OUTPUT SPECIFICATIONS
Overload Protection
Item
Test conditions
Min
0.1
Typ
Max
1
Units
W
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.
Output power
(3.3 input)
±1.5
±1.2
20
For Vin change
of ±1%
Line regulation
Load regulation
(others input)
(3.3 output)
(5V output)
12
10
15
%
Recommended circuit
10% to 100% load (9V output)
(12V output)
8.3
6.8
6.3
15
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).
15
(15V output)
15
Output voltage accuracy
See tolerance envelope graph
Temperature drift
100% full load
0.03
75
%/°C
mVp-p
KHz
Dual Output
L
L
+Vo
(EXXXXS-1W）
(EXX24S-1W）
(FXXXXS-1W）
(FXX24S-1W）
50
100
75
Vin
Cout
0V
Cin
DC
DC
DC
150
100
150
Cout
L
L
Ripple& Noise*
20MHz Bandwidth
GND
-Vo
Single Output
Vin
100
L
+Vo
0V
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.
100
Cout
Cin
DC
GND
Note:
(Figure 1)
1.All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
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
2.Dual output models unbalanced load: ±5%.
TYPICAL CHARACTERISTICS
sees (Table 1).
EXTERNAL CAPACITOR TABLE (TABLE 1)
Single
Vout
(VDC)
Dual
Vout
(VDC)
Operating Temp.(oC)
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
Cin
(uF)
Vin
(VDC)
Cout
(uF)
Cout
(uF)
3.3/5
12
4.7
2.2
2.2
1
3.3/5
9
10
4.7
2.2
1
4.7
2.2
1
±5
±9
15
12
±12
±15
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch),
diameter:1.00mm
24
15
0.47
Side view
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
Dual Output
2
1
5
6
Output Voltage Regulation and Over-voltage
Protection Circuit
The simplest device for output voltage
Single Output
regulation,
over-voltage
and
over-current
1
2
protection is
a
linear voltage regulator with
5
Bottom view
overheat protection that is connected to the input
or output end in series (Figure 2).
Dual Output
FOOTPRINT DETAILS
Single
Dual
Vin
Pin
+Vout
REG
Vin
REG
Vin
GND
0V
1
2
5
6
7
0V
DC
DC
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
GND
-V0
GND
-Vout
REG
REG
No pin
0V
Single Output
+Vo
+Vo
+Vout
Vin
REG
DC
DC
APPLICATION NOTE
GND
0V
Requirement on output load
(Figure2)
No parallel connection or plug and play.
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_S-W25&F_S-W25).
MORNSUN reserves the copyright
Specifications subject to change without notice.
E_S-1W & F_S-1W A/1-2007
Page 2 of 2
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