TYPICAL CHARACTERISTICS
Filtering
In some circuits which are sensitive to noise
and ripple, a filtering capacitor may be added to
the DC/DC output end and input end to reduce
the noise and ripple. 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
the
external capacitor table.
EXTERNAL CAPACITOR TABLE
Cin
V in
Vout
Cout
(VDC)
(VDC)
(uF)
(uF)
5
4.7
5
4.7
12
24
--
2.2
1
--
9
12
15
2.2
1
0.47
Operating Temp.( C)
o
OUTLINE DIMENSIONS& PIN CONNECTION
First Angle Projection
1
(0.035)
2
4
5
6
1.9
(0.075)
1 2
4
5
6
RECOMMENDED FOOTPRINT
Top view, grid
：
2. 54mm(0.1inch)
dia meter
：
1.00mm(0.039inch)
It’s not recommended to connect any external capacitor
in the application field with less than 0.5 watt output。
To get an extremely low ripple, an
“LC”
filtering
network may be connected to the input and
output ends of the DC/DC converter, which may
produce a more significant filtering effect. 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 (Figure 1).
L
C
L
4.10
Vin
FOOT PRINT DETAILS
Pin
Functions
+Vo
C
DC DC
(Figure 1)
GND
L
0V
-Vo
C
(0.020)
Note:
Unit:mm(inch)
Pin section:0.50*0.3mm(0.020*0.012inch)
Pin tolerances:
+
0.10mm
（
+
0.004inch
）
Generaltolerances:
+
0.25mm(
+
0.010inch)
1
2
4
5
6
Vin
GND
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
overheat protection that is connected to the input
or output end in series (Figure 2).
+Vo
APPLICATION NOTE
Requirement on output load
To ensure this module can operate efficiently and reliably, a minimum load is specified for
this kind of DC/DC converter in addition to a maximum load (namely full load). During
operation, make sure the specified range of input voltage is not exceeded, 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
Vin
GND
REG
+Vout
DC DC
0V
-Vout
REG
Vin
GND
+Vout
0V
DC DC
REG
-Vout
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.
(Figure2)
No parallel connection or plug and play
.
Overload Protection
Under normal operating conditions, the output circuit of these products has no protection
against over-current and short-circuits. The simplest method is to connect a self-recovery
fuse in series at the input end or add a circuit breaker to the circuit.
MORNSUN reserves the copyright
Specifications subject to change without notice.
E_M-1W
A/0-2008
Page 2 of 2
MORNSUN [ MORNSUN SCIENCE& TECHNOLOGY LTD. ]
