ISOLATION SPECIFICATIONS
APPLICATION NOTE
Item
Test conditions
Min
Typ
Typ
Max
Units
VDC
MΩ
Requirement on output load
Isolation voltage
Isolation resistance
Tested for 1 minute and 1 mA max
Test at 500VDC
1000
1000
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.
OUTPUT SPECIFICATIONS
Item
Test conditions
Min
Max
0.25
±1.5
±1.2
20
Units
W
Output power
(3.3output)
For Vin change of 1%
Line regulation
Load regulation
(others output)
(3.3 output)
(5V output)
(9V output)
(12V output)
(15V output)
12
10.5
8.3
Overload Protection
%
15
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.
10% to 100% load
10
6.8
10
6.3
10
Output voltage accuracy
See tolerance envelope graph
Temperature drift
Ripple & Noise*
100% full load
20MHz Bandwidth
0.03
75
%/°C
Recommended circuit
50
mVp-p
KHz
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).
Switching frequency Full load, nominal input
100
*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 TA=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2.Dual output models unbalanced load: ±5%.
Dual Output
L
L
+Vo
Vin
Cout
TYPICAL CHARACTERISTICS
0V
Cin
DC DC
Cout
L
L
GND
-Vo
Single Output
L
+Vo
0V
Vin
Cout
Cin
DC DC
GND
(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
arise. It’s not recommended to connect any
external capacitor in the application field .
Operating Temp.(oC)
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
20.00(0.787)
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1*0.1inch)
diameter:1.00(0.039)mm
(Side View)
Output Voltage Regulation and Over-voltage
Protection Circuit
Single Output
The simplest device for output voltage
regulation,
over-voltage
and
over-current
14
1
11
9
8
7
protection is
a
linear voltage regulator with
15.24(0.600)
(Bottom View)
overheat protection that is connected to the input
or output end in series (Figure 2).
1
7
8
14
11
Dual Output
9
Dual Ou tput
+Vout
0V
REG
REG
REG
Vi n
REG
11
14
1
9 8
DC
DC
GND
FOOTPRINT DETAILS
-Vout
7
Single
GND
NC
Pin
1
Dual
GND
NC
Single Output
+Vout
Vi n
REG
7
8
DC
DC
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)
0V
0V
GND
0V
+Vo
No Pin
Vin
+Vo
-Vo
Vin
9
11
14
(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
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