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)
Barrier
+Vout (8)
External
DC
Power
Source
On/Off
Control
(2)
Controller
and Power
Open = On
Duty Cycle
Reference and
Error Amplifier
-Vin (3)
-Vout (4)
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
www.murata-ps.com/support
MDC_RBE-12-20-D48.B05Δ
Page 1 of 16
RBE-12/20-D48 Series
Eighth-Brick 240-Watt Isolated DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
V
OUT
(V)
11.7
Input
Efficiency
Min. Typ.
91%
94.5%
Root Model
➀
RBE-12/20-D48
Total
I
OUT
Power
(A, max) (W)
20
234
Ripple & Noise
I
IN,
min. I
IN,
full
(mVp-p)
Regulation (max.)
➁
V
IN
Nom. Range load
load
Typ.
Line (%) Load (%)
(V)
(V)
(mA)
(A)
100
±2
±3
48
36-75
80
5.16
Package
Case (inches)
Case (mm)
2.3x0.9x0.4
58.4x22.9x10.16
Please refer to the part number structure for additional options and complete ordering part numbers.
➁
Line regulation is given as Vin = 40V to 75V, Iout = half load. Load regulation is Vin = 48V, Iout = Imin to Imax.
➂
All specifications are at the full input voltage range, maximum load, and full temperature range unless otherwise noted. See detailed specifications. Output capacitors are 1 μF in parallel with 10 μF and
470μF capacitor across the input pins. I/O caps are necessary for our test equipment and may not be needed for your application.
PART NUMBER STRUCTURE
R BE
-
12
/
20
-
D48 N M B H
Output Configuration:
Lx
-
C
RoHS Hazardous Substance Compliance
(does not claim EU RoHS exemption 7b–lead in solder)
C
= RoHS-6
Pin Length Option
(Through-hole
packages only)
Blank
= Standard pin length 0.180 inches (4.6mm)
L1
= Pin length 0.110 inches (2.79mm)
➀
L2
= Pin length 0.145 inches (3.68mm)
➀
Conformal coating (optional)
Blank
= no coating, standard
H
= Coating added, optional
➀
R
= Regulated
Eighth-Brick Package
Isolated converter
Nominal Output Voltage
Maximum Rated Output
Current in Amps
Input Voltage Range
D48
= 36-75V,
48V nominal
On/Off Control Logic
N
=
Negative logic
P
=
Positive logic
Baseplate
Blank
=
No baseplate
B
=
Baseplate installed
➁
Surface Mount
Blank = Thru-hole pin mount
M = Surface mount (MSL rating 1)
➂
➀
➁
➂
➃
Special quantity order is required; samples available with standard pin length only.
SMT (M) models are not available with a baseplate.
SMT (M) versions are not available in sample quantities.
Some model number combinations may not be available. See website or contact your local Murata sales representative.
www.murata-ps.com/support
MDC_RBE-12-20-D48.B05Δ
Page 2 of 16
RBE-12/20-D48 Series
Eighth-Brick 240-Watt Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Output Current
Conditions
➀
Full power operation, full temperature range
Operating or non-operating, tested:
100 mS max. duration
Input to output
None, install external fuse
Power on or off, referred to -Vin
Minimum
0
0
Typical/Nominal
Maximum
80
100
2250
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
None
0
0
15
237.51
Current-limited, no damage,
0
20
A
short-circuit protected
Operating Ambient Temperature Range
With derating
-40
85
°C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifications Table is not implied nor recommended.
