UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 1 of 23
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For full details go to
www.murata-ps.com/rohs
FEATURES
Industry-standard through-hole eighth-brick
package with 0.9" x 2.3" x 0.38" outline
dimensions
Choice of two wide input ranges, 9-36 Vdc or
18-75 Vdc
Fixed output from 3.3 to 24 Volts DC up to 75
Watts
Synchronous rectifi cation yields very high
effi ciency and low power dissipation
Operating temperature range from -40 to
+85˚C with derating
Up to 2250 Volt DC isolation (Q48 models)
Outstanding thermal performance and derating
Extensive self-protection, overtemperature
and overload features with no output reverse
conduction
On/Off control, trim and remote sense functions
Certifi ed to UL/EN/IEC 60950-1, CAN/CSA-C22.2
No. 60950-1, 2nd Edition, safety approvals
and EN55022/CISPR22 standards
Pre-bias operation for startup protection
With dimensions of only 0.9 by 2.3 by 0.38
inches, the UWE series open frame DC-DC convert-
ers deliver up to 75 Watts in an industry-standard
“eighth-brick” through-hole package. This format
can plug directly into quarter-brick pinouts. Several
standard fi xed-output voltages from 3.3 Vdc to 24
Vdc assure compatibility in embedded equipment,
CPU cards and instrument subsystems. The extend-
ed 4-to-1 input power range (9-36V) is ideal for
battery-powered, telecom or portable applications.
Very high effi ciency means no fans or temperature
deratings in many applications. An optional thermal
mounting baseplate extends operation into most
conceivable environments.
The synchronous rectifi er design uses the
maximum available duty cycle for greatest ef-
fi ciency and low power dissipation with no reverse
output conduction. Other features include low
on-resistance FET’s, planar magnetics and heavy-
copper PC boards. These deliver low output noise,
tight line/load regulation, stable no-load operation
and fast load step response. All units are precision
assembled in a highly automated facility with ISO-
traceable manufacturing quality standards.
Isolation of 2250 Volts (Q48 models) assures
safety and fully differential (fl oating) operation for
greatest application fl exibility. On-board Sense in-
puts compensate for line drop errors at high output
currents. Outputs are trimmable within ±10% of
nominal voltage. The UWE series are functionally
complete.
A wealth of protection features prevents damage
to both the converter and outside circuits. Inputs
are protected from undervoltage and outputs fea-
ture short circuit protection, overcurrent and excess
temperature shut down. Overloads automatically
recover using the “hiccup” technique upon fault
removal. The UWE is certifi ed to standard safety
and EMI/RFI approvals. All units meet RoHS-6
hazardous materials compliance.
PRODUCT OVERVIEW
The UWE Series "Eighth-Brick" DC-DC Converters are high-current isolated
power modules designed for use in high-density system boards.
FEATURES
T
Typical unit
Figure 1. Simplifi ed Block Diagram
+SENSE
+V
OUT
−V
OUT
−SENSE
TRIM
–V
IN
+V
IN
ON/OFF
CONTROL
SWITCH
DRIVE
Typical topology is shown.
REFERENCE
AMPLIFIER,
TRIM AND FEEDBACK
VOLTAGE
REGULATOR
SS
UV, OT
ISOLATION
PWM
Q48 models only
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 2 of 23
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PART NUMBER STRUCTURE
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Root Model
Output Input Effi ciency
Package
(Case, Pinout)
VOUT
(V)
IOUT
(A)
Power
(W)
R/N (mVp-p) ➂Regulation (max.) VIN Nom.
(V)
Range
(V)
IIN, no
load
(mA)
IIN, full
load
(A) Min. Typ.Typ. Max. Line Load
UWE-3.3/20-Q12 3.3 20 66 80 125 ±0.25% ±0.25% 12 9-36 160 6.18 87% 89%
C77, P32
UWE-3.3/20-Q48 3.3 20 66 165 225 ±0.2% ±0.25% 48 18-75 75 1.54 88% 89.5%
UWE-5/15-Q12 5.0 15 75 80 125 ±0.25% ±0.125% 12 9-36 185 6.87 89% 91%
UWE-5/15-Q48 5.0 15 75 135 150 ±0.2% ±0.15% 48 18-75 90 1.74 88.5% 90%
UWE-12/6-Q12 12.0 6 72 120 180 ±0.125% ±0.05% 12 9-36 200 6.56 90% 91.5%
UWE-12/6-Q48 12.0 6 72 115 150 ±0.1% ±0.075% 48 18-75 90 1.65 89% 91%
UWE-15/5-Q12 15.0 5 75 65 125 ±0.125% ±0.075% 12 9-36 270 6.83 89.5% 91.5%
UWE-15/5-Q48 15.0 5 75 90 150 ±0.125% ±0.125% 48 18-75 90 1.73 89% 90.5%
UWE-24/3-Q12 24.0 3 72 190 275 ±0.125% ±0.125% 12 9-36 110 6.70 88.3% 89.5%
Please refer to the part number structure for additonal ordering model numbers and options.
All specifi cations are at nominal line voltage, nominal output voltage and full load, +25° C.
unless otherwise noted. See detailed specifi cations.
Output capacitors are 1 µF ceramic in parallel with 10 µF electrolytic. Input cap is 100 µF. All
caps are low ESR types. Contact Murata Power Solutions for details.
I/O caps are necessary for our test equipment and may not be needed for your application.
Load regulation range: 0.1-3A. This is required only for our test equipment. The converter will
operate at zero output current with degraded regulation.
