ELECTRICAL CHARACTERISTICS CURVES

(%)

95

 

 

 

 

 

93

 

 

 

 

 

EFFICIENCY

 

 

 

 

 

91

 

 

 

 

 

89

 

 

 

 

 

 

 

 

 

 

 

 

87

 

 

 

 

 

 

85

 

 

 

 

 

 

83

 

 

 

 

 

 

81

 

 

 

 

 

 

79

 

 

 

 

 

 

77

 

36Vin

48Vin

75Vin

 

 

 

 

 

 

 

 

75

 

 

 

 

 

 

0.8

1.0

1.2

1.4

1.6

1.8

OUTPUT VOLTAGE (V)

(W)

15.0

 

36Vin

48Vin

 

75Vin

DISSIPATION

14.0

 

 

 

 

 

 

 

13.0

 

 

 

 

 

12.0

 

 

 

 

 

POWER

 

 

 

 

 

11.0

 

 

 

 

 

 

 

 

 

 

 

 

10.0

 

 

 

 

 

 

9.0

 

 

 

 

 

 

8.0

 

 

 

 

 

 

7.0

 

 

 

 

 

 

6.0

 

 

 

 

 

 

5.0

 

 

 

 

 

 

0.8

1.0

1.2

1.4

1.6

1.8

OUTPUT VOLTAGE (V)

Figure 5: Efficiency vs. output voltage for minimum, nominal, and maximum input voltage at 25°C. (Iout=40A)

Figure 6: Power dissipation vs. output voltage for minimum, nominal, and maximum input voltage at 25°C. (Iout=40A)

(A)

3.0

 

 

 

 

 

 

 

 

 

INPUT CURREN

2.5

 

 

Io=40A

 

 

Io=24A

 

Io=4A

 

 

 

 

 

 

 

 

 

2.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.5

 

 

 

 

 

 

 

 

 

 

1.0

 

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

0.0

 

 

 

 

 

 

 

 

 

 

30

35

40

45

50

55

60

65

70

75

INPUT VOLTAGE (V)

Figure 7: Typical input characteristics at room temperature

Figure 8: Turn-on transient at full rated load current (resistive

 

load) (5 ms/div). Top Trace: Vout; 1V/div; Bottom Trace:

 

ON/OFF input: 2V/div

4

Page 4
Image 4
Delta Electronics Q48SR manual Typical input characteristics at room temperature