Features
ICE
Technology*
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115°C Maximum Case Temperature
-40°C Minimum Temp.
Built-in FCC/EN55022 Class B Filter
2:1 Input Voltage Range
Six Sided Shielded Enclosure
Ribbed or Baseplate Case Styles
Min. Efficiency 87%
2kVDC Isolation
Low Quiescent Current
POWERLINE+
DC/DC-Converter
with 3 year Warranty
Description
The RPP20 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 -40°C to +115°C is required. Although the case size is very compact, the
converter contains a built-in filter EN55022 Class B / FCC Level B without the need for
any external components. The RPP20 is available in two case styles: the ribbed case for
active cooling and the baseplate case for high vibration, bulkhead-mounting or for pas-
sive cooling applications. They are UL-60950-1 certified.
20 Watt
2:1 Single
&
Dual Output
Selection Guide
12V, 24V and 48V Input Types
Part Number
Input
Range
VDC
9-18
9-18
9-18
9-18
9-18
18-36
18-36
18-36
18-36
18-36
36-75
36-75
36-75
36-75
36-75
9-18
9-18
9-18
18-36
18-36
18-36
36-75
36-75
36-75
Output
Voltage
VDC
3.3
5
12
15
24
3.3
5
12
15
24
3.3
5
12
15
24
±12
±15
±24
±12
±15
±24
±12
±15
±24
Output
Current
mA
6000
4000
1666
1333
830
6000
4000
1666
1333
830
6000
4000
1666
1333
830
±833
±666
±416
±833
±666
±416
±833
±666
±416
Efficiency
(2)
(Typ.)
88%
89%
88%
88%
88%
88%
89%
88%
89%
89%
88%
89%
89%
88%
88%
88%
88%
88%
88%
89%
88%
88%
88%
87%
2011/65/EU
6/6
RPP20-123.3S**
RPP20-1205S**
RPP20-1212S**
RPP20-1215S**
RPP20-1224S**
RPP20-243.3S**
RPP20-2405S**
RPP20-2412S**
RPP20-2415S**
RPP20-2424S**
RPP20-483.3S**
RPP20-4805S**
RPP20-4812S**
RPP20-4815S**
RPP20-4824S**
RPP20-1212D**
RPP20-1215D**
RPP20-1224D**
RPP20-2412D**
RPP20-2415D**
RPP20-2424D**
RPP20-4812D**
RPP20-4815D**
RPP20-4824D**
RoHS
UL-60950-1 Certified
E224736
RPP20
* ICE Technology
ICE (Innovation in Converter Excellence)
uses state-of-the-art techniques to mini-
mise 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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DC/DC-Converter
Specifications
(typical at nominal input and 25°C unless otherwise noted)
Input Voltage Range
12V nominal input
24V nominal input
48V nominal input
Under Voltage Lockout
12V input
24V input
48V input
Input Voltage Variation dv/dt (Complies with ETS300 132 part 4.4)
Input Surge Voltage (100 ms max.)
Start Up Time
Remote ON/OFF
(4)
Remote OFF input current
Output Power
Output Voltage Accuracy
Voltage Adjustability
Minimum Load
Line Regulation
Load Regulation
Cross Regulation (10% <>100% Load)
Ripple and Noise (20MHz bandwith limited)
(measured with 1µF capacitor across outputs)
Temperature Coefficient
Transient Response
Over Load Protection
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
Operating Temperature Range
Maximum Case Temperature
Storage Temperature Range
Over Temperature Protection (refer to block diagram in Application Notes)
Thermal Impedance
(Natural convection)
Relative Humidity
Case Material
(7)
Potting Material
Ribbed Case: Vertical
Ribbed Case: Horizonzal
Ambient, Free Convection
25% load step change
% of full load at nominal Vin
low line, high line at full load
10% to 100% full load
Dual Outputs only
3.3V, 5V
All others
50% Load and nominal Vin
Single Output only
12V, 24V Input
48V Input
DC-DC ON (min.)
DC-DC OFF (max.)
DC-DC ON (min.)
DC-DC OFF (max.)
DC-DC ON (min.)
DC-DC OFF (max.)
