Overload Protection
OUTPUT SPECIFICATIONS
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.
Item
Test conditions
Min
0.1
Typ
Max
1
Units
W
Output power
Line regulation
For Vin change of 1%
±1.2
20
(3.3 output)
(5V output)
(9V output)
(12V output)
(15V output)
12
10.5
8.3
6.8
6.3
15
%
Load regulation
15
10% to 100% load
Recommended circuit
15
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).
15
Output voltage accuracy
See tolerance envelope graph
Temperature drift
100% full load
0.03
75
%/°C
(AXXXXS-1W)
(BXXXXLS-1W)
(AXX24LS-1W)
(BXX24LS-1W)
50
75
Dual Output
L
100
150
150
20MHz
Bandwidth
L
Ripple & Noise
mVp-p
KHz
+Vo
Vin
100
100
100
Cout
0V
Cin
DC
DC
DC
DC
Cout
L
L
GND
-Vo
Switching frequency Full load, nominal input
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.
Single Output
Vin
L
+Vo
0V
Cout
Cin
GND
3. Dual output models unbalanced load: ±5%.
(Figure 1)
TYPICAL CHARACTERISTICS
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).
Operating Temp.(oC)
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
(VDC)
Single Cout
Dual
Vout
(VDC)
Cout
(uF)
Cin
(uF)
Vout
(uF)
(VDC)
5
4.7
2.2
2.2
1
5
9
10
4.7
2.2
1
4.7
2.2
1
±5
±9
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1*0.1inch),
diameter:1.00mm(0.039inch)
12
15
24
12
15
±12
±15
Dual Output
0.47
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
2.54
(0.100)
2.10
(0.083)
2
1
4
5
6
6
Output Voltage Regulation and Over-voltage
Protection Circuit
Single Output
The simplest device for output voltage
1
2
4
regulation,
over-voltage
and
over-current
protection is
a
linear voltage regulator with
FOOTPRINT DETAILS
overheat protection that is connected to the input
(0.020)
Single
Vin
Dual
Vin
Pin
1
or output end in series (Figure 2).
Dual Ou tput
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
+Vout
0V
REG
REG
REG
Vin
REG
4
DC DC
5
6
No Pin
+Vo
0V
GND
-Vout
+Vo
Single Output
APPLICATION NOTE
+Vout
0V
Vin
REG
DC
DC
(Figure 2)
No parallel connection or plug and play.
Requirement on output load
GND
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).
MORNSUN reserves the copyright
Specifications subject to change without notice.
A_S-1W & B_LS-1W A/1-2007
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