line
Vin = minimum, 13A load
2.63
2.72
A
Inrush Transient
0.4
A2-Sec.
Output in Short Circuit
100
200
mA
No Load Input current
Iout = minimum, unit=ON
25
60
mA
Shut-Down mode Input Current (Off, UV, OT)
5
10
mA
Measured at input with specified filter
15
30
mA, pk-pk
Reflected (back) ripple current ➁
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=48V, full load
87.5
89
%
Efficiency
Vin=24V, full load
88.5
90.5
%
Isolation
Isolation Voltage, Input to Output
2250
Vdc
Insulation Safety Rating
basic
Isolation Resistance
100
MΩ
Isolation Capacitance
1300
pF
Certified to UL-60950-1, IEC/EN60950-1,
Safety
Yes
2nd Edition
Per Telcordia SR332, issue 1, class 3, ground
Calculated MTBF
3.0
Hours x 106
fixed, Tambient=+25°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
250
280
310
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
100
200
μSec
±1% of Vout
Dynamic Load Peak Deviation
Same as above,
±180
±240
mV
FEATURES and OPTIONS
Remote On/Off Control ➅
"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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MDC_UWS Series.D01 Page 3 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-3.3/15-Q48 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range
Overvoltage Protection
Current
Output Current Range
Output Current Range
Minimum Load
Current Limit Inception
Short Circuit
Short Circuit Current
Conditions ➀
See Derating
Minimum
0.0
Typical/Nominal
49.5
Maximum
50
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
3.267
3.3
±1
3.333
10
4.9
Vdc
% of Vnom.
% of Vnom.
Vdc
Vin=18V-36V
Vin=36V-75V
0.0
0.0
13.0
15.0
A
A
98% of Vnom., after warmup
18.4
25.4
A
-10
4
No minimum load
21.9
Hiccup technique, autorecovery within ±1.25%
of Vout
0.6
Output shorted to ground, no damage
Continuous
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Regulation ➆
Line Regulation
Load Regulation
A
Current limiting
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=48V
With a 1uF || 10uF output caps
With a 1uF || 100uF output caps
At all outputs
Sense connected at load
Constant resistance mode , low ESR
Ripple and Noise
Temperature Coefficient
Remote Sense Compensation 18
Maximum Capacitive Load
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
90
60
±0.02
Cxx case
LxWxH
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
±0.15
±0.3
125
10
0
10,000
1.30x0.90x0.36
33.02x22.9x9.14
0.48
13.6
0.04 & 0.060
1.016 & 1.524
Copper alloy
Through Hole Pin Diameter
EMI/RFI Shielding
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating ➃
4.3
%
%
mV pk-pk
mV pk-pk
% of Vnom./°C
% of Vout
μF
Inches
mm
Ounces
Grams
Inches
mm
50
5
μ-inches
μ-inches
None
See 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
RoHS-6
85
105
125
130
°C
°C
°C
°C
Class
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MDC_UWS Series.D01 Page 4 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-3.3/15-Q48
Power Dissipation vs. Load Current @ 25°C
6.5
6.0
5.5
5.0
Power Dissipation (Watts)
Efficiency (%)
Efficiency vs. Line Voltage and Load Current @ 25°C
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
0.8
Vin = 75V
Vin = 36V
Vin = 24V
Vin = 18V
4.5
4.0
3.5
3.0
2.5
Vin = 75V
2.0
Vin = 48V
1.5
Vin = 24V
1.0
Vin = 18V
0.5
0.8
1.8
2.8
3.8
4.8
5.9
6.9
7.9
8.9
9.9
Load Current (Amps)
10.9
12.0
13.0
14.0
1.8
4.8
5.9
6.9
7.9
8.9
9.9
Load Current (Amps)
10.9
12.0
13.0
14.0
15.0
16
15
15
Output Current (Amps)
14
Output Current (Amps)
3.8
Maximum Current Temperature Derating at Sea Level
(VIN = 36 and VIN = 48V, airflow is from pin 3 to pin 1)
Maximum Current Temperature Derating at Sea Level
(VIN = 18 and VIN = 24V, airflow is from pin 3 to pin 1)
13
0.33 to 2.0 m/s (65 to 400 LFM)
12
11
10
2.8
15.0
0.33 to 2.0 m/s (65 to 400 LFM)
14
13
12
11
30
35
40
45
50
55
60
65
70
Ambient Temperature (ºC)
75
80
10
85
30
Maximum Current Temperature Derating at Sea Level
(VIN = 60V, airflow is from pin 3 to pin 1)
35
40
45
50
55
60
65
70
Ambient Temperature (ºC)
75
80
85
80
85
Maximum Current Temperature Derating at Sea Level
