COMMON SPECIFICATION
Item
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Cooling
Case material
Short circuit protection*
MTBF
Weight
*
Supply voltage must be discontinued at the end of short circuit duration.
3500
1.70
1.5mm from case for 10 seconds
-40
-55
15
Test Conditions
Min
Typ.
Max
95
85
125
25
260
Free air convection
Plastic(UL94-V0)
1
s
K hours
g
°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 sm all,
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
TYPICAL CHARACTERISTICS
Vin
C
+Vo
C
DC DC
0V
-Vo
GND
L
C
(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
Operating Temp.(
o
C)
arise. It’s not recommended to connect any
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
protection is a linear voltage regulator with
overheat protection that is connected to the input
or output end in series (Figure2).
RECOMMENDED REFLOW SOLDERING PROFILE
250
Temperature (
o
C)
200
150
100
50
0
Time ( s ec . )
90 Sec Max
(>220
o
C )
260
o
C
1 0 S ec M ax
22 0
o
C
Vin
GND
+Vo
RE G
DC
DC
0V
-Vo
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
4.25
(0.167)
First Angle Projection
REC OMME NDE D FOO TP RINT
To p
view,gr id :2.5 4m m(0 .1 inch)
Vin
GND
RE G
+Vo
0V
DC DC
RE G
6.50
(0.250)
6.25
(0.240)
-Vo
2.54
(0.100)
0.25
(0 .010)
A_T-W2
10 9 8 7 6
A_XT-W2
10
1 2
7
4 5
(Figure2)
Overload Protection
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.
No parallel connection or plug and play.
15 .24 (0.600)
10.1 6
(0 .400)
(0.441)
7.50
( 0.295)
11.20
1.8
1 2 3 4 5
1.2
(0.047)
2 .54 0.10
(0.1 00 0.004 )
6 .76
(0.26 6)
0.60 0.05
(0 .0 24 0.00 2)
A
1.85
(0.07 3)
7 .15
(0.28 0)
0.25
(0.010)
FOO TPRINT DE TAIL S
P in
Functio n(T) Fun ction (X T)
1
GND
G ND
2
Vin
Vin
4
0V
0V
5
-Vo
-Vo
7
+Vo
+ Vo
10
NC
NC
3
,
6
,
8
,
9
NC
NO P IN
NC:No Con nection
Note :
Unit:mm (inch)
P in section:0.60 *0 .2 5m m(0 .024*0 .010 inch)
P in section tolerances: 0.10mm( 0 .004inch)
G eneral tole ran ces: 0.1 5m m( 0.00 6in ch)
0 .50 (0.02 0)
1.35
(0 .0 53)
5 .00
。
Note:
1. All specifications measured at Ta=25°C, humidity<75%,
nominal input voltage and rated output load unless
otherwise specified.
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.
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
Page 2 of 2
MORNSUN [ MORNSUN SCIENCE& TECHNOLOGY LTD. ]
