OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
Test conditions
For Vin change of 1%
(3.3 output)
(5V output)
(9V output)
(12V output)
(15V output)
Min
0.1
Max
Units
1
W
±1.2
12
20
10.5
15
%
8.3
15
6.8
15
6.3
15
See tolerance envelope graph
0.03
%/°C
50
75
75
100
mVp-p
100
150
100
150
100
KHz
Typ
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
Load regulation
10% to 100% load
Output voltage accuracy
Temperature drift
100% full load
(AXXXXS-1W)
(BXXXXLS-1W)
20MHz
Ripple & Noise
Bandwidth
(AXX24LS-1W)
(BXX24LS-1W)
Switching frequency Full load, nominal input
Vin
Cin
+Vo
Cout
DC DC
GND
Single Output
L
L Cout
0V
-Vo
Note:
1. All specifications measured at T
A
=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%.
L
Vin
Cin
+Vo
Cout
DC DC
(Figure 1)
GND
0V
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
Operating Temp.(
o
C)
sees (Table 1).
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
Dual
Cout
Cin
Single Cout
Vout
(uF)
(uF)
(VDC)
(uF)
Vout
5
12
15
4.7
2.2
2.2
(VDC)
5
9
12
10
4.7
2.2
(VDC)
±
5
4.7
2.2
1
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
(0.035)
(0.236)
RE COMMENDED FOOTPRINT
Top
view,grid:2.54*2.54mm(0.1 *0 .1inch),
diameter:1.00mm(0 .039inch)
Dua l Output
1 2
4 5 6
2.10
(0.083)
2.54
(0.100)
24
1
15
1
0.47
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
±
9
±
12
±
15
Sing le Output
(0.374)
1 2
4.10
4
6
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
FOOTPRINT DETAILS
(0.020)
overheat protection that is connected to the input
or output end in series (Figure 2).
Dual O u tput
Vn
i
GND
S ingle Output
R EG
REG
Note:
Unit:mm(inch)
P in section:0.50*0.30mm(0.020*0.012inch)
P in section tolerances: 0.10mm( 0.004inch)
General tolerance s: 0.2 5mm( 0.0 10inch)
P in
1
2
4
5
6
S ing le
Vin
GND
0V
No Pin
+Vo
Dua l
Vin
GND
-Vo
0V
+Vo
+Vout
0V
DC DC
REG
-Vout
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
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).
Vn
i
GND
R EG
REG
+Vout
DC DC
0V
(Figure 2)
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
Page 2 of 2
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