F0305AS-1W Datasheet, PDF (2/2 Pages) MORNSUN Science& Technology Ltd. – SINGLE OUTPUT DC-DC CONVERTER

COMMON SPECIFICATION
Item
Test condition
Min Typ Max Units
Storage humidity
95
%
Operating temperature
-40
85
Storage temperature
Temp. rise at full load
-55
125
°C
15
25
Lead temperature
1.5mm from case for 10 seconds
300
Short circuit protection*
1
s
Cooling
Free air convection
Case material
Plastic (UL94-V0)
MTBF
3500
K hours
Weight
2.1
g
*Supply voltage must be discontinued at the end of short circuit duration.
TYPICAL CHARECTERISTICS
Operating Temp.(^oC)
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
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).
L
Vin
L
+Vo
Cin
GND
DC DC
Cout
0V
(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).
EXTERNAL CAPACITOR TABLE (Table 1)
Vin
Cin Single Vout Cout
(VDC)
(uF)
(VDC)
(uF)
3.3/5
4.7
3.3/5
10
12
2.2
9
4.7
15
2.2
12
2.2
24
1
15
1
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
0.50
(0.020)
First Angle Projection
Side View
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1*0.1inch),
diameter:1.00mm(0.039inch)
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).
12 4 6
Bottom View
12 4 6
Vin
GND
REG
DC DC
+Vout
0V
(0.079)
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)
FOOTPRINT DETAILS
Pin
Func ti on
1
Vin
2
GND
4
6
+Vo
APPLICATION NOTE
Requirement On Output Load
To ensure this module can operate efficiently and reliably, a minimum load is specified for
this kind of DC/DC converter in addition to a maximum load (nam ely full load). During
operation, make sure the specified range of input voltage is not exceeded, 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.
Vin
GND
REG
DC DC
(Figure 2)
+Vout
0V
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.
MORNSUN reserves the copyright
Specifications subject to change without notice.
F_AS-1W
A/0-2008
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