Dual Output BWR Models
www.murata-ps.com
Mixed Voltage, 5V AND 3.3V, 2” x 2”
33 Watt DC/DC Converters
Typical units
FEATURES
PRODUCT OVERVIEW
Regulated 3.3V and 5V outputs
For applications requiring 33 watts of power from
5V and 3.3V, DATEL offers a new power sharing
DC/DC converter capable of meeting your output
current requirements. The BWR-5/6-3.3/7-D48
(36-75V input), BWR-5/6-3.3/7-D24 (18-36V
input) and BWR-5/6-3.3/7-D12 (10-18V input)
are fully isolated DC/DC converters capable of
delivering any combination of 5V and 3.3V load-
ing up to a combined total of 33 Watts of output
power.
Housed in a standard 2" x 2" x 0.45" metal
package coated with electrically non-conductive
finish, these converters utilize a shared control-
loop system to assure load regulation of 1ꢀ for
3.3V output and 1.5ꢀ for 5V output. All models
include input Pi filtering, input overvoltage and
undervoltage shutdown circuitry, output overvolt-
age protection, output short-circuit and current
limiting protection, and thermal shutdown.
Each design also provides trim capability and
on/off control function. Fully synchronous output
rectification renders high efficiency and no-load
operation.
BWR power sharing modules offer low ripple
and noise performance, high efficiency (88ꢀ),
1500Vdc of isolation voltage, and are fully
specified for –40 to +100°C operation. These
devices meet IEC950, UL1950 and EN6950 safety
standards, including BASIC insulation require-
ments for “D48” models. CB reports are available
on request. “D48” models are CE marked (meet
LVD requirements).
5V @ 6Amps/3.3V @ 7 Amps capability
33 Watts total output power
No-load operation
Available input voltage ranges:
10-18V, 18-36V or 36-75V
Small 2" x 2" x 0.45" package
UL1950 and EN60950-1 safety approvals
mark available (75V-input models)
Continuous short-circuit protection
Fully isolated, 1500Vdc guaranteed
–40 to +100°C operating temperature
Input under and overvoltage shutdown
Output overvoltage protection
Thermal shutdowns
+5V OUTPUT
(5)
+INPUT
(1)
SWITCH
CONTROL
+3.3V OUTPUT
(7)
–INPUT
(2)
OUTPUT
RETURN
(6)
ON/OFF
CONTROL
(4)
PWM
CONTROLLER
ACTIVE
BLEEDER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
UV & OV
COMPARATORS
THERMAL
SHUTDOWN
TRIM
(8)
Typical topology is shown.
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
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