UWE Series
Wide Input, Isolated
Eighth-Brick DC/DC Converters
The UWE Series "Eighth-Brick" DC/DC Converters are high-current isolated
power modules designed for use in high-density system boards.
PRODUCT OVERVIEW
Typical unit
FEATURES
n
Industry-standard through-hole eighth-brick
package with 0.9" x 2.3" x 0.36" outline
dimensions
n
Choice of two wide input ranges, 9 - 36 Vdc or
18-75 Vdc
n
output from 3.3 to 24 Volts DC up to
Fixed
75 Watts
n
Synchronous rectification yields very high
efficiency and low power dissipation
n
Operating temperature range from -40 to
+85˚C. with derating
n
to 1500 Volt DC isolation (basic insulation)
Up
n
Outstanding thermal performance and
derating
n
Extensive self-protection, overtemperature and
overload features with no output reverse
conduction
n
On/Off control, trim and remote sense functions
n
Designed to meet UL/EN/IEC 60950-1, CAN/
CSA-C22.2 No. 60950-1 safety approvals
and FCC RFI/EMI certification
n
Pre-bias operation for startup protection
With dimensions of only 0.9 by 2.3 by 0.36
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 fixed-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 efficiency means no fans or temperature
deratings in many applications. An optional thermal
mounting baseplate extends operation into most
conceivable environments.
The synchronous rectifier design uses the
maximum available duty cycle for greatest ef-
ficiency 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 1500 Volts assures safety and fully
differential (floating) operation for greatest applica-
tion flexibility. On-board Sense inputs 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 designed to meet all standard
safety and EMI/RFI certifications. All units meet
RoHS-6 (no lead) hazardous materials compliance.
+V
IN
SWITCH
DRIVE
+V
OUT
VOLTAGE
REGULATOR
+SENSE
–V
IN
SS
PWM
−V
OUT
−SENSE
ON/OFF
CONTROL
ISOLATION
UV, OT
REFERENCE
AMPLIFIER,
TRIM AND FEEDBACK
Typical topology is shown.
TRIM
Simplified Block Diagram
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_UWE Series.A11
Page 1 of 12
UWE Series
Wide Input, Isolated
Eighth-Brick DC/DC Converters
SPECIFICATION SUMMARY AND ORDERING GUIDE
Output
V
out
(V)
3.3
3.3
5.0
5.0
12.0
12.0
24.0
Input
Regulation (max.)
Line
±0.25%
Load
±0.25%
Efficiency
Root Model
UWE-3.3/20-Q12P-C
UWE-3.3/20-Q48N-C
UWE-5/15-Q12P-C
UWE-5/15-Q48N-C
UWE-12/6-Q12P-C
UWE-12/6-Q48N-C
UWE-24/3-Q12P-C
I
out
(A)
20
20
15
15
6
6
3
Power
(W)
66
66
75
75
72
72
72
R/N (mVp-p)
➂
Typ.
Max.
V
in
Nom. Range
(V)
(V)
I
in
,
no
load
(mA)
I
in
,
full
load
(A)
Min.
Typ.
Package
(Case, Pinout)
80
125
12
9-36
160
6.18
87%
89%
Please contact Murata Power Solutions for further information.
C77, P32
120
190
180
275
±0.125%
±0.125%
±0.05%
±0.125%
12
12
9-36
9-36
75
110
6.56
6.70
90%
88.3%
91.5%
89.5%
Please contact Murata Power Solutions for further information.
Please refer to the part number structure for additonal ordering model numbers and options.
All specifications are at nominal line voltage, nominal output voltage and full load, +25° C.
Output capacitors are 1 µF ceramic || 10 µF electrolytic. Input cap is 100 µF. All caps are low
ESR types. Contact Murata Power Solutions for details.
unless otherwise noted. See detailed specifications.
I/O caps are necessary for our test equipment and may not be needed for your application.
Load range: 0.1-3A. This is required only for our test equipment. The converter will operate at
zero output current.
