APPLICATION NOTE
COMMON SPECIFICATION
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
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 small,
please connect a resistor with proper resistance at
the output end in parallel to increase the load.
-40
-55
85
125
25
°C
1.5mm from case for 10 seconds
260
Free air convection
Plastic(UL94-V0)
1
Case material
Short circuit protection*
MTBF
Recommended circuit
s
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).
3500
K hours
g
Weight
1.70
*Supply voltage must be discontinued at the end of short circuit duration.
L
L
+Vo
Vin
C
TYPICAL CHARACTERISTICS
0V
C
DC
DC
L
C
GND
-Vo
(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)
RECOMMENDED REFLOW SOLDERING PROFILE
260oC
Output Voltage Regulation and Over-voltage
Protection Circuit
250
200
150
100
10 Sec Max
220o C
The simplest device for output voltage
regulation,
over-voltage
and
over-current
protection is
a
linear voltage regulator with
90 Sec Max
(>220oC)
overheat protection that is connected to the input
or output end in series (Figure2).
50
0
+Vo
Vin
REG
Time (sec.)
0V
DC DC
GND
-Vo
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
REG
REG
+Vo
Vin
First Angle Projection
0V
DC DC
GND
RECOMMENDED FOOTPRINT
-Vo
Top view,grid:2.54mm(0.1inch)
(Figure2)
Overload Protection
0.25
(0.010)
2.54
(0.100)
A_T-W2
A_XT-W2
8
7 6
7
10 9
10
1
Under normal operating conditions, the output
circuit of these products has no protection against
over-current and short-circuits. The simplest
method is to connect a self-recovery fuse in series
at the input end or add a circuit breaker to the
circuit.
(0.600)
15.24
1.8
10.16
(0.400)
1
2
3
4
2
4
5
5
1.2
(0.047)
FOOTPRINT DETAILS
0.60 0.05
(0.024 0.002)
2.54 0.10
Pin
Function(XT)
Function(T)
(0.100 0.004)
1
2
4
GND
Vin
0V
GND
Vin
0V
No parallel connection or plug and play.
6.76
(0.266)
5
7
10
-Vo
+Vo
NC
-Vo
+Vo
NC
Note:
A
1. All specifications measured at Ta=25°C, humidity<75%,
nominal input voltage and rated output load unless
otherwise specified.
1.85
(0.073)
7.15
(0.280)
0.25
(0.010)
3, 6, 8, 9
NC:No Connection
NC
NO PIN
2. Only typical models listed, specifications of custom
product may be different. Please contact our service
people directly for certain conditions.
3. Operation under minimum load will not damage the
converter; However, they may not meet all specification
listed.
Note:
Unit:mm(inch)
Pin section:0.60*0.25mm(0.024*0.010inch)
Pin section tolerances: 0.10mm( 0.004inch)
General tolerances: 0.15mm( 0.006inch)
(0.020)
0.50
1.35
(0.053)
。
5.00
The copyright and authority for the interpretation of the products are reserved by Mornsun
Specifications subject to change without notice.
A_(X)T-W2
A/1-2008
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