Features
ICE
Technology*
Description
• +115°C Maximum Case Temperature
• -45°C Minimum Case Temperature
• Baseplate Case Style
• 2250VDC Isolation
• Wide 4:1 Input Voltage Range
• EN-50155 and EN-50121-3-2 Certified
DC/DC Converter
RPR50-11024S-B
The RPR50 series DC/DC converters are designed for railway rolling stock applications. Besides covering all
the input voltages from 40VDC up to 160VDC, the converters have a very wide operating temperature range
of -45°C to +115°C. The RPR50 has a baseplate case for high vibration or bulkhead-mounting applications.
It is EN-50155 and EN-50121-3-2 certified.
50 Watt 4:1
2“ x 1.6“
Baseplate Style
Single Output
Selection Guide
Part
Number
RPR50-11024S-B
Input
Voltage Range
[VDC]
40-160
Notes:
Note1:
Input
Current
[mA]
520
Output
Voltage
[VDC]
24
Output
Current
[mA]
2080
Efficiency
typ.
[%]
88
Max. Capacitive
Load
[µF]
470
Typical values at nominal input voltage and full load.
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm-up)
BASIC CHARACTERISTICS
Parameter
Input Voltage Range
Transient Input Voltage
Inrush Current
Under- Voltage Lockout
Remote ON/OFF
Remote OFF Input Voltage
Start Up Time
Internal Operating Frequency
Output Voltage Trimming
Efficiency
Minimum Load
Output Ripple and Noise
typ. Vin, full load
20MHz limited, 1µF output MLCC
87%
0%
240mVp-p
360mVp-p
Condition
nom. Vin= 110VDC
≤100ms
with EMC Filter
without EMC Filter
DC-DC ON
DC-DC OFF
ON / high logic
OFF / low logic
nominal input
when use CTRL function
Min.
40VDC
Typ.
110VDC
Max.
160VDC
180VDC
50A
40A
EN50155 Certified
IEC/EN60950-1 Certified
39VDC
Open, 8V
Short, 0V
5mA
20ms
220kHz
260kHz
±10%
88%
300kHz
* ICE Technology
ICE (Innovation in Converter Excellence)
uses state-of-the-art techniques to minimise
internal power dissipation and to increase
the internal temperature limits to extend the
ambient operating temperature range to the
maximum.
36VDC
60V
1.2V
Efficiency vs. Load
100100
90 90
100100
90 90
Efficiency vs. Input Voltage
Efficiency [%]
Efficiency [%]
80 80
70 70
40Vin
40Vin
110Vin
110Vin
160Vin
160Vin
60 60
50 50
40 40
10 1020 2030 30 40 4050 50 60 6070 70 80 8090 90 100
100
Load [%]
Load [%]
Efficiency [%]
Efficiency [%]
80 80
70 70
60 60
50 50
40 40
40 4060 6070 70 80 80 100 110 120 130 140 160
100 110 120 130 140 160
Input Voltage [V] [V]
Input Voltage
continued on next page
60 60
https://www.recom-power.com/pdf/
Powerline_DC-DC/RSPxxx-168.pdf
Temperature [°C]
Temperature [°C]
55 55
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50 50
45 45
40 40
REV.: 4/2018
RPR-1
RPR50-11024S-B
DC/DC Converter
Trimming Output Voltage
Only the single output converters have a trim function that allows users to adjust the output voltage from +10% to -10%, please refer to
the trim table that follow for details. Adjustment to the output voltage can be used with a simple fixed resistor as shown in Figures 1 and 2.
A single fixed resistor can increase or decrease the output voltage depending on its connection. Resistor should be located close to the converter.
If the trim function is not used, leave the trim pin open.
Trim adjustments higher than the specified range can have an adverse effect on the converter´s performance and are not recommended.
Excessive voltage differences between output voltage sense voltage, in conjunction with trim adjustment of the output voltage; can cause
the OVP circuitry to activate. Thermal derating is based on maximum output current and voltage at the converter´s output pins. Use of
the trim and sense function can cause output voltages to increase, thereby increasing output power beyond the converter´s specified rating.
Therefore: (Vout at Pins) X (Iout)
≤
rated output power.