PART NUMBER STRUCTURE
U W E
-
12
/
6
-
Q12 P B
-
C
Unipolar, Single-output
Wide Input Range
Eighth-Brick Package
RoHS Hazardous Materials Compliance
C=RoHS-6, standard
Baseplate (optional)
Blank = No baseplate (standard)
B = Baseplate installed (optional special order)
On/Off Control Polarity
P = Positive polarity (standard for Q12 models)
N = Negative polarity (optional special order for Q12 models)
Input Voltage Range
Q12 = 9-36 Volts
Q48 = 18-75 Volts
Nominal Output Voltage
Maximum Rated Output
Current in Amps
Note:
Some model number combinations may
not be available. Contact Murata Power
Solutions for further information.
DETAIL SPECIFICATIONS, Q12 MODELS
UWE-3.3/20-Q12
Specs are typical unless noted.
INPUT
Input voltage range
Start-up threshold, Volts
Undervoltage shutdown, V.
Overvoltage shutdown, V.
Reflected (back) ripple current, mA pk-pk
Suggested external fuse, A
Input current
Full load conditions
Inrush transient, A sec
2
uWE-5/15-Q12
UWE-12/6-Q12
UWE-24/3-Q12
18
See ordering guide
9.5
8.5
none
25
25
See ordering guide
0.1 A sec
2
9
8
40
20
See ordering guide
0.1 A
2
sec
250
75
8.89
5
250
110
9.04
5
40
20
Input current if output is in short circuit, mA
No load, mA
Low line (Vin=min.), Amps
Standby mode, mA
250
160
8.33
8
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Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_UWE Series.A11
Page 2 of 12
UWE Series
Wide Input, Isolated
Eighth-Brick DC/DC Converters
DETAIL SPECIFICATIONS, CONTIUED
INPUT
(continued)
(Off, UV, OT shutdown)
Internal input filter type
Reverse polarity protection
Remote On/Off control
Positive logic ("P" model suffix)
Negative logic ("N" model suffix)
Current, mA
OUTPUT
Voltage output range
Voltage output accuracy
Adjustment range
Temperature coefficient
Minimum loading
Remote sense compensation
Ripple/noise (20 MHz bandwidth)
Line/Load regulation
Efficiency
Maximum capacitive loading, μF
low ESR <0.02Ω max., resistive load
Isolation voltage
Input to Output, Volts min. DC
Input to baseplate, Volts min. DC
Baseplate to output, Volts min. DC
Isolation resistance, MΩ
Isolation capacitance, pF
Isolation safety rating
Current limit inception (98% of
Vout, after warmup), Amps
Short circuit protection method
Short circuit current, Amps
Short circuit duration
Overvoltage protection, Volts
(via magnetic feedback)
DYNAMIC CHARACTERISTICS
Dynamic load response, μSec
(50-75-50% load step) to ±1%
of final value
Start-up time
Vin to Vout regulated, mSec
Remote On/Off to Vout regulated, mSec
Switching frequency, KHz
20
5
245±25
40
30
275 ±25
40
30
215 ±15
50
4.5
0.5
27
1500
Basic insulation
8.5
Current limiting, hiccup autorestart. Remove overload for recovery.
1.5
Continuous, output shorted to ground. No damage.
15
29
1.0
4.0
1500
1500
750
100
1000
1000
10,000
See ordering guide
±1% of Vnom., (50% load)
-10 to +10% of Vnom.
±0.02% of Vout range per °C
No minimum load
+10% max.
See ordering guide
See ordering guide
See ordering guide
4,700
1500
OFF=Ground pin to +0.8V max.
ON=open pin or +3.5 to +Vin max.
OFF=open pin or +5V to +Vin max.
ON=Ground pin or 0 to +0.8V max.
1
Yes
UWE-3.3/20-Q12
uWE-5/15-Q12
L-C
Yes
UWE-12/6-Q12
UWE-24/3-Q12
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_UWE Series.A11
Page 3 of 12
UWE Series
Wide Input, Isolated
Eighth-Brick DC/DC Converters
DETAIL SPECIFICATIONS, CONTIUED
ENVIRONMENTAL
Calculated MTBF (Telcordia SR-332)
Calculated MTBF (MIL-HDBK-217N2)
Operating temperature range
with derating, °C (see Derating curves)
Storage temperature range, °C
Thermal protection/shutdown, °C
Relative humidity
PHYSICAL
Outline dimensions
Pin material
Pin Finish
Pin diameter, inches
Pin diameter, mm
Weight, ounces
Weight, grams
Electromagnetic interference (conducted)
Safety
See mechanical specs
Copper alloy
Nickel underplate with gold overplate (see mechanical specs for details)
0.04/0.062
1.016/1.575
0.7
20
Designed to meet FCC part 15, class B, EN55022 conducted and CISPR22 class B conducted.
