OUTPUT SPECIFICATIONS
APPLICATION NOTE
Item
Test conditions
Min
0.1
Typ
Max
1
Units
W
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.
Output power
(3.3V output)
(others output)
(3.3V output)
(5V output)
±1.5
±1.2
20
For Vin change
of ±1%
Line regulation
15
10
15
%
(9V output)
8.3
6.8
6.3
6.0
15
10% to 100%
load
Load regulation
(12V output)
(15V output)
(24V output)
15
15
Recommended circuit
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).
Output voltage accuracy
Temperature drift
See tolerance envelope graph
0.03 %/°C
100% full load
Ripple& Noise*
20MHz Bandwidth
100
100
150 mVp-p
KHz
L
Switching frequency
Full load, nominal input
L
+Vo
Vin
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing
of Power Converter section, application notes.
Note:
1. All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated
output load unless otherwise specified.
Cout
Cin
DC
DC
GND
0V
(Figure 1)
2. See below recommended circuits for more details.
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
TYPICAL CHARACTERISTICS
sees (Table 1).
EXTERNAL CAPACITOR TABLE (Table 1)
Single Vout
(VC)
Vin
(VDC)
Cin
(uF)
Cout
(uF)
Operating Temp.(oC)
3.3/5
12
24
-
4.7
2.2
1
3.3/5
9
10
4.7
2.2
1
OUTLINE DIMENSIONS & PIN CONNECTIONS
12
First Angle Projection
-
15/24
FXXXXM-1W
FXXXXN-1W
It’s not recommended to connect any external
capacitor in the application field with less than 0.5 watt
output.
Side view
Output Voltage Regulation and Over-voltage
Protection Circuit
0.50
(0.020)
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
1
4
5
Bottom view
10.00(0.394)
1
3 4
2
6.00(0.236)
7
(Figure 2).
+Vout
Vin
REG
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch),
diameter:1.00mm(0.039inch)
DC DC
GND
0V
+Vout
REG
Vin
DC
(Figure 2)
Overload Protection
DC
GND
1
2
4
3
7
5
0V
1
4
FOOTPRINT DETAILS
Function
Pin
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.
GND
Vin
2
Function
Pin
3
0V
GND
Vin
+Vo
1
4
5
7
4
+Vo
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin section tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
0V
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
F_M-1W & F_N-1W
A/1-2008
Page 2 of 2
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