Maximum Rated Output
Current in Amps
Eighth-Brick Package
Wide Input Range
Unipolar, Single-Output
Nominal Output Voltage
U E -/Q12-12 6
Input Voltage Range
Q12 = 9-36 Volts
Q48 = 18-75 Volts
C
RoHS Hazardous Materials Compliance
C=RoHS-6, standard (does not claim EU RoHS exemption 7b–lead in solder)
-
WP
On/Off Control Logic
P = Positive logic (standard for Q12 models, optional for Q48 models)
N = Negative logic (standard for Q48 models, optional special order for Q12 models)
B
Baseplate (optional)
Blank = No baseplate (standard)
B = Baseplate installed (optional special order)
Blank = Standard pin length 0.19 inches (4.8mm)
L1 = Pin length 0.110 inches (2.79mm)*
L2 = Pin length 0.145 inches (3.68mm)*
LX
Pin Length Option
Special Customer Confi guration part numbers:
1) UWE-12/6-Q48NB-C-CIS
2) UWE-12/6-Q48NBL1-C-CIS
3) UWE-15/5-Q12P-31318-C (tested to 2500Vdc isolation; all other
standard product specifi cations plus conformal coating apply.)
4) UWE-12/6-Q48NBHL1-C-CIS
Note:
Some model number combinations
may not be available. Please contact
Murata Power Solutions.
*Special quantity order is required;
no sample quantities available.
H
Conformal Coating Option
Blank = No coating, standard
H = Coating added, optional*
(built to order; contact Murata Power Solutions for MOQ and lead times.)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 3 of 23
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FUNCTIONAL SPECIFICATIONS, Q12 MODELS
UWE-3.3/20-Q12 UWE-5/15-Q12 UWE-12/6-Q12 UWE-15/5-Q12 UWE-24/3-Q12
Specs are typical unless noted.
INPUT
Input voltage range See ordering guide
Start-up threshold, Volts 9.5 9
Undervoltage shutdown, V. 8.5 8 8 8.2 8
Overvoltage shutdown, V. none
Refl ected (back) ripple current, mA pk-pk ②25 10 40 1 40
Suggested external fast blow fuse, A 25 20 20 20 20
Input current
Full load conditions See ordering guide
Inrush transient, A2sec 0.1 A2sec
Input current if output is in short circuit, mA 250 200 250 250 250
No load, mA 160 185 200 270 110
Low line (Vin=min.), Amps 8.33 9.42 8.89 9.36 9.04
Standby mode, mA 85555
(Off, UV, OT shutdown)
Internal input fi lter type L-C
Reverse polarity protection None, install external fuse
Remote On/Off control
Positive logic ("P" model suffi x) OFF=Ground pin to +0.8V max.
ON=open pin or +3.5 to +15V max.
Negative logic ("N" model suffi x) OFF=open pin or +5V to +15V max.
ON=Ground pin or 0 to +0.8V max.
Current, mA 1
OUTPUT
Voltage output range See ordering guide
Voltage output accuracy ±1% of Vnom., (50% load)
Adjustment range -10 to +10% of Vnom.
Temperature coeffi cient ±0.02% of Vout range per °C
Minimum loading No minimum load
Remote sense compensation +10% max.
Ripple/noise (20 MHz bandwidth) See ordering guide
Line/Load regulation See ordering guide
Effi ciency See ordering guide
Maximum capacitive loading, μF
low ESR, resistive load 10,000 10,000 4,700 4700 1500
Isolation voltage
Input to Output, Volts min. DC 1500
Input to baseplate, Volts min. DC 1500
Baseplate to output, Volts min. DC 750
Isolation resistance, MΩ 100
Isolation capacitance, pF 1500 1000 1000 1000 1000
Isolation safety rating Basic insulation
Current limit inception (98% of
Vout, after warmup), Amps 27 22.5 8.5 7.25 4.0
Short circuit protection method Current limiting, hiccup autorestart. Remove overload for recovery.
Short circuit current, Amps 0.5 1.0 1.5 1.5 1.0
Short circuit duration Continuous, output shorted to ground. No damage.
Overvoltage protection, Volts
(via magnetic feedback) 4.56 151829
18
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 4 of 23
www.murata-ps.com/support
FUNCTIONAL SPECIFICATIONS, Q12 MODELS, CONTINUED
DYNAMIC CHARACTERISTICS UWE-3.3/20-Q12 UWE-5/15-Q12 UWE-12/6-Q12 UWE-15/5-Q12 UWE-24/3-Q12
Dynamic load response, μSec
(50-75-50% load step) to ±1%
of fi nal value
50
Start-up time
Vin to Vout regulated, mSec 20 20 40 30 40
Remote On/Off to Vout regulated, mSec 5 15302530
Switching frequency, KHz 245±25 215-250 275 ±25 275 ±25 215 ±15
ENVIRONMENTAL
Operating temperature range, no baseplate
with derating, °C (see Derating curves) -40 to +85 with derating
Storage temperature range, °C -55 to +125
Maximum baseplate operating temperature, °C +100
Thermal protection/shutdown, °C +120
Relative humidity to +85°C/85% non-condensing
PHYSICAL
Outline dimensions See mechanical specs
Pin material Copper alloy
Pin Finish Nickel underplate with gold overplate (see mechanical specs for details)
Pin diameter, inches 0.04/0.062
Pin diameter, mm 1.016/1.575
Weight, ounces 0.7
Weight, grams 20
Electromagnetic interference (conducted) Meets EN55022 and CISPR22 class B with external fi lter.
Safety Meets UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1
FUNCTIONAL SPECIFICATIONS, Q48 MODELS
UWE-3.3/20-Q48 UWE-5/15-Q48 UWE-12/6-Q48 UWE-15/5-Q48
Specs are typical unless noted.
