B0503SD-W2 Datasheet, PDF (2/3 Pages) MORNSUN Science& Technology Ltd. – SINGLE OUTPUT DC-DC CONVERTER

OUTPUT SPECIFICATIONS
Item
Test conditions
Min. Typ. Max. Units
Output power
Line regulation
For Vin change of ±1%(3.3V output)
For Vin change of ±1%(others output)
0.25 W
±1.5
±1.2
10% to 100% load(3.3V output)
15 20
10% to 100% load (5V output)
12.8 15 %
Load regulation
10% to 100% load (9V output)
8.3 15
10% to 100% load (12V output)
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
110
kHz
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of
Power Converter section, application notes.
APPLICATION NOTE
TYPICAL CHARACTERISTICS
Operating Temp.(^oC)
RECOMMENDED CIRCUIT
1) 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.
2) Recommended 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. It’s not recommended to connect any external capacitor in the
application field.
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).
L
Vin
Cin
GND
DC DC
L
+Vo
Cout
0V
(Figure 1)
Vin
REG
+Vo
DC DC
GND
0V
Vin
GND
REG
+Vo
DC DC
0V
(Figure 2)
4) 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.
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.
B_S(D)-W2
B/2-2012 Page 2 of 3