DC/DC Converter
A_S-2WR2 & B_S-2WR2 series
2020.04.13-A/9 Page 1 of 6
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2W isolated DC-DC converter
Fixed input voltage, unregulated single or dual output
CB Patent Protection RoHS
FEATURES
High power density
High efficiency up to 86%
Operating ambient temperature range: -40℃to
+105℃
No external components required
Miniature SIP package
Industry standard pin-out
I/O isolation test voltage 1.5k VDC
IEC60950/UL60950/EN60950 Approved
A_S-2WR2 & B_S-2WR2 series is designed for use in distributed power supply systems and especially suitable in applications such as pure
digital circuits, low frequency analog circuits, relay-driven circuits and data switching circuits, where:
1. The voltage of the input power supply is relatively stable with a variation of ±10%Vin or less;
2. An input to output isolation voltage of up to 1500VDC is necessary;
3. The requirement for a tight output regulation is not as strict.
Selection Guide
Certification
Part No.
Input Voltage (VDC)
Output
Capacitive
Load*(µF)
Max.
Nominal
(Range)
Voltage
(VDC)
Current (mA)
Max./Min.
--
A0503S-2WR2
5
(4.5-5.5)
±3.3
±303/±30
100
UL/CE/CB
A0505S-2WR2
±5
±200/±20
A0509S-2WR2
±9
±111/±11
A0512S-2WR2
±12
±83/±8
A0515S-2WR2
±15
±67/±7
A0524S-2WR2
±24
±42/±4
--
B0503S-2WR2
3.3
400/40
220
UL/CE/CB
B0505S-2WR2
5
400/40
B0509S-2WR2
9
222/22
B0512S-2WR2
12
167/17
B0515S-2WR2
15
133/13
B0524S-2WR2
24
83/8
--
B0905S-2WR2
9
(8.1-9.9)
5
400/40
B0912S-2WR2
12
167/17
UL/CE/CB
A1205S-2WR2
12
(10.8-13.2)
±5
±200/±20
100
A1209S-2WR2
±9
±111/±11
A1212S-2WR2
±12
±83/±8
A1215S-2WR2
±15
±67/±7
A1224S-2WR2
±24
±42/±4
--
B1203S-2WR2
3.3
400/40
220
UL/CE/CB
B1205S-2WR2
5
400/40
B1209S-2WR2
9
222/22
B1212S-2WR2
12
167/17
B1215S-2WR2
15
133/13
B1224S-2WR2
24
83/8
--
A1505S-2WR2
15
(13.5-16.5)
±5
±200/±20
100
A1515S-2WR2
±15
±67/±7
DC/DC Converter
A_S-2WR2 & B_S-2WR2 series
2020.04.13-A/9 Page 2 of 6
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--
B1505S-2WR2
15
(13.5-16.5)
5
400/40
220
B1515S-2WR2
15
133/13
B1524S-2WR2
24
83/8
A2403S-2WR2
24
(21.6-26.4)
±3.3
±303/±30
100
UL/CE/CB
A2405S-2WR2
±5
±200/±20
A2409S-2WR2
±9
±111/±11
A2412S-2WR2
±12
±83/±8
A2415S-2WR2
±15
±67/±7
A2424S-2WR2
±24
±42/±4
--
B2403S-2WR2
3.3
400/40
220
UL/CE/CB
B2405S-2WR2
5
400/40
B2409S-2WR2
9
222/22
B2412S-2WR2
12
167/17
B2415S-2WR2
15
133/13
B2424S-2WR2
24
83/8
Note: * The specified maximum capacitive load for positive and negative output is identical.
Input Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Input Current
(full load / no-load)
5V input
--
506/35
--/60
mA
9V input
--
268/25
--/50
12V input
--
208/20
--/50
15V input
--
167/15
--/35
24V input
--
104/10
--/30
Reflected Ripple Current
--
15
--
mA
Surge Voltage (1sec. max.)
5V input
-0.7
--
9
VDC
9V input
-0.7
--
12
12V input
-0.7
--
18
15V input
-0.7
--
21
24V input
-0.7
--
30
Input Filter
Capacitance filter
Hot Plug
Unavailable
Output Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Voltage Accuracy
See output regulation curve(Fig. 1)
Linear Regulation
Input
voltage
change:
±1%
3.3VDC output
--
--
±1.5
--
Other output
--
--
±1.2
Load Regulation
10%-100%
load
3.3VDC output
--
18
--
%
5VDC output
--
12
--
9VDC output
--
9
--
12VDC output
--
8
--
15VDC output
--
7
--
24VDC output
--
6
--
Ripple & Noise*
20MHz bandwidth
--
75
200
mVp-p
Temperature Coefficient
Full load
--
--
±0.03
%/℃
DC/DC Converter
A_S-2WR2 & B_S-2WR2 series
2020.04.13-A/9 Page 3 of 6
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Short-circuit Protection**
A24xxS-2WR2/B24xxS-2WR2
A12xxS-2WR2/B12xxS-2WR2
A15xxS-2WR2/B15xxS-2WR2
A0524S-2WR2/B0524S-2WR2
--
--
1
s
Others
Continuous, self-recovery
Notes: * The “parallel cable” method is used for ripple and noise test, please refer to DC-DC Converter Application Notes for specific information.
