RDD Series
8 Watts
• Wide Input Range for Railway Applications
• Single and Dual Outputs
• DIP24 Package
• -40 °C to +85 °C Operation
• Full Load at 70 °C Ambient
• 3000 VDC Isolation
• MTBF >800 kHrs
• 3 Year Warranty
• EN50155 Approval for Railway Applications
• EN50121-3-2 EMC for Railway Applications
DC-DC Converter
xxx Series
Dimensions:
RDD:
1.25 x 0.80 x 0.42” (31.8 x 20.3 x 10.7 mm)
Models & Ratings
Input Voltage
Output
Voltage
3V3
5V
12 V
13-70 V
15 V
±5 V
±12 V
±15 V
3V3
5V
12 V
42-176 V
15 V
±5 V
±12 V
±15 V
Output Current
2400 mA
1600 mA
665 mA
535 mA
±800 mA
±335 mA
±265 mA
2400 mA
1600 mA
665 mA
535 mA
±800 mA
±335 mA
±265 mA
Overvoltage level
3.9 V
6.2 V
15 V
18 V
±6.2 V
±15 V
±18 V
3.9 V
6.2 V
15 V
18 V
±6.2 V
±15 V
±18 V
Input current
No Load
Full Load
(1)
Maximum
capacitive load
1330 µF
1330 µF
330 µF
220 µF
±900 µF
±220 µF
±100 µF
1330 µF
1330 µF
330 µF
220 µF
±900 µF
±220 µF
±100 µF
Efficiency
83%
86%
85%
86%
83%
85%
86%
81%
84%
84%
83%
80%
82%
83%
(2)
Model Number
RDD0824S3V3
RDD0824S05
RDD0824S12
RDD0824S15
RDD0824D05
RDD0824D12
RDD0824D15
RDD08110S3V3
RDD08110S05
RDD08110S12
RDD08110S15
RDD08110D05
RDD08110D12
RDD08110D15
30 mA
20 mA
10 mA
10 mA
10 mA
10 mA
10 mA
10 mA
10 mA
5 mA
5 mA
5 mA
5 mA
5 mA
398 mA
388 mA
392 mA
389 mA
402 mA
395 mA
386 mA
89 mA
87 mA
87 mA
88 mA
91 mA
90 mA
88 mA
Notes
1. Input currents measured at nominal input voltage.
2. Typical value at full load and nominal input
Mechanical Details
Pin Connections
Pin
Single
Dual
1 Remote On/Off Remote On/Off
0
2
-Vin
-Vin
3
-Vin
-Vin
9
No Pin
Common
11
N.C.
-Vout
14
+Vout
+Vout
16
-Vout
Common
22
+Vin
+Vin
23
+Vin
+Vin
Notes
1. All dimensions are in inches (mm)
2. Weight: 0.039 lbs (18 g) approx.
3. Pin diameter: 0.02±0.002 (0.5±0.05)
4. Pin pitch tolerance: ±0.014 (±0.35)
5. Case tolerance: ±0.02 (±0.5)
1.25
(31.75)
12
3
0.90
0
(22.86)
9
11
0
0.80
(20.32)
DIA
0.02
(0.50)
23
Bottom View
22
16
14
0
0.60
(15.24)
0.42 (10.70)
0.12 (3.05) Min.
0.10
(2.54)
N
0
0.20
(5.08)
1
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RDD Series
Input
Characteristic
Input Voltage Range
Input Filter
Input Reflected Ripple Current
Input Surge
Minimum
13
42
Pi type
20
100
185
Typical
Maximum
70
176
DC-DC Converter
Units
VDC
VDC
mA pk-pk
VDC for 1000 ms
VDC for 1000 ms
Notes & Conditions
24 V nominal
110 V nominal
Through 12 µH inductor and 33 µF capacitor
24 V models
110 V models
Output
Characteristic
Output Voltage
Initial Set Accuracy
Minimum Load
Line Regulation
Load Regulation
Cross Regulation
Ripple & Noise
Short Circuit Protection
Maximum Capacitive Load
Temperature Coefficient
Overload Protection
Overvoltage Protection
Remote On/Off
Start Up Time
Output turns off if remote on/off (pin 1) is shorted to -Vin (pin 2,3)
Output is on if remote on/off (pin 1) is open or >3 V
30
40
ms
Nominal Vin and constant resistive load
160
0.02
%/ ˚C
%
Of nominal output current
See Models and Ratings table
0
±0.5
±0.5
±5
75
Minimum
3.3
Typical
Maximum
15
±1
Units
VDC
%
%
%
%
%
mV pk-pk
From 0% to full load
On dual output models, when one output is at 25% load
and other is varied from no load to full load
20 MHz bandwidth. Measured using 0.1 µF ceramic capacitor
Continuous hiccup mode, with auto recovery
See Models and Ratings table
Notes & Conditions
See Models and Ratings table
At 70% load
Minimum load required to meet specification. Operation at
no load will not cause damage.
