20DRW4_2.25 Series
20W - Single Output - Wide Input - Isolated & Regulated
DC-DC Converter
DC-DC Converter
20 Watt
Wide 4:1 input voltage range
Isolation Voltage: 2.25KVDC
Operating Temperature Range:
-40°C to +85°C
Short circuit protection (SCP)
International standard pin-out
Meet the IEC60950, UL60950,
EN60950 approval
High efficiency up to 85%
The 20DRW4_2.25 series are isolated 20W DC-DC products with 4:1 input
voltage. They feature efficiency up to 86%, 2250VDC isolation with
enhanced isolation, operating temperature of -40°C to +85°C,
input under-voltage protection, output short circuit, over-current and
over-voltage protection. Railway vehicle electronic equipment widely
used in 72V, 96V and 110V.
Low ripple & noise
EMI meet EN50121-3-2,
without external components
RoHS Compliance
Over voltage protection
Over load protection
Input under voltage protection
Meets requirements of rail-
way standard EN50155
Common specifications
Short circuit protection:
Cooling:
Output specifications
Continuous, automatic recovery
Free air convection
-40°C~+85°C
Item
Test condition
Min
Typ
1
Max
3
Units
%
Voltage accuracy
Line regulation
Load regulation
0%-100% load
Operation temperature range:
Storage temperature range:
Maximum case temperature:
Solding temperature:
Switching frequency:
Storage humidity range:
Shock and vibration test:
Case material:
Full load, low to high
0%-100% load
0.2
0.5
300
0.5
1
%
-55°C~+125°C
%
105°C
Transient recovery 25% load step change
time
500
µs
300°C MAX, 1.5mm from case for 10sec
300kHz TYP, PWM mode
95% MAX
Transient respon-
se deviation
normal Vin, 25% load
step change
• 3.3V/5V output
• Others
3
3
5
8
%
%
IEC 61373, car body 1 B mold
Aluminum alloy
Temperature
coefficient
0.02
0.03
%/°C
Potting material:
Epoxy (UL94V-0)
Ripple and noise*
Trim
20MHz Bandwidth
50
100
110
mVp-p
%Vo
MTBF (MIL-HDBK-217F @25°C):
Dimensions:
>1,000 Khours
90
Over voltage
protection
Input voltage range
Input voltage range
110
160
%Vo
50.80*25.40*11.80mm
50.80*25.40*16.30mm (heatsink)
Over current
protection
120
210
%Io
Weight:
26g/34g (heatsink)
* 0%-5% load ripple & noise is no more than 5%Vo. Ripple & noise are measured
by ”parallel cable” method, please see DC-DC converter application notes for
specific operation.
Input specifications
Item
Test condition
• 3.3V output
Min Typ
Max
Units
Input current
(full load / no load) • 5V output
• Others
183/10
217/10
214/3
188/20
222/20
219/8
mA
mA
mA
Isolation specifications
Item
Test condition
Min
Typ
Max
Units
Reflected ripple
current
Nominal Vin and full
load
25
mA
Isolation voltage*
• Input-output
2250
VDC
VDC
• Input and output res- 1600
pectively on the shell
Surge voltage
1sec. max.
100% load
-0.7
28
180
40
VDC
VDC
VDC
ms
Starting voltage
Shutdown voltage
Starting time
Isolation resistance
Input-output, test at
500VDC
1000
MΩ
pF
33
10
Isolation capaci-
tance
Input-output,
100KHz/0.1V
2200
Nominal Vin and
constant resistive
load
* Test time of 1 minute and the leak current lower than 1mA.
Input filter
Hot plug
Pi Type
Unavailable
Example:
Ctrl
• Module switch ON
Ctrl suspended or connected to
TTL high level (3.5-12VDC)
Ctrl pin connected to GND or low
level (0-1.2VDC)
20DRW4_11005S2.25
(the voltage of Ctrl
pin is relative to input
pin GND)
20= 20Watt; D= DIP; R= series; W4= wide input (4:1) 40-160Vin;
5Vout; S= single output; 2.25= 2250VDC
• Module switch OFF
• Input current when
switched OFF
2
7
mA
Note:
1. Only typical model listed. Non-standard models will be different from the above,
please contact us for more details.
2. All specifications are typical at nominal input, full load and 25°C unless
otherwise stated.
3. In this datasheet, all the test methods of indications are based on corporate
standards.
Page 1 of 6
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
20DRW4_2.25 – Rev. 2017-1.1
Specifications subject to change without notice.
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