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
0.2
Typ
Max
2
Units
W
Output power
Line regulation
For Vin change of 1%
±1.2
15
%
(5V output)
(9V output)
(12V output)
(15V output)
12.8
8.3
6.8
6.3
15
Load regulation
10% to 100% load
%
15
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).
15
Output voltage accuracy
See tolerance envelope graph
Temperature drift
Ripple & Noise*
100% full load
20MHz Bandwidth
0.03
150
%/°C
100
75
mVp-p
KHz
Switching frequency Full load, nominal input
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Dual Output
L
L
+Vo
Vin
Note:
Cout
0V
Cin
DC
1. All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2. Dual output models unbalanced load: ±0.5%.
DC
Cout
L
L
GND
-Vo
Single Output
Vin
L
+Vo
0V
TYPICAL CHARACTERISTICS
Cout
Cin
DC
DC
GND
(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
greatest capacitance of its filter capacitor sees
(
)
C
Ambient Temperature
OUTLINE DIMENSIONS & PIN CONNECTIONS
(Table 1).
First Angle Projection
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
(VDC) (uF)
Cin Single Cout Dual Cout
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch),
diameter:1.00mm(0.039inch)
Vout (uF)
(VDC)
Vout
(VDC)
(uF)
5
12
15
24
-
4.7
2.2
2.2
1
3.3
5
10
10
4.7
2.2
1
±5
±9
4.7
2.2
1
Single Output
9
±12
±15
±24
8
7
14
1
9
12
15
0.47
-
0.47
7
8
1
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
14
11
9
Dual Output
Output Voltage Regulation and Over-voltage
Protection Circuit
11
14
9
8
7
FOOTPRINT DETAILS
The simplest device for output voltage
Singles
Duals
Pin
1
1
regulation,
over-voltage
and
over-current
GND
NC
GND
NC
protection is
a
linear voltage regulator with
7
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin tolerances: 0.10mm( 0.004inch)
8
0V
0V
+Vo
-Vo
overheat protection that is connected to the input
9
+Vo
No pin
Vin
or output end in series (Figure 2).
Dual Ou tput
11
14
General tolerances: 0.25mm( 0.010inch)
Vin
+Vout
0V
REG
REG
REG
Vin
REG
DC DC
GND
-Vout
APPLICATION NOTE
Single Output
Requirement on output load
+Vout
0V
Vin
REG
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_D -1W/B_D-1Wseries).
DC
DC
(Figure 2)
No parallel connection or plug and play.
GND
MORNSUN reserves the copyright
Specifications subject to change without notice.
A_D-2W & B_D-2W A/1-2007
Page 2 of 2
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