OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
Load regulation
Output voltage accuracy
Temperature drift
Ripple & Noise*
Switching frequency
100% full load
20MHz Bandwidth
Full load, nominal input
75
130
For Vin change of 1%
10% to 100% load (3.3V output)
10% to 100% load(5V output)
15
12.8
Test Conditions
Min.
0.1
Typ.
Max.
1
±1.5
20
15
±0.03
100
%
Units
W
TYPICAL CHARACTERISTICS
See tolerance envelope graph
%/℃
mVp-p
KHz
*Test ripple and noise by
“parallel
cable” method. See detailed operation instructions at Testing of
Power Converter section, application notes.
Operating Temp.(
o
C)
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.
RECOMMENDED CIRCUIT
L
L
+Vo1
C
Vin
C
DC DC
L
C
0V1
+Vo2
0V2
GND
(Figure 1)
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).
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 sees (Table 1).
+Vo1
Vin
GND
REG
0V1
DC
DC
REG
+Vo2
0V2
+Vo1
0V1
Vin
DC
GND
DC
REG
+Vo2
0V2
(Figure 2)
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).
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin(VDC)
Cin(uF)
Cout(uF)
Vout(VDC)
3.3/5
4.7
3.3/5
4.7
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.
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
No parallel connection or plug and play
The copyright and authority for the interpretation of the products are reserved by Mornsun
Specifications subject to change without notice.
D_M-1W
A/0-2009
Page 2 of 2
MORNSUN [ MORNSUN SCIENCE& TECHNOLOGY LTD. ]
