The RPP50 series 2:1 input range DC/DC converters are ideal for high end industrial applications and COTS
Military applications where a very wide operating temperature range of -45°C to +120°C is required.
Although the case size is very compact, the converter contains a built-in filter EN55022 Class B / FCC Level B wit-
hout the need for any external components. The RPP50 is available in two case styles: the ribbed case for active
cooling and the baseplate case for high vibration, bulkhead-mounting or for passive heatsink cooling applications.
They are UL-60950-1 certified.
50 Watt
2:1 Single
Output
Selection Guide
24V and 48V Input Types
Part Number
Input
Range
VDC
18-36
18-36
18-36
18-36
18-36
36-75
36-75
36-75
36-75
36-75
Output
Voltage
VDC
3.3
5
12
15
24
3.3
5
12
15
24
Output
Current
A
15
10
4.16
3.33
2.10
15
10
4.16
3.33
2.10
Input
(1)
Current
mA
58/2405
60/2315
18/2370
18/2315
18/2315
42/1177
37/1140
11/1165
11/1141
11/1141
Efficiency
(2)
(Typ.)
86%
89%
87%
88%
88%
87%
89%
87%
88%
88%
2011/65/EU
6/6
RPP50-243.3S
RPP50-2405S
RPP50-2412S
RPP50-2415S
RPP50-2424S
RPP50-483.3S
RPP50-4805S
RPP50-4812S
RPP50-4815S
RPP50-4824S
RoHS
UL-60950-1 Certified
E224736
RPP50-S
* 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.
Refer to Application Notes
** add suffix for case options
SUFFIX INFORMATION
none = Standard Ribbed Case
-B = Baseplate Case
For other CTRL logic (-1), case style (-F) or low temperature options (-L, -M, -T) please contact RECOM for
availability.
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REV: 0/2014
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DC/DC-Converter
Specifications
(typical at nominal input and 25°C unless otherwise noted)
Input Voltage Range
Under Voltage Lockout
24V nominal input
48V nominal input
24V input DC-DC ON (min.)
DC-DC OFF (max.)
48V input DC-DC ON (min.)
DC-DC OFF (max.)
24V Input
48V Input
nominal Vin and full load
nominal Vin and constant resistor load
Logic High
Logic Low
Nominal input
10% Load and nominal Vin
RPP50-S
Series
18-36VDC
36-75VDC
17.5VDC
17VDC
35VDC
34VDC
Common Mode EMC Filter
50VDC
100VDC
300mAp-p
20ms typ., 50ms max.
Open or 3.0V < Vr < 5.5V
Short or 0V < Vr < 1.2V
2mA typ.
±1%
±10%
0%
low line, high line at full load
10% to 100% full load
3.3V, 5V
All others
±0.3%
±0.5%
60mVp-p typ.
40mVp-p typ.
±0.04%/°C max.
25% load step change
% of full load at nominal Vin
200µs
120% typ.
Hiccup, automatic recovery
Converter shutdown if Vout > Vout nominal + 20%
Rated at 2250VDC/1 minute, Flash tested at 3000VDC/1 second
10MΩ min.
3000pF max.
260kHz ± 40kHz Maximum
+115°C
-55°C to +125°C
internal thermistor
Ambient, Free Convection
Ribbed Case: Vertical
Ribbed Case: Horizontal
-40°C to see Calculation (Note 7)
7.3°C/Watt
10°C/Watt
5% to 95% RH
Aluminium
Silicone (UL94-V0)
Ribbed Case
Baseplate Case
Ribbed Case
Baseplate Case
39g
43g
4 pcs per Tube
Single packed
Input Filter
Input Surge Voltage (100 ms max.)
