A_D-W25 & B_LD-W25 Series
0.25W, FIXED INPUT, ISOLATED & UNREGULATED
DUAL/SINGLE OUTPUT DC-DC CONVERTER
multi-country patent protection
RoHS
FEATURES
1KVDC Isolation
DIP 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
B0303LD-W25*
B0305LD-W25*
A0505D- W25
A0509D- W25*
A0512D- W25*
A0515D- W25*
B0505LD- W25
B0509 LD- W25*
B0512 LD- W25
B0515 LD- W25
A1205D- W25*
A1209D- W25*
A1212D- W25*
A1215D- W25*
B1203 LD- W25*
B1205 LD- W25
B1209 LD- W25*
B1212 LD- W25
B1215 LD- W25*
A2405D- W25*
A2409D- W25*
A2412D- W25*
A2415D- W25*
B2405 LD- W25
B2409 LD- W25*
B2412 LD- W25*
B2415 LD- W25*
B2424LD- W25*
*Designing
Output
Range
3.0-3.6
Voltage
(VDC)
3.3
5
±5
±9
±12
±15
5
9
12
15
±5
±9
±12
±15
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)
Voltage (VDC)
Nominal
3.3
5
4.5-5.5
APPLICATIONS
The A_D-W25 & B_LD-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) 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.
12
10.8-13.2
3.3
5
9
12
15
±5
±9
±12
±15
24
21.6-26.4
5
9
12
15
24
MODEL SELECTION
B0505 LD -W25
Rated Pow er
Package S ty le
O utpu t Volt age
Input Volta ge
Produ ct Se ries
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
2.1
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_D-W 25 & B_LD-W25
A/1-2008
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
Min
Typ
Max
0.25
±1.5
±1.2
12
10.5
8.3
6.8
6.3
20
15
10
10
10
0.03
50
100
75
%/°C
mVp-p
KHz
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).
D u al O utpu t
L
Vin
Cin
GND
Sin g le O utpu t
L
Vin
Cin
GND
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change of 1% (3.3output)
(others output)
(3.3 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
Test conditions
Units
W
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.
%
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.
See tolerance envelope graph
*
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%.
L
+Vo
Cout
TYPICAL CHARACTERISTICS
DC DC
L Cout
0V
-Vo
L
+Vo
DC DC
(Figure 1)
Cout
0V
It should also be noted that the inductance and
the frequency of the
“LC”
filtering network should
Operating Temp.(
o
C)
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.
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
overheat protection that is connected to the input
or output end in series (Figure 2).
OUTLINE DIMENSIONS & PIN CONNECTIONS
Fi rst A ngle P ro jecti on
20.00(0.787)
7.00
(0.276)
(Side View)
RECOMMENDED FOOTPRINT
Top
view, grid: 2.54*2. 54mm(0. 1*0.1inch)
diameter:1.00 (0. 039)mm
Single Output
14
11
9 8
7
4.10
(0. 161)
15.24(0.600)
1
14
7
1
10. 00
(0.394)
7.62
(0.300)
(Bottom View)
11
9 8
Dual Output
11
Du a l O u tput
Vi n
R EG
REG
+Vout
0V
14
FOOTPRINT DETAILS
Single
Pin
Dual
1
GND
GND
7
NC
NC
8
0V
0V
+Vo
+Vo
9
11
No Pin
-Vo
14
Vin
Vin
1
9 8
GN D
DC DC
REG
7
Sing le Ou tp ut
Vi n
R EG
-Vo ut
REG
+Vout
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)
GN D
DC DC
0V
(Figure 2)
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
A_D-W25 & B_LD-W25
A/1-2008
Page 2 of 2
Embedded System
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