4

DFA20 SERIES – DUAL OUTPUT

Typical Performance: (Tc=25°C, Vin=Nom VDC, Rated Load)

85

80

75

70

040

30

20

LINE = 18VDC

LINE = 12VDC

LINE = 9VDC

10

50

60

70

80

90 100

12 VOLT EFFICIENCY Vs. LOAD

LOAD (%)

85

80

75

70

915

13

14

17

16

12

11

100% FULL LOAD

50% FULL LOAD

10

18

12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE

LINE INPUT (VOLTS)

90

80

85

75

70

040

30

20

LINE = 36VDC

LINE = 24VDC

LINE = 18VDC

10

50

60

70

80

90 100

24 VOLT EFFICIENCY Vs. LOAD

LOAD (%)

90

85

80

75

18

30

26

28

34

32

24

22

100% FULL LOAD

50% FULL LOAD

20

36

24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE

LINE INPUT (VOLTS)

90

80

75

60

040

30

20

LINE = 72VDC

LINE = 48VDC

LINE = 36VDC

10

50

60

70

80

90 100

48 VOLT EFFICIENCY Vs. LOAD

LOAD (%)

90

85

80

75

70

36

60

52

56

68

64

48

44

100% FULL LOAD

50% FULL LOAD

40

72

48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE

LINE INPUT (VOLTS)

1.00

0.50

0.75

0.25

0.00

040

30

20

100% LOAD

50% LOAD

10

50

60

70

80

48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE

LINE INPUT (VOLTS)

2)

The efficiency curves are for 12 volt output models. To use for other models

adjust as follows:

±5 volt models subtract approximately 3%.

±15volt models add approximately 1%.

NOTES ON USING THE CURVES

1)

The input currents are for 20 watts of output power. For ±5 volt output models

the current is approximately 15% less.

2.0

1.0

1.5

0.5

0.0

016

12

8

100% LOAD

50% LOAD

420

24

28

32

36

24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE

LINE INPUT (VOLTS)

3.5

3.0

2.0

2.5

1.0

1.5

0.5

0.0

08

6

4

100% LOAD

50% LOAD

210

12

14

16

18

12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE

LINE INPUT (VOLTS)