Input Reflected Ripple
Start Up Time
Remote ON/OFF
(3)
Remote OFF input current
Output Voltage Accuracy
Voltage Adjustability
Minimum Load
Line Regulation
Load Regulation
Ripple and Noise (20MHz bandwith limited)
(measured with 1µF capacitor across output)
Temperature Coefficient
Transient Response
Over Load Protection
RPP50
Short Circuit Protection
Output Over Voltage Protection (refer to block diagram in Application Notes)
Isolation Voltage
Isolation Resistance
Isolation Capacitance (refer to block diagram in Application Notes)
Operating Frequency
Case Temperature
Storage Temperature Range
Over Temperature Protection (refer to block diagram in Application Notes)
RPP50 Operating Temperature Range
Thermal Impedance
(Natural convection
Relative Humidity
Case Material
(6)
Potting Material
Weight
Packing Quantity
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POWERLINE+
DC/DC-Converter
Specifications
(typical at nominal input and 25°C unless otherwise noted)
Safety Standards
Thermal Cycling
Vibration
Conducted Emissions
Radiated Emissions
ESD
Radiated Immunity
Fast Transient
(4)
Surge
(4)
Conducted Immunity
MTBF calculated according to BELLCORE TR-NWT-000332
(5)
RPP50-S
Series
certified UL-60950-1, 1st Edition
complies with MIL-STD-810F
10-55Hz, 12G, 30 Min. along X, Y and Z
EN55022
EN55022
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-6
Class B
Class B
Perf. Criteria B
Perf. Criteria A
Perf. Criteria B
Perf. Criteria B
Perf. Criteria A
1989 x 10
3
hours
Notes :
1. Typical values at nominal input voltage and no load/full load.
2. Typical values at nominal input voltage and full load.
3. The ON/OFF pin voltage is referenced to negative input. The pin is pulled high internally.
ON/OFF control is standard with positive logic: e.g.RPP50-4805S.
Positive logic: 0= OFF, 1 = ON. The converter will be ON if the CTRL is left open.
4. Requires an external 100µF low ESR capacitor to meet EN61000-4-4 and EN61000-4-5
5. Case l: 50% Stress, Temperature at 50°C (Ground Benign).
6. To ensure a good all-round electrical contact, the baseplate is pressed firmly into place within the aluminium housing.The hydraulic press can leave
tooling marks and deformations to both the housing and baseplate. The case is anodised aluminium, so there will be natural variations in the case
colour and the aluminium is not scratch resistant. Any resultant marks, scratches and colour varations are cosmetic only and do not affect the
operation or performance of the converters.
7. Example:
T
case
= Case Temperature
R
thcase-ambient
= 7.3°C/W (vertical)
T
ambient
= Environment Temperature
R
thcase-ambient
= 11°C/W (horizontal)
P
dissipation
= Internal losses
Tcase - Tambient
P
in
= Input Power
R
thcase-ambient
=
Pdissipation
P
out
= Output Power
Pout
Ƞ
= Efficiency under given Operating Conditions
P
dissipation
= Pin-Pout =
Ƞ
- Pout
R
thcase-ambient
= Thermal Impedance
RPP50
P
dissipation
= Pin-Pout =
Practical Example:
Pout
Ƞ
- Pout
Take the RPP50-4805SW with 90% load. What is the maximum ambient operating temperature? Use converter vertical in application.
Eff
min
= 89% @ V
nom
P
out
= 50W
P
outapp
= 50 x 0.9 = 45W
P
dissipation
=
Ƞ
Pout
Ƞ
- P
out
R
th
=
115°C - Tambient
Tcasemax - Tambient
--> 7.3°C/W =
5W
P
dissipation
= ~90% (from Eff vs Load Graph)
45
- 45 = 5W
0.9
T
ambient
= 78.5°C
P
dissipation
=
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REV: 0/2014
PP-39
POWERLINE+
DC/DC-Converter
Typical Characteristics
RPP50-S
Series
-Vout
Trim Up
Trim
Trim Down
+Vout
10k
W
Trimpot
+Vout
10k
W
Trimpot
Trim
10k
W
Trimpot
-Vout
External Output Trimming
Refer to Application Notes for
suggested Resistor Values
RPP50-4805S
100
90
80
70
60
50
40
30
20
10
0
Efficiency VS Load
V
nom
RPP50
Efficiency (%)
0
20
40
60
80
100
Output Load (%)
Recommended PCB Layout
Ribbed Case
Single Output
C1
C2
Fuse
Top View
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DC/DC-Converter
Recommended PCB Layout
RPP50-S
Series
Single Output
Dual Output
Baseplate Case- suggested PCB layout
C2
C1
No tracks
in this area
(42 x 30mm)
C3
C3
Fuse
Top View
Input Fuse is recommended. Recommended fuse rating = double maximum input current, time delay type.
Input Capacitor, C1, is required to meet EN61000 Surge and Fast Transient, otherwise it is not required for normal operation.
Output Capacitors C2/C3 are recommended, but not required for normal operation. Typical capacitor values are 1µF MLCC
To ensure optimum thermal performance, use large areas of copper on the PCB to assist with heat dissipation and mount the converter vertically.
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