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D241212NS-1W Datasheet(PDF) 2 Page - MORNSUN Science& Technology Ltd.

Part # D241212NS-1W
Description  TWIN OUTPUT DC-DC CONVERTER
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Manufacturer  MORNSUN [MORNSUN Science& Technology Ltd.]
Direct Link  http://www.mornsun-power.com
Logo MORNSUN - MORNSUN Science& Technology Ltd.

D241212NS-1W Datasheet(HTML) 2 Page - MORNSUN Science& Technology Ltd.

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MORNSUN reserves the copyright
Specifications subject to change without notice.
D_(N)S-1W&D_(N)D-1W
A/1-2008
Page 2 of 2
ISOLATION SPECIFICATIONS
APPLICATION NOTE
Item
Test conditions
Min
Typ
Max
Units
Tested for 1 minute and 1mA max(Vin/Vout) 1000
Isolation
voltage
Tested for 1 minute and 1mA max(Vo1/Vo2) 1000
VDC
Test at 500VDC (Vin/Vout)
1000
Isolation
resistance
Test at 500VDC (Vo1/Vo2)
1000
M
Ω
(Vin/Vout)
130
Isolation
capacitance
(Vo1/Vo2)
130
pF
OUTPUT SPECIFICATIONS
Item
Test conditions
Min
Typ
Max
Units
Output power
0.1
1
W
Line regulation
For Vin change of 1%
±1.2
Load regulation
10% to 100% load
12.8
15
%
Output voltage accuracy
See tolerance envelope graph
Temperature drift
100% full load
0.03
%/
°C
Ripple & Noise*
20MHz Bandwidth
50
75
mVp-p
Switching frequency
Full load, nominal input
100
KHz
*Test ripple and noise by
“parallel cable” method. See detailed operation instructions at Testing
of Power Converter section, application notes.
Note:
1. All specifications measured at TA=25
°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2. See below recommended circuits for more details.
TYPICAL CHARACTERISTICS
Operating Temp.( C)
o
OUTLINE DIMENSIONS & PIN CONNECTIONS
P in
REC OMME NDED FOOTPR INT
Top view,gr id:2.5 4mm (0. 1inch)
diameter :1. 00mm(0 .039 in ch)
Note:
Unit:m m(inch)
P in s ection:0. 50*0 .30m m(0.02 0*0.012inch)
P in s ection toler ances: 0.10 mm( 0. 004inch)
Gen eral toler ances: 0.25 mm ( 0.01 0inch)
(0.079)
0. 50
(0. 020)
(0.100)
12
456 7
D_ S-1W
1
2
4
6
5
V in
G ND
0V1
0V2
+Vo1
7
+Vo2
(0.772)
1
7
8
9
10
11
14
1
7
8
10
9
GND
NC
+Vo2
+Vo1
0V2
11
0V1
14
Vin
Fi rst Angle Projection
8
9
10
11
14
17
D_NS-1W
V in
GND
0V1
0V2
+Vo1
+Vo2
D_ D-1W
GND
NC
+Vo2
+Vo1
0V2
0V1
Vin
D_ ND-1W
D_(N)S- 1W SI P Package
D_ S-1W
D_( N) D- 1W DIP Pa ckage
(B ot tom View)
(Side Vie w)
FOOTP RI NT DETA ILS
P in
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.
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).
Vin
GND
+Vo1
0V1
DC
Cin
L
DC
Cout
+Vo2
0V2
L
Cout
L
(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).
EXTERNAL CAPACITOR TABLE (Table 1)
Vin (VDC) Cin (uF)
Vout(VDC) Cout (uF)
5
4.7
5
4.7
12
2.2
9
2.2
24
1
12
1
--
--
15
0.47
It
’s not recommend to connect any external capacitor in
the application field with less than 0.5 watt output.
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).
Vin
GND
Vin
GND
REG
Vo1
0V1
+Vout
0V
DC DC
DC DC
Vo2
0V2
+Vout
0V
REG
REG
(Figure 2)
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.


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