** At the end of the short circuit duration, the supply voltage must be disconnected from following models:
A24xxS-2WR2/B24xxS-2WR2/A12xxS-2WR2/B12xxS-2WR2/A15xxS-2WR2/B15xxS-2WR2 series, and A0524S-2WR2/B0524S-2WR2.
General Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Isolation Voltage
Input-output Electric strength test for 1 minute with a
leakage current of 1mA max.
1500
--
--
VDC
Insulation Resistance
Input-output resistance at 500VDC
1000
--
--
MΩ
Isolation Capacitance
Input-output capacitance at 100kHz/0.1V
--
20
--
pF
Operating Temperature
Derating when operating temperature up to 85℃, (see
Fig. 2)
-40
--
105
℃
Storage Temperature
-55
--
125
Case Temperature Rise
Ta=25℃, nominal input, full load output
--
25
--
Pin Soldering Resistance Temperature
Soldering spot is 1.5mm away from case for 10 seconds
--
--
300
Storage Humidity
Non-condensing
--
--
95
%RH
Switching Frequency
Full load, nominal input voltage
--
100
--
kHz
MTBF
MIL-HDBK-217F @ 25℃
3500
--
--
k hours
Mechanical Specifications
Case Material
Black plastic; flame-retardant and heat-resistant (UL94 V-0)
Dimensions
19.65 x 7.05 x 10.16mm
Weight
2.4g (Typ.)
Cooling Method
Free air convection
Electromagnetic Compatibility (EMC)
Emission
CE
CISPR32/EN55032 CLASS B (see Fig. 4 for recommended circuit)
RE
CISPR32/EN55032 CLASS B (see Fig. 4 for recommended circuit)
Immunity
ESD
A_S-2WR2
IEC/EN61000-4-2 Contact ±6kV performance Criteria B
B_S-2WR2
IEC/EN61000-4-2 Contact ±8kV performance Criteria B
Typical Performance Curves
3.3VDC output
Others
Fig. 1
DC/DC Converter
A_S-2WR2 & B_S-2WR2 series
2020.04.13-A/9 Page 4 of 6
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120
100
80
60
40
20
0
Output Power Percent(%)
Ambient Temp.( )
℃
Temperature Derating Curve
Safe Operating Area
-40 0 40 85 105 120
Fig. 2
Design Reference
1. Typical application
Input and/or output ripple can be further reduced, by connecting a filter capacitor from the input and/or output terminals to ground as
shown in Fig.3.
Choosing suitable filter capacitor values is very important for a smooth operation of the modules, particularly to avoid start-up problems
caused by capacitor values that are too high. For recommended input and output capacitor values refer to Table 1.
Vin
GND
+Vo
0V
DC
Cin
DC
Cout
Cout
-Vo
Dual Output
Single Output
Vin
GND
+Vo
0V
DC
Cin
DC
Cout
Fig.3
Table 1: Recommended input and output capacitor values
Vin
(VDC)
Cin
(µF)
Single Vo
(VDC)
Cout
(µF)
Dual Vo
(VDC)
Cout
(µF)
5
4.7
3.3/5
10
±3.3/±5
4.7
9/12
2.2
9/12
2.2
±9/±12
1
15
2.2
15/24
1
±15/±24
0.47
24
1
--
--
--
--
DC/DC Converter
A_S-2WR2 & B_S-2WR2 series
2020.04.13-A/9 Page 5 of 6
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Dimensions and Recommended Layout
2. EMC (CLASS B) compliance circuit
Vin
GND
+Vo
-Vo
(0V)
DC/DC LOAD
LDM
C1
Vin
GND
C3
C2
CY
Fig. 4
Input voltage (VDC)
5/9/12/15
24
EMI
C1/C2
4.7µF /50V
CY
--
1nF/2kV
C3
Refer to Cout in Fig.3
LDM
6.8µH
Note: For 24V input models use a Y-capacitor CY of 1nF/2kV.
3. Minimum Output Load Requirement
For a reliable and efficient operation of the converter, the minimum load should never be less than 10% of the rated output load. If the total
required output power is below 10%, a parallel bleeding resistor is required on the output, ensuring that the sum of the power consumption is
always maintained at 10% minimum.
4. For additional information, please refer to DC-DC converter application notes on
www.mornsun-power.com
DC/DC Converter
A_S-2WR2 & B_S-2WR2 series
2020.04.13-A/9 Page 6 of 6
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Notes:
1. Packing information please refer to Product Packing Information which can be downloaded from www.mornsun-power.com. Packing
bag number: 58200001;
2. If the product is not operated within the required load range, the product performance cannot be guaranteed to comply with all
parameters in the datasheet;
3. The maximum capacitive load offered were tested at input voltage range and full load;
4. Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25℃, humidity<75%RH with nominal
input voltage and rated output load;
5. All index testing methods in this datasheet are based on our Company corporate standards;
6. We can provide product customization service, please contact our technicians directly for specific information;
7. Products are related to laws and regulations: see "Features" and "EMC";
8. Our products shall be classified according to ISO14001 and related environmental laws and regulations, and shall be handled by
qualified units.
MORNSUN Guangzhou 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: 86-20-38601850-8801 Fax: 86-20-38601272 E-mail: info@mornsun.cn