RPP20-S_D
Series
9-18VDC
18-36VDC
36-75VDC
8.5VDC
8VDC
17.5VDC
17VDC
35VDC
34VDC
5V/ms max
50VDC
100VDC
20ms typ., 50ms max.
Open or 3.0V < Vr < 5.5V
Short or 0V < Vr < 1.2V
2mA typ.
20W
±1.5%
±10%
0%
±0.3%
±0.5%
3% typ. / 5% max.
100mVp-p typ.
1% p-p Vout typ.
±0.04%/°C max.
800µs
120% typ.
Power Limit, automatic recovery
Converter shutdown if Vout > Vout nominal + 20% typ-
Rated at 1600VDC/1 minute, Flash tested at 2000VDC/1 second
10MΩ min.
1500pF max.
260kHz ± 40kHz
-40°C to see Calculation (Note 7)
+115°C
-55°C to +125°C
internal thermistor
7.5°C/Watt
11.5°C/Watt
5% to 95% RH
Aluminium
Silicone (UL94-V0)
continued on next page
nominal Vin and constant resistor load
Logic High
Logic Low
Nominal input
RPP20
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POWERLINE+
DC/DC-Converter
Specifications
(cont.)
Weight
Packing Quantity
Safety Standards
Thermal Cycling
Vibration
Conducted Emissions
Radiated Emissions
ESD
Radiated Immunity
Fast Transient
(5)
Surge
(5)
Conducted Immunity
MTBF calculated according to BELLCORE TR-NWT-000332
(6)
EN55022
EN55022
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-6
Ribbed Case
Baseplate Case
Ribbed Case
Baseplate Case
RPP20-S_D
Series
26g
43g
5pcs per Tube
4pcs per Tube
certified UL-60950-1, 1st Edition
complies with MIL-STD-810F
10-55Hz, 12G, 30 Min. along X, Y and Z
Class B
Class B
Perf. Criteria B
Perf. Criteria A
Perf. Criteria B
Perf. Criteria B
Perf. Criteria A
2195 x 10
3
hours
Notes :
1. Typical values at nominal input voltage and no load/full load.
2. Min. 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. RPP20-2405S, RPP20-4805D-B.
Pos. 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 bottom plate is pressed firmly into place into the aluminium case.The hydraulic press can leave
tooling marks and deformations to both the case and plate. 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
= 7.5°C/W (vertical)
T
ambient
= Environment Temperature
R
thcase-ambient
= 11.5°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
RPP20
P
dissipation
= Pin-Pout =
Practical Example:
Pout
Ƞ
- Pout
Take the RPP20-1205S with 50% load. What is the maximum ambient operating temperature? Use converter vertical in application.
Eff
min
= 89% @ V
nom
P
out
= 20W
P
outapp
= 20 x 0.5 = 10W
P
dissipation
=
Ƞ
Pout
Ƞ
- P
out
R
th
=
115°C - Tambient
Tcasemax - Tambient
--> 7.5°C/W =
1.36W
P
dissipation
= ~88% (from Eff vs Load Graph)
10
- 10 = 1.36W
0.88
T
ambient
= 104.8°C
P
dissipation
=
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PP-3
POWERLINE+
DC/DC-Converter
Typical Characteristics
RPP20-S_D
Series
RPP20-1209S
Efficiency VS Output Load
100
80
Efficiency (%)
60
40
20
0
0
0.5
1
1.5
2
2.5
3
3.5
4
Output Load (%)
Recommended PCB Layout
Ribbed Case
Single Output
RPP20
C1
C2
Fuse
Top View
Dual Output
C2
C1
C3
Fuse
Top View
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POWERLINE+
DC/DC-Converter
Recommended PCB Layout
RPP20-S_D
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.
Package Style and Pinning (mm)
RPP20
Ribbed Case (Standard - no suffix)
41
11.70
dia.
1.0
10.20
20.30
3.3
5.1 +/- 0.9
2.50
5.10
26
Standoff
= 1.3
Pin Connections
Bottom View
1
2
6
3
10.20
4
10.20
5
12.70
Pin #
1
2
3
4
5
6
Single
+Vin
-Vin
+Vout
Trim
-Vout
CTRL
Dual
+Vin
-Vin
+Vout
Com
-Vout
CTRL
Pin Pitch Tolerance ±0.35 mm
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PP-5
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