65

70

75

80

85

90

95

0

1020

3040506070

8090

100

Load Current (A)

35 Vin

48 Vin

75 Vin

Product # PQ60012HPAA0

Phone 1-888-567-9596

Doc.# 005-2HP621K Rev. B

1/26/04

Page 5

82

83

84

85

86

87

88

89

90

0

100

200

300

400

500

Air Flow (LFM)

25 C

40 C

55 C

Figure 2: Efficiency at nominal output voltage and 60% rated power vs.

(nominal input voltage).

0

5

10

15

20

25

30

0

10

2030

405060

7080

90

100

Load Current (A)

35 Vin

48 Vin

75 Vin

Figure 3: Power dissipation at nominal output voltage vs. load current

8.0

9.0

10.0

11.0

12.0

13.0

14.0

0

100

200

300

400

500

Air Flow (LFM)

25 C

40 C

55 C

Figure 4: Power dissipation at nominal output voltage and 60% rated

0

10

20

30

40

50

60

70

80

90

100

0

2540

557085

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

0 LFM (0 m/s)

Figure 5: Maximum output power derating curves vs. ambient air tem-

perature for airflow rates of 0 LFM through 400 LFM with air flowing

from input to output (nominal input voltage).

air flowing at the rate of 200 LFM. Air is flowing across the converter

from input to output (nominal input voltage).

Half

Half

Brick

Brick

Performance Curves

48Vin 1.2Vout 100A

Figure 1: Efficiency at nominal output voltage vs. load current for min-