Recommended testing and application circuit
OUTPUT SPECIFICATIONS
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).
Item
Test conditions
Min
0.1
Typ
Max
1
Units
W
Output power
Line regulation
For Vin change of ±1%
±1.2
15
%
(5V output)
10
Single Output
L
L
+Vo
(9V output)
(12V output)
(15V output)
8.3
6.8
6.3
15
Vin
Load regulation
10% to 100% load
%
Cout
15
Cin
DC
DC
GND
15
0V
Output voltage accuracy
See tolerance envelope graph
(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
(Table 1).
Temperature drift
Ripple & Noise*
100% full load
20MHz Bandwidth
0.03
200
%/°C
mVp-p
KHz
150
50
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.
TYPICAL CHARACTERISTICS
EXTERNAL CAPACITOR TABLE (Table 1)
Vin
(VDC)
Single Cout
Dual
Vout
(VDC)
Cou
(uF)
Cin
(uF)
Vout
(uF)
(VDC)
5
12
24
-
4.7
2.2
1
5
9
10
4.7
2.2
1
4.7
2.2
1
±5
±9
12
15
±12
±15
-
1
It’s not recommend to connect any external
capacitor in the application field with less than 0.5
watt output.
(
)
C
Ambient Temperature
Output Voltage Regulation and Over-voltage
Protection Circuit
The simplest device for output voltage
OUTLINE DIMENSIONS & PIN CONNECTIONS
regulation,
over-voltage
and
over-current
First Angle Projection
protection is a
linear voltage regulator with
overheat protection that is connected to the input
or output end in series (Figure 2).
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch),
diameter:1.00mm
Single Output
( 0.937 )
23.80
+Vout
0V
REG
Vin
REG
DC DC
(Figure 2)
GND
Single Output
8
1
16
1
10 9
Bottom view
16
10 9
7
8
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.
3.01
( 0.119 )
( 0.600 )
15.24
FOOTPRINT DETAILS
PIN
Function
GND
NC
NC
7
8
2.54
( 0.100 )
+Vo
0V
10
Vin
16
Note:
Unit: mm(inch)
Pin diameter:0.50mm(0.020inch)
NC: no connection
+
+
Pin tolernces: 0.05mm( 0.002inch)
General tolerances: 0.25mm ( 0.010inch)
+
+
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.
MORNSUN reserves the copyright
Specifications subject to change without notice.
FB_N-1W A/0-2007
Page 2 of 2
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