D051212S-1W Datasheet, PDF (2/3 Pages) MORNSUN Science& Technology Ltd. – UNREGULATED TWIN OUTPUT DC-DC CONVERTER

ISOLATION SPECIFICATIONS
Item
Test conditions
Min. Typ. Max. Units
Isolation
voltage
Tested for 1 minute and 1mA max(Vin/Vout) 1000
Tested for 1 minute and 1mA max(Vo1/Vo2) 1000
VDC
Isolation
Test at 500VDC (Vin/Vout)
resistance _{Test at 500VDC (Vo1/Vo2)}
1000
1000
MΩ
Isolation
(Vin/Vout)
capacitance _(Vo1/Vo2)
130
pF
130
TYPICAL CHARACTERISTICS
OUTPUT SPECIFICATIONS
Item
Test conditions
Min. Typ. Max. Units
Output power
0.1
1
W
Line regulation
For Vin change of ±1%
±1.2
10% to 100% load (5V output)
12.8 15
Load regulation
10% to 100% load (9V output)
10% to 100% load (12V output)
8.3 15
%
6.8 15
10% to 100% load (15V output)
6.3 15
Output voltage accuracy
Temperature drift
100% full load
See tolerance envelope graph
±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.
Operating Temp.(^oC)
APPLICATION NOTE
1) 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 could not be less than 10% of the full 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.
2) 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).
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).
RECOMMENDED CIRCUIT
L
Vin
Cin
GND
DC DC
L
Cout
L
Cout
+Vo1
0V1
+Vo2
0V2
(Figure 1)
Vo1
Vin
REG
0V1
GND
DC DC
Vo2
0V2
REG
+Vo
Vin
GND
0V
DC DC
REG
+Vo
0V
(Figure 2)
3) 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).
4) 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.
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin (VDC) Cin (μF) Vout(VDC) Cout (μF)
5
4.7
5
4.7
12
2.2
9
2.2
24
1
12
1
--
--
15
0.47
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
5) No parallel connection or plug and play
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
D_(N)S-1W&D_(N)D-1W A/4-2012 Page 2 of 3