BWR-5/3-3.3/4.25-D12A View Datasheet(PDF) - Murata Power Solutions
Part Name
Description
Manufacturer
BWR-5/3-3.3/4.25-D12A
Murata Power Solutions
BWR-5/3-3.3/4.25-D12A Datasheet PDF : 6 Pages
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www.murata-ps.com
Dual Output BWR Models
Mixed Voltage, 5V and 3.3V, Independent Dual Output
30 Watt DC/DC Converters
FEATURES
Independently regulated 5V/ 3.3V outputs
5V @ 3A/3.3V @ 4.25A simultaneously
delivered
Independent VOUT Trim pins for margining
Independent On/Off Control pins
88% efficiency; 75mV ripple/noise
Input ranges: 10-18V, 18-36V or 36-75V
UL 1950 and EN60950-1 safety approvals
Fully isolated, 1500Vdc guaranteed
Input under and overvoltage shutdown
Independent OVP; short circuit protection
Thermal shutdown
PRODUCT OVERVIEW
Murata Power Solutions' BWR series of DC/DC con-
verters now includes two independent converters in
one 2" x 2" package. The BWR-5/3-3.3/4.25 family
provides both 5V at 3 Amps and 3.3V at 4.25 Amps
for a combined output power of 30 Watts from input
ranges of 10V to 18V (-D12A), 18 to 36V (-D24A), or
36 to 75V (-D48A).
Each output is regulated by its own control loop
to provide ±1% load and ±0.5% line regulation.
Individual trim pins and a negative or positive
on/off control pin allow independent adjustment of
output voltages and any combination of power-on
sequencing between the 5V and 3.3V outputs. A
high efficiency of 88% allows full load operation
up to +65°C ambient temperature in a still air
environment. Although functionally indepen-
dent, both outputs are driven from synchronized
PWMs to prevent asynchronously generated beat
frequencies.
Housed in a plastic case, all models include
input Pi filtering, input overvoltage protection,
independent output short circuit and current
limiting protection and independent output
overvoltage protection as well as thermal shut-
down. These devices meet IEC950, UL1950 and
EN6950-1 safety standards. CB reports are avail-
able upon request. "D48A" models are CE marked
(meet LVD requirements).
+INPUT
(1)
–INPUT
(2)
5V ON/OFF
CONTROL
(3)
INPUT UNDERVOLTAGE
AND OVERVOLTAGE
COMPARATORS
3.3V ON/OFF
CONTROL
(4)
SWITCH
CONTROL
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
SWITCH
CONTROL
Figure 1. Simplified Schematic
+5V OUTPUT
(5)
+5V OUTPUT
RETURN
(6)
+5V TRIM
(7)
+3.3V TRIM
(10)
+3.3V OUTPUT
(9)
+3.3V OUTPUT
RETURN
(8)
MDC_BWR30.B05 Page 1 of 6
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