Recommended circuit
COMMON SPECIFICATION
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).
Item
Test condition
Min
Typ
15
Max
95
Units
%
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Short circuit protection*
Cooling
-40
-55
85
125
25
°C
L
L
+Vo
Vin
GND
1.5mm from case for 10 seconds
300
1
Cout
Cin
DC
DC
s
0V
(Figure 1)
Free air convection
Plastic (UL94-V0)
Case material
MTBF
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).
3500
K hours
g
Weight
2.1
*Supply voltage must be discontinued at the end of short circuit duration.
TYPICAL CHARECTERISTICS
EXTERNAL CAPACITOR TABLE (Table 1)
Vin
(VDC)
Cin
(uF)
Single Vout
(VDC)
Cout
(uF)
3.3/5
12
4.7
2.2
2.2
1
3.3/5
9
10
4.7
2.2
1
15
12
Operating Temp.(oC)
24
15
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
Output Voltage Regulation and Over-voltage
Protection Circuit
First Angle Projection
The simplest device for output voltage
regulation, over-voltage and over-current
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1*0.1inch),
diameter:1.00mm(0.039inch)
Side View
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
4
6
+Vout
Vin
REG
DC DC
GND
Bottom View
0V
1 2
4
6
REG
+Vout
(0.079)
Vin
FOOTPRINT DETAILS
DC
DC
(Figure 2)
Overload Protection
Pin
1
Function
Vin
GND
0V
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)
2
GND
4
+Vo
6
+
+
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.
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 (namely 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.
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
F_AS-1W
A/0-2008
Page 2 of 2
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