ISOLATION SPECIFICATIONS
Item
Isolation voltage
Test conditions
Tested for 1 minute and 1 mA max
Min
1000
1000
Typ
Max
Units
VDC
MΩ
Isolation resistance Test at 500VDC
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 testing and application 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).
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change of 1%
(5V output)
(9V output)
Load regulation
10% to 100% load
(12V output)
(15V output)
(24V output)
Output voltage accuracy
Temperature drift
Ripple & Noise*
100% full load
20MHz Bandwidth
75
75
12.8
8.3
6.8
6.3
5
Test conditions
Min
0.2
Typ
Max
2
±1.2
15
15
15
15
15
0.03
150
%/°C
mVp-p
KHz
%
Units
W
Dual Output
L
L
Vin
Cin
+Vo
Cout
DC DC
GND
Single Output
L
L Cout
0V
-Vo
See tolerance envelope graph
L
Vin
Cin
+Vo
Cout
DC DC
(Figure 1)
Switching frequency Full load, nominal input
GND
0V
*
Test ripple and noise by
“parallel
cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Note:
1. All specifications measured at T
A
=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2. Dual output models unbalanced load:
±5%.
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
greatest capacitance of its filter capacitor sees
(Table 1).
EXTERNAL CAPACITOR TABLE (TABLE 1)
TYPICAL CHARACTERISTICS
Ambient Temperature
( C )
Vin
(VDC)
5
12
15
24
Cin
(uF)
4.7
2.2
2.2
1
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
RECOMMENDED FOOTPRINT
Top
view,grid:2.54*2.54mm(0.1*0.1inch)
diameter:1.00mm(0.039inch)
Dual Output
Single
Vout
(VDC)
5
9
12
15
Cout
(uF)
10
4.7
2.2
1
Dual
Vout
(VDC)
±5
±9
±12
±15
Cout
(uF)
4.7
2.2
1
0.47
(0.035)
(0.276)
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
(0.079)
(0.100)
1 2
4 5 6
Single Output
(0.374)
Output Voltage Regulation and Over-voltage
Protection Circuit
The simplest device for output voltage
6
4.10
1 2
4
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).
Duals
Vin
GND
-V0
0V
+Vo
(0.020)
FOOTPRINT DETAILS
Pin
1
2
4
5
6
Singles
Vin
GND
0V
No Pin
+Vo
Dual O u tput
Vn
i
GND
S ingle Output
Vn
i
GND
R EG
REG
R EG
REG
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
+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-1W /B_LS-1W Series).
MORNSUN reserves the copyright
Specifications subject to change without notice.
+Vout
DC DC
0V
(Figure 2)
No parallel connection or plug and play.
A_S-2W & B_S-2W
A/1-2008
Page 2 of 2
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