+V
IN
CTRL
-V
IN
+V
OUT
TRIM
R
TRIM
UP
-V
OUT
-V
IN
-V
OUT
+V
IN
+V
OUT
TRIM
R
TRIM
DOWN
Series
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm-up)
LOAD
CTRL
LOAD
Figure 1.
Trim connections to increase
output voltage using fixed resistors
Trim up register value (KW)
Vout
1%
2%
3%
4%
5%
56.6
6%
38.1
7%
24.7
8%
14.6
9%
6.9
10%
0.7
Vout
Figure 2.
Trim connections to decrease output
voltage using fixed resistors
Trim down register value (KW)
-1%
-2%
-3%
-4%
-5%
-6%
59
-7%
40.3
-8%
26.2
-9% -10%
15
6.9
24VDC
642.7 333.5 194.3 123.8 84.9
24VDC
457.3 221.2 128.1 84.5
REGULATIONS
Parameter
Output Voltage Accuracy
Line Voltage Regulation
Load Voltage Regulation
Transient Recovery Time
Transient Peak Deviation
Condition
50% load
low line to high line
10% to 100% load
25% load step change,
ΔIo/Δt=2.5A/us
25% load step change,
ΔIo/Δt=2.5A/us
Value
±1.5% max.
±0.3% max.
±0.5% max.
800µs typ.
±2%Vout max.
PROTECTIONS
Parameter
Surge Resistance
Output Power Protection (OPP)
Over Voltage Protection (OVP)
Over Temperature Protection (OTP)
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Notes:
Note2:
RPR-2
Condition
≤10ms
Hiccup Mode
10% load
case temperature
I/P to O/P, at 70% RH
I/P to Case, O/P to Case
I/P to O/P , at 70% RH
I/P to O/P
This Power Module is not internally fused. A input fuse must be always used. Recommended Fuse: T2A
REV.: 4/2018
Value
250VDC
120% typ.
120% typ.
120°C, auto-recovery
2250VDC / 1 Minute
1500VDC / 1 Minute
100MW min.
330pF typ.
www.recom-power.com
RPR50-11024S-B
DC/DC Converter
ENVIRONMENTAL
100
90
Series
100
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm-up)
Parameter
Operating Case Temperature Range
Temperature Coefficient
Thermal Impedance
Humidity
MTBF (+50°C G.B.)
Efficiency [%]
80
70
60
50
40
10
20
start up by -45°C
natural convection
mounting at FR4 (254x254mm) PCB
according to MIL-HDBK-217F
according to BellCore-TR-332
30 40 50 60 70 80
Efficiency [%]
Condition
90
Value
40Vin
110Vin
160Vin
90
100
80
-45°C to (see calculation)
±0.04% / °C max.
70
vertical 4.8°C/W
horizontal 7°C/W
60
50
40
95%, non condensing
609 x 10
3
hours
1541 x 10
3
hours
60 70 80 100
40
1
Derating Graph
(Ta= +25°C, natural convection, typ. Vin and vertical mounting)
Load [%]
Input Volta
60
Case Temperature [°C]
55
50
45
40
35
30
0
10
20
30
40
50
60
70
80
90 100
Load [%]
Calculation
R
thcase-ambient
= 4.8°C/W (vertical)
R
thcase-ambient
= 7°C/W (horizontal)
R
thcase-ambient
=
T
case
- T
ambient
P
dissipation
P
=
OUTapp
- P
OUTapp
h
T
case
T
ambient
P
dissipation
P
IN
P
OUT
h
= Case Temperature
= Environment Temperature
= Internal losses
= Input Power
= Output Power
= Efficiency under given Operating Conditions
P
dissipation
= P
IN
- P
OUT
R
thcase-ambient
= Thermal Impedance
Practical Example:
Take the RPR50-11024S-B with 50% load. What is the maximum ambient operating temperature? Use converter vertical in application.