(VIN = 75V, airflow is from pin 3 to pin 1)
16
15
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0+ m/s (200+ LFM)
13
Output Current (Amps)
Output Current (Amps)
15
11
9
7
5
14
13
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5+ m/s (400+ LFM)
12
11
10
30
35
40
45
50
55
60
65
70
Ambient Temperature (ºC)
75
80
85
9
30
35
40
45
50
55
60
65
70
Ambient Temperature (ºC)
75
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MDC_UWS Series.D01 Page 5 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-3.3/15-Q48
Output Ripple and Noise (Vin=48V, Vout=nom., Iout=no load,
Cload=1μF ceramic || 10μF tantalum, Ta=+25°C., ScopeBW=20MHz)
Output Ripple and Noise (Vin=48V, Vout=nom., Iout=15A,
Cload=1μF ceramic || 10μF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Vin=48V, Vout=nom., Iout=15A, Cload=0 μF, Ta=+25°C.,
ScopeBW=20MHz) Trace 1=Enable, Trace 4=Vout
Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load,
Cload=1μF ceramic || 10μF tantalum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load,
Cload=10,000 μF, Ta=+25°C., ScopeBW=20MHz)
Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural
convention is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, Q6 max Temp=120 °C/IPC9592 guidelines.
95.6°C
(+Vin)
(+Vout)
90
80
T1: 81
Q6A: 88
CR21: 82
70
Q8: 83
60
(-Vin)
(-Vout)
52.0°C
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MDC_UWS Series.D01 Page 6 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-5/10-Q48
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions ➀
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
0
Typical/Nominal
Maximum
80
Units
Vdc
100
Vdc
Isolation Voltage
2250
Vdc
Input Reverse Polarity
None
Vdc
On/Off Remote Control
0
15
Vdc
Output Power
0
50.63
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
18
48
75
Vdc
Recommended External Fuse
Fast blow
5
A
Start-up threshold, turn on
Rising input voltage
16.5
17.5
17.9
Vdc
Undervoltage shutdown, turn off
Falling input voltage
15
16.75
17.5
Vdc
Overvoltage shutdown
NA
Vdc
Reverse Polarity Protection
None, install external fuse
None
Vdc
Internal Filter Type
LC
Input current
Full Load Conditions
Vin = nominal
1.14
1.2
A
Low Line
Vin = minimum
2.44
2.51
A
Inrush Transient
0.4
A2-Sec.
Output in Short Circuit
100
200
mA
No Load Input Current
Iout = minimum, unit=ON
30
60
mA
Shut-Down Mode Input Current
5
10
mA
No filtering
150
200
mAp-p
Reflected (back) ripple current ➁
Measured at input with specified filter
15
30
mAp-p
Reflected (back) ripple current ➁
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=48V, full load
88
91
%
Efficiency
Vin=24V, full load
89.5
91
%
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 SR332, issue 1, class 3, ground
Calculated MTBF
3.0
Hours x 106
fixed, Tambient=+25°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 ➅
"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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MDC_UWS Series.D01 Page 7 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-5/10-Q48 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range
Overvoltage Protection
Current
Output Current Range
Output Current Range
Minimum Load
Current Limit Inception
Short Circuit
Ripple and Noise
19
Temperature Coefficient
Remote Sense Compensation 18
Maximum Capacitive Loading (10% ceramic,
90% Oscon)
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
Minimum
0.0
Typical/Nominal
50
Maximum
50.63
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
4.938
-1.25
-20
6.2
5
5.063
1.25
10
6.6
Vdc
% of Vset
Vin=18V to 36V
Vin=36V to 75V
0
0
98% of Vnom., cold condition
Short Circuit Current
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Regulation ➆
Line Regulation
Load Regulation
Conditions ➀
See Derating
11
6.4
No minimum load
13
Hiccup technique, autorecovery within
±1% of Vout
0.6
Output shorted to ground, no damage
Continuous
Vdc
8
10
A
15.5
A
A
Current limiting
Vin=min. to max., Vout=nom., nom load
Iout=min. to max
With a 1uF || 10 uF output caps.
