VIV0104THJ

Rev. 1.3

9/2009

Page 5 of 16

V•I CHIP INC. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200

vicorpower.com

No Load Power Dissipation vs. Line

Input Voltage (V)

-40°C

25°C

100°C

T

:

CASE

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55

Full Load Efficiency vs. Case Temperature

Case Temperature (°C)

26 V

42 V

55 V

V :

IN

87

88

89

90

91

92

93

94

-40

-20

0

20

40

60

80

100

Efficiency & Power Dissipation -40°C Case

Output Current (A)

26 V

42 V

55 V

V :

IN

26 V

42 V

55 V

55

60

65

70

75

80

85

90

95

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

0

2

4

6

8

10

12

14

16

η

Efficiency & Power Dissipation 25°C Case

Output Current (A)

26 V

42 V

55 V

V :

IN

26 V

42 V

55 V

η

68

70

72

74

76

78

80

82

84

86

88

90

92

94

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

0

1

2

3

4

5

6

7

8

9

10

11

12

13

Efficiency & Power Dissipation 100°C Case

Output Current (A)

26 V

42 V

55 V

V :

IN

26 V

42 V

55 V

η

66

68

70

72

74

76

78

80

82

84

86

88

90

92

94

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Case Temperature (°C)

I

:

OUT

2.5 A

25 A

5.5

6

6.5

7

7.5

8

8.5

9

-40

-20

0

20

40

60

80

100

Figure 3a – Efficiency and power dissipation at –40°C (case)

Figure 3b – Efficiency and power dissipation at 25°C (case)

Figure 3c – Efficiency and power dissipation at 100°C (case)