INPUT
Operating voltage range
Voltage Transient (100ms duration)
Recommended External Fuse
Start-up threshold
Undervoltage lockout
Reverse Polarity Protection
Internal Filter Type
Input current
Full Load Conditions
Low Line
Inrush Transient
Short circuit Input current
No Load Input Current
Shut-Down Mode Input Current (Off, UV, OT)
Reflected (back) ripple current
➁
Pre-biased startup
Conditions
➀ ➂
36
Fast blow
Rising input voltage
Falling input voltage
None, install external fuse
48
15
33
31
None
Pi
5.16
6.99
150
80
5
70
Monotonic
94.5
93
75
100
34
32
Vdc
Vdc
A
Vdc
Vdc
Vdc
32
30
Vin = minimum
Vin = 48V
Iout = minimum, unit = ON, Vin = 48V
Measured at input with specified filter
External voltage < Vset
Vin = 48V
Vin = 75V
Input to output, continuous
Input to output, continuous
5.44
7.33
0.05
800
150
10
200
0
91
90
2250
2250
A
A
A
2
-Sec.
mA
mA
mA
mA, pk-pk
V
%
%
Vdc
Vdc
Vdc
Vdc
Mohm
pF
GENERAL and SAFETY
Efficiency
Isolation
Isolation Voltage – no baseplate
Isolation Voltage – with baseplate
Isolation Voltage, Input to baseplate
Isolation Voltage, Output to baseplate
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
1500
1500
basic
10
1500
Certified to UL-60950-1, CSA-C22.2 No.60950-1,
IEC/EN60950-1, 2nd Edition
Per Telcordia SR332, issue 2, Method 1, Class 1,
GF Tambient = +25C
Yes
2.1
200
Power ON 10% Vout to 90% Vout
(50% resistive load)
Remote ON to 10% Vout, Vin = 48V
(50% resistive load)
50-75-50% load step,
settling time to within ±1% of Vout.
(48Vin, 470uF output capacitance, 1A/uS)
same as above
15
15
2000
±600
Hours x 10
6
KHz
mS
mS
μSec
mV
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
Startup Delay
Rise time
Dynamic Load Response
Dynamic Load Peak Deviation
FEATURES and OPTIONS
Remote On/Off Control
➅
“N” suffix:
Negative Logic, ON state
Negative Logic, OFF state
Control Current
“P” suffix:
Positive Logic, ON state
Positive Logic, OFF state
Control Current
Base Plate
ON = Ground pin or external voltage
OFF = Pin open or external voltage
Sinking
ON = Pin open or external voltage
OFF = Ground pin or external voltage
Sinking
“B” suffix
-0.1
2.5
1
3.5
0
1
0.8
15
2
15
1
2
V
V
mA
V
V
mA
www.murata-ps.com/support
MDC_RBE-12-20-D48.B05Δ
Page 3 of 16
RBE-12/20-D48 Series
Eighth-Brick 240-Watt Isolated DC/DC Converters
FUNCTIONAL SPECIFICATIONS, CONTINUED
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Total Output Voltage Range
Vout Overshoot
Overvoltage Protection
Current
Output Current Range
Minimum Load
Current Limit Inception
Short Circuit
Short Circuit Current
Short Circuit Duration
(remove short for recovery)
Short circuit protection method
Regulation
➄
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading
See Derating
Vin = 48V, half load. ±1.5 accuracy
Over sample load (0-20A) and temperature
(see derating curves)
Output voltage clamped
0
90% of Vnom., after warmup
Hiccup technique, autorecovery within ±1.25%
of Vout
Output shorted to ground, no damage
Current limiting
Vin = 40 to 75V., Vout = nom., 50% load
Iout = 0 to 100%, Vin = 48V.
5 Hz- 20 MHz BW
At all outputs
Cap. ESR, Full resistive load
±2
±3
150
4700
2.3x0.9x0.4 max.