INPUT
Input voltage range See ordering guide
Start-up threshold, Volts 17.5 17.5 17.5 17.5
Undervoltage shutdown, V. (@ ½ load) 16.5 16.0 16.0 16.0
Overvoltage shutdown, V. none
Refl ected (back) ripple current, mA pk-pk 30 30 40 40
Suggested external fast blow fuse, A 8 101020
Input current
Full load conditions
Inrush transient, A2sec 0.1 A2sec 0.1 A2sec 0.1 A2sec 0.1 A2sec
Input current if output is in short circuit, mA 150 250 100 250
No load, mA 75 90 90 90
Low line (Vin=min.), Amps 4.1 4.6 4.35 4.71
Standby mode, mA 4545
(Off, UV, OT shutdown)
Internal input fi lter type Pi-type L-C Pi-type L-C
Reverse polarity protection None, install external fuse
Remote On/Off control
Positive logic ("P" model suffi x) OFF = Ground pin to +0.8V max.
ON = Open pin or +3.5V to +15V max.
Negative logic ("N" model suffi x) OFF = Open pin or +5V to +15V max.
ON = Ground pin to +1V max.
Current, mA 1
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 5 of 23
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FUNCTIONAL SPECIFICATIONS, Q48 MODELS, CONTINUED
OUTPUT UWE-3.3/20-Q48 UWE-5/15-Q48 UWE-12/6-Q48 UWE-15/5-Q48
Voltage output range See ordering guide
Voltage output accuracy ±1% of Vnom., (50% load)
Adjustment range -10 to +10% of Vnom.
Temperature coeffi cient ±0.02% of Vout range per °C
Minimum loading No minimum load
Remote sense compensation +10% max.
Ripple/noise (20 MHz bandwidth) See ordering guide
Line/Load regulation See ordering guide
Effi ciency See ordering guide
Maximum capacitive loading, μF
low ESR <0.02Ω max., resistive load 4,700 10,000 4,700 3300
Isolation voltage
Input to Output, Volts min. DC 2250
Input to baseplate, Volts min. DC 1500
Baseplate to output, Volts min. DC 750
Isolation resistance, MΩ 100
Isolation capacitance, pF 1000 1500 1000 1000
Isolation safety rating Basic insulation
Current limit inception (98% of
Vout, after warmup), Amps 26.5 21.0 8.0 7.05
Short circuit protection method Current limiting, hiccup autorestart. Remove overload for recovery.
Short circuit current, Amps 5.0 1.5 1.0 1.5
Short circuit duration Continuous, output shorted to ground. No damage.
Overvoltage protection, Volts
(via magnetic feedback) 4 6.5 15 18
DYNAMIC CHARACTERISTICS
Dynamic load response, μSec
(50-75-50% load step) to fi nal value 50 (to ± 2%) 50 (to ± 2%) 50 (to ± 1%) 50 (to ± 1%)
Start-up time
Vin to Vout regulated, mSec 20 20 30 30
Remote On/Off to Vout regulated, mSec 10 20 20 25
Switching frequency, KHz 215±20 240±20 220±20 225±25
ENVIRONMENTAL
Operating temperature range, no baseplate
with derating, °C (see Derating curves) -40 to +85 with derating
Storage temperature range, °C -55 to +125
Maximum baseplate operating temperature, °C +100 +105 +100 +105
Thermal protection/shutdown, °C +120 +120 +120 +120
Relative humidity to +85°C/85% non-condensing
PHYSICAL
Outline dimensions See mechanical specs
Pin material Copper alloy
Pin Finish Nickel underplate with gold overplate (see mechanical specs for details)
Pin diameter, inches 0.04/0.062
Pin diameter, mm 1.016/1.575
Weight, ounces 0.7
Weight, grams 20
Electromagnetic interference (conducted) Meets EN55022 and CISPR22 class B with external fi lter.
Safety Certifi ed to UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1, 2nd Edition
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 6 of 23
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Input Voltage
Q12 Models - Volts, max. continuous
Volts, transient, 100 mSec
Q48 Models - Volts, max. continuous
Volts, transient, 100 mSec
0-36 VDC
0-50 VDC
0-75 VDC
0-100 VDC
On/Off Control -0.7 V. min to +15V max.
Input Reverse Polarity Protection See Fuse section.
Output Overvoltage Vout nom. +20% max.
Output Current (Note 7) Current-limited. Devices can
withstand sustained short circuit
without damage.
Overtemperature Protection Device includes electronic over-
temperature shutdown protection
under normal operation.
Storage Temperature -55 to +125° C.
Lead Temperature See soldering specifi cations
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 Specifi cations Table is not implied or
recommended.
Absolute Maximum Ratings
CAUTION: This product is not internally fused. To comply with safety agency cer-
tifi cations and to avoid injury to personnel or equipment, the user must supply an
external fast-blow fuse to the input terminals. See fuse information.
1 All Q12 models are tested and specifi ed with external 1µF and 10µF paralleled
ceramic/tantalum output capacitors and a 100µF external input capacitor. Q48
models test with a 35µF input cap. All capacitors are low ESR types. Contact Murata
Power Solutions for details. These capacitors are necessary to accommodate our
test equipment and may not be required to achieve specifi ed performance in your
applications. However, Murata Power Solutions recommends using these capacitors
in your application. All models are stable and regulate within spec under no-load
conditions.
All specifi cations are typical unless noted. General conditions for Specifi cations are
+25° C, Vin=nominal, Vout=nominal, full load. Adequate airfl ow must be supplied
for extended testing under power.
2 Input Ripple Current is tested and specifi ed over a 5 Hz to 20 MHz bandwidth. Input
fi ltering is Cin=33 µF, Cbus=220 µF, Lbus=12 µH.
3 Note that Maximum Power Derating curves indicate an average current at nominal
input voltage. At higher temperatures and/or lower airfl ow, the DC-DC converter will
tolerate brief full current outputs if the total RMS current over time does not exceed
the Derating curve. All Derating curves are presented at sea level altitude. Be aware
that power dissipation degrades as altitude increases.
4a Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method
1, Case 3, ISSUE 2, ground fi xed controlled conditions, Tambient=+25°C, full output
load, natural air convection.
