LAST TIME BUY: 3/31/2015. CLICK HERE FOR OBSOLESCENCE NOTICE OF 10/31/2014.
RBC-12/17-D48 Series
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Quarter Brick, Regulated Bus Converters
Output (V) Current (A) Nominal Input (V)
12 17 48
Optimized for distributed power Regulated Intermediate Bus Archi-
Typical unit tectures (RIBA), the RBC DC/DC bus converter series offer regulated
outputs (1.5%) in an industry-standard quarter brick open frame
package.
FEATURES PRODUCT OVERVIEW
n The present trend in distributed power architec- The RBCs synchronous-rectifier topology and fixed
Up to 210 Watts total output power
tures (DPA) requires both high efficiency and some frequency operation means excellent efficiencies.
n
Up to 93% ultra-high efficiency @ full load
regulation of the output voltage to reduce the risk No fan or zero airflow applications may use the
n
48V Input ( up to 36-75V range)
of under voltage dropout. Earlier unregulated bus optional base plate for cold surface mounting or
n
12V/17A Output for Regulated Intermediate Bus converters were simply ratiometric DC transform- natural-convection heatsinks.
ers. The fully isolated (2250Vdc) RBC series accept A wealth of electronic protection features include
Architectures (RIBA) with POL converters
a wide range 36 to 75 Volt DC input (48V nominal) input undervoltage (UV) lockout, output current limit,
n
Synchronous-rectifier topology
and convert it to an output of 12Vdc. This output short circuit hiccup, overtemperature shutdown and
n
225kHz fixed switching frequency
then drives point-of-load (PoL) converters such as output overvoltage. Available options include posi-
n
Fully isolated, 2250Vdc (BASIC) our Okami, LSN, LEN, LSM or LQN series which tive or negative logic remote On/Off control and the
feature precise load regulation. Applications include baseplate. Assembled using ISO-certified automated
n
2.3" x 1.45" x 0.42" quarter brick
48V-powered datacom and telecom installations, surface-mount techniques, the RBC series includes
n
Stable no-load condition
base stations, cellular telephone repeaters and all UL and IEC emissions, safety and flammability
n
Thermal shutdown embedded systems. Low overall height of 0.42" certifications.
(10.7 mm) fits tight card cages.
n
Fully I/O protected
n
Certified to UL/IEC/EN 60950-1 and CSA C22.2
No.60950-1-07, 2nd edition
+VIN
+VOUT
(1)
(8)
VIN
(3)
GATE
VOUT
DRIVE
(4)
SWITCHING
CONTROLLER
VOLTAGE
SENSE
CURRENT
REMOTE
HICCUP
SENSE
ON/OFF
(2)
OV, UV, OT
Typical topology is shown.
SHUTDOWN
Figure 1. Simplified Block Diagram
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_RBC-12/17-D48.C01 Page 1 of 10RBC-12/17-D48 Series
Quarter Brick, Regulated Bus Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
IOUT Regulation VIN Iin, no Iin, full
VOUT R/N (mV pk-pk) Range Efficiency Package
Root Model (Max.) (Max.) (Nom.) load load
V A Typ. Max. Line Load V V mA A Min. Typ. Case Pinout
RBC-12/17-D48N-C 12 17 50 75 0.65% 1.5% 48 36-75 165 4.59 90.5% 92.5% C49 P65
Please refer to the part number structure for complete model numbers
PART NUMBER STRUCTURE
- C
R BC - 12 / 17 - D48 N B
RoHS-6 hazardous substance compliant
Regulated
(does not claim EU RoHS exemption 7blead in solder)
Bus Converter
Note:
Some model number combinations may not be
Nominal Output Voltage:
Optional Baseplate,
available. Contact Murata Power Solutions for
12 Volts
special order
ordering assistance.
Maximum Rated Output:
Current in Amps
Optional:
On/Off Control
Input Voltage Range:
N = negative logic , standard
D48 = 36 to 75 Volts
P = positive logic, optional
(48V nominal)
CAUTION This converter is not internally fused. To avoid danger to persons or allow the instantaneous input voltage to go below the minimum voltage at all
equipment and to retain safety certification, the user must connect an external times. Even if this voltage depression is very brief, this may interfere with the
fast-blow input fuse as listed in the specifications. Be sure that the PC board on-board controller and possibly cause a failed start.
pad area and etch size are adequate to provide enough current so that the fuse
Use a moderate size capacitor very close to the input terminals. You may need
will blow with an overload.
two parallel capacitors. A larger electrolytic or tantalum cap supplies the surge
current and a smaller parallel low-ESR ceramic cap gives low AC impedance.
Start-Up Considerations
Remember that the input current is carried both by the wiring and the ground
When power is first applied to the DC/DC converter, there is some risk of start
plane return. Make sure the ground plane uses adequate thickness copper. Run
up difficulties if you do not have both low AC and DC impedance and adequate
additional bus wire if necessary.
regulation of the input source. Make sure that your source supply does not
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MDC_RBC-12/17-D48.C01 Page 2 of 10