DC-DC Converter UNIT
DU Series
( 5W UNREGULATED DC-DC CONVERTER )
TYPICAL APPLICATIONS
SINGLE OUTPUT
INPUT
+Vin
+Vout
DUAL OUTPUT
INPUT
+Vin
+Vout
OUTPUT
OUTPUT
LOAD1
DC-DC
CONVERTER
-Vin
-Vout
LOAD
DC-DC
CONVERTER
-Vin
Common
LOAD2
-Vout
TYPICAL PERFORMANCE CUREVES
Specifications typical at ta=25
O
C , nominal input voltage , rated output current unless otherwise specified.
EFFICIENCY VS LOAD
EFFICIENCY(%)
80.0
60.0
40.0
20.0
0.0
0
20
40
60
80
100
DERATING CURVE
OUTPUT POWER(%)
125%
100%
75%
50%
25%
0%
-25
0
25
50
70
100
SAFE
OPERATING
AREA
% OF RATED LOAD(%)
TA(degree C)
DU SERIES APPLICATION NOTES:
EXTERNAL CAPACITANCE REQUIREMENTS:
No external capacitance is required for operation of the DU series.
To meet the reflected ripple requirements of the converter,an input impedance of less than 0.5 ohm
from DC to 100KHz is required.
External output capacitance is not required for operation,however it is recommended that 10uF
tantalum and 0.1uF ceramic capacitance be selected for reduced system noise.
Additional output capacitance may be added for increased filtering,but should not exceed 220uF.
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Version: 4-Oct-02
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