58.42x22.86x10.16
2.3x0.9x0.5
58.42x22.86x12.7
1.06
30
1.46
41.5
0.040±0.001
1.016±0.025
0.062±0.001
1.575±0.025
Copper alloy
50
5
Aluminum
-40
-40
-55
115
85
120
125
130
%
%
mV pk-pk
% of Vnom./°C
μF
Inches
mm
Inches
mm
Ounces
Grams
Ounces
Grams
Inches
mm
Inches
mm
μ-inches
μ-inches
24
0.0
11.525
10.5
13
13.5
20
No minimum load
28
4
Continuous
20
38
10
234
11.7
12
237.51
11.876
12.5
13.4
W
Vdc
Vdc
Vdc
Vdc
A
A
A
100
±0.02
470
MECHANICAL (Through Hole Models)
Outline Dimensions (no baseplate)
Outline Dimensions (with baseplate)
Weight (no baseplate)
Weight (with baseplate)
Through Hole Pin Diameter
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Baseplate Material
Conditions
➀ ➂
LxWxH (Please refer to outline drawing)
Input pins (see drawings)
Output pins (see drawings)
Nickel subplate
Gold overplate
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
Radiated, EN55022/CISPR22
RoHS rating
➃
With derating, no condensation
No derating required
Vin = Zero (no power)
External filter required
External filter required
°C
°C
°C
°C
Class
Class
125
B
B
RoHS-6
Notes
➀
Unless otherwise noted, all specifications apply over the full input voltage range, full temperature
range, nominal output voltage and full output load.
General conditions are near sea level altitude and natural convection airflow unless noted.
All models are tested and specified with external parallel 1 μF and 10 μF output capacitors. A 470
μF input capacitor is used across the input pins.
All capacitors are low-ESR types mounted close to the converter.
These capacitors are necessary for our test equipment and may not be needed in the user’s application.
➁
Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is
Cbus = 220 μF, Cin = 33 μF and Lbus = 12 μH.
➂
All models are stable and regulate to specification under no load.
➃
Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted
including lead).
➄
Regulation specifications describe the output voltage changes as the line voltage or load current is
varied from its nominal or midpoint value to either extreme.
➅
The Remote On/Off Control is referred to -Vin.
➆
Please refer to the Part Number Structure for complete ordering model numbers.
www.murata-ps.com/support
MDC_RBE-12-20-D48.B05Δ
Page 4 of 16
RBE-12/20-D48 Series
Eighth-Brick 240-Watt Isolated DC/DC Converters
TYPICAL PERFORMANCE DATA
Maximum Current Temperature Derating at sea level in Transverse Direction
Vin= 36V (air flow direction is from Vin- to Vin+), no baseplate
24
22
20
18
Output Current (Amps)
2.0 m/s (400LFM)
1.5 m/s (300LFM)
1.0 m/s (200LFM)
0.5 m/s (100LFM)
Output Current (Amps)
16
14
12
10
8
6
4
2
0
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
Maximum Current Temperature Derating at sea level in Longitudinal Direction
Vin= 36V (air flow direction is from Vin to Vout), no baseplate
24
22
20
18
16
14
12
10
8
6
4
2
0
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
2.0 m/s (400LFM)
1.5 m/s (300LFM)
1.0 m/s (200LFM)
0.5 m/s (100LFM)
Maximum Current Temperature Derating at sea level in Transverse Direction
Vin= 48V (air flow direction is from Vin- to Vin+), no baseplate
24
22
20
18
Output Current (Amps)
2.0 m/s (400LFM)
1.5 m/s (300LFM)
1.0 m/s (200LFM)
0.5 m/s (100LFM)
Maximum Current Temperature Derating at sea level in Longitudinal Direction
Vin= 48V (air flow direction is from Vin to Vout), no baseplate
24
22
20
18
Output Current (Amps)
16
14
12
10
8
6
4
2
0
2.0 m/s (400LFM)
1.5 m/s (300LFM)
1.0 m/s (200LFM)
0.5 m/s (100LFM)
16
14
12
10
8
6
4
2
0
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
Maximum Current Temperature Derating at sea level in Transverse Direction
Vin= 75V (air flow direction is from Vin- to Vin+), no baseplate
24
22
20
18
Output Current (Amps)
2.0 m/s (400LFM)
1.5 m/s (300LFM)
1.0 m/s (200LFM)
0.5 m/s (100LFM)
Maximum Current Temperature Derating at sea level in Longitudinal Direction
Vin= 75V (air flow direction is from Vin to Vout), no baseplate
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