WRB_SP-2W Series
2W, WIDE INPUT, SINGLE OUTPUT
DIP PACKAGE DC-DC CONVERTER
FEATURES
● 2:1 wide input voltage range
● Operating temperature: -40°C ~+85°C
● 1.5KVDC isolation
● Metal shielding package
● No heat sink required
● Short circuit protection
● Industry standard pinout
● MTBF>1,000,000 hours
● RoHS Compliance
Patent Protection
RoHS
PRODUCT PROGRAM
Input
Part
Number
WRB1205SP-2W
WRB2405SP-2W
12
24
Voltage (VDC)
Nominal
Range
9-18
18-36
Max.*
22
40
Voltage
(VDC)
5
5
Output
Current (mA)
Max.
400
400
Min.
40
40
71/73
75/77
Efficiency
(%, Min./Typ.)
Note:1.*Input voltage can’t exceed this value, or will cause the permanent damage.
ISOLATION SPECIFICATIONS
Item
Isolation voltage
Isolation resistance
Test conditions
Tested for 1 minute and 1mA max
Test at 500VDC
Min.
1500
1000
47
Typ.
Max.
Units
VDC
MΩ
pF
APPLICATIONS
The WRB_SP-2W series are specially
designed for applications where a wide range
input voltage power supplies are isolated from
the input power supply in a distributed power
supply system on a circuit board. These
products apply to:
1) Where the voltage of the input power
supply is wide range (voltage range ≤ 2:1);
2) Where isolation is necessary between input
and output(isolation voltage ≤1500VDC);
3) Where the regulation of the output voltage
and the output ripple noise are demanded.
Isolation capacitance Input/Output,
100KHz/1V
COMMON SPECIFICATIONS
Item
Storage humidity
Operating temperature
Storage temperature
Lead temperature
No-load Power
Cooling
Short circuit protection
Case material
MTBF
Weight
1.5mm from case for 10 seconds
0.15
Free air convection
Continuous, automatic recovery
Copper, Nickel Plated
1000
14
K hours
g
-40
-55
Test conditions
Min.
Typ.
Max.
95
85
125
300
W
°C
Units
%
MODEL SELECTION
WRB2405SP-2W
MORNSUN Science & Technology Co.,Ltd.
Address: No. 5, Kehui St. 1, Kehui
development center, Science Ave., Guangzhou
Science City, Luogang district,
Guangzhou,P.R.China.
Tel: 86-20-38601850
Fax:86-20-38601272
Http://www.mornsun-power.com
Rated power
Package style
Output voltage
Input voltage
Product series
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
Specifications subject to change without notice.
WRB_SP-2W
B/0-2015
Page 1 of 2
OUTPUT SPECIFICATIONS
Item
Output power
Load regulation
Line regulation
Temperature drift(Vout)
Ripple & Noise*
Switching frequency
Test conditions
See above products program
From 10% to 100% load
Input voltage from low to high
Refer to recommended circuit
20MHz Bandwidth
100% load, input voltage range
50
300
Min.
0.2
±1
±0.5
±0.2
Typ.
Max.
2
±3
±1
±0.5
±0.03
100
%/°C
mVp-p
KHz
%
Units
W
TYPICAL CHARACTERISTICS
Temperature Derating Graph
Positive voltage accuracy Refer to recommended circuit
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Operating Temp.(
C
)
APPLICATION NOTE
1) Requirement On Output Load
In order to ensure the product operate efficiently and reliably, in addition to a max load (namely
full load), a minimum load is specified for this kind of DC/DC converter. Make sure the specified
range of input voltage is not exceeded, the minimum output load no less than 10% load. If the
actual load is less than the specified minimum load, the output ripple may increase sharply while
its efficiency and reliability will reduce greatly. If the actual output power is very small, please add
an appropriate resistor as extra loading, or contact our company for other lower output power
products.
2) Recommended Circuit
All the WRB_SP-2W series have been tested according to the following recommended testing
circuit before leaving factory (Figure 1).
If you want to further decrease the input/output ripple, you can increase capacitance properly or
choose capacitors with low ESR. However, the capacitance of the output filter capacitor must be
proper. If the capacitance is too big, a startup problem might arise. For every channel of output,
provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor
sees (Table 1). General:
Cin: 12V 100μF
24V 10μF~47μF
Cout: 10μF/100mA
3) Input Current
When it is used in unregulated power supply, be sure that the fluctuating range of the power
supply and the rippled voltage do not exceed the module standard. Input current of power supply
should afford the startup current of this kind of DC/DC module (See figure 2),
General: Vin=12V lave =439mA
Vin=24V lave =208mA
4) No parallel connection or plug and play
RECOMMEDED CIRCUIT
Vin
Cin
+Vo
DC
DC
Cout
GND
0V
(Figure 1)
Input Current(A)
Iave
Input Voltage
scope
Input Voltage (V)
(Figure 2)
Output External Capacitor Table(Table 1)
Single
Vout
(VDC)
5
Cout
(μF)
1000
OUTLINE DIMENSIONS & PIN CONNECTIONS
Note:
1.Packing Information please refer to 'Product Packing Information'. The Packing bag number of Horizontal package : 58210011;
2.Recommend to use module with more than 10% load, if not, the ripple of the product may exceeds the specification, but does not affect the reliability of the product;
3.Operation under 10% load will not damage the converter; However, they may not meet all specification listed.
4. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
5.In this datasheet, all the test methods of indications are based on corporate standards.
6.Only typical models listed, other models may be different, please contact our technical person for more details.
The copyright and authority for the interpretation of the products are reserved by
MORNSUN
Specifications subject to change without notice.
WRB_SP-2W
B/0-2015
Page 2 of 2
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