With a 1uF || 100uF output caps
At all outputs
Sense connected at load
Through Hole Pin Diameter
Low ESR
±0.125
±0.125
90
65
0.02
10
0
Cxx case
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
RoHS rating ➃
Nickel subplate
Gold overplate
See derating curves
Vin = Zero (no power)
No derating required
Measured at hotspot
External filter is required
130
-40
-55
-40
115
V
V
mV pk-pk
mV pk-pk
% of Vout./°C
% of Vout
5000
μF
1.30x0.90x0.36
33.02x22.9x9.14
0.48
13.6
0.04 & 0.060
1.016 & 1.524
Gold-plated copper
alloy with nickel
underplate
50
5
none
Inches
mm
Ounces
Grams
Inches
mm
125
B
RoHS-6
μ-inches
μ-inches
85
125
105
130
°C
°C
°C
°C
Class
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MDC_UWS Series.D01 Page 8 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-5/10-Q48
Efficiency vs. Line Voltage and Load Current @ 25°C – Vin = 18V-36V
Efficiency vs. Line Voltage and Load Current @ 25°C – Vin = 36V-75V
95
92
90
90
88
Vin = 36V
Vin = 75V
85
Vin = 24V
Vin = 60V
Vin = 18V
84
Efficiency (%)
Efficiency (%)
86
82
80
78
80
Vin = 48V
Vin = 36V
75
70
76
65
74
72
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Load Current (Amps)
5.5
6
6.5
7
7.5
60
0.5
8
1
10
9
9
8
Output Current (Amps)
Output Current (Amps)
10
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 to 2.0 m/s (200-400 LFM)
6
2
2.5
3
3.5
5
4
3
4.5 5 5.5 6 6.5
Load Current (Amps)
7
7.5
8
8.5
9
9.5
10
8
0.33 to 2.0 m/s (65 to 400 LFM)
7
6
5
4
30
35
40
45
50
55
60
65
70
75
80
30
85
35
40
45
50
55
60
65
70
75
80
85
75
80
85
Ambient Temperature (ºC)
Ambient Temperature (ºC)
Maximum Current Temperature Derating at Sea Level
(VIN = 36, airflow is from pin 1 to pin 3)
Maximum Current Temperature Derating at Sea Level
(VIN = 48V, airflow is from pin 3 to pin 1)
11
11
10
10
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
9
8
7
Output Current (Amps)
Output Current (Amps)
4
Maximum Current Temperature Derating at Sea Level
(VIN = 24, airflow is from pin 1 to pin 3)
Maximum Current Temperature Derating at Sea Level
(VIN = 18, airflow is from pin 1 to pin 3)
7
1.5
6
5
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
9
8
7
6
5
4
4
30
35
40
45
50
55
60
65
Ambient Temperature (ºC)
70
75
80
85
30
35
40
45
50
55
60
65
70
Ambient Temperature (ºC)
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MDC_UWS Series.D01 Page 9 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-5/10-Q48
Maximum Current Temperature Derating at Sea Level
(VIN = 60, airflow is from pin 1 to pin 3)
Maximum Current Temperature Derating at Sea Level
(VIN = 75 airflow is from pin 1 to pin 3)
11
11
10
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
9
8
7
Output Current (Amps)
Output Current (Amps)
10
6
5
9
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
8
7
6
5
4
4
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
Power On Starup Delay (Vin=0 to 48V, Vout=nom, Iout=10A, Cload=0 uF, Ta=+25°C.,
ScopeBW=20Mhz) Trace 1=Vin, Trace 4=Vout
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
Power On Starup Delay (Vin=0 to 48V, Vout=nom, Iout=0A, Cload=0 uF, Ta=+25°C.,
ScopeBW=20Mhz) Trace 1=Vin, Trace 4=Vout