4b Mean Time Before Failure is calculated using MIL-HDBK-217F, GB ground benign,
Tambient=+25°C, full output load, natural air convection.
5 The Remote On/Off Control is normally controlled by a switch or open collector or
open drain transistor. But it may also be driven with external logic or by applying
appropriate external voltages which are referenced to Input Common.
6 Short circuit shutdown begins when the output voltage degrades approximately 2%
from the selected setting.
7 The outputs are not intended to sink appreciable reverse current.
8 Output noise may be further reduced by adding an external fi lter. See I/O Filtering
and Noise Reduction. Larger caps (especially low-ESR ceramic capacitors) may
slow transient response or degrade stability. Use only as much output fi ltering as
needed to achieve your noise requirements and no more. Thoroughly test your
system under full load with all components installed.
9 All models are fully operational and meet published specifi cations, including “cold
start” at –40° C. At full power, the package temperature of all on-board components
must not exceed +128° C.
10 Regulation specifi cations describe the deviation as the line input voltage or output
load current is varied from a nominal midpoint value to either extreme.
11 If the user adjusts the output voltage, accuracy is dependent on user-supplied
trim resistors. To achieve high accuracy, use ±1% or better tolerance metal-fi lm
resistors. If no trim is installed, the converter will achieve its rated accuracy. Do not
exceed maximum power specifi cations when adjusting the output trim.
12 Output current limit and short circuit protection is non-latching. When the overcur-
rent fault is removed, the converter will immediately recover.
13 Alternate pin length and/or other output voltages may be available under special
quantity order.
14 At zero output current, the output may contain low frequency components which
exceed the ripple specifi cation. The output may be operated indefi nitely with no
load.
15 Input Fusing: If the input voltage is reversed, a body diode will conduct consider-
able current. Therefore, install an external protection fuse. To ensure reverse input
protection with full output load, always connect an external input fast-blow fuse in
series with the +Vin input. Use approximately twice the full input current rating at
the selected input voltage.
16 “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a
brief, full-current output. If the overcurrent condition still exists, the restart current
will be removed and then tried again. This short current pulse prevents overheating
and damaging the converter. Once the fault is removed, the converter immediately
recovers normal operation.
17 Note that the converter will operate up to the rated baseplate maximum tempera-
ture with the baseplate installed and properly heat sunk. To avoid thermal self-
protection shutdown, do not exceed this maximum baseplate temperature.
18 UWE-24/3-Q12 undervoltage shutdown of 8.0V is at half load.
19 UWE-24/3-Q12 output overvoltage protection requires 0.3A minimum load.
20 Pre-bias operation: Startup will succeed if the output setpoint voltage is higher than
the pre-existing external output voltage.
SPECIFICATION NOTES
CALCULATED MTBF (TELCORDIA SR-332 METHOD, SEE NOTE 4A)
Model Hours
UWE-3.3/20-Q12 1,248,001
UWE-5/15-Q12 1,847,009
UWE-5/15-Q48 2,273,212
UWE-12/6-Q12 3,755,203
UWE-12/6-Q48 5,750,120
UWE-15/5-Q48 2,386,165
UWE-24/3-Q12 3,294,026
CALCULATED MTBF (MIL-HDBK-217N2 METHOD, SEE NOTE 4B)
UWE-3.3/20-Q12 1,089,141
UWE-5/15-Q12 1,936,627
UWE-5/15-Q48 1,657,518
UWE-12/6-Q12 1,239,521
UWE-12/6-Q48 828,714
UWE-15/5-Q48 2,112,625
UWE-24/3-Q12 2,623,370
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 7 of 23
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PERFORMANCE DATA
Maximum Current Temperature Derating @ sea level
(VIN = 12V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 12V, transverse airfl ow, with baseplate)
UWE-3.3/20-Q12N
UWE-3.3/20-Q12N
UWE-3.3/20-Q12N
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
13
14
15
16
17
18
19
20
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Maximum Current Temperature Derating @sea level
(VIN = 24V, transverse airfl ow, with baseplate)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
13
14
15
16
17
18
19
20
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Effi ciency vs. Line Voltage and Load Current @ 25°C
2 4 6 8 10 12 14 16 18 20
72
74
76
78
80
82
84
86
88
90
92
Vin = 30 V
Vin = 24 V
Vin = 36 V
Vin = 12 V
Vin = 9 V
Load Current (Amps)
Efficiency (%)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
11
12
13
14
15
16
17
18
19
20
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 8 of 23
www.murata-ps.com/support
PERFORMANCE DATA
UWE-3.3/20-Q48P
UWE-3.3/20-Q48P
UWE-3.3/20-Q48P
Maximum Current Temperature Derating @sea level
(VIN = 24V, transverse airfl ow, with baseplate)
15
16
17
18
19
20
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Maximum Current Temperature Derating @sea level
