K78L03-1000 Datasheet, PDF (2/3 Pages) MORNSUN Science& Technology Ltd. – WIDE INPUT NON-ISOLATED REGULATED OUTPUT

TEMPERATURE DERATING GRAPH
EXTERNAL CAPACITOR TABLE
Operating Temp.( C )
（figure 1）
TYPICAL APPLICATION CIRCUIT
Part
Number
K78L03-1000
K78L05-1000
K78L09-1000
K78L12-1000
C1
(Ceramic
capacitor)
10µF/50V
10µF/50V
10µF/50V
10µF/50V
C2
(Ceramic
capac it or)
22µF/6.3V
22µF/10V
10µF/16V
10µF/25V
+Vin
1 _K78LXX-1000 3
+Vo ut
C1
2
C2
GND
(figure 2)
GND
1. C1 and C2 are required and should be fitted close to the converter pins.
2. The capacitance of C1, C2 sees external capacitor table, it can be increased properly if required, and tantalum or low ESR electrolytic
capacitors may also suffice.
3. No parallel connection or plug and play.
TEST CONFIGURATIONS (TA=25°C)
1 Efficiency and Output Voltage Ripple Test
25 .4mm
2 5.4 mm
12.7mm
+Vin
1
DC/DC
Converter
3
+Vou t
Copper strip
C1
2
1μ F 10μ F
C2
Scope
C era mi c Ta nta lum
GND
(figure 3)
Copper strip
2 Start-up and Load Transient Response Test
50.8 m m
+Vin
C1
GND
1
DC/DC
Converter
3
2
+Vout
Copper strip
C2
Scope
(figure 4)
Copper strip
OUTPUT RIPPLE REDUCTION
+Vin
DC/DC
L
+Vout
1 _Converter 3
C1
2
GND
C2
22μ F
(figure 5)
To reduce output ripple, it is recommended to add a LC filter in output port.
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78LXX-1000
A/3-2012
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