MURATA UWE Technical data
Typical unit
+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
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
Fixed output from 3.3 to 24 Volts DC up to
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
Up to 1500 Volt DC isolation using Basic insulation
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
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
With dimensions of only 0.9 by 2.3 by 0.36
inches, the UWE series open frame DC/DC converters 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 extended 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 efficiency and low power dissipation with no reverse
output conduction. Other features include low
on-resistance FET’s, planar magnetics and heavycopper 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 ISOtraceable manufacturing quality standards.
Isolation of 1500 Volts assures safety and fully
differential (floating) operation for greatest application 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 feature 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 certification.
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
Simplified Block Diagram
MDC_UWE Series.A06 Page 1 of 12
UWE Series
18
Wide Input, Isolated
Eighth-Brick DC/DC Converters
SPECIFICATION SUMMARY AND ORDERING GUIDE
Vo u t
Root Model
UWE-3.3/20-Q12P-C 3.3 20
UWE-5/15-Q12P-C 5.0 15 C77, P32
UWE-12/6-Q12P-C 12.0 6 72 120 180 ±0.125% ±0.05% 12 9-36 75 6.56 90% 91.5% C77, P32
UWE-24/3-Q12P-C 24.0 3 72
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.
unless otherwise noted. See detailed specifications.
Output capacitors are 1 µF ceramic || 10 µF electrolytic. Input cap is 100 µF.
(V)
Io u t
(A)
Output Input
R/N (mVp-p) ➂ Regulation
Power
(W)
Please contact Murata Power Solutions for further information.
Iin , no
Vin Nom.
(V)
Range
(V)
load
(mA)
Iin , full
load
(A) Min. Typ.Typ. Max. Line Load
Please contact Murata Power Solutions for further information.
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.
Efficiency
(Case, Pinout)
PART NUMBER STRUCTURE
/
6 P B
Q12-12
-
C
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
Note:
Some model number combinations may
not be available. Contact Murata Power
Solutions for further information.
Unipolar, Single-output
Wide Input Range
Eighth-Brick Package
Nominal Output Voltage
U E -
W
Maximum Rated Output
Current in Amps
Package
C77, P32
C77, P32
DETAIL SPECIFICATIONS
UWE-3.3/20-Q12 uWE-5/15-Q12 UWE-12/6-Q12 UWE-24/3-Q12
Specs are typical unless noted.
INPUT
Input voltage range See ordering guide
Start-up threshold, Volts 9
Undervoltage shutdown, V. 8
Overvoltage shutdown, V. none
Reflected (back) ripple current, mA pk-pk 40
Suggested external fuse, A 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
No load, mA 75
Low line (Vin=min.), Amps 8.89
Standby mode, mA 5
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000www.murata-ps.com
MDC_UWE Series.A06 Page 2 of 12
Eighth-Brick DC/DC Converters
DETAIL SPECIFICATIONS, CONTIUED
INPUT (continued) UWE-3.3/20-Q12 uWE-5/15-Q12 UWE-12/6-Q12 UWE-24/3-Q12
(Off, UV, OT shutdown)
Internal input filter type
Reverse polarity protection See notes
Recommended external fuse, Amps 20
Remote On/Off control
Positive logic ("P" model suffix)
Negative logic ("N" model suffix)
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 coef ficient ±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
Efficiency See ordering guide
Maximum capacitive loading, μF
low ESR <0.02Ω max., resistive load
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 1000
Isolation safety rating Basic insulation
Current limit inception (98% of
Vout, af ter warmup), Amps
Short circuit protection method Current limiting, hiccup autorestart. Remove overload for recovery.
Short circuit current, Amps 1.5
Short circuit duration Continuous, output shorted to ground. No damage.
Overvoltage protection, Volts
(via magnetic feedback)
DYNAMIC CHAR ACTERISTICS
Dynamic load response, μSec
(50-75-50% load step) to ±1%
of final value
Start-up time
Vin to Vout regulated, mSec 40
Remote On/Off to Vout regulated, mSec 30
Switching frequency, KHz 275 ±25
ENVIRONMENTAL
Calculated MTBF (Telcordia SR-332) 3,755,203 hours (UWE-12/6-Q12N-C)
Calculated MTBF (MIL-HDBK-217N2) 1,239,521 hours (UWE-12/6-Q12N-C)
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.
L-C
4,700
8.5
15
50
UWE Series
Wide Input, Isolated
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000www.murata-ps.com
MDC_UWE Series.A06 Page 3 of 12
Eighth-Brick DC/DC Converters
DETAIL SPECIFICATIONS, CONTIUED
ENVIRONMENTAL (continued) UWE-3.3/20-Q12 uWE-5/15-Q12 UWE-12/6-Q12 UWE-24/3-Q12
Operating temperature range
with derating, °C (see Derating cur ves)
Storage temperature range, °C -55 to +125
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
Pin diameter, inches 0.04/0.062
Pin diameter, mm 1.016/1.575
Weight, ounces 0.67 0.7 0.7 0.7
Weight, grams 19 20 20 20
Electromagnetic interference (conducted and
radiated, external filter required)
Safety Designed to meet UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1
-40 to +85 with derating
FCC part 15, class B, EN55022
UWE Series
Wide Input, Isolated
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.
1 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. 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.
2 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.
3 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.
4 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.
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 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 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.
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000www.murata-ps.com
MDC_UWE Series.A06 Page 4 of 12
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