RBQ-12 Datasheet, PDF (1/15 Pages) Murata Manufacturing Co., Ltd. – Quarter-Brick 400-Watt Isolated DC-DC Converters

www.murata-ps.com
RBQ-12/33-D48
Quarter-Brick 400-Watt Isolated DC-DC Converters
Output (Vout, max)
11.85
Current (A)
33
Nominal Input (V)
48
Typical unit
FEATURES
391 Watts total output power, 11.85 VDC @ 33 A
Regulated Intermediated Bus Architecture (RIBA)
with PoL converters
96% ultra-high efficiency at full load (typical)
36 to 75 Volt DC input range (48 VDC nominal)
Standard quarter-brick footprint
Synchronous rectifier topology with 100 mV
ripple & noise
Up to +85° Celsius thermal performance (with
derating)
Stable no-load operation
Multiple-unit parallel operation for increased
current
Fully isolated to 2250 VDC (BASIC)
Remote On/Off enable control
Extensive protection features – SC, OC, UVLO, OT
Certified to full safety, emissions and environ-
mental standards
Approved to UL 60950-1, CAN/CSAC22.2 No.
60950-1, IEC60950-1, EN60950-1 safety ap-
provals (2nd Edition, with Amendment 1)
PRODUCT OVERVIEW
The fully isolated (2250 Vdc) RBQ-12/33-D48
module accepts a 36 to 75 Volt DC input voltage
range (48 VDC nominal) and converts it to a low Vdc
output. Applications include 48V-powered datacom
and telecom installations, base stations, cellular
dataphone repeaters, instruments and embedded
systems. Wideband output ripple and noise is a low
100 mV, peak-to-peak.
The RBQ’s synchronous-rectifier topology with
line regulation and fixed frequency operation
means excellent efficiencies up to 96%, enabling
“no heatsink” operation for most applications up
to +85° Celsius (with derating airflow). “No fan” or
zero airflow higher temperature applications may
use the optional base plate for cold surface mount-
ing or natural-convection heatsinks.
A wealth of electronic protection features include
input undervoltage lockout (UVLO) , output current
limit, short circuit hiccup, and overtemperature
shutdown. Available options include positive or
negative logic remote On/Off control, conformal
coating, various pin lengths, and the baseplate.
Assembled using ISO-certified automated surface-
mount techniques, the RBQ series is certified to
all UL and IEC emissions, safety and flammability
standards.
F1
+Vin (1)
External
DC
Power
Source
On/Off
Control
(2)
Open = On
$MPTFE

0GG
1PTJUJWF

MPHJD
-Vin (3)
*TPMBUJPO
Barrier
Controller
and Power
5SBOTGFS
Duty Cycle
3FHVMBUJPO
t
4XJUDIJOH
t
'JMUFST
t
$VSSFOU
4FOTF
Reference and
Error Amplifier
Figure 1. Connection Diagram
Typical topology is shown. Murata Power Solutions
recommends an external fuse at F1.
Ḥ
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
+Vout (8)
-Vout (4)
MDC_RBQ-12/33-D48.A02Δ Page 1 of 15