ISOLATION SPECIFICATIONS
Item
Isolation voltage
Isolation resistance
Test conditions
Tested for 1 minute and 1 mA max
Test at 500VDC
Min.
3000
1000
Typ.
Max.
Units
VDC
MΩ
TYPICAL CHARACTERISTICS
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change of
±1%
(3.3V output)
(Others output)
(3.3V output)
(5V output)
Load regulation
10% to 100% load
(9V output)
(12V output)
(15V output)
Output voltage accuracy
Temperature drift
Ripple& Noise*
100% full load
20MHz Bandwidth(EXXXXD-1W)
20MHz Bandwidth(FXXXXD-1W)
50
75
100
12
10
8.3
6.8
6.3
Test conditions
Min
0.1
Typ
Max
1
±1.5
±1.2
20
15
15
15
15
±0.03
75
100
%/°C
mVp-p
KHz
Operating Temp.(
o
C)
Units
W
%
See tolerance envelope graph
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.
Note: Dual output models unbalanced load:
±5%.
APPLICATION NOTE
RECOMMENDED CIRCUIT
Dual O utput
L
+Vo
Cout
Cin
GND
Single O utput
L
Vin
Cin
GND
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.
L
Vin
DC DC
L Cout
0V
-Vo
L
+Vo
DC DC
Cout
0V
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).
Single Ou tp ut
Vin
GND
REG
REG
(Figure 1)
D u a l Output
Vin
GND
REG
REG
+ Vo
0V
-Vo
+ Vo
DC
DC
REG
DC
DC
0V
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
Dual
Cin
Vin
Cout
Cout
Vout
Vout
(VDC)
(uF)
(uF)
(uF)
(VDC)
(VDC)
3.3/5
4.7
3.3/5
10
4.7
±
5
12
15
24
2.2
2.2
1
9
12
15
4.7
2.2
1
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.
±
9
±
12
±
15
2.2
1
0.47
It’s not recommended to connect any external
capacitor in the application field with less than
No parallel connection or plug and play
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-1W & F_D-1W
A/2-2009
Page 2 of 3
MORNSUN [ MORNSUN SCIENCE& TECHNOLOGY LTD. ]