On/Off Enable Delay (Vin=48V, Vout=nom, Iout=10A, Cload=0 uF, Ta=+25°C.,
ScopeBW=20Mhz) Trace 1=Enable, Trace 4=Vout
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MDC_UWS Series.D01 Page 10 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-5/10-Q48
Output Ripple and Noise (Vin=48V, Vout=nom., Iout=10A, Cload=1 uFceramic || 10uf
tantulum, Ta=+25°C., ScopeBW=20MHz)
Output Ripple and Noise (Vin=48V, Vout=nom., Iout=0A, Cload=1 uFceramic || 10uf tantulum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load, Cload=1
uF ceramic || 10uF tantalum, Ta=+25°C., ScopeBW=20MHz Ch1=5Vo, Ch2=Io 2amps\div)
Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load,
Cload=680uF, Ta=+25°C., ScopeBW=20MHz Ch1=5Vo, Ch2=Io 2amps\div)
Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural convention is used with no forced airflow.
Identifiable and recommended maximum value to be verified in application. Vin=48V, Q6 max Temp=120 °C/IPC9592 guidelines.
98.2°C
(+Vin)
(+Vout)
90
80
70
T1: 81
60
Q6: 89
Q8: 75
50
(-Vin)
(-Vout)
44.4°C
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MDC_UWS Series.D01 Page 11 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-12/4.5-Q48
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Conditions ➀
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
0
Typical/Nominal
Maximum
80
Units
Vdc
100
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
18
48
75
Vdc
Recommended External Fuse
Fast blow
6
A
Start-up threshold
Rising input voltage
16.5
17.2
17.9
Vdc
Undervoltage lockout
Falling input voltage
15
16.5
17.50
Vdc
Overvoltage shutdown
Rising input voltage
None
Vdc
Reverse Polarity Protection
None, install external fuse
None
Vdc
Internal Filter Type
capacitive
Input current
Full Load Conditions
Vin = nominal
1.24
1.28
A
Low Line
Vin = minimum , 3.5A load
2.55
2.63
A
Inrush Transient
0.05
A2-Sec.
Output in Short Circuit
100
200
mA
No Load Input Current
Iout = minimum, unit=ON
25
60
mA
Shut-Down Mode Input Currrent (Off, UV, OT)
5
10
mA
Measured at input with specified filter
30
40
mA, pk-pk
Reflected (back) ripple current ➁
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Vin=48V, full load
89
91
%
Efficiency
Vin=24V, full load
89.5
91.5
%
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
UL-60950-1, IEC/EN60950-1, 2nd Edition
Yes
requirements)
Per Telcordia SR332, issue 1, class 3, ground
3.0
Hours x 106
Calculated MTBF ➃
fixed, Tambient=+25°C
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
200
230
260
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 ➅
"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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MDC_UWS Series.D01 Page 12 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
FUNCTIONAL SPECIFICATIONS, UWS-12/4.5-Q48 (CONT.)
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range
Overvoltage Protection
Current
Output Current Range
Output Current Range
Minimum Load
Current Limit Inception
Short Circuit
Short Circuit Current
Conditions ➀
See Derating
Minimum
0.0
Typical/Nominal
54.0
Maximum
54.54
Units
W
No trim
At 50% load
User-adjustable
Via magnetic feedback
11.88
12.00
±1
12.12
10
18
Vdc
% of Vnom.
% of Vnom.