(VIN = 48V, transverse airfl ow, with baseplate)
12
13
14
15
16
17
18
19
20
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Effi ciency vs. Line Voltage and Load Current @ 25°C
50
54
58
62
66
70
74
78
82
86
90
94
2 4 6 8 10 12 14 16 18 20
Vin = 60 V
Vin = 48 V
Vin = 75 V
Vin = 36 V
Vin = 24 V
Vin = 18 V
Load Current (Amps)
Efficiency (%)
Maximum Current Temperature Derating @ sea level
(VIN = 24V, transverse airfl ow, no baseplate)
15
16
17
18
19
20
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Maximum Current Temperature Derating @ sea level
(VIN = 48V, transverse airfl ow, no baseplate)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
14
15
16
17
18
19
20
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 9 of 23
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PERFORMANCE DATA
Maximum Current Temperature Derating @ sea level
(VIN = 12V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 12V, transverse airfl ow, with baseplate)
UWE-5/15-Q12N
UWE-5/15-Q12N
11
11.5
12
12.5
13
13.5
14
14.5
15
15.5
16
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
10
11
12
13
14
15
16
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Effi ciency vs. Line Voltage and Load Current @ 25°C
123456789101112131415
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
Vin = 24 V
Vin = 12 V
Vin = 36 V
Vin = 9 V
Load Current (Amps)
Efficiency (%)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 10 of 23
www.murata-ps.com/support
PERFORMANCE DATA
UWE-5/15-Q48P
UWE-5/15-Q48N
UWE-5/15-Q48N
Maximum Current Temperature Derating @sea level
(VIN = 24V, transverse airfl ow, with baseplate)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
12
12.5
13
13.5
14
14.5
15
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
Maximum Current Temperature Derating @sea level
(VIN = 48V, transverse airfl ow, with baseplate)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
12
12.5
13
13.5
14
14.5
15
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Effi ciency vs. Line Voltage and Load Current @ 25°C
123456789101112131415
60
65
70
75
80
85
90
Vin = 60 V
Vin = 48 V
Vin = 75 V
Vin = 36 V
Vin = 24 V
Vin = 18 V
Load Current (Amps)
Efficiency (%)
Maximum Current Temperature Derating @ sea level
(VIN = 24V, transverse airfl ow, no baseplate)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
11
11.5
12
12.5
13
13.5
14
14.5
15
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
Maximum Current Temperature Derating @ sea level
(VIN = 48V, transverse airfl ow, no baseplate)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
9
10
11
12
13
14
15
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 11 of 23
www.murata-ps.com/support
PERFORMANCE DATA
Maximum Current Temperature Derating @ sea level
(VIN = 12V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 12V, transverse airfl ow, with baseplate)
Effi ciency vs. Line Voltage and Load Current @ 25°C Power Dissipation vs. Load Current @ 25°C
UWE-12/6-Q12N
UWE-12/6-Q12N
1
2
3
4
5
6
6
8
7
0
7
2
7
4
7
6
7
8
8
0
8
2
8
4
8
6
8
8
9
0
9
2
9
4
L
o
a
d
C
u
r
r
e
n
t
(Amps)
t
E
f
fi
f
f
c
i
e
n
c
y (%
)
Vi 24 V
2
Vin = 24 V
Vi
n =
30
V
0
Vin = 10 V
Vin 12 V
Vin=12V
Vin 36 V
3
Vin=36V
Vi 9 V
9
Vin = 9 V
L
o
a
d
C
u
r
r
e
n
t
(Amps)
t
L
oss
(W
atts
)
1
2
3
4
5
6
7
8
9
1
0
1
2
3
4
5
6
Vi 24 V
Vi
n =
24
V
Vi
n =
30
V
0
Vin = 1
0
V
Vin
12
V
Vin
=
12 V
Vin
36
V
Vin
=
36 V
Vi 9 V
Vi
n =
9
V
4.0
4.5
5.0
5.5
6.0
40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
4.0
4.5
5.0
5.5
6.0
40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5+ m/s (300+ LFM)
UWE-12/6-Q48P
Effi ciency vs. Line Voltage and Load Current @ 25°C
123456
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
Vin = 48 V
Vin = 60 V
Vin = 24 V
Vin = 36 V
Vin = 75 V
Vin = 18 V
Load Current (Amps)
Efficiency (%)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 12 of 23
www.murata-ps.com/support
PERFORMANCE DATA
Maximum Current Temperature Derating @ sea level
(VIN = 24V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @ sea level
(VIN = 48V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 24V, transverse airfl ow, with baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 48V, transverse airfl ow, with baseplate)
UWE-12/6-Q48P
UWE-12/6-Q48P
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
4.0
4.5
5.0
5.5
6.0
6.5
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
4.0
4.5
5.0
5.5
6.0
6.5
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
3
3.5
4
4.5
5
5.5
6
6.5
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
4
4.5
5
5.5
6
6.5
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
UWE-15/5-Q12P
Effi ciency vs. Line Voltage and Load Current @ 25°C
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Vin = 24 V
Vin = 12 V
Vin = 36 V
Vin = 9 V
Load Current (Amps)
Efficiency (%)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 13 of 23
www.murata-ps.com/support
PERFORMANCE DATA
Maximum Current Temperature Derating @ sea level
(VIN = 12V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @ sea level
