COMMON SPECIFICATION
Item
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Short circuit protection*
Cooling
Case material
MTBF
Weight
*
Supply voltage must be discontinued at the end of short circuit duration.
3500
2.1
1.5mm from case for 10 seconds
-40
-55
15
Test condition
Min
Typ
Max
95
85
125
25
300
1
Free air convection
Plastic (UL94-V0)
K hours
g
s
°C
Units
%
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
L
Vin
Cin
+Vo
DC DC
(Figure 1)
Cout
GND
0V
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)
TYPICAL CHARECTERISTICS
Vin
(VDC)
3.3/5
12
Operating Temp.(
o
C)
Cin
(uF)
4.7
2.2
2.2
1
Single Vout
(VDC)
3.3/5
9
12
15
Cout
(uF)
10
4.7
2.2
1
15
24
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
First Angle Projection
9.50
(0.374)
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
(0.161)
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).
0.50
(0.020)
1 2
(0.035)
(0.236)
4
6
Vin
GND
REG
+Vout
DC DC
0V
REG
1 2
4
6
Bottom View
(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
Function
Vin
1
2
GND
4
+Vo
6
Vin
GND
+Vout
DC DC
0V
(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.
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.
MORNSUN reserves the copyright
Specifications subject to change without notice.
F_AS-1W
A/0-2008
Page 2 of 2
MORNSUN [ MORNSUN SCIENCE& TECHNOLOGY LTD. ]
