COMMON SPECIFICATION
APPLICATION NOTE
Item
Test Conditions
Min
Typ
15
Max
95
Units
%
Requirement on output load
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Short circuit protection*
Cooling
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
-40
-55
85
125
25
°C
1.5mm from case for 10 seconds
300
1
small, please connect
a resistor with proper
S
resistance at the output end in parallel to increase
the load.
Free air convection
Plastic(UL94-V0)
Case material
MTBF
Recommended circuit
3500
K hours
g
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).
Weight
1.6
*Supply voltage must be discontinued at the end of short circuit duration.
L
L
+Vo
Vin
TYPICAL CHARACTERISTICS
C
C
DC DC
GND
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. It’s not recommended to connect any
external capacitor in the application field .
Operating Temp.(oC)
Output Voltage Regulation and Over-voltage
Protection Circuit
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
The simplest device for output voltage
regulation,
over-voltage
and
over-current
First Angle Projection
protection is
a
linear voltage regulator with
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch),
diameter:1.00mm
overheat protection that is connected to the input
or output end in series (Figure 2).
+Vout
Vin
REG
DC DC
GND
0V
3
4
1
2
REG
+Vout
Vin
DC DC
GND
0V
(Figure 2)
Overload Protection
1
2
3
4
FOOTPRINT DETAILS
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.
Pin
1
Function
Vin
GND
0V
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)
3
4
+Vo
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
B_YS-W2
A/0-2008
Page 2 of 2
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