(VIN = 24V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 12V, transverse airfl ow, with baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 24V, transverse airfl ow, with baseplate)
UWE-15/5-Q12N
UWE-15/5-Q12N
3
3.5
4
4.5
5
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
3
3.5
4
4.5
5
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
3
3.5
4
4.5
5
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
3
3.5
4
4.5
5
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
UWE-15/5-Q48
Effi ciency vs. Line Voltage and Load Current @ 25°C
12345
68
70
72
74
76
78
80
82
84
86
88
90
92
94
Load Current (Amps)
Efficiency (%)
Vin = 18V
Vin = 24V
Vin = 36V
Vin = 48V
Vin = 60V
Vin = 75V
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 14 of 23
www.murata-ps.com/support
PERFORMANCE DATA
Power Dissipation vs. Load Current @ 25°C
Maximum Current Temperature Derating @ sea level
(Vin = 48V, air fl ow from Pin 1 to Pin 3 on PCB, with Baseplate)
Maximum Current Temperature Derating @ sea level
(Vin = 48V, air fl ow from Pin 1 to Pin 3 on PCB, no baseplate)
Maximum Current Temperature Derating @sea level
(Vin = 24V, air fl ow from Pin 1 to Pin 3 on PCB, with Baseplate)
Maximum Current Temperature Derating @sea level
(Vin = 60V, air fl ow from Pin 1 to Pin 3 on PCB, with Baseplate)
Maximum Current Temperature Derating @sea level
(Vin = 60V, air fl ow from Pin 1 to Pin 3 on PCB, no baseplate)
UWE-15/5-Q48
UWE-15/5-Q48
UWE-15/5-Q48
2
3
4
5
6
30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (°C)
Output Current (Amps)
Ambient Temperature (°C)
Output Current (Amps)
0.33 m/s (65 LFM)
0.5 to 2.0 m/s (100 to 400 LFM)
2
3
4
5
6
30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (°C)
Output Current (Amps)
Ambient Temperature (°C)
Output Current (Amps)
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 to 2.0 m/s (300 to 400 LFM)
2
3
4
5
6
30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (
°
C)
Output Current (Amps)
0.33 to 2.0 m/s (65 to 400 LFM)
2
3
4
5
6
30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (°C)
Output Current (Amps)
Ambient Temperature (°C)
Output Current (Amps)
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 to 2.0 m/s (200 to 400 LFM)
2
3
4
5
6
30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (°C)
Output Current (Amps)
Ambient Temperature (°C)
Output Current (Amps)
0.33 m/s (65 LFM)
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 to 2.0 m/s (300 to 400 LFM)
1
2
3
4
5
6
7
8
9
10
11
12345
Load Current (Amps)
Loss (Watts)
Vin = 18V
Vin = 24V
Vin = 36V
Vin = 48V
Vin = 60V
Vin = 75V
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 15 of 23
www.murata-ps.com/support
PERFORMANCE DATA
Maximum Current Temperature Derating @ sea level
(VIN = 12V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @ sea level
(VIN = 24V, transverse airfl ow, no baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 12V, transverse airfl ow, with baseplate)
Maximum Current Temperature Derating @sea level
(VIN = 24V, transverse airfl ow, with baseplate)
Effi ciency vs. Line Voltage and Load Current @ 25°C Power Dissipation vs. Load Current @ 25°C
UWE-24/3-Q12P
UWE-24/3-Q12P
UWE-24/3-Q12N
L
o
a
d
C
u
r
r
e
n
t
(Amps)
t
E
f
fi
f
f
c
i
e
n
c
y (%)
6
5
6
7
6
9
7
1
7
3
7
5
7
7
7
9
8
1
8
3
8
5
8
7
8
9
9
1
9
3
9
5
0
.
5
1
1
.
5
2
2
.
5
3
Vi 24 V
Vin = 24 V
Vin = 30 V
0
Vin = 10 V
Vin 12 V
n
Vin=12V
Vin 36 V
n
Vin=36V
Vi 9 V
Vin = 9 V
2
3
4
5
6
7
8
9
1
0
1
1
1
2
0
.
5
1
1
.
5
2
2
.
5
3
L
o
a
d
C
u
r
r
e
n
t
(Amps)
t
L
oss
(W
atts
)
Vi 24 V
Vi
n =
24
V
V
in =
30
V
0
V
in = 1
0
V
Vin
12
V
Vin
=
12 V
Vin
36
V
Vin
=
36 V
Vi 9 V
Vi
n =
9
V
2.40
2.50
2.60
2.70
2.80
2.90
3.00
3.10
3.20
40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2
2.2
2.4
2.6
2.8
3
3.2
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
1.8
2.2
2.4
2.6
2.8
3.2
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.40
2.60
2.80
3.00
3.20
40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (°C)
Output Current (Amps)
Natural Convection
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 16 of 23
www.murata-ps.com/support
MECHANICAL SPECIFICATIONS—NO BASEPLATE
TOP VIEW
2.30
(58.4)
0.90 (22.9)
BOTTOM VIEW
PIN 3
PIN 2
PIN 1
PIN 4
PIN 8
PIN 7
PIN 6
PIN 5
2.000
(50.80)
0.15 (3.8)
ISOMETRIC
VIEW
MATERIAL:
.040 PINS: C26000 BRASS, 3/4 HARD
.062 PINS: C10200 COPPER ALLOY, FULL HARD
FINISH: (ALL PINS)
GOLD (5 MICROINCHES MIN) OVER NICKEL (50 MICROINCHES MIN)
0.45
(11.43)
0.600
(15.24)
0.300
(7.62)
0.150 (3.81)
0.150 (3.81)
0.600
(15.24)
REF
0.071 (1.8)±.002 STANDOFF
AT EACH 0.040 (1.02) PIN
0.19 (4.83)
0.010 (0.254) MIN
(HIGHEST COMP
TO MTG PLANE)
MTG PLANE
END VIEW
0.39
(9.91)
0.125
(3.175)
REF
SIDE VIEW
AT PINS 4 & 8
AT PINS 1-3, 5-7
(1.02) ±.0020.040
0.062 (1.57) ±.002
0.126 (3.17)
Third Angle Projection
Dimensions are in inches (mm) shown for ref. only.
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
* The Remote On/Off can be provided
with either positive (P suffi x) or nega-
tive (N suffi x) logic.
Connect each sense input to its
respective Vout if sense is not con-
nected at a remote load.
