F0305D-1W Datasheet, PDF (2/3 Pages) MORNSUN Science& Technology Ltd. – DUAL/SINGLE OUTPUT DC-DC CONVERTER

ISOLATION SPECIFICATIONS
Item
Test conditions
Min. Typ. Max. Units
Isolation voltage Tested for 1 minute and 1 mA max 3000
VDC
Isolation resistance Test at 500VDC
1000
MΩ
OUTPUT SPECIFICATIONS
Item
Test conditions
Min Typ Max Units
Output power
Line regulation
0.1
For Vin change of (3.3V output)
±1%
(Others output)
1
W
±1.5
±1.2
(3.3V output)
12
20
(5V output)
10
15
%
Load regulation
10% to 100% load (9V output)
8.3
15
(12V output)
6.8
15
(15V output)
6.3
15
Output voltage accuracy
Temperature drift 100% full load
See tolerance envelope graph
±0.03 %/°C
Ripple& Noise*
20MHz Bandwidth(EXXXXD-1W)
20MHz Bandwidth(FXXXXD-1W)
50
75
mVp-p
75 100
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: Dual output models unbalanced load: ±5%.
APPLICATION NOTE
TYPICAL CHARACTERISTICS
Operating Temp.(^oC)
RECOMMENDED CIRCUIT
Requirement on output load
To ensure this module can operate efficiently and reliably, During operation, 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 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 recommended 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).
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
Dual Output
L
Vin
L
+Vo
Cout
Cin
GND
DC DC
L ^Cout
0V
-Vo
Single Output
L
Vin
L
+Vo
Cin
DC DC
Cout
GND
0V
(Figure 1)
Dual Output
Vin
REG
REG
GND
DC DC
REG
Single Output
Vin
REG
REG
GND
DC DC
+ Vo
0V
-Vo
+ Vo
0V
(Figure 2)
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
(VDC)
Cin
(uF)
Single
Vout
(VDC)
Cout
(uF)
Dual
Vout
(VDC)
Cout
(uF)
3.3/5 4.7 3.3/5 10
±5
4.7
12 2.2
9
4.7 ±9 2.2
15
2.2
12
2.2 ±12
1
24
1
15
1
±15 0.47
It’s not recommended to connect any external
capacitor in the application field with less than
0.5 watt output.
The copyright and authority for the interpretation of the products are reserved by Mornsun
Specifications subject to change without notice.
E_D-1W & F_D-1W A/2-2009 Page 2 of 3