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
-Vo
11
No Pin
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
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