A_S-W25 & B_LS-W25 Series
0.25W, FIXED INPUT, ISOLATED & UNREGULATED
DUAL/SINGLE OUTPUT DC-DC CONVERTER
multi-country patent protection
RoHS
FEATURES
Small Footprint
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
B0303LS-W25*
B0305LS-W25
A0505S- W25
A0509S- W25*
A0512S- W25
A0515S- W25
B0505LS- W25
B0509 LS- W25*
B0512 LS- W25
B0515 LS- W25
A1205S- W25*
A1209S- W25*
A1212S- W25*
A1215S- W25*
B1203 LS- W25*
B1205 LS- W25
B1209 LS- W25*
B1212 LS- W25
B1215 LS- W25*
A2405S- W25
A2409S- W25*
A2412S- W25*
A2415S- W25*
B2405 LS- W25
B2409 LS- W25*
B2412 LS- W25*
B2415 LS- W25*
B2424LS- W25*
24
21.6-26.4
12
10.8-13.2
5
4.5-5.5
Voltage (VDC)
Nominal
3.3
Nominal
3.0-3.6
Voltage
(VDC)
3.3
5
±5
±9
±12
±15
5
9
12
15
±5
±9
±12
±15
3.3
5
9
12
15
±5
±9
±12
±15
5
9
12
15
24
Output
Current (mA)
Max
75.8
50
±25
±13.8
±10.4
±8.3
50
27.8
20.8
16.7
±25
±13.8
±10.4
±8.3
75.8
50
27.8
20.8
16.7
±25
±13.8
±10.4
±8.3
50
27.8
20.8
16.7
10.4
62
65
62
64
66
65
64
65
67
65
62
63
64
65
62
65
66
67
66
63
64
65
65
63
63
65
65
64
Efficiency
(%, Typ)
APPLICATIONS
The A_S-W25 & B_LS-W25 Series are 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)
2)
3)
Where the voltage of the input power
Where isolation is necessary between input
Where the regulation of the output voltage
supply is fixed (voltage variation
≤ ±10%);
and output (isolation voltage
≤1000VDC);
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
*
Designing.
B0505LS-W25
Rated Power
Package Sty le
Ou tput Volta ge
In put Voltage
Product Se ries
COMMON SPECIFICATIONS
Item
Storage humidity
Operating Temperature
Storage Temperature
Temp. rise at full load
Lead temperature
Short circuit protection*
1.5mm from case for 10 seconds
-40
-55
15
Test conditions
Min
Typ
Max
95
85
125
25
300
1
Free air convection
Plastic (UL94-V0)
3500
2.1
K hours
g
s
°C
Units
%
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
Cooling
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-W25 & B_LS-W25
A/2-2008
Page 1 of 2
ISOLATION SPECIFICATIONS
Item
Isolation voltage
Isolation resistance
Test conditions
Tested for 1 minute and 1 mA max
Test at 500VDC
Min
1000
1000
Typ
Max
Units
VDC
MΩ
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
Min
Typ
Max
0.25
Units
W
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.
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 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).
Dual O utput
L
Vin
Cin
GND
Single Output
L
Vin
Cin
GND
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change
of
±1%
(3.3V input)
(Others input)
(3.3V output)
(5V output)
Load regulation
10% to 100%
load
(9V output)
(12V output)
(15V output)
Output voltage accuracy
Temperature drift
Ripple & Noise*
Switching frequency
100% full load
20MHz Bandwidth
Full load, nominal input
50
100
12
10.5
8.3
6.8
6.3
Test conditions
±1.5
±1.2
20
15
15
15
15
See tolerance envelope graph
0.03
75
%/°C
mVp-p
KHz
*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. See below recommended circuits for more details.
3. Dual output models unbalanced load:
±5%.
L
+Vo
Cout
DC DC
L Cout
0V
-Vo
L
+Vo
TYPICAL CHARACTERISTICS
DC DC
Cout
0V
(Figure 1)
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
Operating Temp.(
o
C)
arise. It’s not recommended to connect any
external capacitor in the application field.
Output Voltage Regulation and Over-voltage
Protection Circuit
The simplest device for output voltage
regulation,
over-voltage
and
over-current
protection is a linear voltage regulator with
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
(0.035)
(0.236)
RECOMMENDED FOOTPRINT
Top
view,grid:2.54*2.54mm(0.1 *0 .1inch),
diameter :1.0 0mm(0 .039inch)
Dual Output
1 2
4 5 6
overheat protection that is connected to the input
or output end in series (Figure 2).
Dual O ut put
2.10
(0.083)
2.54
(0.100)
S ing le Output
(0.374)
Vin
6
REG
REG
+Vout
0V
1 2
4.10
4
GND
Single O utput
DC DC
REG
- Vout
+Vout
FOOTPR INT DE TA ILS
(0.020)
Note:
Unit:mm(inch)
P in section:0.50*0.30mm(0.020*0.012inch)
P in section tolerances: 0.10mm( 0.004inch)
Gener al tolerance s: 0.25mm( 0.0 10inch)
Pin
1
2
4
5
6
Single
Vin
GND
0V
No Pin
+Vo
Dua l
Vin
GND
-Vo
0V
+Vo
Vin
GND
REG
REG
DC DC
0V
(Figure 2)
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
A_S-W25 & B_LS-W25
A/2-2008
Page 2 of 2
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