DOSA-Compatible
I/O Connections
Pin Function
1 +Vin
2 On/Off Control*
3 –Vin
4 –Vout
5 –Sense
6 Trim
7 +Sense
8 +Vout
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 17 of 23
www.murata-ps.com/support
MECHANICAL SPECIFICATIONS (continued)—BASEPLATE INSTALLED
0.45
(11.43)
TOP VIEW
0.14 (3.6)
2.30
(58.4)
0.90 (22.9)
1.500
(38.10)
0.40
(10.2)
0.625 (15.88)
M2X0.4 - 6H
.10" MAX SCREW
PENETRATION
4X THRU
ISOMETRIC
VIEW
BOTTOM VIEW
PIN 3
PIN 2
PIN 1
PIN 4
PIN 8
PIN 7
PIN 6
PIN 5
0.600
(15.24)
0.300
(7.62)
0.150 (3.81)
0.150 (3.81)
2.000
(50.80)
0.600
(15.24)
REF
0.15 (3.8)
MATERIAL:
.040 PINS: C26000 BRASS, 3/4 HARD
.062 PINS: C10200 COPPER ALLOY, FULL HARD
FINISH: (ALL PINS)
GOLD (5 MICROINCHES MIN) OVER NICKEL (50 MICROINCHES MIN)
(HIGHEST COMP
TO MTG PLANE)
SIDE VIEW
ALUMINUM
BASEPLATE
MTG PLANE
END VIEW
0.50
(12.8)
MAX
0.071 (1.8)±.002 STANDOFF
AT EACH 0.040 (1.02) PIN
0.19 (4.83)
0.010 (0.254) MIN
0.125
(3.175)
REF
AT PINS 4 & 8
AT PINS 1-3, 5-7
(1.02) ±.0020.040
0.062 (1.57) ±.002
Third Angle Projection
Dimensions are in inches (mm) shown for ref. only.
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 18 of 23
www.murata-ps.com/support
SHIPPING TRAYS AND BOXES
SHIPPING TRAY
UWE modules are supplied in a 21-piece (3-by-7) shipping tray. The tray is an anti-static closed-cell polyethylene foam. Dimensions are shown below.
Anti-static foam
Label Label
For 1–42 pc quantity For 43–84 pc quantity
7.800
(198.1)
1.06
(26.9)
2.400 (61) TYP
9.920
(252)
0.625 (15.9) TYP
-0.062
+0.000
1.300 (33.0) TYP 0.25 CHAMFER TYP (4-PL)
Dimensions in inches (mm)
0.25 R TYP
9.920
(252) +0.000
-0.062
0.735 (18.7)
0.455 (11.6) TYP
0.910 (23.1) TYP
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 19 of 23
www.murata-ps.com/support
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 exist. For MPS UWE DC-DC Converters, you should use fast-blow type
fuses, installed in the ungrounded input supply line. Refer to the specifi cations
for fuse values.
All relevant national and international safety standards and regulations must
be observed by the installer. For system safety agency approvals, the convert-
ers must be installed in compliance with the requirements of the end-use
safety standard, e.g., IEC/EN/UL60950-1.
Input Undervoltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate 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
Undervoltage 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 interval of time 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 specifi ed accuracy band. Actual
measured times will vary with input source impedance, external input/output
capacitance, and load. The UWE Series implements a soft start circuit that
limits 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
specifi cation defi nes the interval between the point at which the converter is
turned on and the fully loaded output voltage enters and remains within its
specifi ed 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 insignifi cant.
Input Source Impedance
UWE converters must be driven from a low ac-impedance input source.
The DC-DC’s performance and stability can be compromised by the use of
highly inductive source impedances. For optimum performance, compo-
nents should be mounted close to the DC-DC converter. If the application
has a high source impedance, low VIN models can benefit from increased
external input capacitance.
I/O Filtering, Input Ripple Current, and Output Noise
All models in the UWE Converters are tested/specifi ed for input refl ected ripple
current and output noise using the specifi ed external input/output components/
circuits and layout as shown in the following two fi gures.
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
specifi c system confi guration may necessitate additional considerations.
CINVIN CBUS
LBUS
CIN = 33µF, ESR < 700mΩ @ 100kHz
CBUS = 220µF, ESR < 100mΩ @ 100kHz
LBUS = 12µH
+VIN
–VIN
CURRENT
PROBE
TO
OSCILLOSCOPE
+
–
Figure 2. Measuring Input Ripple Current
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing these
converters. These specifi cations vary depending on the solder type. Exceeding these
specifi cations may cause damage to the product. Your production environment may dif-
fer; 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
In critical applications, output ripple/noise (also referred to as periodic and
random deviations or PARD) may be reduced below specifi ed limits using fi lter-
ing techniques, the simplest of which is the installation of additional external
output capacitors. These output caps function as true fi lter 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.
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 20 of 23
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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 voltages to begin ramping to their
appropriate values. 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 UWE is capable of enduring
an indefi nite short circuit output condition.
Features and Options
On/Off Control
The input-side, remote On/Off Control function can be ordered to operate with
either logic type:
Positive-logic models (“P" part-number suffi x) are enabled when the On/Off
Control is left open or is pulled high, as per Figure 4. Positive-logic devices are
disabled when the On/Off Control is pulled low.
Negative-logic devices (“N” suffi x) are off when the On/Off Control is open (or
pulled high), and on when the On/Off Control is pulled low with respect to –VIN
as shown in Figure 5.
Floating Outputs
Since these are isolated DC-DC converters, their outputs are "fl oating" 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
UWE converters employ a synchronous-rectifi er 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
These UWE converters are equipped with thermal-shutdown circuitry. If envi-
ronmental conditions cause the internal 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 Specifi cations.
Output Overvoltage Protection
UWE output voltages are monitored for an overvoltage condition via magnetic
feedback. The signal is 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 voltages to decrease. Fol-
lowing a time-out period the PWM will restart, causing the output voltages to
ramp to their appropriate values. If the fault condition persists, and the output
voltages again climb to excessive levels, the overvoltage 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 substantially above 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 defi ned as the point at
which the full-power output voltage falls below the specifi ed tolerance. See
Performance/Functional Specifi cations. If the load current, being drawn from
the converter, is signifi cant enough, the unit will go into a short circuit condition
as specifi ed under "Performance."