Eff
min
= 87% @ V
nom
P
OUT
= 50W
P
OUTapp
= 50 x 0.5 = 25W
P
dissipation
=
P
OUTapp
- P
OUTapp
h
R
th
=
T
casemax
- T
ambient
P
dissipation
--> 4.8°C/W =
115°C - T
ambient
3.41W
h
= ~88% (from Eff vs Load Graph)
25
- 25 = 3.41W
P
dissipation
=
0.88
T
ambientmax
= 98.6°C
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REV.: 4/2018
RPR-3
RPR50-11024S-B
DC/DC Converter
SAFETY AND CERTIFICATIONS
Certificate Type
IEC/EN General Safety
Series
Report / File Number
SPCLVD1108088-1
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm-up)
Standard / Edition
IEC/EN-60950-1 2nd Edition
Certificate Type (Environmental)
EMI
ESD
Radiated Immunity
Fast Transient
Surge
Conducted Immunity
Vibration
Thermal Cycling (complies with MIL-STD-810F)
Shock
Conditions
with external Filter
±8kV Air Discharge, ±6kV Contact Discharge
Level 3, 10V/M
±4kV Applied
±4kV Applied
Level 3, 10V rms
50-150Hz, along X,Y and Z
12 cycles
5g / 30ms
Standard / Criterion
EN-55022, Class A
EN-61000-4-2, Criteria B
EN-61000-4-3, Criteria A
EN-61000-4-4, Criteria B
EN-61000-4-5, Criteria B
EN-61000-4-6, Criteria A
EN-60068-2-6
EN-60068-2-14
EN-60068-2-27
EMC Filtering - Suggestions
C8
D1
L1
C4
UR1
C1
C2
C3
C5
C6
+V
IN
DUT
C7
Load
It is recommended to add UR1 and D1 in railway
application. C1, C2, C3 & L1 can be modified for
required EMI standards. To meet EN61000-4-2,
module case should be earth grounded. We offer
independent case pin option on request, the location is
between pin 2 and pin 6.
-V
IN
C9
Standard
EN55022 Class A
EN61000-4-2, 3, 4, 5, 6
UR1
MOV 14D361K
D1
250V / 3A
C1
L1
N/A
C2
470nF/250V
C3
680µF/250V
C4, C5, C6, C7
0.47nF (Y1 CAP)
C8, C9
1nF (Y1 CAP)
1.5µF/250V 1200µH ±20%
Soldering
Hand Soldering
Hand Soldering is the least preferred method because the amount of
solder applied, the time the soldering iron is held on the joint, the
temperature of the iron and the temperature of the solder joint are
variable.
The recommended hand soldering guideline is listed in Table 1. The
suggested soldering process must keep the power module’s internal
temperature below the critical temprature of 217°C continuously.
Wave Soldering
High temperature and long soldering time will result in IMC layer
increasing in thickness and thereby shorten the solder joint lifetime.
Therefore the peak temperature over 245°C is not suggested due
to the potential reliability risk of components under continuous high-
temperature. In the meanwhile, the soldering time of temperature
above 217°C should be less than 90 seconds. Please refer to the sol-
dering profile below for recommended temperature profile parameters.
Table 1 Hand-Soldering Guideline
Parameter
Soldering
Iron Wattage
Tip
Temperature
Soldering Time
Single-side
Circuit Boad
90W
385 ±10°C
2-6 seconds
Double-side
Circuit Board
90W
420 ±10°C
4-10 seconds
Multi-layers
Circuit Board
90W
420 ±10°C
4-10 seconds
T
emp
Peak T
emp. 240 - 245°C
217°C
200°C
150°C
Preheat time100-140 sec.
Ramp downmax. 4°C/sec
Time Limited 90sec.above 217°C
25°C
Ramp upmax. 3°C/sec
Time
RPR-4
REV.: 4/2018
www.recom-power.com
RPR50-11024S-B
DC/DC Converter
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Case Material
Package Dimension (LxWxH)
Package Weight
Series
Value
Aluminium
50.8 x 40.6 x 11.4mm
40g
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm-up)
Dimension Drawing (mm)
50.8
40.6
9.7
dia. 1.0
11.40
0.51
4.32
45.72
M3 screw x6
1.75
5.08
2.54
10.16
3.56
7.62
10.16
2.5
1
10.16
2
6
5.08
3
Bottom View
4
5
30.48
35.60
Pin Connections
Pin #
Single
1
2
3
4
5
6
Tolerance
:
+Vin
-Vin
+Vout
-Vout
Trim
CTRL
10.16
10.16
±
0.8mm
17.78
37.08
17.78
INSTALLATION and APPLICATION
Mounting Instruction
Baseplate Case Fixing - Mounting onto Heatsink/Bulkhead
PCB
Baseplate Case Fixing - Anti Vibration Mounting onto PCB
Use 10mm
Spacers
PCB
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REV.: 4/2018
RPR-5
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