MURATA BWR Technical data

BWR Models

MINIATURE, 5 WATT DC/DC CONVERTERS

Features

N

Small size, 1" x 1" x 0.45"

N

Full 5 Watts output power

N

No external components required

N

Drop-in replacements for many
standard, 2" x 1" DC/DC’s

N

Wide input voltage ranges:
18-36V or 36-72V

N

Standard output voltages:
±5, ±12, ±15 Volts

N

Guaranteed efficiencies to 80%

N

Fully regulated and isolated

(1000Vdc guaranteed)

N

Output overvoltage protection and
current limiting

N

–25 to +95

N

Shielded cases (5 sides)

N

UL1950, CSA 22.2 No. 234, and IEC950

N

Modifications and customs for OEM's

o

C operating temperature

The migration to distributed power is accelerating. The critical need for accurate
voltages, tight regulation 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 specifically designed
for today’s demanding 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 flexibility.

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 electrically tested before and after
encapsulation, 100% burned-in under full load, hi-pot tested, and final-electrical
tested prior to shipment. Every unit meets MPS’s traditional high standards for qual­ity and long-term reliability.

For full details go to

www.murata-ps.com/rohs

+V

–V

*

IN

(1)

PWM

IN

(2)

+V

OUT

(3)

COMMON

(4)

–V

OUT

(6)

* "D24" models only

Figure 1. Simplified Schematic

Typical topology is shown.

www.murata-ps.com Technical enquiries email: [e-mail], tel: [phone]

MDC_BWR_5W_B01 Page 1 of 5

BWR Models

MINIATURE, 5 WATT DC/DC CONVERTERS

Performance Specifications and Ordering Guide

Output

R/N (mVp-p) 

Typ. Max.

Model

V



OUT

(Volts)

IOUT

(mA, Max.)

~

Regulation (Max.)

Line

Load 

V

IN Nom.

(Volts)

Input

Range
(Volts)

IIN 

(mA, Max.)

Efficiency

Min. Typ.

Package

BWR-5/500-D24 ± 5 ±500 100 150 ±2% ±2% 24 18-36 25/282 75% 78% C7, P4

BWR-5/500-D48 ± 5 ±500 100 120 ±2% ±2% 48 36-72 25/141 75% 78% C7, P4

BWR-12/210-D24 ±12 ±210 100 150 ±2% ±2% 24 18-36 25/264 80% 82% C7, P4

BWR-12/210-D48 ±12 ±210 100 150 ±2% ±2% 48 36-72 25/133 80% 82% C7, P4

BWR-15/165-D24 ±15 ±165 100 150 ±2% ±2% 24 18-36 25/260 80% 83% C7, P4

BWR-15/165-D48 ±15 ±165 100 150 ±2% ±2% 48 36-72 25/130 80% 82% C7, P4

~ Typical at TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted. 
 Ripple/Noise (R/N) measured over a 20MHz bandwidth.
 Balanced loads, 20% to 100% load.
 Nominal line voltage, no-load/full-load conditions.
 See part number structure below.

PART NUMBER STRUCTURE

/

15B WR 165 D24-

Output Configuration:

B = Bipolar

Wide Range Input

Nominal Output Voltages:

±5, ±12 or ±15 Volts

Maximum Output Current

in mA from each output

-

C-

RoHS-6 Compliance*

Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-72 Volts (48V nominal)

MECHANICAL SPECIFICATIONS

Case C7

1.00

(25.40)

0.45

(11.43)

0.20 MIN
(5.08)

0.800

(20.32)

METAL CASE

INSULATED BASE

0.040 ±0.002 DIA.
(1.016 ±0.051)

0.10

(2.54)

(Case,

Pinout)

Contact Murata Power Solutions for availability.

TEMPERATURE DERATING

5

4.5

4

3.5

3

2.5

2

Output Power (Watts)

1.5

1

0.5

0

–25 0 35 40 45 50 55 60 65 70 75 80 85 90 95

Ambient Temperature (°C)

0.100
(2.54)

0.200
(5.08)

DIMENSIONS ARE IN INCHES (MM)

I/O Connections

Pin Function P4

1 +Input
2 –Input
3 +Output
4 Common
5 No Pin
6 –Output

Technical enquiries email: [e-mail], tel: [phone]www.murata-ps.com

1

2

BOTTOM VIEW

3

0.400

(10.16)

4

5

6

0.200
(5.08)

0.800

(20.32)

0.10

(2.54)

Notes:

For "D24" models, the case
is connected to pin 2 (–V

IN).

For "D48" models, the case
is connected to pin 1 (+V

IN).

MDC_BWR_5W_B01 Page 2 of 5

1.00

(25.40)