ISOLATION SPECIFICATIONS
TYPICAL CHARACTERISTICS
Item
Test conditions
Min.
Typ.
Typ.
Max.
Units
VDC
MΩ
Isolation voltage
Tested for 1 minute and 1 mA max 3000
Isolation resistance Test at 500VDC
1000
OUTPUT SPECIFICATIONS
Item
Test conditions
Min.
0.2
Max.
2
Units
W
Output power
(3.3V output)
(Others output)
(3.3V output)
(5V output)
±1.5
±1.2
20
For Vin change of
±1%
Line regulation
Load regulation
12
10
%
15
10% to 100% load
(9V output)
8.3
6.8
6.3
10
(12V output)
(15V output)
10
10
Output voltage accuracy
See tolerance envelope graph
Temperature drift
Ripple& Noise*
100% full load
20MHz Bandwidth
±0.03 %/°C
75
70
150
mVp-p
Switching frequency Full load, nominal input
KHz
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Note: Dual output models unbalanced load: ±5%.
Operating Temp.(oC)
APPLICATION NOTE
RECOMMENDED CIRCUIT
Dual Output
L
L
+Vo
0V
Requirement on output load
Vin
Cout
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 (E_D-1W/F_D-1W Series).
Cin
DC DC
Cout
L
L
GND
-Vo
Single Output
L
+Vo
0V
Vin
Cout
Cin
DC DC
GND
Recommended circuit
(Figure 1)
If you want to further decrease the input/output ripple, an “LC” filtering network may be
Dual Output
connected to the input and output ends of the DC/DC converter, see (Figure 1).
+Vo
REG
Vin
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).
REG
0V
DC DC
GND
-Vo
REG
REG
Single Output
+Vo
0V
Vin
REG
DC DC
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).
(Figure 2)
EXTERNAL CAPACITOR TABLE (TABLE 1)
Single
Vout
(VDC)
Dual
Vout
(VDC)
Cin
(uF)
Vin
(VDC)
Cout
(uF)
Cout
(uF)
Overload Protection
5
12
24
-
4.7
2.2
1
3.3/5
9
10
4.7
2.2
1
±5
±9
4.7
2.2
1
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.
12
±12
±15
-
15
1
No parallel connection or plug and play
It’s not recommended to connect any external
capacitor in the application field with less than
0.5 watt output.
The copyright and authority for the interpretation of the products are reserved by Mornsun
Specifications subject to change without notice.
E_D-2W & F_D-2W
A/2-2009
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