E-XD-2W Datasheet, PDF (2/3 Pages) Microdc power Technology Co., Ltd – 2W,FIXED INPUT,ISOLATED&UNREGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER

ISOLATION SPECIFICATIONS
Item
Isolation voltage
Isolation resistance
Test conditions
Tested for 1 minute and 1 mA max
Test at 500VDC
E-XD-2W&F-XD-2W Series
TYPICAL CHARACTERISTICS
Min.
Typ.
Max.
Units
3000
VDC
1000
MΩ
OUTPUT SPECIFICATIONS
Item
Test conditions
Min. Typ. Max. Units
Output power
0.2
2
W
Line regulat ion
For Vin change of
±1%
(3.3V output)
(Others output)
(3.3V output)
±1.5
%
±1.2
%
12
20
%
(5V output)
10
15
%
Load regulation
10% to 100% load _{(9V output)}
8.3
10
%
(12V output)
6.8
10
%
(15V output)
6.3
10
%
Output voltage accuracy
See tolerance envelope graph
Temperature drift
100% full load
±0.03 %/°C
Ripple& Noise*
20MHz Bandwidth
75
150
mVp-p
Switching frequency
Full load, nominal input
70
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%.
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
(E_XD-1W/F_XD-1W Series).
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).
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).
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.
No parallel connection or plug and play
RECOMMENDED CIRCUIT
Dual Output
Dual Output
(Figure 1)
(Figure 2)
Vin
(VDC)
EXTERNAL CAPACITOR TABLE (TABLE 1)
Cin
Single
Vout
Cout
Dual
Vout
Cout
(uF)
(VDC)
(uF)
(VDC)
(uF)
5
4.7
3.3/5
10
±5
4.7
12
2.2
9
4.7
±9
2.2
24
1
12
2.2
±12
1
-
-
15
1
±15
1
It’s not recommended to connect any external
capacitor in the application field with less than
0.5 watt output.
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