RDE20 Series
20 Watts
• Regulated Single & Dual Output
• 24-48 VDC & 72-110 VDC nominal inputs for Railway Applications
• 3000 VDC Isolation
• High Efficiency
• EN50155 Certified for Railway Applications
• EN50121-3-2 with External Components
• Remote On/Off
• Output Voltage Trim ±10%
• Operating Temperature -40 °C to +100 °C
• Full Power to +55 °C
• 3 Year Warranty
DC-DC Converter
xxx Series
Dimensions:
RDE20:
1.0 x 1.0 x 0.41” (25.4 x 25.4 x 10.4 mm)
The RDE20 series provides a comprehensive wide DC input voltage range covering all requirements of the railway standard EN50155. The product
features a robust design tested to railway standards and includes a remote on /off function, output voltage trimming, protection against short
circuit, undervoltage lockout, overload and overvoltage.
Models & Ratings
Input voltage
Output voltage
3.3 V
5.0 V
12.0 V
15.0 V
±5.0 V
±12.0 V
±15.0 V
3.3 V
5.0 V
12.0 V
15.0 V
±5.0 V
±12.0 V
±15.0 V
Output current
4500 mA
4000 mA
1670 mA
1330 mA
±2000 mA
±833 mA
±666 mA
4500 mA
4000 mA
1670 mA
1330 mA
±2000 mA
±833 mA
±666 mA
Input current
(1)
No load
Full load
711.20 mA
946.96 mA
936.33 mA
925.92 mA
968.99 mA
925.92 mA
925.92 mA
156.97 mA
206.61 mA
211.41 mA
211.41 mA
216.45 mA
208.98 mA
208.98 mA
Maximum
capacitive load
7000 µF
5000 µF
850 µF
700 µF
±1000 µF
±680 µF
±470 µF
7000 µF
5000 µF
850 µF
700 µF
±1000 µF
±680 µF
±470 µF
Efficiency
87%
88%
89%
90%
86%
90%
90%
86%
88%
86%
86%
84%
87%
87%
Model number
RDE2024S3V3
RDE2024S05
RDE2024S12
RDE2024S15
RDE2024D05
RDE2024D12
RDE2024D15
RDE20110S3V3
RDE20110S05
RDE20110S12
RDE20110S15
RDE20110D05
RDE20110D12
RDE20110D15
13-70 VDC
10 mA
42-176 VDC
10 mA
Notes
1. Input current measured at nominal input voltage.
2. For heatsink add suffix ‘-HK’, e.g. RDE2024S15-HK
Mechanical Details
0.4
0.4
(10.16) (10.16)
0.41
(10.4)
0.66
(16.8)
Optional
Heatsink (-HK)
1.0
(25.4)
1.0
(25.4)
0.02
(0.5)
1.0
(25.4)
Top View
0.8
(20.32)
Bottom View
0.6
(15.24)
ø
0.04
(1.0)
Pin Connections
Pin Single Output Dual Output
1
+Vin
+Vin
2
-Vin
-Vin
3
Control
Control
4
+Vout
+Vout
5
Trim
Com
6
-Vout
-Vout
Notes
1.0 (25.4)
0.2
1.0
(5.08)
(25.4)
0.3
(7.62)
1.0
(25.4)
0.24
(6.0)
1. All dimensions are in inches (mm)
1
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RDE20 Series
Input
Characteristic
Input Voltage Range
Input Filter
Input Voltage Surge
Undervoltage Lockout
Remote On/Off
(Positive Logic)
Standby Current
OFF at <11.6 V, ON at 12.3 V
OFF at <38.4 V, ON at 40.5 V
ON at 3.0 VDC to 12.0 VDC or open circuit
OFF at 0 VDC to 1.2 VDC or short pin 2 to pin 3
3
Minimum
13
42
Internal Pi type
100
185
Typical
Maximum
70
176
DC-DC Converter
Units
VDC
Notes & Conditions
24 V, 37.5 V, 48 V nominal inputs
72 V, 96 V & 110 V nominal inputs
RDE2024 series
RDE20110 series
RDE2024 series
RDE20110 series
Positive logic reference to -Vin (pin 2)
VDC for 100 ms
mA
When module inhibited
Output
Characteristic
Output Voltage
Output Trim
Initial Set Accuracy
Minimum Load
Line Regulation
Load Regulation
Cross Regulation
Transient Response
Ripple & Noise
Overvoltage Protection
Overload Protection
Short Circuit Protection
Maximum Capacitive Load
Temperature Coefficient
0.02
%/ ˚C
120
170
±3
±0.5
±0.5/±1.0
±5.0
±5
75
Minimum
3.3
Typical
Maximum
30
±10
±1.0
Units
VDC
%
%
A
%
%
%
% deviation
mV pk-pk
%
%
Continuous trip & restart (hiccup mode), with auto recovery
See Models and Ratings table
Notes & Conditions
See Models and Ratings table
Single output models only
At full load
No minimum load required
From minimum to maximum input at full load
From 0 to full load. Single Output/Dual Output
On dual output models when one load is varied between
25% and 100% and other is fixed at 100%
Recovery within 1% in less than 250 µs for a 25% load
change.
