A_S-2W & B_S-2W Series
2W, FIXED INPUT, ISOLATED & UNREGULATED
DUAL/SINGLE OUTPUT DC-DC CONVERTER
RoHS
FEATURES
High Efficiency up to 86%
1KVDC Isolation
SIP Package
Internal SMD Construction
Temperature Range: -40°C to +85°C
No Heat sink Required
No External Component Required
Industry Standard Pinout
RoHS Compliance
PRODUCT PROGRAM
Input
Part
Number
B0303S-2W
A0505S-2W
A0509S-2W
A0512S-2W
A0515S-2W
A0524S-2W
B0503S-2W
B0505S-2W
B0509S-2W
Series are
B0512S-2W
B0515S-2W
A1205S-2W
A1209S-2W
A1212S-2W
A1215S-2W
B1205S-2W
B1209S-2W
B1212S-2W
B1215S-2W
A1505S-2W
B1505S-2W
A2405S-2W
A2409S-2W
A2412S-2W
A2415S-2W
A2424S-2W
B2405S-2W
B2409S-2W
B2412S-2W
24
21.6-26.4
15
13.5-16.5
12
10.8-13.2
5
4.5-5.5
Voltage (VDC)
Nominal
3.3
Range
2.97-3.63
Voltage
(VDC)
3.3
±5
±9
±12
±15
±24
3.3
5
9
12
15
±5
±9
±12
±15
5
9
12
15
±5
±5
±5
±9
±12
±15
±24
5
9
12
15
24
Output
Current (mA)
Max
400
±200
±111
±83
±67
±42
400
400
222
167
133
±200
±111
±83
±67
400
222
167
133
±200
400
±200
±111
±83
±67
±42
400
222
167
133
84
Min
40
±20
±12
±9
±7
±5
40
40
23
17
14
±20
±12
±9
±7
40
23
17
14
±20
40
±20
±12
±9
±7
±5
40
23
17
14
10
73
82
85
86
82
82
74
81
84
83
84
81
84
86
82
81
82
85
82
80
80
80
84
84
84
85
80
83
84
84
84
UL CE
UL CE
UL CE
UL CE
UL
UL
UL
UL
UL CE
UL CE
UL CE
UL CE
UL
UL
UL
UL
UL CE
UL CE
UL CE
UL CE
UL
UL
UL
UL
Efficiency
(%, Typ)
UL CE
APPLICATIONS
The A_S-2W & B_S-2W
specially designed for applications where a
group of polar 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 fixed (voltage variation
≤
±10%);
2) Where isolation is necessary between
input
and
output
(isolation
voltage
≤1000VDC);
3) Where the regulation of the output
voltage and the output ripple noise are
not demanding.
Such as: purely digital circuits, ordinary low
frequency analog circuits, and IGBT power
device driving circuits.
MODEL SELECTION
B2415S-2W
B2424S-2W
A0505S-2W
Rated Power
Package Styl e
Ou tp ut Vol tage
Inp ut Volta ge
Pro duc t Se ries
Note: The A_S-1W/B_LS-1W series also are available in our company.
COMMON SPECIFICATIONS
Item
Operating Temp. Range
Storage Temp. Range
Storage humidity range
Cooling
Test conditions
Min
-40
-55
Typ
Max
85
125
95
Free air convection
15
1.5mm from case for 10 seconds
25
300
1
Plastic (UL94-V0)
3500
2.8
K hours
g
°C
s
Units
°C
%
MORNSUN Science& Technology co.,Ltd.
Address:
2th floor 6th building, Hangzhou
Industrial District, Guangzhou, China
Tel: 86-20-38601850
Fax: 86-20-38601272
http://www.mornsun-power.com
Temp. rise at full load
Lead temperature
Short circuit protection*
Case material
MTBF
Weight
*
Supply voltage must be discontinued at the end of short circuit duration.
MORNSUN reserves the copyright
Specifications subject to change without notice.
A_S-2W & B_S-2W
A/1-2008
Page 1 of 2
ISOLATION SPECIFICATIONS
Item
Isolation voltage
Test conditions
Tested for 1 minute and 1 mA max
Min
1000
1000
Typ
Max
Units
VDC
MΩ
Isolation resistance Test at 500VDC
Overload Protection
Under normal operating conditions, the output
circuit of these products has no protection
against overload. The simplest method is to
connect a self-recovery fuse in series at the
input end or add a circuit breaker to the circuit.
Recommended testing and application circuit
If you want to further decrease the input/output
ripple,
an
“LC”
filtering
network
may
be
connected to the input and output ends of the
DC/DC converter, see (Figure 1).
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change of 1%
(5V output)
(9V output)
Load regulation
10% to 100% load
(12V output)
(15V output)
(24V output)
Output voltage accuracy
Temperature drift
Ripple & Noise*
100% full load
20MHz Bandwidth
75
75
12.8
8.3
6.8
6.3
5
Test conditions
Min
0.2
Typ
Max
2
±1.2
15
15
15
15
15
0.03
150
%/°C
mVp-p
KHz
%
Units
W
Dual Output
L
L
Vin
Cin
+Vo
Cout
DC DC
GND
Single Output
L
L Cout
0V
-Vo
See tolerance envelope graph
L
Vin
Cin
+Vo
Cout
DC DC
(Figure 1)
Switching frequency Full load, nominal input
GND
0V
*
Test ripple and noise by
“parallel
cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Note:
1. All specifications measured at T
A
=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2. Dual output models unbalanced load:
±5%.
It should also be noted that the inductance and
the frequency of the
“LC”
filtering network should
be staggered with the DC/DC frequency to avoid
mutual interference. 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).
EXTERNAL CAPACITOR TABLE (TABLE 1)
TYPICAL CHARACTERISTICS
Ambient Temperature
( C )
Vin
(VDC)
5
12
15
24
Cin
(uF)
4.7
2.2
2.2
1
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
RECOMMENDED FOOTPRINT
Top
view,grid:2.54*2.54mm(0.1*0.1inch)
diameter:1.00mm(0.039inch)
Dual Output
Single
Vout
(VDC)
5
9
12
15
Cout
(uF)
10
4.7
2.2
1
Dual
Vout
(VDC)
±5
±9
±12
±15
Cout
(uF)
4.7
2.2
1
0.47
(0.035)
(0.276)
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
(0.079)
(0.100)
1 2
4 5 6
Single Output
(0.374)
Output Voltage Regulation and Over-voltage
Protection Circuit
The simplest device for output voltage
6
4.10
1 2
4
regulation,
over-voltage
and
over-current
protection is a linear voltage regulator with
overheat protection that is connected to the input
or output end in series (Figure 2).
Duals
Vin
GND
-V0
0V
+Vo
(0.020)
FOOTPRINT DETAILS
Pin
1
2
4
5
6
Singles
Vin
GND
0V
No Pin
+Vo
Dual O u tput
Vn
i
GND
S ingle Output
Vn
i
GND
R EG
REG
R EG
REG
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
+Vout
0V
DC DC
REG
-Vout
APPLICATION NOTE
Requirement on output load
To ensure this module can operate efficiently and reliably, During operation, the minimum
output load is
not less than 10%
of the full load, and that
this product should never be
operated under no load!
If the actual output power is very small, please connect a resistor
with proper resistance at the output end in parallel to increase the load, or use our company’s
products with a lower rated output power (A_S-1W /B_LS-1W Series).
MORNSUN reserves the copyright
Specifications subject to change without notice.
+Vout
DC DC
0V
(Figure 2)
No parallel connection or plug and play.
A_S-2W & B_S-2W
A/1-2008
Page 2 of 2
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