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
1.6
1.5mm from case for 10 seconds
-40
-55
15
Test Conditions
Min
Typ
Max
95
85
125
25
300
1
Free air convection
Plastic(UL94-V0)
K hours
g
S
°C
Units
%
APPLICATION NOTE
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.
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
+Vo
TYPICAL CHARACTERISTICS
Vin
C
GND
DC DC
(Figure 1)
C
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.
It’s
not recommended to connect any
Operating Temp.( C)
o
external capacitor in the application field .
Output Voltage Regulation and Over-voltage
Protection Circuit
The
simplest
device
for
output
voltage
regulation,
over-voltage
and
over-current
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
First Angle Projection
RECOMMENDED FOOTPRINT
Top
view,grid:2.54mm(0.1inch),
diameter:1.00mm
protection is a linear voltage regulator with
overheat protection that is connected to the input
or output end in series (Figure 2).
Vin
GND
REG
+Vout
DC DC
0V
REG
1
2
3
4
Vin
+Vout
DC DC
GND
0V
(Figure 2)
6.00
1
2
3 4
FOOTPRINT DETAILS
Pin
1
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin toler ances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
Function
Vin
GN D
3
4
0V
+Vo
No parallel connection or plug and play.
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.
MORNSUN reserves the copyright
Specifications subject to change without notice.
B_YS-W2
A/0-2008
Page 2 of 2
MORNSUN [ MORNSUN SCIENCE& TECHNOLOGY LTD. ]