General
Characteristic
Efficiency
Isolation: Input to Output
Switching Frequency
Isolation Resistance
Isolation Capacitance
Power Density
Mean Time Between Failure
Weight
800
0.039 (18)
10
9
1000
14
Minimum
80
3000
330/220
Typical
Maximum
86
Units
%
VDC
kHz
pF
Win
3
kHrs
lb (g)
MIL-HDBK-217F, +25 °C GB
Ω
24 V / 110 V models
Notes & Conditions
See Models and Ratings table
Environmental
Characteristic
Operating Temperature
Storage Temperature
Case Temperature
Humidity
Cooling
Minimum
-40
-55
Typical
Maximum
+85
+125
+105
95
Units
°C
°C
°C
%RH
Non-condensing
Natural convection
Notes & Conditions
Derate from 100% load at +70 °C to 50% at +85 °C
Safety Approvals
Safety Agency
EN
Safety Standard
EN50155
Railway Applications
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2
RDD Series
EMC: Emissions
Phenomenon
Conducted
EN50121-3-2
Radiated
Standard
Test Level
DC-DC Converter
Notes & Conditions
RDD0824 models also meet EN55022 Class A. See
application note to meet EN55022 Class A for RDD08110
models.
0.15-0.50 MHz, 99 dB µV
0.50-30.0 MHz, 93 dB µV
30.0-230.0 MHz, 40 dB µV
230.0-1000.0 MHz, 47 dB µV
EMC: Immunity
Phenomenon
ESD Immunity
Radiated Immunity
EFT/Burst
Surges
Conducted Immunity
Magnetic Fields
Standard
EN50121-3-2
EN50121-3-2
EN50121-3-2
EN50121-3-2
EN50121-3-2
EN61000-4-8
Test Level
Air ±8 kV, Contact ±6 kV
20 Vrms/m
2 kV
2 kV
10 V
10 A/m
Criteria
A
A
A
A
A
A
External input capacitor required, see application note
External input capacitor required, see application note
Notes & Conditions
Mechanical Details
Pin Connections
Pin
Single
Dual
1 Remote On/Off Remote On/Off
0
2
-Vin
-Vin
3
-Vin
-Vin
9
No Pin
Common
11
N.C.
-Vout
14
+Vout
+Vout
16
-Vout
Common
22
+Vin
+Vin
23
+Vin
+Vin
Notes
1. All dimensions are in inches (mm)
2. Weight: 0.039 lbs (18 g) approx.
3. Pin diameter: 0.02±0.002 (0.5±0.05)
L
4. Pin pitch tolerance: ±0.014 (±0.35)
5. Case tolerance: ±0.02 (±0.5)
1.25
(31.75)
12
3
0.90
0
(22.86)
9
11
0
0.80
(20.32)
DIA
0.02
(0.50)
23
Bottom View
22
16
14
0.60
0
(15.24)
0.42 (10.70)
0.12 (3.05) Min.
0.10
(2.54)
N
0
0.20
(5.08)
Application Note
External Filter for Surge and EFT
EMI Filter for RDD08110 models
+ Vout
+ Vin
C1
C2
+ Vin
+ Vout
RDD
Load
C1
C2
C3
RDD
Load
-Vin
-Vout
-Vin
-Vout
For RDD0824 models, C1 = 330 µF, 100 V and C2 not fitted
For RDD08110 models, C1 and C2 = 100 µF, 250 V
C1, C2, & C3 are 1 µF, 250 V multilayer ceramic Chip Capacitor, placed as close
as possible to the input pins
3
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25 Oct 17
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