The RPP40 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 RPP40 is available in two case styles: the ribbed case and the base-
plate case for high vibration, bulkhead-mounting or for passive cooling applications. They are UL-60950-1 certified.
40 Watt
2:1 Single
&
Dual 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
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
±12
±15
±24
±12
±15
±24
Output
Current
A
12
8
3.33
2.67
1.67
12
8
3.33
2.67
1.67
±1.67
±1.33
±0.84
±1.67
±1.33
±0.84
Efficiency
(2)
(Typ.)
87%
89%
87%
88%
88%
88%
89%
87%
88%
88%
87%
88%
88%
87%
88%
88%
2011/65/EU
6/6
RPP40-243.3S
RPP40-2405S
RPP40-2412S
RPP40-2415S
RPP40-2424S
RPP40-483.3S
RPP40-4805S
RPP40-4812S
RPP40-4815S
RPP40-4824S
RPP40-2412D
RPP40-2415D
RPP40-2424D
RPP40-4812D
RPP40-4815D
RPP40-4824D
RoHS
UL-60950-1 Certified
E224736
RPP40
* 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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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.)
RPP40-S_D
Series
9-36VDC
18-75VDC
17.5VDC
17VDC
35VDC
34VDC
Common Mode EMC Filter
24V Input
48V Input
nominal Vin and full load
nominal Vin and constant resistor load
Logic High
Logic Low
Nominal input
5V/ms max
50VDC
100VDC
30mAp-p
2ms typ., 5ms max.
Open or 3.0V < Vr < 5.5V
Short or 0V < Vr < 1.2V
2mA typ.
50W max.
10% Load and nominal Vin
±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.
Power Limit, 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
+120°C
-55°C to +125°C
internal thermistor
Ambient, Free Convection
Ribbed Case: Vertical
Ribbed Case: Horizontal
-40°C to to see Calculation (Note 7)
7.3°C/Watt
10°C/Watt
5% to 95% RH
Aluminium
Silicone (UL94-V0)
continued on next page
Input Filter
Input Voltage Variation dv/dt (Complies with ETS300 132 part 4.4)
Input Surge Voltage (100 ms max.)
Input Reflected Ripple
Start Up Time
Remote ON/OFF
(4)
Remote OFF input current
Output Power
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
RPP40
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
Case Temperature
Storage Temperature Range
Over Temperature Protection (refer to block diagram in Application Notes)
Operating Temperature Range
Thermal Impedance
(Natural convection
Relative Humidity
Case Material
(7)
Potting Material
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POWERLINE+
DC/DC-Converter
Specifications
(typical at nominal input and 25°C unless otherwise noted)
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)
RPP40-S_D
Series
Ribbed Case
Basrplate Case
Ribbed Case
Baseplate Case
39g
43g
4 pcs per Tube
Single packed
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. Minl 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. RPP40-2405S
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
= 7.5°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
RPP40
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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REV: 0/2014
PP-27
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DC/DC-Converter
Typical Characteristics
RPP40-S_D
Series
Efficiency VS Input Voltage
92
91
90
89
88
87
86
85
84
83
82
RPP40-4805S
RPP40-4805S
Efficiency (%)
36
40
48
52 56
60
Input Voltage (V)
64
68
72
Recommended PCB Layout
Ribbed Case
Single Output
RPP40
C1
C2
Fuse
Top View
Dual Output
C2
C1
C3
Fuse
Top View
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PP-28
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DC/DC-Converter
Recommended PCB Layout
RPP40-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.
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