D_(N)S-1W & D_(N)D-1W Series
1W, FIXED INPUT ISOLATED & UNREGULATED
TWIN OUTPUT DC-DC CONVERTER
RoHS
FEATURES
High Efficiency up to 80%
Small Footprint
1KVDC Isolation
Temperature Range: -40°C to +85°C
Internal SMD Construction
No External Component Required
Industry Standard Pinout
RoHS Compliance
PRODUCT PROGRAM
Input
Part
number
D050505(N)S-1W
D050909(N)S-1W
D051212(N)S-1W
D051515(N)S-1W
D050505(N)D-1W
D050909(N)D-1W
D051212(N)D-1W
D051515(N)D-1W
D120505(N)S-1W
D120909(N)S-1W
D121212(N)S-1W
D121515(N)S-1W
D120505(N)D-1W
D120909(N)D-1W
D121212(N)D-1W
D121515(N)D-1W
D240505(N)S-1W
D240909(N)S-1W
D241212(N)S-1W *
D241515(N)S-1W *
D240505(N)D-1W
D240909(N)D-1W
D241212(N)D-1W *
D241515(N)D-1W *
* Designing.
D_NS/ND-1W series: UL pending.
output
Voltage
(VDC)
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
Current (mA)
Max
100
56
42
33
100
56
42
33
100
56
42
33
100
56
42
33
100
56
42
33
100
56
42
33
Min
10
6
4
3
10
6
4
3
10
6
4
3
10
6
4
3
10
6
4
3
10
6
4
3
70
76
77
78
70
76
77
78
72
78
78
80
72
78
78
80
71
74
76
76
71
74
76
76
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
UL
Efficiency
Certificate
(%, Typ)
Voltage (VDC)
Nominal
Range
5
4.5-5.5
APPLICATIONS
The D_(N)S-1W & D_(N)D-1W Series are
specially designed for applications where a
group of polar power supplies are isolated from
the input power supply in a distributed power
supply system on a circuit board.
These products apply to:
1) Where the voltage of the input power supply
is fixed (voltage variation
≤ ±10%);
2) Where isolation is necessary between input
and output (isolation voltage
≤1000VDC);
3) Where the regulation of the output voltage
and
the
output
ripple
noise
are
not
demanding.
Such as: purely digital circuits, ordinary low
frequency analog circuits, and IGBT power
device driving circuits.
12
10.8-13.2
24
21.6-26.4
MODEL SELECTION
D050505S-1W
Rated P ower
Package Styl e
The 2nd Output Voltage
The 1st Output Voltage
Input Voltage
Product Series
COMMON SPECIFICATIONS
Item
Storage humidity
Operating temperature
Storage temperature
Lead temperature
Temp. rise at full load
Short circuit protection*
1.5mm from case for 10 seconds
15
-40
-55
Test conditions
Min
Typ
Max
95
85
125
300
25
1
Free air convection
Plastic (UL94-V0)
3500
2.3
K hours
g
s
°C
Units
%
MORNSUN Science & Technology co.,Ltd.
Address: 2th floor 6th building, Huangzhou
Industrial District, Guangzhou, China
Tel: 86-20-38601850
Fax:86-20-38601272
Http://www.mornsun-power.com
Cooling
Case material
MTBF
Weight
*Supply voltage must be discontinued at the end of short circuit duration.
MORNSUN reserves the copyright
Specifications subject to change without notice.
D_(N)S-1W&D_(N)D-1W A/1-2008
Page 1 of 2
ISOLATION SPECIFICATIONS
Item
Isolation
voltage
Isolation
resistance
Isolation
capacitance
Test conditions
Min
Typ
Max
Units
VDC
MΩ
130
130
pF
Tested for 1 minute and 1mA max(Vin/Vout) 1000
Tested for 1 minute and 1mA max(Vo1/Vo2) 1000
Test at 500VDC (Vin/Vout)
Test at 500VDC (Vo1/Vo2)
(Vin/Vout)
(Vo1/Vo2)
1000
1000
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.
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
L
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
Load regulation
Output voltage accuracy
Temperature drift
Ripple & Noise*
Switching frequency
100% full load
20MHz Bandwidth
Full load, nominal input
50
100
For Vin change of 1%
10% to 100% load
12.8
Test conditions
Min
0.1
Typ
Max
1
±1.2
15
0.03
75
Units
W
%
See tolerance envelope graph
%/°C
mVp-p
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.
+Vo1
Cout
Vin
Cin
DC DC
L
Cout
0V1
+Vo2
0V2
GND
TYPICAL CHARACTERISTICS
(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)
Operating Temp.(
o
C)
Vout(VDC) Cout (uF)
5
9
12
15
4.7
2.2
1
0.47
OUTLINE DIMENSIONS & PIN CONNECTIONS
First Angle Projection
D_(N)S-1W SI P Package
(0.035)
Other
models (0.236)
D241515S-1W
7.0 0
D241212S-1W
(0.276 )
D_(N)D-1W DIP Pa ckage
5
12
24
--
4.7
2.2
1
--
It’s not recommend to connect any external capacitor in
the application field with less than 0.5 watt output.
(Bot tom View)
1
14
11 10
7
9 8
(0.079)
(0.100)
(0.772)
(0.374)
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).
Vo1
Vin
4.10
4.10
(Side Vie w)
REG
DC DC
GND
REG
Vin
0V1
Vo2
0V2
+Vout
0V
0. 50
(0. 020)
RECOMMENDED FOOTPRINT
Top
view,grid:2.5 4mm (0. 1inch)
diameter:1. 00mm(0 .039 in ch)
DC DC
14
1 2
4 5 6 7
1
FOOTPRI NT DETAILS
Pin
1
2
4
5
6
D_ S-1 W
Vin
G ND
0V1
+Vo1
0V2
D_NS-1 W
Vin
GND
+Vo1
0V1
+Vo2
Pin
1
7
8
9
10
11
14
D_ D-1W
GND
NC
+Vo2
0V2
+Vo1
0V1
Vin
D_ ND-1W
GND
NC
0V2
+Vo2
0V1
+Vo1
Vin
REG
+Vout
0V
11 10 9 8
7
GND
(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.
+Vo2
0V2
7
Note:
Unit:m m(inch)
Pin s ection:0. 50*0 .30m m(0.02 0*0.012inch )
Pin s ection tolerances: 0.10 mm( 0. 004inch )
Gen eral tolerances: 0.25 mm ( 0.01 0inch)
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
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