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 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,
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
Typical unit
FEATURES
nꢀ
Industry-standard through-hole eighth-brick
package with 0.9" x 2.3" x 0.36" outline
dimensions
CPU cards and instrument subsystems. The extend- for line drop errors at high output currents. Outputs
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.
are trimmable within 10ꢀ of nominal voltage. The
UWE series are functionally complete.
nꢀ
Choice of two wide input ranges, 9 - 36 Vdc or
18-75 Vdc
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.
nꢀ
Fixed output from 3.3 to 24 Volts DC up to
75 Watts
The synchronous rectifier design uses the
nꢀ
Synchronous rectification yields very high
efficiency and low power dissipation
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,
nꢀ
Operating temperature range from -40 to
+85˚C. with derating
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Up to 1500 Volt DC isolation (basic insulation)
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Outstanding thermal performance and
derating
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Extensive self-protection, overtemperature and
overload features with no output reverse
conduction
+VOUT
+VIN
SWITCH
DRIVE
nꢀ
On/Off control, trim and remote sense functions
VOLTAGE
REGULATOR
nꢀ
Designed to meet UL/EN/IEC 60950-1, CAN/
CSA-C22.2 No. 60950-1 safety approvals
and FCC RFI/EMI certification
+SENSE
nꢀ
−VOUT
Pre-bias operation for startup protection
SS
PWM
–VIN
−SENSE
ON/OFF
CONTROL
REFERENCE
AMPLIFIER,
TRIM AND FEEDBACK
ISOLATION
TRIM
UV, OT
Typical topology is shown.
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
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