B0303LS-1W Datasheet, PDF (2/2 Pages) MORNSUN Science& Technology Ltd. – DUAL/SINGLE OUTPUT DC-DC CONVERTER

OUTPUT SPECIFICATIONS
Item
Test conditions
Min Typ Max Units
Output power
Line regulation
For Vin change of 1%
0.1
1
W
±1.2
(3.3 output)
12
20
Load regulation
10% to 100% load
(5V output)
(9V output)
(12V output)
10.5
15
%
8.3
15
6.8
15
(15V output)
6.3
15
Output voltage accuracy
Temperature drift 100% full load
See tolerance envelope graph
0.03 %/°C
(AXXXXS-1W )
50
75
Ripple & Noise
20MHz
(BXXXXLS- 1W )
Bandwidth _(AXX24LS-1W)
75
100
mVp-p
100
150
(BXX24LS-1W )
100
150
Switching frequency Full load, nominal input
100
KHz
Note:
1. All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2. Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
3. Dual output models unbalanced load: ±5%.
TYPICAL CHARACTERISTICS
Operating Temp.(^oC)
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1 *0 .1inch),
d i a me te r :1 .0 0 m m( 0 .0 3 9 i nc h )
2.10
(0.083)
2.54
(0.100)
Dual Output
12 456
Single Output
12 4 6
(0.020)
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)
APPLICATION NOTE
FOOTPRINT DETAILS
Pin Single
1
Vin
2
GND
4
0V
5 No Pin
6
+Vo
Dual
Vin
GND
-Vo
0V
+Vo
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, or use our company’s
products with a lower rated output power (A_S -W2/B_LS-W2 series).
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.
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).
Dual Output
L
L
Vin
+Vo
Cout
Cin
GND
DC DC
L ^Cout
0V
-Vo
Single Output
L
Vin
L
+Vo
Cin
GND
DC DC
Cout
0V
(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. For every channel of output, provided the
safe and reliable operation is ensured, the
recommended capacitance of its filter capacitor
sees (Table 1).
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin Cin Single Cout Dual Cout
(VDC) _(uF) Vout (uF) Vout (uF)
(VDC)
(VDC)
5
4.7
5
10
±5
4.7
12 2.2
9
4.7
±9
2.2
15
2.2
12 2.2 ±12
1
24
1
15
1
±15 0.47
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
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).
Dual O u tput
Vi n
R EG
REG
DC DC
GND
REG
+Vout
0V
-Vo ut
S ingle Output
Vi n
R EG
REG
DC DC
GND
(Figure 2)
+Vout
0V
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
A_S-1W & B_LS-1W A/1-2007
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