Vdc
Vin=18V-36V
Vin=36V-75V
0.0
0.0
3.5
4.5
A
A
98% of Vnom., after warmup
5.05
7.4
A
-20
13.3
No minimum load
6.4
Hiccup technique, autorecovery within ±1.25%
of Vout
0.6
Output shorted to ground, no damage
Continuous
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Regulation ➆
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Load
MECHANICAL
Outline Dimensions
(Please refer to outline drawing)
Weight
A
Current limiting
Vin=min. to max., Vout=nom., full load
Iout=min. to max., Vin=48V
with a 1uF || 10uF output caps
At all outputs
Constant resistance mode, low ESR
0
Cxx case
LxWxH
Through Hole Pin Material
TH Pin Plating Metal and Thickness
115
±0.02
2200
±0.125
±0.125
150
1.30x0.90x0.36
33.02x22.9x9.14
0.48
13.6
0.04 & 0.060
1.016 & 1.524
Copper alloy
50
5
Through Hole Pin Diameter
EMI/RFI Shielding
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating ➃
15.3
Nickel subplate
Gold overplate
%
%
mV pk-pk
% of Vnom./°C
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
RoHS-6
85
105
125
130
°C
°C
°C
°C
Class
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MDC_UWS Series.D01 Page 13 of 25
UWS Series
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. 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. Note that Maximum Current Derating Curves indicate an average current
at nominal input voltage. At higher temperatures and/or lower airflow, the
converter will tolerate brief full current outputs if the average RMS current
over time does not exceed the Derating curve. All Derating curves are
presented at sea level altitude. Be aware of reduced power dissipation
with increasing density altitude.
4. Mean Time Before Failure (MTBF) is calculated using the Telcordia
(Belcore) SR-332 Method 1, Case 3, Issue 1, ground fixed conditions. Operating temperature = +30°C, full output load, natural air convection.
5. The output may be shorted to ground indefinitely with no damage. The
Output Short Circuit Current shown in the specifications is an average consisting of very short bursts of full rated current to test whether the output
circuit can be repowered.
6. 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.
7. 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).
8. Do not exceed maximum power ratings or output overvoltage when adjusting output trim values.
9. At zero output current, Vout may contain components which slightly
exceed the ripple and noise specifications.
10. Output overload protection is non-latching. When the output overload
is removed, the output will automatically recover.
11. All models are fully operational and meet published specifications,
including “cold start” at –40°C.
12. 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.
13. Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting.
14. 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.
15. To avoid damage or unplanned shutdown, do not sink appreciable reverse
output current.
16. 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.
17. Although extremely unlikely, failure of the internal components of this
product may expose external application circuits to dangerous voltages,
currents, temperatures or power levels. Please thoroughly verify all applications before committing them to service. Be sure to include appropriately-rated FUSES (see specifications and Application Notes) to reduce the
risk of failure.
18. If remote sense is not used, connect it to its respective Vout terminal.
Sense is included on UWS-3.3/15-Q48 and UWS-5/10-Q48 models only.
19 Output Ripple and Noise for the UWS-5/10-Q48 model with a 1uF and
100uF Tantalum Output Capacitor is 65mVp-p (Typical).
