ISOLATION SPECIFICATIONS
APPLICATION NOTE
Item
Test conditions
Min
Typ
Typ
Max
Units
VDC
MΩ
Requirement on output load
Isolation voltage
Tested for 1 minute and 1 mA max
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.
Isolation resistance Test at 500VDC
OUTPUT SPECIFICATIONS
Item
Test conditions
Min
Max
0.25
±1.5
±1.2
20
Units
W
Output power
(3.3V input)
(Others input)
(3.3V output)
(5V output)
(9V output)
(12V output)
(15V output)
For Vin change
of ±1%
Line regulation
Load regulation
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.
12
10.5
8.3
6.8
6.3
%
15
10% to 100%
load
15
15
15
Recommended circuit
Output voltage accuracy
Temperature drift
See tolerance envelope graph
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).
100% full load
0.03 %/°C
Ripple & Noise*
20MHz Bandwidth
50
75
mVp-p
KHz
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.
Dual Output
L
L
+Vo
Note:
Vin
Cout
1. All specifications measured at TA=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%.
0V
Cin
DC DC
Cout
L
L
GND
-Vo
Single Output
L
+Vo
0V
Vin
TYPICAL CHARACTERISTICS
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
Output Voltage Regulation and Over-voltage
Protection Circuit
First Angle Projection
The simplest device for output voltage
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1*0.1inch),
diameter:1.00mm(0.039inch)
regulation,
over-voltage
and
over-current
protection is
a
linear voltage regulator with
Dual Output
overheat protection that is connected to the input
or output end in series (Figure 2).
2.54
2.10
(0.100)
(0.083)
2
1
4
5
6
6
Dual Output
Single Output
+Vout
REG
REG
REG
Vin
REG
0V
DC
DC
DC
1
2
4
GND
-Vout
Single Output
FOOTPRINT DETAILS
+Vout
0V
Vin
REG
(0.020)
Single
Vin
Dual
Vin
Pin
1
DC
GND
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin section tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
2
GND
0V
GND
-Vo
4
(Figure 2)
5
6
No Pin
+Vo
0V
+Vo
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
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