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B1203S/D-W2 Datasheet(PDF) 2 Page - MORNSUN Science& Technology Ltd.

Part # B1203S/D-W2
Description  SINGLE OUTPUT DC-DC CONVERTER
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Manufacturer  MORNSUN [MORNSUN Science& Technology Ltd.]
Direct Link  http://www.mornsun-power.com
Logo MORNSUN - MORNSUN Science& Technology Ltd.

B1203S/D-W2 Datasheet(HTML) 2 Page - MORNSUN Science& Technology Ltd.

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The copyright and authority for the interpretation of the products are reserved by Mornsun
Specifications subject to change without notice.
B_S(D)-W2
A/4-2009
Page 2 of 3
OUTPUT SPECIFICATIONS
APPLICATION NOTE
Item
Test conditions
Min.
Typ.
Max.
Units
Output power
0.25
W
For Vin change of 1%(3.3V output)
±1.5
Line regulation
For Vin change of 1%(others output)
±1.2
10% to 100% load(3.3 output)
15
20
10% to 100% load (5V output)
12.8
15
10% to 100% load (9V output)
8.3
15
10% to 100% load (12V output)
6.8
15
Load regulation
10% to 100% load (15V output)
6.3
15
%
Output voltage accuracy
See tolerance envelope graph
Temperature drift
100% full load
0.03
%/
°C
Ripple & Noise*
20MHz Bandwidth
50
75
mVp-p
Switching frequency Full load, nominal input
110
KHz
*Test ripple and noise by
“parallel cable” method. See detailed operation instructions at Testing of
Power Converter section, application notes.
Operating Temp.( C)
o
TYPICAL CHARACTERISTICS
RECOMMENDED CIRCUIT
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 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.
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).
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.
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).
Overload Protection
Under normal operat ing 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.
No parallel connection or plug and play
L
Vin
GND
+Vo
0V
DC
Cin
L
DC
Cout
(Figure 1)
Vin
GND
Vin
GND
REG
+Vo
0V
+Vo
DC DC
DC
DC
REG
0V
(Figure 2)


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