F0505RN-1W Datasheet, PDF (2/3 Pages) MORNSUN Science& Technology Ltd. – SINGLE OUTPUT, DC-DC CONVERTER

ISOLATION SPECIFICATIONS
Item
Test Conditions
Min. Typ. Max. Units
Isolation voltage
Tested for 1 minute and 1mA max 3000
VDC
Isolation resistance Test at 500VDC
1000
MΩ
Isolation capacitance
15
pF
TYPICAL CHARACTERISTICS
RECOMMENDED REFLOW SOLDERING PROFILE
250
2 5 0 ^oC
10 Sec Max
200
2 2 0 ^oC
150
90 Sec Max
100
(>220^oC)
50
0
Time (sec.)
Remark: The curve applies only to the hot air reflow soldering
APPLICATION NOTE
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, or use our company’s products with a lower rated output power.
L
Vin
L
+Vo
Cin
GND
DC DC
Cout
0V
(Figure 1)
2) Recommended testing 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).
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 (Figure2).
4) Overload Protection
Under normal operating conditions, the output circuit of these products has no protection
against over load. The simplest method is to connect a self-recovery fuse in series at the
input end or add a circuit breaker to the circuit.
Vin
REG
+Vo
DC DC
GND
0V
Vin
GND
REG
+Vo
DC DC
0V
(Figure2)
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
Cin
Vout
Cout
(VDC)
(µF)
(VDC)
(µF)
5
4.7
5
10
It’s not recommended to connect any external
capacitor in the application field with less than 0.5
watt output.
4) 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.
F_RN-1W&F_RT-1W B/2-2012 Page 2 of 3