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
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
Package material
Short circuit protection*
MTBF
Epoxy Resin(UL94V-0)
1
s
Recommended testing 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
1.41
*Supply voltage must be discontinued at the end of short circuit duration.
Single Output
TYPICAL CHARACTERISTICS
L
L
+Vo
Vin
Cout
Cin
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. For every channel of output, provided the safe
and reliable operation is ensured, the greatest
capacitance of its filter capacitor sees (Table 1).
Operating Temp.(oC)
RECOMMENDED REFLOW SOLDERING PROFILE
260oC
250
200
150
100
10 Sec Max
220o C
EXTERNAL CAPACITOR TABLE (Table 1)
Vin
Cin
Vout
Cout
(VDC)
(uF)
(VDC)
(uF)
3.3/5
4.7
2.2
0.47
-
3.3/5
9
10
4.7
2.2
1
12
24
-
90 Sec Max
(>220oC)
12
15
50
0
-
-
24
0.47
It’s not recommend to connect any external capacitor in the
application field with less than 0.5 watt output.
Time (sec.)
Output Voltage Regulation and Over-voltage
Protection Circuit
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
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)
(Side view)
protection is a
linear voltage regulator with
overheat protection that is connected to the input
or output end in series (Figure2).
2.54
(0.100)
0.25
(0.100)
B_(X)T-1W
B_T-1W
8 7 6
8
5
5
+Vout
Vin
REG
(0.500)
12.70
2.00
(0.079)
DC DC
7.62
(0.300)
1 2
4
1 2 3 4
GND
0V
REG
+Vout
0V
(0.039)
Vin
(Top view)
DC
DC
GND
FOOTPRINT DETAILS
2.54±0.1
(0.100±0.004)
0.60±0.05
(0.024±0.002)
Pin
Function(T) Function(XT)
（Figure2）
Overload Protection
GND
Vin
0V
+Vo
No Pin
NC
1
2
4
5
GND
Vin
0V
+Vo
NC
6.76
(0.266)
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.
A
3,6,7
8
NC:No Connection
NC
1.85MAX
(0.073)
7.19
(0.283)
0.30
(0.012)
Note:
Unit:mm(inch)
Pin section:0.60*0.25mm(0.024*0.010inch)
Pin tolerances:+0.10mm(+0.004inch)
General tolerances:+0.15mm(+0.006inch)
(0.020)
0.50
1.35MAX
(0.053)
。
5.00
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
B_(X)T-1W
A/2-2008
Page 2 of 2
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