Designed to meet UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1
UWE-3.3/20-Q12
uWE-5/15-Q12
UWE-12/6-Q12
UWE-24/3-Q12
3,755,203 hours (UWE-12/6-Q12N-C)
1,248,001 hours (UWE-3.3/20-Q12)
1,239,521 hours (UWE-12/6-Q12N-C)
1,089,141 hours (UWE-3.3/20-Q12)
-40 to +85 with derating
-55 to +125
+120
to +85°C/85% non-condensing
SPECIFICATION NOTES
CAUTION: This product is not internally fused. To comply with safety agency cer-
tifications and to avoid injury to personnel or equipment, the user must supply an
external fast-blow fuse to the input terminals. See fuse information.
All models are tested and specified with external 1µF and 10µF paralleled ceramic/
tantalum output capacitors and a 100 µF external input capacitor. 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
specified 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 specifications are typical unless noted. General conditions for Specifications are
+25° C, Vin=nominal, Vout=nominal, full load. Adequate airflow must be supplied
for extended testing under power.
Input Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input
filtering is Cin=33 µF, Cbus=220 µF, Lbus=12 µH.
Note that Maximum Power Derating curves indicate an average current at nominal
input voltage. At higher temperatures and/or lower airflow, 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.
Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Issue
1, Case 3, Fits 266, ground fixed conditions, Tambient = +30° C, full output load,
natural air convection.
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.
Short circuit shutdown begins when the output voltage degrades approximately 2%
from the selected setting.
The outputs are not intended to sink appreciable reverse current.
Output noise may be further reduced by adding an external filter. 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 filtering 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 specifications, including “cold
start” at –40° C. At full power, the package temperature of all on-board components
must not exceed +128° C.
10 Regulation specifications 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-film
resistors. If no trim is installed, the converter will achieve its rated accuracy. Do not
exceed maximum power specifications 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 specification. The output may be operated indefinitely with no
load.
15 Input Fusing: To ensure reverse input protection with full output load, always con-
nect an external input fast-blow
fuse
in series with the +Vin input. Use approxi-
mately 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.
1
2
3
4
5
6
7
8
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_UWE Series.A11
Page 4 of 12
UWE Series
Wide Input, Isolated
Eighth-Brick DC/DC Converters
MECHANICAL SPECIFICATIONS—NO BASEPLATE
2.30
(58.4)
TOP VIEW
0.90 (22.9)
ISOMETRIC
VIEW
.071±.002 STANDOFF
.040 PIN
AT EACH
SIDE VIEW
0.21 (5.3) @
.062 PINS
END VIEW
0.38 (9.7)
MAX
MOUNTING PLANE
0.19 (4.8) @
.040 PINS
.040±.002
AT PINS 1-3, 5-7
.062±.002
AT PINS 4 & 8
I/O CONNECTIONS
Pin
1
2
Function
- Vin
On/Off Control *
+Vin
- Vout
- Sense
Trim
+ Sense
+ Vout
0.15 (3.8)
PIN 1
2.000
(50.8)
PIN 4
3
4
5
6
7
8
BOTTOM VIEW
.300 .45
PIN 5
.600
.150
.150
.600
REF
* The Remote On/Off can
be provided with either
positive (P suffix) or negative
(N suffix) polarity
Connect each sense input to its
respective Vout if sense is not
connected at a remote load.
PIN 2
PIN 3
MATERIAL:
.040 PINS: C26000 BRASS, 3/4 HARD
.062 PINS: C10200 COPPER ALLOY, FULL HARD
PIN 6
PIN 7
PIN 8
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
FINISH: (ALL PINS)
GOLD (5 MICROINCHES MIN) OVER NICKEL (50 MICROINCHES MIN)
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_UWE Series.A11
Page 5 of 12
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