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MDC_UWS Series.D01 Page 14 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q48
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
0.5
Power Dissipation vs. Load Current @ 25°C
6.50
6.00
5.50
Power Dissipation (W)
Efficiency (%)
Efficiency vs. Line Voltage and Load Current @ 25°C
Vin = 18V
Vin = 24V
Vin = 48V
Vin = 75V
5.00
4.50
4.00
3.50
3.00
Vin = 18V
Vin = 24V
Vin = 48V
Vin = 75V
2.50
2.00
1.50
1.00
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.50
4.5
0.5
1.0
1.5
2.0
Load Current (A)
3.9
3.9
3.7
3.7
3.5
0.33, 0.5, 1.0, 1.5, & 2.0 m/s
(65, 100, 200, 300, & 400 LFM)
3.1
2.9
2.7
2.5
30
35
40
45
50
55
60
65
70
75
80
2.9
2.7
2.5
30
85
35
40
45
Output Current (Amps)
Output Current (Amps)
4.6
4.5
0.33, 0.5, 1.0, 1.5, & 2.0 m/s
(65, 100, 200, 300, & 400 LFM)
4.3
4.2
4.1
50
55
60
65
Ambient Temperature (ºC)
55
60
65
70
75
80
85
80
85
Maximum Current Temperature Derating at Sea Level
(Vin = 75 air flow from Pin J1 to Pin J3 on PCB)
4.6
45
50
Ambient Temperature (ºC)
4.7
40
4.5
3.1
4.7
35
4.0
0.33, 0.5, 1.0, 1.5, & 2.0 m/s
(65, 100, 200, 300, & 400 LFM)
3.3
Maximum Current Temperature Derating at Sea Level
(Vin = 48 air flow from Pin J1 to Pin J3 on PCB)
4.0
30
3.5
3.5
Ambient Temperature (ºC)
4.4
3.0
Maximum Current Temperature Derating at Sea Level
(Vin = 24 air flow from Pin J1 to Pin J3 on PCB)
Output Current (Amps)
Output Current (Amps)
Maximum Current Temperature Derating at Sea Level
(Vin = 18V, air flow from Pin J1 to Pin J3)
3.3
2.5
Load Current (A)
70
75
80
85
4.5
4.4
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0, 1.5, & 2.0 m/s (200, 300, & 400 LFM)
4.3
4.2
4.1
4.0
30
35
40
45
50
55
60
65
70
75
Ambient Temperature (ºC)
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MDC_UWS Series.D01 Page 15 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q48
Output Ripple and Noise (Vin=48V, Vout=nom., Iout=no load,
Cload=1μF ceramic || 10μF tantalum, Ta=+25°C., ScopeBW=20MHz)
Output Ripple and Noise (Vin=48V, Vout=nom., Iout=4.5A,
Cload=1μF ceramic || 10μF tantalum, Ta=+25°C., ScopeBW=20MHz)
On/Off Enable Delay (Vin=48V, Vout=nom., Iout=no load, Cload=0 μF, Ta=+25°C.,
ScopeBW=20MHz) Trace 1=Enable, Trace 4=Vout
On/Off Enable Delay (Vin=48V, Vout=nom., Iout=4.5A, Cload=0 μF, Ta=+25°C.,
ScopeBW=20MHz) Trace 1=Enable, Trace 4=Vout
Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load,
Cload=1μF ceramic || 10μF tantalum, Ta=+25°C., ScopeBW=20MHz)
Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load,
Cload=2200 μF, Ta=+25°C., ScopeBW=20MHz)
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MDC_UWS Series.D01 Page 16 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TYPICAL PERFORMANCE DATA, UWS-12/4.5-Q48
Power On Startup Delay (Vin=0 to 48V, Vout=nom., Iout=no load, Cload=0 μF, Ta=+25°C.,
ScopeBW=20MHz) Trace 1=Vin, Trace 4=Vout
Power On Startup Delay (Vin=0 to 48V, Vout=nom., Iout=4.5A, Cload=0 μF, Ta=+25°C.,
ScopeBW=20MHz) Trace 1=Vin, Trace 4=Vout
Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural
convention is used with no forced airflow. Identifiable and recommended maximum value
to be verified in application. Vin=48V, Q6 and T1 max Temp=120 °C/IPC9592 guidelines.
