COMMON SPECIFICATIONS
APPLICATION NOTE
Requirement On Output Load
Item
Test Conditions
Min
Typ
15
Max Units
To ensure this module can operate efficiently and
reliably, a minimum load is specified for this kind of
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Short circuit protection*
Cooling
95
85
%
°C
S
-40
-55
DC/DC converter in addition to
a maximum load
125
25
(namely full load). During operation, make sure the
specified range of input voltage is not exceeded, 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, or use our
company’s products with a lower rated output power
(D_T –1W).
1.5mm from case for 10 seconds
260
1
Free air convection
Plastic (UL94-V0)
package material
MTBF
3500
K hours
g
Weight
2.1
*Supply voltage must be discontinued at the end of short circuit duration.
Recommended testing circuit
If you want to further decrease the input/output ripple,
an “LC” filtering network may be connected to the input
TYPICAL CHARECTERISTICS
and output ends of the DC/DC converter, see (Figure1).
L
+Vo1
L
C
Vin
0V1
+Vo2
L
C
DC DC
GND
C
0V2
(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
(
)
C
Ambient Temperature
RECOMMENDED REFLOW SOLDERING PROFILE
260oC
250
10 Sec M ax
220o C
200
sees (Table 1).
150
EXTERNAL CAPACITOR TABLE (TABLE 1)
90 Sec Max
(>220oC)
100
Vin
(VDC)
5
Cin
(uF)
4.7
Vout
(VDC)
5
Cout
(uF)
4.7
50
12
-
2.2
9
2.2
1
0
Time (sec.)
-
-
12
15
-
0.74
It’s not recommended to connect any external capacitor in the
application field with less than 0.5 watt output.
OUTLINE DIMENSIONS& RECOMMENDED FOOTPRINT
First Angle Projection
Output Voltage Regulation and Over-voltage
Protection Circuit
2.75(0.108)
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
0.25
(0.010)
1.27
(0.050)
The simplest device for output voltage regulation,
over-voltage and over-current protection is a linear
voltage regulator with overheat protection that is
9
14 13 12
10
8
141312 10 9 8
connected to the input or output end in series (Figure2).
Vo1
Vin
REG
0V1
Vo2
DC DC
2.0
GND
1 2 3
5 6
7
0V2
Vo1
1
2
3
5 6 7
REG
REG
15.24(0.600)
17.78(0.700)
1.0
(0.039)
Vin
0V1
Vo2
DC DC
(Figure2)
GND
0V2
FOOTPRINT DETAILS
Function
A
1
2
5
6
9
GND
Vin
0.25
Overload Protection
A
0.50(0.020)
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.
0V1
Vo1
Vo2
1.30 0.13
(0.051 0.005)
5.00。
Note:
10
Others
0V2
NC
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)
NC:No connection
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
D_T-2W
A/0-2008
Page 2 of 2
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