Datasheet
Figure 1. Simplifi ed Schematic
* "D24" models only
FEATURES
The migration to distributed power is accelerating.
The critical need for accurate voltages, tight regu-
lation and rapid transient response is propelling
the move to power processing at the "point-of-
use" with low-power DC-DC converters physically
located right at their loads.
MPS’s miniature, full featured, 5 Watt BWR Models
were specifi cally designed for today’s demand-
ing distributed power architectures in aerospace,
marine, telecom and computer applications. The
converters’ small size (1" x 1" x 0.45"),
full 5 Watt output capability and low cost give
system architects unprecedented design and
layout fl exibility.
Occupying less than 0.5in
3
total volume, these
extremely compact, fully regulated and isolated
(1000Vdc) modules are available with ±5, ±12 or
±15 Volt outputs. Input voltage ranges are either
18-36 Volts ("D24" models) or 36-72 Volts ("D48"
models).
Although their overall size is 50-75% smaller than
many similarly rated power modules, these 1"
x 1" BWR Models are exact, drop-in, pin-for-pin
replacements for many standard 2" x 1" and 2"
x 2", 5 Watt modules. They achieve their small
size and low cost by exploiting a novel feedback
approach that does not depend upon traditional
optocoupler techniques.
All models are 5-side shielded and have a non-
conductive baseplate that permits pc-card runs
to be placed beneath the package. Units are
assembled using
high-speed automated SMT techniques and are
fully encapsulated with thermally
conductive potting compound. Every unit is electri-
cally tested before and after
encapsulation, 100% burned-in under full load,
hi-pot tested, and fi nal-electrical tested prior to
shipment. Every unit meets MPS’s traditional high
standards for quality and long-term reliability.
–V
OUT
+V
OUT
COMMON
+V
(1)
(2)
(3)
(4)
(6)
IN
–V
IN
PWM
*
Small size, 1" x 1" x 0.45"
Full 5 Watts output power
No external components required
Drop-in replacements for many standard,
2" x 1" DC-DCs
Wide input voltage ranges:
18-36V or 36-72V
Standard output voltages:
±5, ±12, ±15 Volts
Guaranteed effi ciencies to 80%
Fully regulated and isolated
(1000Vdc guaranteed)
Output overvoltage protection and
current limiting
–25 to +95oC operating temperature
Shielded cases (5 sides)
UL1950, CSA 22.2 No. 234, and IEC950
Modifi cations and customs for OEMs
Typical topology is shown.
Typical units
PRODUCT OVERVIEW
BWR Models
Miniature 5 Watt DC-DC Converters
MDC_BWR_5W.D01 Page 1 of 5
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