89.0°C
(+Vin)
(+Vout)
80
T1: 82
70
Q8: 73
Q6: 82
60
(-Vin)
(-Vout)
50
49.8°C
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MDC_UWS Series.D01 Page 17 of 25
UWS Series
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 .062 Pins: copper alloy
Finish: (all pins)
Gold (5u"min) over nickel (50u" min)
END VIEW
0.36
(9.14)
0.18 (4.6)
0.125
(3.175)
REF
0.010 (0.25) MIN
CLEARANCE
.040 (1.02) @
PINS 1-3, 5-7
.060 (15.24) @
PINS 4 & 8
SIDE VIEW
PIN
#3
1.30
(33.0)
1.100
(27.9)
PIN
#4
4
5*
6 0.150(3.81)
2
7*
0.150
8
1
0.550
(13.97)
0.90 (22.9)
3
0.300
(7.62)
CL
0.300
(7.62)
PIN
#8
Pin
3
2
BOTTOM PIN VIEW
CL
1
INPUT/OUTPUT CONNECTIONS P75
Function
Pin
Function
–Vin
4
–Vout
5
–Sense*
On/Off Control 6
Output Trim
7
+Sense*
+Vin
8
+Vout
* Sense is included only on models UWS-3.3/15-Q48
and UWS-5/10-Q48. Sense pins are omitted on
other models.
Note that some competitive units may use different
pin numbering or alternate outline views. However,
all units are pinout compatible.
Recommended Footprint For Thru-hole Converter
(View Through Converter)
Standard pin length is shown. Please refer to the
part number structure for alternate pin lengths.
Top View
Finished Hole Sizes
@ Pins 1-3, 6, 5*, 7*
(Pri)
(Per Ipc-d-275, Level C)
.048-.062
23.4
.92
It is recommended that no parts be placed beneath
the converter.
(Sec)
1.100
11.7
.46
CL
1
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
7.62
.300
7*
2
6
7.62
.300
5*
3
.100 Min
Annular Ring
For All Pin
Shoulders
3.81
.150
8
4
14.0
.55
CL
33.5
1.32
3.81
.150
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
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MDC_UWS Series.D01 Page 18 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
MECHANICAL SPECIFICATIONS, SURFACE MOUNT (MSL RATING 2)
0.116 (2.95) MAX
PCB thickness
(REF)
Material:
END VIEW
SMT contacts: copper alloy
Finish: (all pins)
Gold (5u"min) over nickel (50u" min)
0.36
(9.14)
0.010 (0.25) MIN
CLEARANCE
.062 (1.57) TYP
(ALL PINS)
0.125
(3.175)
REF
SIDE VIEW
1.30
(33.0)
1.100
(27.9)
3
4
0.300
(7.62)2
6
0.300
(7.62)
5*
0.150(3.81)
0.150
7*
1
PIN
#4
0.90 (22.9)
CL
PIN
#8
8
0.550
(13.97)
Pin
3
BOTTOM PIN VIEW
2
CL
1
INPUT/OUTPUT CONNECTIONS P75
Function
Pin
Function
–Vin
4
–Vout
5
–Sense*
On/Off Control 6
Output Trim
7
+Sense*
+Vin
8
+Vout
* Sense is included only on models UWS-3.3/15-Q48
and UWS-5/10-Q48. Sense pins are omitted on other
models.
Recommended Footprint
(View Through Converter)
Note that some competitive units may use different
pin numbering or alternate outline views. However,
all units are pinout compatible.
Top View
(Pri)
It is recommended that no parts be placed beneath
the converter.
(Sec)
27.94
1.100
23.4
.92
11.7
.46
CL
3.81
.150
Dimensions are in inches (mm) shown for ref. only.
8
1
7
.
7*
2
6
7.62
.300
5*
3
Third Angle Projection
4
3.81
.150
14.0
.55
CL
33.5
1.32
.070 Min Pad
(6 Or 8 Places
As Required)
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 1˚
Components are shown for reference only
and may vary between units.
www.murata-ps.com/support
MDC_UWS Series.D01 Page 19 of 25
UWS Series
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
ts
128
uni
ts
79
12.
128
(3
uni
Each tray is 4 x 8 units
(32 units total per tray)
6 (3
20)
11.42 (290)
13.
50)
128 units
per carton
Label
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.
