G1212KS-1W Datasheet, PDF (2/3 Pages) MORNSUN Science& Technology Ltd. – DUAL OUTPUT DC-DC CONVERTER

OUTPUT SPECIFICATIONS
Item
Test Conditions
Min. Typ. Max. Units
Output power
Line regulation
Load regulation
For Vin change of 1%
10% to 100% load
0.1
1
W
±1.2
%
6.8
15
Output voltage accuracy
Temperature drift
100% full load
See tolerance envelope graph
0.03 %/°C
Ripple & Noise*
20MHz Bandwidth
150 200 mVp-p
Switching frequency
Full load, nominal input
50
KHz
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Dual output models unbalanced load: ±5%.
TYPICAL CHARACTERISTICS
APPLICATION NOTE
Operating Temp.(^oC)
RECOMMENDED CIRCUIT
Requirement on output load
To ensure this module can operate efficiently and reliably, During operation, 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.
L
Vin
Cin
DC DC
GND
L
+Vo
Cout
0V
L Cout
-Vo
(Figure 1)
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).
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
REG
REG
+Vo
GND
DC DC
0V
REG
-Vo
(Figure 2)
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
(VDC)
Cin Dual Vout Cout
(uF)
(VDC)
(uF)
12
2.2
±12
2.2
It’s not recommended to connect any external
capacitor in the application field with less than
0.5 watt output.
Overload Protection
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.
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.
G1212KS-1W
A/2-2012 Page 2 of 3