C1
C1 = 0.47μF CERAMIC
C2 = NA
LOAD 2-3 INCHES (51-76mm) FROM MODULE
C2 R
LOAD
SCOPE
+VOUT
–VOUT
+SENSE
–SENSE
Figure 3. Measuring Output Ripple/Noise (PARD)
ON/OFF CONTROL
CONTROL
+ Vcc
-VIN
Figure 4. Driving the Positive Logic On/Off Control Pin
–VIN
O N /O F F
C O N TR O L
+ Vcc
Figure 5. Driving the Negative Logic On/Off Control Pin
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 21 of 23
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Dynamic control of the remote on/off function is facilitated with a mechanical
relay or an open-collector/open-drain drive circuit (optically isolated if appropri-
ate). The drive circuit should be able to sink appropriate current (see Performance
Specs) when activated and withstand appropriate voltage when deactivated.
Applying an external voltage to the On/Off Control when no input power is
applied to the converter can cause permanent damage to the converter.
Trimming Output Voltage
UWE converters have a trim capability that allows users to adjust the output
voltages. Adjustments to the output voltages can be accomplished via a trim pot
(Figure 6) or a single fi xed resistor as shown in Figures 7 and 8. A single fi xed
resistor can increase or decrease the output voltage depending on its connec-
tion. The resistor should be located close to the converter and have a TCR less
than 100ppm/°C to minimize sensitivity to changes in temperature. If the trim
function is not used, leave the trim pin fl oating.
A single resistor connected from the Trim to the +Output, or +Sense where
applicable, will increase the output voltage in this confi guration. A resistor con-
nected from the Trim to the –Output, or –Sense where applicable, will decrease
the output voltage in this confi guration.
Trim adjustments greater than the specifi ed range can have an adverse
affect on the converter's performance and are not recommended. Excessive
voltage differences between VOUT and Sense, in conjunction with trim adjust-
ment of the output voltage, can cause the overvoltage protection circuitry to
activate (see Performance Specifi cations for overvoltage 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 specifi ed rating or
cause output voltages to climb into the output overvoltage region. Therefore:
(VOUT at pins) x (IOUT) <= rated output power
Note: Resistor values are in k. Adjustment accuracy is subject to resistor
tolerances and factory-adjusted output accuracy. VO = desired output voltage.
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.
UWE series converters have a sense feature to provide point of use regula-
tion, 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 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. In cables and discrete
wiring applications, twisted pair or other techniques should be implemented.
LOAD
R2
+VOUT
+VIN
–VIN
ON/OFF
CONTROL TRIM
+SENSE
–VOUT
–SENSE
Figure 8. Trim Connections To Decrease Output Voltages
1M
5-20
TURNS
LOAD
+VOUT
+VIN
–VIN
ON/OFF
CONTROL TRIM
+SENSE
–VOUT
–SENSE
Figure 6. Trim Connections Using A Trimpot
LOAD
R1
+VOUT
+VIN
–VIN
ON/OFF
CONTROL TRIM
+SENSE
–VOUT
–SENSE
Figure 7. Trim Connections To Increase Output Voltages Using a Fixed Resistor
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 22 of 23
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UWE series converters will compensate for drops between the output volt-
age at the DC-DC and the sense voltage at the DC-DC provided that:
[VOUT(+) –VOUT(–)] –[Sense(+) –Sense (–)] 5% VOUT
Output overvoltage 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
overvoltage protection circuitry to activate (see Performance Specifi cations
for overvoltage 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
UWE’s specifi ed rating or cause output voltages to climb into the output over-
voltage region. Also, the use of Trim Up and Sense combined may not exceed
+10% of VOUT. Therefore, the designer must ensure:
(VOUT at pins) x (IOUT) rated output power
UP VO– 3.3
RT (k ) = –10.2
13.3(VO– 1.226)
3.3 – VO
RT (k ) = –10.2
16.31
DOWN
3.3 Volt Output
UP VO– 5
RT (k ) = –10.2
20.4(VO– 1.226)
5– VO
RT (k ) = –10.2
25.01
DOWN
5 Volt Output
UP VO– 12
RT (k ) = –10.2
49.6(VO– 1.226)
UP VO– 15
RT (k ) = –10.2
62.9(VO– 1.226)
12 – VO
RT (k ) = –10.2
60.45
DOWN
15 – VO
RT (k ) = –10.2
76.56
DOWN
12 Volt Output
15 Volt Output
UP VO– 24
RT (k ) = –10.2
101(VO– 1.226)
24 – VO
RT (k ) = –10.2
124.2
DOWN
24 Volt Output
Trim Equations
Trim Up Trim Down
LOAD
+VOUT
+VIN
Sense Current
Contact and PCB resistance
losses due to IR drops
Contact and PCB resistance
losses due to IR drops
Sense Return
–VIN
ON/OFF
CONTROL TRIM
+SENSE
–VOUT
–SENSE
IOUT Return
IOUT
Figure 9. Remote Sense Circuit Confi guration
UWE Series
Wide Input, Isolated
Eighth-Brick DC-DC Converters
MDC_UWE Series.E04 Page 23 of 23
www.murata-ps.com/support
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without
notice. © 2015 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, 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/
Figure 10. Vertical Wind Tunnel
IR Video
Camera
IR Transparent
optical window Variable
speed fan
Heating
element
Ambient
temperature
sensor
Airflow
collimator
Precision
low-rate
anemometer
3” below UUT
Unit under
test (UUT)
Vertical Wind Tunnel
Murata Power Solutions employs a computer controlled
custom-designed closed loop vertical wind tunnel, infrared
video camera system, and test instrumentation for accurate
airfl ow and heat dissipation analysis of power products.
The system includes a precision low fl ow-rate anemometer,
variable speed fan, power supply input and load controls,
temperature gauges, and adjustable heating element.
The IR camera monitors the thermal performance of the
Unit Under Test (UUT) under static steady-state conditions. A
special optical port is used which is transparent to infrared
wavelengths.
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 trans-
verse airfl ow studies are possible by rotation of this carrier
board since there are often signifi cant differences in the heat
dissipation in the two airfl ow directions. The combination of
adjustable airfl ow, 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 airfl ow turbulence. Such turbu-
lence infl uences 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.
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.