1
.3
R0 .00)
(8
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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MDC_UWS Series.D01 Page 20 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
TAPE AND REEL INFORMATION (MSL RATING 2)
[2.0]
0.079
Pin #1
6-8mm
PICK-UP
NOZZLE
Feed (Unwind)
Direction ---Round
Holes
1.75
.069
[18.92]
0.745
44.00
1.732
32.00
1.260
PITCH
Oblong
Holes
Top Cover Tape
[9.65]
.38 REF
330.20
13.00
TAPE AND REEL
(200 UNITS
PER REEL)
13.00
.512
101.60
4.00
CORE
44.0
1.73
REF
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 ± 1˚
Components are shown for reference only.
www.murata-ps.com/support
MDC_UWS Series.D01 Page 21 of 25
UWS Series
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.
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
system configuration may necessitate additional considerations.
TO
OSCILLOSCOPE
CURRENT
PROBE
+VIN
LBUS
+
VIN
CBUS
CIN
–
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.
–VIN
CIN = 33μF, ESR < 700mΩ @ 100kHz
CBUS = 220μF, ESR < 100mΩ @ 100kHz
LBUS = 12μH
Figure 2. Measuring Input Ripple Current
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.
+SENSE
+VOUT
C1
C2
SCOPE
RLOAD
–VOUT
–SENSE
C1 = 1μF
C2 = 10μF
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple/Noise (PARD)
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MDC_UWS Series.D01 Page 22 of 25
UWS Series
Sixteenth-brick DOSA-Compatible,
Wide Input Isolated DC-DC Converters
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.
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.
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.
Remote Sense (models UWS-3.3/15-Q48 and UWS-5/10-Q48 only)
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 DCDC converter pins. ULS 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
CONTROL
TRIM
LOAD
Sense Return
–SENSE
IOUT Return
–VIN
–VOUT
Contact and PCB resistance
losses due to IR drops
Figure 4. Remote Sense Circuit Configuration
Sense is included only on models UWS-3.3/15-Q48 and UWS-5/10-Q48.
www.murata-ps.com/support
MDC_UWS Series.D01 Page 23 of 25
UWS Series
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
+Vcc
13V CIRCUIT
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 as per
Figure 4. Positive-logic devices are disabled when the on/off pin is pulled low
with respect to the –Input.
ON/OFF
CONTROL
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. See specifications.
5V CIRCUIT
–VIN
Figure 5. Driving the Negative Logic On/Off Control Pin
(simplified circuit)
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.
Trim Equations
Trim Down
511
RT DOWN (kΩ) =
Where Δ% =
|( V
Δ%
– 10.22
– VNOM
× 100
VNOM
OUT
)|
Trim Up
RT UP (kΩ) =
Where Δ% =
5.11 × VOUT × (100 + Δ%)
–
1.225 × Δ%
|( V
– VNOM
× 100
VNOM
OUT
511
– 10.22
Δ%
)|
Note: “Δ%” is always a positive value.
“VNOM” is the nominal, rated output voltage.
“VOUT” is the desired, changed output voltage.
OUTPUT VOLTAGE ADJUSTMENT
+VOUT
+VIN
+VOUT
+VIN
+SENSE
+SENSE
ON/OFF
CONTROL
TRIM
LOAD
RTRIM UP
ON/OFF
CONTROL
–VOUT
Figure 6. Trim Connections To Increase Output Voltages
LOAD
–SENSE
–SENSE
–VIN
RTRIM DOWN
TRIM
–VIN
–VOUT
Figure 7. Trim Connections To Decrease Output Voltages
Sense is included on UWS-3.3/15-D48 and UWS-5/10-Q48. Connect Trim to the respective Vout pin if sense is not installed.
www.murata-ps.com/support
MDC_UWS Series.D01 Page 24 of 25
UWS Series
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 8. Vertical Wind Tunnel
Through-hole Soldering Guidelines
SMT Reflow 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.
The surface-mount reflow solder profile shown below is suitable for SAC305 type leadfree solders. This graph should be used only as a guideline. Many other factors influence
the success of SMT reflow soldering. Since your production environment may differ,
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.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2015 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_UWS Series.D01 Page 25 of 25