RBE-12 Datasheet, PDF (1/15 Pages) Murata Manufacturing Co., Ltd. – Eighth-Brick 240-Watt Isolated DC/DC Converters

www.murata-ps.com
RBE-12/20-D48 Series
Eighth-Brick 240-Watt Isolated DC/DC Converters
Typical unit
FEATURES
240 Watts total output power, fixed12 VDC @ 20 A
94.5% ultra-high efficiency at full load with
regulation
36 to 75 Volt DC input range (48 VDC nominal)
Standard eighth-brick footprint
0.4-inch (10.2 mm) low height (no baseplate)
Synchronous rectifier topology with 100 mV
(typ.) ripple & noise
Up to +85° Celsius thermal performance (with
derating)
Stable no-load operation
Fully isolated to 2250 VDC (BASIC, no baseplate)
Remote On/Off enable control
Extensive protection features – SC, OC, UVLO, OT
Certified to safety, emissions and environmental
standards
Meets UL 60950-1, CAN/CSAC22.2 No. 60950-1,
IEC60950-1, EN60950-1 safety approvals
(2nd Edition) (pending)
PRODUCT OVERVIEW
The fully isolated (2250 Vdc, no baseplate) RBE-
12/20-D48 series accept a 36 to 75 Volt DC input
voltage range (48 VDC nominal) and converts it to a
fixed 12Vdc output. Applications include 48V-pow-
ered datacom and telecom installations, base
stations, cellular dataphone repeaters, instruments
and embedded systems. Wideband output ripple
and noise is a low 100 mV (typical), peak-to-peak.
Reduced open frame overall height of 0.4˝ (10.2
mm) fits tight card cages.
The RBE’s regulated synchronous-rectifier
topology and fixed frequency operation means
excellent efficiencies up to 94.5%, enabling “no
heatsink” operation for most applications up to
+85° Celsius (see derating curves). “No fan” or
zero airflow higher temperature applications may
use the optional base plate for cold plate mounting
or natural-convection heatsinks.
Electronic protection features include input
undervoltage lockout (UVLO) , output current limit,
short circuit hiccup, and overtemperature shut-
down. Available options include positive or negative
logic On/Off control, conformal coating, various
pin lengths, and the baseplate. Assembled using
ISO-certified automated surface-mount techniques,
the RBE series is certified to UL and IEC safety
standards.
F1
+Vin (1)
External
DC
Power
Source
On/Off
Control
(2)
Open = On
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1PTJUJWF

MPHJD
-Vin (3)
Ḥ
*TPMBUJPO
Barrier
Controller
and Power
5SBOTGFS
Duty Cycle
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t
4XJUDIJOH
t
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t
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4FOTF
Reference and
Error Amplifier
Figure 1. Connection Diagram
Typical topology is shown. Murata Power Solutions
recommends an external fuse at F1.
For full details go to
www.murata-ps.com/rohs
(pending)
www.murata-ps.com/support
+Vout (8)
-Vout (4)
MDC_RBE-12-20-D48.A02Δ Page 1 of 15