20 MHz bandwidth. Measured using external 10 µF MLCC
General
Characteristic
Efficiency
Isolation: Input to Output
Isolation Resistance
Isolation Capacitance
Switching Frequency
Power Density
Mean Time Between Failure
Case Material
Potting Material
Fire Protection
PCB Pin Material
190
Epoxy UL94V-0
Designed to meet EN45545-2
Minimum
84
3000
10
9
Typical
Maximum
90
Units
%
VDC
pF
kHz
Ω
Notes & Conditions
See Models and Ratings table
60 s functional isolation
At 3 kVDC
RDE2024 / 110 series
2000
330 / 245
48.8
W/in
3
khrs
MIL-HDBK-217F, +25 °C GB
Copper Case, Non conductive black plastic base, UL94V-0 rated
ø1.0
mm brass, solder coated
Lead Free Reflow Solder Process IPC JEDEC J-STD 020D.1. 260 °C max. 1.5 mm from case. 10 s max.
Weight
0.041 (19.0)
0.048 (22.0)
lb (g)
Standard
With heatsink
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2
RDE20 Series
Environmental
Characteristic
Operating Temperature
Maximum Case Temperature
Thermal Impedance to Air
Storage Temperature
Altitude
Humidity
Cooling
Dry Heat
Damp Heat
Shock & Vibration
IEC/EN 60068-2-1
IEC/EN 60068-2-2
IEC/EN 60068-2-30
IEC/EN 61373
13
12
-55
5000 m operation
95
+125
Minimum
-40
Typical
Maximum
+100
+105
DC-DC Converter
Units
°C
°C
°C/W
°C
%RH
Notes & Conditions
See derating curve
Without heatsink
With heatsink
Non-condensing
EMC: Emissions
Phenomenon
Railway Equipment
Standard
EN50121-3-2
Test Level
Notes & Conditions
Conducted and Radiated
EMC: Immunity
Phenomenon
Railway Equipment
ESD
Radiated
EFT/Burst
Surge
Conducted
Magnetic Fields
Standard
EN50121-3-2
EN50121-3-2
EN50121-3-2
EN50121-3-2
EN50121-3-2
EN50121-3-2
EN61000-4-8
±8 kV air discharge, ±6 kV contact
20 V/m
±2 kV
±2 kV
10 V rms
100 A/m
A
A
A
A
A
A
With external capacitor
Suggested parts are
24V: CHEMI-CON KY 330 µF/100 V
110V: BXF SERIES 100 µF/250 V in parallel
See application note
Test Level
Criteria
Notes & Conditions
Electromagnetic compatibility for rolling stock
apparatus
Safety Approvals
Safety Agency
IEC
Safety Standard
IEC60950-1/IEC62368-1
Notes & Conditions
ITE
Safety Agency
EN
Safety Standard
EN50155
Notes & Conditions
Railway Applications, Electronic Equipment used on Rolling Stock
3
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RDE20 Series
Application Notes
Remote On/Off - Single Output
1 +Vin
+Vout 4
DC-DC Converter
Remote On/Off - Dual Output
1 +Vin
+Vout 4
Load
3 Ctrl
Load
3 Ctrl
5
Common
Load
2 -Vin
-Vout 6
2 -Vin
-Vout 6
Positive logic. Module turns on with logic high. Logic low turns module off. On/Off is enabled by an external switch between the control pin 3 and
-Vin pin 2, e.g. open collector or drain. If the Remote On/Off is not used leave pin 3 floating.
EMC - 110 V Input Models Only
L1
1 +Vin
+Vout 4
Output Voltage Trim - Single Output Models Only
+Vout 4
Rd
Load
Trim 5
Ru
Trim up
Trim down
C1 x 6
2 -Vin
-Vout 6
-Vout 6
(MLCC type)
C1
1 µF, 250 V
L1
12 µH
Not required for RDE2024 series
Trim Tables
Trim Down %
1
2
3
4
5
6
7
8
9
10
3.3 V
817.535
362.230
215.448
142.957
99.747
71.057
50.622
35.326
23.448
13.957
12 V
Rd (kΩ)
117.886
345.033
61.634
164.830
38.388
98.862
25.688
64.647
17.684
43.707
12.179
29.571
8.159
19.386
5.096
11.699
2.683
5.692
0.735
0.867
5V
15 V
174.366
91.104
56.589
37.706
25.796
17.598
11.611
7.047
3.453
0.548
Trim Up%
1
2
3
4
5
6
7
8
9
10
3.3 V
567.584
263.172
158.473
105.497
73.508
52.096
36.760
25.235
16.257
9.066
12 V
Ru (kΩ)
616.020
1015.590
221.402
448.881
131.336
280.558
91.426
199.789
68.900
152.361
54.432
121.162
44.353
99.078
36.930
82.625
31.235
69.892
26.727
59.745
5V
15 V
661.510
231.250
134.015
91.042
66.818
51.270
40.445
32.475
26.362
21.524
Derating Curve
100%
Output Power (%)
75%
50%
25%
-40
-20
0
20
40
55
With heat-sink
Without heat-sink
Ambient Temperature (ºC)
59
60
80
100
120
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14 Jan 19
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