Lineage Power

8

Data Sheet

March 27, 2008

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

QRW025 Series Power Modules; dc-dc Converters

Characteristic Curves

The following figures provide typical characteristics curves for the QRW025A0M (VO = 1.5 V) module at room temperature

(TA = 25 °C)

Figure 9.

Output Ripple Voltage (IO = IO, max).

Tested with a 220µF aluminium and a 1.0µF ceramic capacitor

across the load.

Figure 10. Transient Response to Step Decrease in

Load from 50% to 25% of Full Load (VI = 48

Vdc).

Figure 11.

Transient Response to Step Increase in

Load from 50% to 75% of Full Load (VI = 48

Vdc).

Tested with a 10µF aluminium and a 1.0µF tantalum capacitor

across the load.

Figure 12. Start-up from Remote On/Off (IO = IO, max).

0

0.2

0.4

0.6

0.8

1

1.2

1.4

25

35

45

55

65

75

70

72

74

76

78

80

82

84

86

88

90

0

5

10

15

20

25

TIME, t (1 µs/div)

75V, 25A

48V, 25A

36V, 25A

TIME, t (50 µs/div)

TIME, t (50 µs/div)