ISOLATION CHARACTERISTICS
Item
Isolation voltage
Isolation resistance
Isolation capacitance
Test Conditions
Tested for 1 minute and 1mA max
Test at 500VDC
Min
6000
1000
10
Typ
Max
Units
VDC
MΩ
pF
Recommended testing and application 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
Vin
Cin
G ND
L
+Vo
TYPICAL CHARACTERISTICS
DC DC
(Figure 1)
Cout
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. For every
Operating Temp.(
o
C)
channel of output, provided the safe and reliable
operation is ensured, the recommended capacitance
of its filter capacitor sees (Table 1).
EXTERNAL CAPACITOR TABLE (Table 1)
RECOMMENDED REFLOW SOLDERING PROFILE
2 50
Temperature ( C )
2 00
1 50
1 00
50
0
P eak. Temp 26 0 C
10 Sec Max
220 C
Vin
(VDC)
5
12
24
Cin
(uF)
4.7
2.2
1
Single Vout
(VDC)
5
12
15
Cout
(uF)
10
2.2
1
90 Sec M ax
(> 22 0 C )
It’s not recommend to connect any external capacitor in the
application field with less than 0.5 watt output.
Tim e (s ec .)
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
23.86 (0.940)
8.00
(0.315)
7.50
(0.295)
(Side View)
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 (Figure
2).
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
3.04
(0.120)
18.50(0.728)
16
(Top View)
2.54
(0.100)
16
10 9
13.70
(0.540)
10 9
7 8
2.00
(0.079)
Vin
GND
REG
+Vout
DC DC
0V
REG
1
15.24(0.600)
78
1
Vin
1.00
(0.039)
+Vout
GND
DC DC
0V
FOOTPRINT DETAILS
A
(Figure 2)
Overload Protection
Under norm al 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.
No parallel connection or plug and play.
13.10
(0.516)
18.50(0.728)
A
0.50
(0.020)
Pin
Function
1
GND
7
NC
8
NC
+Vo
9
10
-Vo
16
Vin
NC:No Connection
Note:
Unit:mm(inch)
Pin section:0.60*0.25mm(0.024*0.010inch)
Pin tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
5.0MAX
1.35
(0.053)
APPLICATION NOTE
Requirement On Output Load
To ensure this module can operate efficiently and reliably, a minimum load is
specified for this kind of DC/DC converter in addition to a maximum load (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.
0.2 5
(0.010)
。
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, other models may be different,
please contact our technical person for more details.
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.
H_LT-2W
A/0-2009
Page 2 of 2
MORNSUN [ MORNSUN SCIENCE& TECHNOLOGY LTD. ]
